build-appliance-image: Update to mickledore head revision

(From OE-Core rev: c57d1a561db563ed2f521bbac5fc12d4ac8e11a7)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

.gitignore

@@ -36,4 +36,3 @@ _toaster_clones/
 downloads/
 sstate-cache/
 toaster.sqlite
-.vscode/

.templateconf

@@ -0,0 +1,2 @@
+# Template settings
+TEMPLATECONF=${TEMPLATECONF:-meta-poky/conf/templates/default}

LICENSE

@@ -0,0 +1,20 @@
+Different components of OpenEmbedded are under different licenses (a mix
+of MIT and GPLv2). See LICENSE.GPL-2.0-only and LICENSE.MIT for further 
+details of the individual licenses.
+
+All metadata is MIT licensed unless otherwise stated. Source code
+included in tree for individual recipes (e.g. patches) are under 
+the LICENSE stated in the associated recipe (.bb file) unless 
+otherwise stated.
+
+License information for any other files is either explicitly stated 
+or defaults to GPL version 2 only.
+
+Individual files contain the following style tags instead of the full license 
+text to identify their license:
+
+    SPDX-License-Identifier: GPL-2.0-only
+    SPDX-License-Identifier: MIT
+
+This enables machine processing of license information based on the SPDX
+License Identifiers that are here available: http://spdx.org/licenses/

LICENSE.GPL-2.0-only

@@ -0,0 +1,288 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
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+
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+
+Note:
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+
+    SPDX-License-Identifier: GPL-2.0-only
+
+This enables machine processing of license information based on the SPDX
+License Identifiers that are here available: http://spdx.org/licenses/

LICENSE.MIT

@@ -0,0 +1,25 @@
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+Note:
+Individual files contain the following tag instead of the full license text.
+
+    SPDX-License-Identifier: MIT
+
+This enables machine processing of license information based on the SPDX
+License Identifiers that are here available: http://spdx.org/licenses/

MAINTAINERS.md

@@ -0,0 +1,71 @@
+OpenEmbedded-Core and Yocto Project Maintainer Information
+==========================================================
+
+OpenEmbedded and Yocto Project work jointly together to maintain the metadata,
+layers, tools and sub-projects that make up their ecosystems.
+
+The projects operate through collaborative development. This currently takes
+place on mailing lists for many components as the "pull request on github"
+workflow works well for single or small numbers of maintainers but we have
+a large number, all with different specialisms and benefit from the mailing
+list review process. Changes therefore undergo peer review through mailing
+lists in many cases.
+
+This file aims to acknowledge people with specific skills/knowledge/interest
+both to recognise their contributions but also empower them to help lead and
+curate those components. Where we have people with specialist knowledge in
+particular areas, during review patches/feedback from these people in these
+areas would generally carry weight.
+
+This file is maintained in OE-Core but may refer to components that are separate
+to it if that makes sense in the context of maintainership. The README of specific
+layers and components should ultimately be definitive about the patch process and
+maintainership for the component.
+
+Recipe Maintainers
+------------------
+
+See meta/conf/distro/include/maintainers.inc
+
+Component/Subsystem Maintainers
+-------------------------------
+
+* Kernel (inc. linux-yocto, perf): Bruce Ashfield
+* Reproducible Builds: Joshua Watt
+* Toaster: David Reyna
+* Hash-Equivalence: Joshua Watt
+* Recipe upgrade infrastructure: Alex Kanavin
+* Toolchain: Khem Raj
+* ptest-runner: Aníbal Limón
+* opkg: Alex Stewart
+* devtool: Saul Wold
+* eSDK: Saul Wold
+* overlayfs: Vyacheslav Yurkov
+
+Maintainers needed
+------------------
+
+* Pseudo
+* Layer Index
+* recipetool
+* QA framework/automated testing
+* error reporting system/web UI
+* wic
+* Patchwork
+* Patchtest
+* Matchbox
+* Sato
+* Autobuilder
+
+Layer Maintainers needed
+------------------------
+
+* meta-gplv2 (ideally new strategy but active maintainer welcome)
+
+Shadow maintainers/development needed
+--------------------------------------
+
+* toaster
+* bitbake
+
+

MEMORIAM

@@ -0,0 +1,5 @@
+Some project contributors who are sadly no longer with us:
+
+Greg Gilbert (treke) - Ahead of his time with licensing
+Thomas Wood (thos) - Creator of the original sato
+Scott Rifenbark (scottrif) - Our long standing techwriter whose words live on

Makefile

@@ -0,0 +1,35 @@
+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line, and also
+# from the environment for the first two.
+SPHINXOPTS    ?=
+SPHINXBUILD   ?= sphinx-build
+SOURCEDIR     = .
+BUILDDIR      = _build
+DESTDIR       = final
+
+ifeq ($(shell if which $(SPHINXBUILD) >/dev/null 2>&1; then echo 1; else echo 0; fi),0)
+$(error "The '$(SPHINXBUILD)' command was not found. Make sure you have Sphinx installed")
+endif
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile.sphinx clean publish
+
+publish: Makefile.sphinx html singlehtml
+	rm -rf $(BUILDDIR)/$(DESTDIR)/
+	mkdir -p $(BUILDDIR)/$(DESTDIR)/
+	cp -r $(BUILDDIR)/html/* $(BUILDDIR)/$(DESTDIR)/
+	cp $(BUILDDIR)/singlehtml/index.html $(BUILDDIR)/$(DESTDIR)/singleindex.html
+	sed -i -e 's@index.html#@singleindex.html#@g' $(BUILDDIR)/$(DESTDIR)/singleindex.html
+
+clean:
+	@rm -rf $(BUILDDIR)
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile.sphinx
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

README

@@ -1,114 +0,0 @@
-The poky repository master branch is no longer being updated.
-
-You can either:
-
-a) switch to individual clones of bitbake, openembedded-core, meta-yocto and yocto-docs
-
-   https://docs.yoctoproject.org/dev/dev-manual/poky-manual-setup.html
-
-b) use the new bitbake-setup
-
-     https://docs.yoctoproject.org/bitbake/dev/bitbake-user-manual/bitbake-user-manual-environment-setup.html
-
-You can find more information in our documentation: https://docs.yoctoproject.org/
-
-Note that "poky" the distro setting is still available in meta-yocto as
-before and we continue to use and maintain that.
-
-Long live Poky!
-
-
-
-
-Some further information on the background of this change follows. The 
-details are taken from:
-https://lists.openembedded.org/g/openembedded-architecture/message/2179
-
-TLDR: People have complained about the combo-layer built poky
-repository for years. It was meant to be a temporary thing, we now have
-an alternative and I'm therefore doing what I promised I'd do. Change
-is tough, things may break but this is the right point to at least try
-it.
-
-I'd like to note that:
-  * setting up builds with a separate oe-core and bitbake clone 
-    works as it always has done
-  * you can change your CI just to use those two repos instead of poky
-  * bitbake-setup isn't mandatory, it will just be what the yocto-
-    docs presents to users
-  * we don't have to stop maintaining the poky repository 
-    however nobody will test the new approach/code unless we do
-  * we are optionally exposing sstate mirrors in the new config
-  * we are also exposing config fragments to users
-  * poky as a DISTRO in meta-yocto remains
-
-A bit more about the history and background for those who are
-interested and then some FAQs:
-
-Back around 2010 when we split up openembedded-classic and started
-developing layers, we made the artificial "poky" repository construct
-as a way to let people easily and quickly get started with the project.
-without cloning and managing multiple repositories. Layers were a new
-idea with lots of rough edges. kas didn't exist, I think repo was only
-just created and it was a different world. For us, it meant hacking up
-a quick tool, "combo-layer" and it was really a temporary solution to
-fill a gap and it was at least as functional as repo of the era. It was
-assumed we'd work it out properly in the future.
-
-At developer meetings there are inevitable questions about why
-poky/combo-layer exist and few seem to actually like/support it. There
-are continual questions about why a tool doesn't exist or why we don't
-adopt one too.
-
-15 years later, a bit longer than we might have thought, we are finally
-in a position where there may be a viable way forward to change.
-
-It has taken us a bit of time to get to this point. I wrote the
-original description of something like bitbake-setup about 7-8 years
-ago. I shared it privately with a few people, the review feedback
-stopped me pushing it further as I simply did not have the bandwidth.
-We were fortunate to get funding from the Sovereign Tech Fund to start
-the work and whilst I'd probably prefer to avoid the issue, the time
-had come to start. Since then, Alexander Kanavin has put a lot of work
-into getting it to the point where it would be possible to switch. A
-huge thanks to him for getting this to the current point.
-
-Why not use kas/submodules/repo?
-
-This topic has been discussed in depth several times. Very roughly,
-these are either difficult to focus on our use cases or have specific
-designs and intent which we as a project would struggle to influence.
-We are taking significant influence from some of them but also trying
-to build something where we can benefit from tight direct integration
-with bitbake and the metadata. For example fragment support is generic
-and hopefully something other approaches can also benefit from. We want
-to provide something we can switch the projects docs and autobuilder to
-which we can control and develop as we need it to. We are not aiming to
-force anyone to switch, you can use whichever tool you want.
-
-Can we not keep poky [repository master branch] around?
-
-If we do that, nobody will use the new tooling and it will be a
-disaster as issues won't get resolved. We need our CI to use the same
-thing we promote to our new and experienced users. We need this new
-tooling to be usable by our experienced developers too. We have tried
-for months to get people to try it and they simply don't. Making a
-release with it won't change much either. It needs people using it and
-for that, poky has to stop being updated.
-
-What happens to poky [repository]?
-
-The LTS branches continue their lifetime as planned. For master, I'll
-probably put a final commit in changing to just a README which points
-people at the bitbake-setup changes and explains what happened.
-
-What are the timelines? Why now?
-
-If we're going to make a change, we really want this in the next LTS
-release, which is April 2026. We only have one release before that
-which is now, October 2025. We therefore need to switch now, and then
-give us time to update docs, fix issues that arise and so on and have
-it in a release cycle. Whilst it means delaying the Oct 2025 release
-slightly, that is the right thing to do in the context of the bigger
-picture.
-

README.OE-Core.md

@@ -0,0 +1,29 @@
+OpenEmbedded-Core
+=================
+
+OpenEmbedded-Core is a layer containing the core metadata for current versions
+of OpenEmbedded. It is distro-less (can build a functional image with
+DISTRO = "nodistro") and contains only emulated machine support.
+
+For information about OpenEmbedded, see the OpenEmbedded website:
+    https://www.openembedded.org/
+
+The Yocto Project has extensive documentation about OE including a reference manual
+which can be found at:
+    https://docs.yoctoproject.org/
+
+
+Contributing
+------------
+
+Please refer to
+https://www.openembedded.org/wiki/How_to_submit_a_patch_to_OpenEmbedded
+for guidelines on how to submit patches.
+
+Mailing list:
+
+    https://lists.openembedded.org/g/openembedded-core
+
+Source code:
+
+    https://git.openembedded.org/openembedded-core/

README.hardware.md

@@ -0,0 +1 @@
+meta-yocto-bsp/README.hardware.md

README.md

@@ -0,0 +1 @@
+README.poky.md

README.poky.md

@@ -0,0 +1 @@
+meta-poky/README.poky.md

README.qemu.md

@@ -0,0 +1,15 @@
+QEMU Emulation Targets
+======================
+
+To simplify development, the build system supports building images to
+work with the QEMU emulator in system emulation mode. Several architectures
+are currently supported in 32 and 64 bit variants:
+
+  * ARM (qemuarm + qemuarm64)
+  * x86 (qemux86 + qemux86-64)
+  * PowerPC (qemuppc only)
+  * MIPS (qemumips + qemumips64)
+
+Use of the QEMU images is covered in the Yocto Project Reference Manual.
+The appropriate MACHINE variable value corresponding to the target is given
+in brackets.

bitbake/.gitattributes

@@ -0,0 +1,2 @@
+*min.js binary
+*min.css binary

bitbake/AUTHORS

@@ -0,0 +1,10 @@
+Tim Ansell <mithro@mithis.net>
+Phil Blundell <pb@handhelds.org>
+Seb Frankengul <seb@frankengul.org>
+Holger Freyther <holger@moiji-mobile.com>
+Marcin Juszkiewicz <marcin@juszkiewicz.com.pl>
+Chris Larson <kergoth@handhelds.org>
+Ulrich Luckas <luckas@musoft.de>
+Mickey Lauer <mickey@Vanille.de>
+Richard Purdie <rpurdie@rpsys.net>
+Holger Schurig <holgerschurig@gmx.de>

bitbake/ChangeLog

@@ -0,0 +1,317 @@
+Changes in Bitbake 1.9.x:
+	- Add PE (Package Epoch) support from Philipp Zabel (pH5)
+	- Treat python functions the same as shell functions for logging
+	- Use TMPDIR/anonfunc as a __anonfunc temp directory (T)
+	- Catch truncated cache file errors
+	- Allow operations other than assignment on flag variables
+	- Add code to handle inter-task dependencies
+	- Fix cache errors when generation dotGraphs
+	- Make sure __inherit_cache is updated before calling include() (from Michael Krelin)
+	- Fix bug when target was in ASSUME_PROVIDED (#2236)
+	- Raise ParseError for filenames with multiple underscores instead of infinitely looping (#2062)
+	- Fix invalid regexp in BBMASK error handling (missing import) (#1124)
+	- Promote certain warnings from debug to note 2 level
+	- Update manual
+	- Correctly redirect stdin when forking
+	- If parsing errors are found, exit, too many users miss the errors
+	- Remove supriours PREFERRED_PROVIDER warnings
+	- svn fetcher: Add _buildsvncommand function
+	- Improve certain error messages
+	- Rewrite svn fetcher to make adding extra operations easier 
+	  as part of future SRCDATE="now" fixes
+	  (requires new FETCHCMD_svn definition in bitbake.conf)
+	- Change SVNDIR layout to be more unique (fixes #2644 and #2624)
+	- Add ConfigParsed Event after configuration parsing is complete
+	- Add SRCREV support for svn fetcher
+	- data.emit_var() - only call getVar if we need the variable
+	- Stop generating the A variable (seems to be legacy code)
+	- Make sure intertask depends get processed correcting in recursive depends
+	- Add pn-PN to overrides when evaluating PREFERRED_VERSION
+	- Improve the progress indicator by skipping tasks that have 
+	  already run before starting the build rather than during it
+	- Add profiling option (-P)
+	- Add BB_SRCREV_POLICY variable (clear or cache) to control SRCREV cache
+	- Add SRCREV_FORMAT support
+	- Fix local fetcher's localpath return values
+	- Apply OVERRIDES before performing immediate expansions
+	- Allow the -b -e option combination to take regular expressions
+	- Fix handling of variables with expansion in the name using _append/_prepend
+	  e.g. RRECOMMENDS_${PN}_append_xyz = "abc"
+	- Add plain message function to bb.msg
+	- Sort the list of providers before processing so dependency problems are 
+	  reproducible rather than effectively random
+	- Fix/improve bitbake -s output
+	- Add locking for fetchers so only one tries to fetch a given file at a given time
+	- Fix int(0)/None confusion in runqueue.py which causes random gaps in dependency chains	  
+	- Expand data in addtasks
+	- Print the list of missing DEPENDS,RDEPENDS for the "No buildable providers available for required...."
+	  error message.
+	- Rework add_task to be more efficient (6% speedup, 7% number of function calls reduction)
+	- Sort digraph output to make builds more reproducible
+	- Split expandKeys into two for loops to benefit from the expand_cache (12% speedup)
+	- runqueue.py: Fix idepends handling to avoid dependency errors
+	- Clear the terminal TOSTOP flag if set (and warn the user)
+	- Fix regression from r653 and make SRCDATE/CVSDATE work for packages again
+	- Fix a bug in bb.decodeurl where http://some.where.com/somefile.tgz decoded to host="" (#1530)
+	- Warn about malformed PREFERRED_PROVIDERS (#1072)
+	- Add support for BB_NICE_LEVEL option (#1627)
+	- Psyco is used only on x86 as there is no support for other architectures.
+	- Sort initial providers list by default preference (#1145, #2024)
+	- Improve provider sorting so prefered versions have preference over latest versions (#768)
+	- Detect builds of tasks with overlapping providers and warn (will become a fatal error) (#1359)
+	- Add MULTI_PROVIDER_WHITELIST variable to allow known safe multiple providers to be listed
+	- Handle paths in svn fetcher module parameter
+	- Support the syntax "export VARIABLE"
+	- Add bzr fetcher
+	- Add support for cleaning directories before a task in the form:
+	  do_taskname[cleandirs] = "dir"
+	- bzr fetcher tweaks from Robert Schuster (#2913)
+	- Add mercurial (hg) fetcher from Robert Schuster (#2913)
+	- Don't add duplicates to BBPATH
+	- Fix preferred_version return values (providers.py)
+	- Fix 'depends' flag splitting
+	- Fix unexport handling (#3135)
+	- Add bb.copyfile function similar to bb.movefile (and improve movefile error reporting)
+	- Allow multiple options for deptask flag
+	- Use git-fetch instead of git-pull removing any need for merges when 
+	  fetching (we don't care about the index). Fixes fetch errors.
+	- Add BB_GENERATE_MIRROR_TARBALLS option, set to 0 to make git fetches 
+	  faster at the expense of not creating mirror tarballs.
+	- SRCREV handling updates, improvements and fixes from Poky
+	- Add bb.utils.lockfile() and bb.utils.unlockfile() from Poky
+	- Add support for task selfstamp and lockfiles flags
+	- Disable task number acceleration since it can allow the tasks to run 
+	  out of sequence
+	- Improve runqueue code comments
+	- Add task scheduler abstraction and some example schedulers
+	- Improve circular dependency chain debugging code and user feedback
+	- Don't give a stacktrace for invalid tasks, have a user friendly message (#3431)
+	- Add support for "-e target" (#3432)
+	- Fix shell showdata command (#3259)
+	- Fix shell data updating problems (#1880)
+	- Properly raise errors for invalid source URI protocols
+	- Change the wget fetcher failure handling to avoid lockfile problems
+	- Add support for branches in git fetcher (Otavio Salvador, Michael Lauer)
+	- Make taskdata and runqueue errors more user friendly
+	- Add norecurse and fullpath options to cvs fetcher
+	- Fix exit code for build failures in --continue mode
+	- Fix git branch tags fetching
+	- Change parseConfigurationFile so it works on real data, not a copy
+	- Handle 'base' inherit and all other INHERITs from parseConfigurationFile 
+	  instead of BBHandler
+	- Fix getVarFlags bug in data_smart
+	- Optmise cache handling by more quickly detecting an invalid cache, only 
+	  saving the cache when its changed, moving the cache validity check into
+	  the parsing loop and factoring some getVar calls outside a for loop
+	- Cooker: Remove a debug message from the parsing loop to lower overhead
+	- Convert build.py exec_task to use getVarFlags
+	- Update shell to use cooker.buildFile
+	- Add StampUpdate event
+	- Convert -b option to use taskdata/runqueue
+	- Remove digraph and switch to new stamp checking code. exec_task no longer
+	  honours dependencies
+	- Make fetcher timestamp updating non-fatal when permissions don't allow 
+	  updates
+	- Add BB_SCHEDULER variable/option ("completion" or "speed") controlling
+	  the way bitbake schedules tasks
+	- Add BB_STAMP_POLICY variable/option ("perfile" or "full") controlling
+	  how extensively stamps are looked at for validity
+	- When handling build target failures make sure idepends are checked and
+	  failed where needed. Fixes --continue mode crashes.
+	- Fix -f (force) in conjunction with -b
+	- Fix problems with recrdeptask handling where some idepends weren't handled
+	  correctly.
+	- Handle exit codes correctly (from pH5)
+	- Work around refs/HEAD issues with git over http (#3410)
+	- Add proxy support to the CVS fetcher (from Cyril Chemparathy)
+	- Improve runfetchcmd so errors are seen and various GIT variables are exported
+	- Add ability to fetchers to check URL validity without downloading
+	- Improve runtime PREFERRED_PROVIDERS warning message
+	- Add BB_STAMP_WHITELIST option which contains a list of stamps to ignore when
+	  checking stamp dependencies and using a BB_STAMP_POLICY of "whitelist"
+	- No longer weight providers on the basis of a package being "already staged". This
+	  leads to builds being non-deterministic.
+	- Flush stdout/stderr before forking to fix duplicate console output
+	- Make sure recrdeps tasks include all inter-task dependencies of a given fn
+	- Add bb.runqueue.check_stamp_fn() for use by packaged-staging
+	- Add PERSISTENT_DIR to store the PersistData in a persistent
+	  directory != the cache dir.
+	- Add md5 and sha256 checksum generation functions to utils.py
+	- Correctly handle '-' characters in class names (#2958)
+	- Make sure expandKeys has been called on the data dictionary before running tasks
+	- Correctly add a task override in the form task-TASKNAME.
+	- Revert the '-' character fix in class names since it breaks things
+	- When a regexp fails to compile for PACKAGES_DYNAMIC, print a more useful error (#4444)
+	- Allow to checkout CVS by Date and Time. Just add HHmm to the SRCDATE.
+	- Move prunedir function to utils.py and add explode_dep_versions function
+	- Raise an exception if SRCREV == 'INVALID'
+	- Fix hg fetcher username/password handling and fix crash
+	- Fix PACKAGES_DYNAMIC handling of packages with '++' in the name
+	- Rename __depends to __base_depends after configuration parsing so we don't
+	  recheck the validity of the config files time after time
+	- Add better environmental variable handling. By default it will now only pass certain 
+	  whitelisted variables into the data store. If BB_PRESERVE_ENV is set bitbake will use
+	  all variable from the environment. If BB_ENV_WHITELIST is set, that whitelist will be
+	  used instead of the internal bitbake one. Alternatively, BB_ENV_EXTRAWHITE can be used
+	  to extend the internal whitelist.
+	- Perforce fetcher fix to use commandline options instead of being overriden by the environment
+	- bb.utils.prunedir can cope with symlinks to directoriees without exceptions
+	- use @rev when doing a svn checkout
+	- Add osc fetcher (from Joshua Lock in Poky)
+	- When SRCREV autorevisioning for a recipe is in use, don't cache the recipe
+	- Add tryaltconfigs option to control whether bitbake trys using alternative providers
+	  to fulfil failed dependencies. It defaults to off, changing the default since this
+	  behaviour confuses many users and isn't often useful.
+	- Improve lock file function error handling
+	- Add username handling to the git fetcher (Robert Bragg)
+	- Add support for HTTP_PROXY and HTTP_PROXY_IGNORE variables to the wget fetcher
+	- Export more variables to the fetcher commands to allow ssh checkouts and checkouts through 
+	  proxies to work better. (from Poky)
+	- Also allow user and pswd options in SRC_URIs globally (from Poky)
+	- Improve proxy handling when using mirrors (from Poky)
+	- Add bb.utils.prune_suffix function
+	- Fix hg checkouts of specific revisions (from Poky)
+	- Fix wget fetching of urls with parameters specified (from Poky)
+	- Add username handling to git fetcher (from Poky)
+	- Set HOME environmental variable when running fetcher commands (from Poky)
+	- Make sure allowed variables inherited from the environment are exported again (from Poky)
+	- When running a stage task in bbshell, run populate_staging, not the stage task (from Poky)
+	- Fix + character escaping from PACKAGES_DYNAMIC (thanks Otavio Salvador)
+	- Addition of BBCLASSEXTEND support for allowing one recipe to provide multiple targets (from Poky)
+
+Changes in Bitbake 1.8.0:
+	- Release 1.7.x as a stable series
+
+Changes in BitBake 1.7.x:
+	- Major updates of the dependency handling and execution
+	  of tasks. Code from bin/bitbake replaced with runqueue.py
+	  and taskdata.py
+	- New task execution code supports multithreading with a simplistic
+	  threading algorithm controlled by BB_NUMBER_THREADS
+	- Change of the SVN Fetcher to keep the checkout around
+	  courtsey of Paul Sokolovsky (#1367)
+	- PATH fix to bbimage (#1108)
+	- Allow debug domains to be specified on the commandline (-l)
+	- Allow 'interactive' tasks
+	- Logging message improvements
+	- Drop now uneeded BUILD_ALL_DEPS variable
+	- Add support for wildcards to -b option
+	- Major overhaul of the fetchers making a large amount of code common
+	  including mirroring code
+	- Fetchers now touch md5 stamps upon access (to show activity)
+	- Fix -f force option when used without -b (long standing bug)
+	- Add expand_cache to data_cache.py, caching expanded data (speedup)
+	- Allow version field in DEPENDS (ignored for now)
+	- Add abort flag support to the shell
+	- Make inherit fail if the class doesn't exist (#1478)
+	- Fix data.emit_env() to expand keynames as well as values
+	- Add ssh fetcher
+	- Add perforce fetcher
+	- Make PREFERRED_PROVIDER_foobar defaults to foobar if available
+	- Share the parser's mtime_cache, reducing the number of stat syscalls
+	- Compile all anonfuncs at once! 
+	  *** Anonfuncs must now use common spacing format ***
+	- Memorise the list of handlers in __BBHANDLERS and tasks in __BBTASKS
+	  This removes 2 million function calls resulting in a 5-10% speedup
+	- Add manpage
+	- Update generateDotGraph to use taskData/runQueue improving accuracy
+	  and also adding a task dependency graph
+	- Fix/standardise on GPLv2 licence
+	- Move most functionality from bin/bitbake to cooker.py and split into
+	  separate funcitons
+	- CVS fetcher: Added support for non-default port
+	- Add BBINCLUDELOGS_LINES, the number of lines to read from any logfile
+	- Drop shebangs from lib/bb scripts
+
+Changes in Bitbake 1.6.0:
+	- Better msg handling
+	- COW dict implementation from Tim Ansell (mithro) leading
+	  to better performance
+	- Speed up of -s
+
+Changes in Bitbake 1.4.4:
+	- SRCDATE now handling courtsey Justin Patrin
+	- #1017 fix to work with rm_work
+
+Changes in BitBake 1.4.2:
+	- Send logs to oe.pastebin.com instead of pastebin.com
+	  fixes #856
+	- Copy the internal bitbake data before building the
+	  dependency graph. This fixes nano not having a
+	  virtual/libc dependency
+	- Allow multiple TARBALL_STASH entries
+	- Cache, check if the directory exists before changing
+	  into it
+	- git speedup cloning by not doing a checkout
+	- allow to have spaces in filenames (.conf, .bb, .bbclass)
+
+Changes in BitBake 1.4.0:
+	- Fix to check both RDEPENDS and RDEPENDS_${PN}
+	- Fix a RDEPENDS parsing bug in utils:explode_deps()
+	- Update git fetcher behaviour to match git changes
+	- ASSUME_PROVIDED allowed to include runtime packages
+	- git fetcher cleanup and efficency improvements
+	- Change the format of the cache
+	- Update usermanual to document the Fetchers
+	- Major changes to caching with a new strategy
+	  giving a major performance increase when reparsing
+	  with few data changes
+
+Changes in BitBake 1.3.3:
+	- Create a new Fetcher module to ease the
+	  development of new Fetchers.
+	  Issue #438 fixed by rpurdie@openedhand.com
+	- Make the Subversion fetcher honor the SRC Date
+	  (CVSDATE).
+	  Issue #555 fixed by chris@openedhand.com
+	- Expand PREFERRED_PROVIDER properly
+	  Issue #436 fixed by rprudie@openedhand.com
+	- Typo fix for Issue #531 by Philipp Zabel for the
+	  BitBake Shell
+	- Introduce a new special variable SRCDATE as
+	  a generic naming to replace CVSDATE.
+	- Introduce a new keyword 'required'. In contrast
+	  to 'include' parsing will fail if a to be included
+	  file can not be found.
+	- Remove hardcoding of the STAMP directory. Patch
+	  courtsey pHilipp Zabel
+	- Track the RDEPENDS of each package (rpurdie@openedhand.com)
+	- Introduce BUILD_ALL_DEPS to build all RDEPENDS. E.g
+	  this is used by the OpenEmbedded Meta Packages.
+	  (rpurdie@openedhand.com).
+
+Changes in BitBake 1.3.2:
+	- reintegration of make.py into BitBake
+	- bbread is gone, use bitbake -e
+	- lots of shell updates and bugfixes
+	- Introduction of the .= and =. operator
+	- Sort variables, keys and groups in bitdoc
+	- Fix regression in the handling of BBCOLLECTIONS
+	- Update the bitbake usermanual
+
+Changes in BitBake 1.3.0:
+	- add bitbake interactive shell (bitbake -i)
+	- refactor bitbake utility in OO style
+	- kill default arguments in methods in the bb.data module
+	- kill default arguments in methods in the bb.fetch module
+	- the http/https/ftp fetcher will fail if the to be 
+	  downloaded file was not found in DL_DIR (this is needed
+	  to avoid unpacking the sourceforge mirror page)
+	- Switch to a cow like data instance for persistent and non
+	  persisting mode (called data_smart.py)
+	- Changed the callback of bb.make.collect_bbfiles to carry
+	  additional parameters
+	- Drastically reduced the amount of needed RAM by not holding
+	  each data instance in memory when using a cache/persistent
+	  storage
+
+Changes in BitBake 1.2.1:
+	The 1.2.1 release is meant as a intermediate release to lay the
+	ground for more radical changes. The most notable changes are:
+
+	- Do not hardcode {}, use bb.data.init() instead if you want to
+	  get a instance of a data class
+	- bb.data.init() is a factory and the old bb.data methods are delegates
+	- Do not use deepcopy use bb.data.createCopy() instead.
+	- Removed default arguments in bb.fetch
+

bitbake/LICENSE

@@ -0,0 +1,29 @@
+BitBake is licensed under the GNU General Public License version 2.0. See 
+LICENSE.GPL-2.0-only for further details.
+
+Individual files contain the following style tags instead of the full license text:
+
+    SPDX-License-Identifier:	GPL-2.0-only
+
+This enables machine processing of license information based on the SPDX
+License Identifiers that are here available: http://spdx.org/licenses/
+
+
+The following external components are distributed with this software:
+
+* The Toaster Simple UI application is based upon the Django project template, the files of which are covered by the BSD license and are copyright (c) Django Software
+Foundation and individual contributors.
+
+* Twitter Bootstrap (including Glyphicons), redistributed under the MIT license
+* jQuery is redistributed under the MIT license.
+
+* Twitter typeahead.js redistributed under the MIT license. Note that the JS source has one small modification, so the full unminified file is currently included to make it obvious where this is.
+
+* jsrender is redistributed under the MIT license.
+
+* QUnit is redistributed under the MIT license.
+
+* Font Awesome fonts redistributed under the SIL Open Font License 1.1
+
+* simplediff is distributed under the zlib license.
+

bitbake/LICENSE.GPL-2.0-only

@@ -0,0 +1,288 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
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+
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+(2) offer you this license which gives you legal permission to copy,
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+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
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+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
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+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
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+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+Note:
+Individual files contain the following tag instead of the full license text.
+
+    SPDX-License-Identifier: GPL-2.0-only
+
+This enables machine processing of license information based on the SPDX
+License Identifiers that are here available: http://spdx.org/licenses/

bitbake/LICENSE.MIT

@@ -0,0 +1,25 @@
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+Note:
+Individual files contain the following tag instead of the full license text.
+
+    SPDX-License-Identifier: MIT
+
+This enables machine processing of license information based on the SPDX
+License Identifiers that are here available: http://spdx.org/licenses/

bitbake/README

@@ -0,0 +1,56 @@
+Bitbake
+=======
+
+BitBake is a generic task execution engine that allows shell and Python tasks to be run
+efficiently and in parallel while working within complex inter-task dependency constraints.
+One of BitBake's main users, OpenEmbedded, takes this core and builds embedded Linux software
+stacks using a task-oriented approach.
+
+For information about Bitbake, see the OpenEmbedded website:
+    https://www.openembedded.org/
+
+Bitbake plain documentation can be found under the doc directory or its integrated
+html version at the Yocto Project website:
+    https://docs.yoctoproject.org
+
+Bitbake requires Python version 3.8 or newer.
+
+Contributing
+------------
+
+Please refer to
+https://www.openembedded.org/wiki/How_to_submit_a_patch_to_OpenEmbedded
+for guidelines on how to submit patches, just note that the latter documentation is intended
+for OpenEmbedded (and its core) not bitbake patches (bitbake-devel@lists.openembedded.org)
+but in general main guidelines apply. Once the commit(s) have been created, the way to send
+the patch is through git-send-email. For example, to send the last commit (HEAD) on current
+branch, type:
+
+    git send-email -M -1 --to bitbake-devel@lists.openembedded.org
+
+Mailing list:
+
+    https://lists.openembedded.org/g/bitbake-devel
+
+Source code:
+
+    https://git.openembedded.org/bitbake/
+
+Testing
+-------
+
+Bitbake has a testsuite located in lib/bb/tests/ whichs aim to try and prevent regressions.
+You can run this with "bitbake-selftest". In particular the fetcher is well covered since
+it has so many corner cases. The datastore has many tests too. Testing with the testsuite is
+recommended before submitting patches, particularly to the fetcher and datastore. We also
+appreciate new test cases and may require them for more obscure issues.
+
+To run the tests "zstd" and "git" must be installed. Git must be correctly configured, in
+particular the user.email and user.name values must be set.
+
+The assumption is made that this testsuite is run from an initialized OpenEmbedded build
+environment (i.e. `source oe-init-build-env` is used). If this is not the case, run the
+testsuite as follows:
+
+    export PATH=$(pwd)/bin:$PATH
+    bin/bitbake-selftest

bitbake/bin/bitbake

@@ -0,0 +1,45 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2003, 2004  Chris Larson
+# Copyright (C) 2003, 2004  Phil Blundell
+# Copyright (C) 2003 - 2005 Michael 'Mickey' Lauer
+# Copyright (C) 2005        Holger Hans Peter Freyther
+# Copyright (C) 2005        ROAD GmbH
+# Copyright (C) 2006        Richard Purdie
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import os
+import sys
+import warnings
+warnings.simplefilter("default")
+
+sys.path.insert(0, os.path.join(os.path.dirname(os.path.dirname(__file__)),
+                                'lib'))
+try:
+    import bb
+except RuntimeError as exc:
+    sys.exit(str(exc))
+
+from bb import cookerdata
+from bb.main import bitbake_main, BitBakeConfigParameters, BBMainException
+
+bb.utils.check_system_locale()
+
+__version__ = "2.4.0"
+
+if __name__ == "__main__":
+    if __version__ != bb.__version__:
+        sys.exit("Bitbake core version and program version mismatch!")
+    try:
+        sys.exit(bitbake_main(BitBakeConfigParameters(sys.argv),
+                              cookerdata.CookerConfiguration()))
+    except BBMainException as err:
+        sys.exit(err)
+    except bb.BBHandledException:
+        sys.exit(1)
+    except Exception:
+        import traceback
+        traceback.print_exc()
+        sys.exit(1)

bitbake/bin/bitbake-diffsigs

@@ -0,0 +1,204 @@
+#!/usr/bin/env python3
+
+# bitbake-diffsigs / bitbake-dumpsig
+# BitBake task signature data dump and comparison utility
+#
+# Copyright (C) 2012-2013, 2017 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import os
+import sys
+import warnings
+
+warnings.simplefilter("default")
+import argparse
+import logging
+import pickle
+
+sys.path.insert(0, os.path.join(os.path.dirname(os.path.dirname(sys.argv[0])), 'lib'))
+
+import bb.tinfoil
+import bb.siggen
+import bb.msg
+
+myname = os.path.basename(sys.argv[0])
+logger = bb.msg.logger_create(myname)
+
+is_dump = myname == 'bitbake-dumpsig'
+
+
+def find_siginfo(tinfoil, pn, taskname, sigs=None):
+    result = None
+    tinfoil.set_event_mask(['bb.event.FindSigInfoResult',
+                            'logging.LogRecord',
+                            'bb.command.CommandCompleted',
+                            'bb.command.CommandFailed'])
+    ret = tinfoil.run_command('findSigInfo', pn, taskname, sigs)
+    if ret:
+        while True:
+            event = tinfoil.wait_event(1)
+            if event:
+                if isinstance(event, bb.command.CommandCompleted):
+                    break
+                elif isinstance(event, bb.command.CommandFailed):
+                    logger.error(str(event))
+                    sys.exit(2)
+                elif isinstance(event, bb.event.FindSigInfoResult):
+                    result = event.result
+                elif isinstance(event, logging.LogRecord):
+                    logger.handle(event)
+    else:
+        logger.error('No result returned from findSigInfo command')
+        sys.exit(2)
+    return result
+
+
+def find_siginfo_task(bbhandler, pn, taskname, sig1=None, sig2=None):
+    """ Find the most recent signature files for the specified PN/task """
+
+    if not taskname.startswith('do_'):
+        taskname = 'do_%s' % taskname
+
+    if sig1 and sig2:
+        sigfiles = find_siginfo(bbhandler, pn, taskname, [sig1, sig2])
+        if not sigfiles:
+            logger.error('No sigdata files found matching %s %s matching either %s or %s' % (pn, taskname, sig1, sig2))
+            sys.exit(1)
+        elif sig1 not in sigfiles:
+            logger.error('No sigdata files found matching %s %s with signature %s' % (pn, taskname, sig1))
+            sys.exit(1)
+        elif sig2 not in sigfiles:
+            logger.error('No sigdata files found matching %s %s with signature %s' % (pn, taskname, sig2))
+            sys.exit(1)
+        latestfiles = [sigfiles[sig1], sigfiles[sig2]]
+    else:
+        filedates = find_siginfo(bbhandler, pn, taskname)
+        latestfiles = sorted(filedates.keys(), key=lambda f: filedates[f])[-2:]
+        if not latestfiles:
+            logger.error('No sigdata files found matching %s %s' % (pn, taskname))
+            sys.exit(1)
+
+    return latestfiles
+
+
+# Define recursion callback
+def recursecb(key, hash1, hash2):
+    hashes = [hash1, hash2]
+    hashfiles = find_siginfo(tinfoil, key, None, hashes)
+
+    recout = []
+    if not hashfiles:
+        recout.append("Unable to find matching sigdata for %s with hashes %s or %s" % (key, hash1, hash2))
+    elif hash1 not in hashfiles:
+        recout.append("Unable to find matching sigdata for %s with hash %s" % (key, hash1))
+    elif hash2 not in hashfiles:
+        recout.append("Unable to find matching sigdata for %s with hash %s" % (key, hash2))
+    else:
+        out2 = bb.siggen.compare_sigfiles(hashfiles[hash1], hashfiles[hash2], recursecb, color=color)
+        for change in out2:
+            for line in change.splitlines():
+                recout.append('    ' + line)
+
+    return recout
+
+
+parser = argparse.ArgumentParser(
+    description=("Dumps" if is_dump else "Compares") + " siginfo/sigdata files written out by BitBake")
+
+parser.add_argument('-D', '--debug',
+                    help='Enable debug output',
+                    action='store_true')
+
+if is_dump:
+    parser.add_argument("-t", "--task",
+                        help="find the signature data file for the last run of the specified task",
+                        action="store", dest="taskargs", nargs=2, metavar=('recipename', 'taskname'))
+
+    parser.add_argument("sigdatafile1",
+                        help="Signature file to dump. Not used when using -t/--task.",
+                        action="store", nargs='?', metavar="sigdatafile")
+else:
+    parser.add_argument('-c', '--color',
+                        help='Colorize the output (where %(metavar)s is %(choices)s)',
+                        choices=['auto', 'always', 'never'], default='auto', metavar='color')
+
+    parser.add_argument('-d', '--dump',
+                        help='Dump the last signature data instead of comparing (equivalent to using bitbake-dumpsig)',
+                        action='store_true')
+
+    parser.add_argument("-t", "--task",
+                        help="find the signature data files for the last two runs of the specified task and compare them",
+                        action="store", dest="taskargs", nargs=2, metavar=('recipename', 'taskname'))
+
+    parser.add_argument("-s", "--signature",
+                        help="With -t/--task, specify the signatures to look for instead of taking the last two",
+                        action="store", dest="sigargs", nargs=2, metavar=('fromsig', 'tosig'))
+
+    parser.add_argument("sigdatafile1",
+                        help="First signature file to compare (or signature file to dump, if second not specified). Not used when using -t/--task.",
+                        action="store", nargs='?')
+
+    parser.add_argument("sigdatafile2",
+                        help="Second signature file to compare",
+                        action="store", nargs='?')
+
+options = parser.parse_args()
+if is_dump:
+    options.color = 'never'
+    options.dump = True
+    options.sigdatafile2 = None
+    options.sigargs = None
+
+if options.debug:
+    logger.setLevel(logging.DEBUG)
+
+color = (options.color == 'always' or (options.color == 'auto' and sys.stdout.isatty()))
+
+if options.taskargs:
+    with bb.tinfoil.Tinfoil() as tinfoil:
+        tinfoil.prepare(config_only=True)
+        if not options.dump and options.sigargs:
+            files = find_siginfo_task(tinfoil, options.taskargs[0], options.taskargs[1], options.sigargs[0],
+                                      options.sigargs[1])
+        else:
+            files = find_siginfo_task(tinfoil, options.taskargs[0], options.taskargs[1])
+
+        if options.dump:
+            logger.debug("Signature file: %s" % files[-1])
+            output = bb.siggen.dump_sigfile(files[-1])
+        else:
+            if len(files) < 2:
+                logger.error('Only one matching sigdata file found for the specified task (%s %s)' % (
+                    options.taskargs[0], options.taskargs[1]))
+                sys.exit(1)
+
+            # Recurse into signature comparison
+            logger.debug("Signature file (previous): %s" % files[-2])
+            logger.debug("Signature file (latest): %s" % files[-1])
+            output = bb.siggen.compare_sigfiles(files[-2], files[-1], recursecb, color=color)
+else:
+    if options.sigargs:
+        logger.error('-s/--signature can only be used together with -t/--task')
+        sys.exit(1)
+    try:
+        if not options.dump and options.sigdatafile1 and options.sigdatafile2:
+            with bb.tinfoil.Tinfoil() as tinfoil:
+                tinfoil.prepare(config_only=True)
+                output = bb.siggen.compare_sigfiles(options.sigdatafile1, options.sigdatafile2, recursecb, color=color)
+        elif options.sigdatafile1:
+            output = bb.siggen.dump_sigfile(options.sigdatafile1)
+        else:
+            logger.error('Must specify signature file(s) or -t/--task')
+            parser.print_help()
+            sys.exit(1)
+    except IOError as e:
+        logger.error(str(e))
+        sys.exit(1)
+    except (pickle.UnpicklingError, EOFError):
+        logger.error('Invalid signature data - ensure you are specifying sigdata/siginfo files')
+        sys.exit(1)
+
+if output:
+    print('\n'.join(output))

bitbake/bin/bitbake-dumpsig

@@ -0,0 +1 @@
+bitbake-diffsigs

bitbake/bin/bitbake-getvar

@@ -0,0 +1,51 @@
+#! /usr/bin/env python3
+#
+# Copyright (C) 2021 Richard Purdie
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import argparse
+import io
+import os
+import sys
+import warnings
+warnings.simplefilter("default")
+
+bindir = os.path.dirname(__file__)
+topdir = os.path.dirname(bindir)
+sys.path[0:0] = [os.path.join(topdir, 'lib')]
+
+import bb.tinfoil
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description="Bitbake Query Variable")
+    parser.add_argument("variable", help="variable name to query")
+    parser.add_argument("-r", "--recipe", help="Recipe name to query", default=None, required=False)
+    parser.add_argument('-u', '--unexpand', help='Do not expand the value (with --value)', action="store_true")
+    parser.add_argument('-f', '--flag', help='Specify a variable flag to query (with --value)', default=None)
+    parser.add_argument('--value', help='Only report the value, no history and no variable name', action="store_true")
+    parser.add_argument('-q', '--quiet', help='Silence bitbake server logging', action="store_true")
+    args = parser.parse_args()
+
+    if args.unexpand and not args.value:
+        print("--unexpand only makes sense with --value")
+        sys.exit(1)
+
+    if args.flag and not args.value:
+        print("--flag only makes sense with --value")
+        sys.exit(1)
+
+    with bb.tinfoil.Tinfoil(tracking=True, setup_logging=not args.quiet) as tinfoil:
+        if args.recipe:
+            tinfoil.prepare(quiet=2)
+            d = tinfoil.parse_recipe(args.recipe)
+        else:
+            tinfoil.prepare(quiet=2, config_only=True)
+            d = tinfoil.config_data
+        if args.flag:
+            print(str(d.getVarFlag(args.variable, args.flag, expand=(not args.unexpand))))
+        elif args.value:
+            print(str(d.getVar(args.variable, expand=(not args.unexpand))))
+        else:
+            bb.data.emit_var(args.variable, d=d, all=True)

bitbake/bin/bitbake-hashclient

@@ -0,0 +1,169 @@
+#! /usr/bin/env python3
+#
+# Copyright (C) 2019 Garmin Ltd.
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import argparse
+import hashlib
+import logging
+import os
+import pprint
+import sys
+import threading
+import time
+import warnings
+warnings.simplefilter("default")
+
+try:
+    import tqdm
+    ProgressBar = tqdm.tqdm
+except ImportError:
+    class ProgressBar(object):
+        def __init__(self, *args, **kwargs):
+            pass
+
+        def __enter__(self):
+            return self
+
+        def __exit__(self, *args, **kwargs):
+            pass
+
+        def update(self):
+            pass
+
+sys.path.insert(0, os.path.join(os.path.dirname(os.path.dirname(__file__)), 'lib'))
+
+import hashserv
+
+DEFAULT_ADDRESS = 'unix://./hashserve.sock'
+METHOD = 'stress.test.method'
+
+
+def main():
+    def handle_stats(args, client):
+        if args.reset:
+            s = client.reset_stats()
+        else:
+            s = client.get_stats()
+        pprint.pprint(s)
+        return 0
+
+    def handle_stress(args, client):
+        def thread_main(pbar, lock):
+            nonlocal found_hashes
+            nonlocal missed_hashes
+            nonlocal max_time
+
+            client = hashserv.create_client(args.address)
+
+            for i in range(args.requests):
+                taskhash = hashlib.sha256()
+                taskhash.update(args.taskhash_seed.encode('utf-8'))
+                taskhash.update(str(i).encode('utf-8'))
+
+                start_time = time.perf_counter()
+                l = client.get_unihash(METHOD, taskhash.hexdigest())
+                elapsed = time.perf_counter() - start_time
+
+                with lock:
+                    if l:
+                        found_hashes += 1
+                    else:
+                        missed_hashes += 1
+
+                    max_time = max(elapsed, max_time)
+                    pbar.update()
+
+        max_time = 0
+        found_hashes = 0
+        missed_hashes = 0
+        lock = threading.Lock()
+        total_requests = args.clients * args.requests
+        start_time = time.perf_counter()
+        with ProgressBar(total=total_requests) as pbar:
+            threads = [threading.Thread(target=thread_main, args=(pbar, lock), daemon=False) for _ in range(args.clients)]
+            for t in threads:
+                t.start()
+
+            for t in threads:
+                t.join()
+
+        elapsed = time.perf_counter() - start_time
+        with lock:
+            print("%d requests in %.1fs. %.1f requests per second" % (total_requests, elapsed, total_requests / elapsed))
+            print("Average request time %.8fs" % (elapsed / total_requests))
+            print("Max request time was %.8fs" % max_time)
+            print("Found %d hashes, missed %d" % (found_hashes, missed_hashes))
+
+        if args.report:
+            with ProgressBar(total=args.requests) as pbar:
+                for i in range(args.requests):
+                    taskhash = hashlib.sha256()
+                    taskhash.update(args.taskhash_seed.encode('utf-8'))
+                    taskhash.update(str(i).encode('utf-8'))
+
+                    outhash = hashlib.sha256()
+                    outhash.update(args.outhash_seed.encode('utf-8'))
+                    outhash.update(str(i).encode('utf-8'))
+
+                    client.report_unihash(taskhash.hexdigest(), METHOD, outhash.hexdigest(), taskhash.hexdigest())
+
+                    with lock:
+                        pbar.update()
+
+    parser = argparse.ArgumentParser(description='Hash Equivalence Client')
+    parser.add_argument('--address', default=DEFAULT_ADDRESS, help='Server address (default "%(default)s")')
+    parser.add_argument('--log', default='WARNING', help='Set logging level')
+
+    subparsers = parser.add_subparsers()
+
+    stats_parser = subparsers.add_parser('stats', help='Show server stats')
+    stats_parser.add_argument('--reset', action='store_true',
+                              help='Reset server stats')
+    stats_parser.set_defaults(func=handle_stats)
+
+    stress_parser = subparsers.add_parser('stress', help='Run stress test')
+    stress_parser.add_argument('--clients', type=int, default=10,
+                               help='Number of simultaneous clients')
+    stress_parser.add_argument('--requests', type=int, default=1000,
+                               help='Number of requests each client will perform')
+    stress_parser.add_argument('--report', action='store_true',
+                               help='Report new hashes')
+    stress_parser.add_argument('--taskhash-seed', default='',
+                               help='Include string in taskhash')
+    stress_parser.add_argument('--outhash-seed', default='',
+                               help='Include string in outhash')
+    stress_parser.set_defaults(func=handle_stress)
+
+    args = parser.parse_args()
+
+    logger = logging.getLogger('hashserv')
+
+    level = getattr(logging, args.log.upper(), None)
+    if not isinstance(level, int):
+        raise ValueError('Invalid log level: %s' % args.log)
+
+    logger.setLevel(level)
+    console = logging.StreamHandler()
+    console.setLevel(level)
+    logger.addHandler(console)
+
+    func = getattr(args, 'func', None)
+    if func:
+        client = hashserv.create_client(args.address)
+
+        return func(args, client)
+
+    return 0
+
+
+if __name__ == '__main__':
+    try:
+        ret = main()
+    except Exception:
+        ret = 1
+        import traceback
+        traceback.print_exc()
+    sys.exit(ret)

bitbake/bin/bitbake-hashserv

@@ -0,0 +1,66 @@
+#! /usr/bin/env python3
+#
+# Copyright (C) 2018 Garmin Ltd.
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import os
+import sys
+import logging
+import argparse
+import sqlite3
+import warnings
+warnings.simplefilter("default")
+
+sys.path.insert(0, os.path.join(os.path.dirname(os.path.dirname(__file__)), 'lib'))
+
+import hashserv
+
+VERSION = "1.0.0"
+
+DEFAULT_BIND = 'unix://./hashserve.sock'
+
+
+def main():
+    parser = argparse.ArgumentParser(description='Hash Equivalence Reference Server. Version=%s' % VERSION,
+                                     epilog='''The bind address is the path to a unix domain socket if it is
+                                               prefixed with "unix://". Otherwise, it is an IP address
+                                               and port in form ADDRESS:PORT. To bind to all addresses, leave
+                                               the ADDRESS empty, e.g. "--bind :8686". To bind to a specific
+                                               IPv6 address, enclose the address in "[]", e.g.
+                                               "--bind [::1]:8686"'''
+                                     )
+
+    parser.add_argument('-b', '--bind', default=DEFAULT_BIND, help='Bind address (default "%(default)s")')
+    parser.add_argument('-d', '--database', default='./hashserv.db', help='Database file (default "%(default)s")')
+    parser.add_argument('-l', '--log', default='WARNING', help='Set logging level')
+    parser.add_argument('-u', '--upstream', help='Upstream hashserv to pull hashes from')
+    parser.add_argument('-r', '--read-only', action='store_true', help='Disallow write operations from clients')
+
+    args = parser.parse_args()
+
+    logger = logging.getLogger('hashserv')
+
+    level = getattr(logging, args.log.upper(), None)
+    if not isinstance(level, int):
+        raise ValueError('Invalid log level: %s' % args.log)
+
+    logger.setLevel(level)
+    console = logging.StreamHandler()
+    console.setLevel(level)
+    logger.addHandler(console)
+
+    server = hashserv.create_server(args.bind, args.database, upstream=args.upstream, read_only=args.read_only)
+    server.serve_forever()
+    return 0
+
+
+if __name__ == '__main__':
+    try:
+        ret = main()
+    except Exception:
+        ret = 1
+        import traceback
+        traceback.print_exc()
+    sys.exit(ret)

bitbake/bin/bitbake-layers

@@ -0,0 +1,102 @@
+#!/usr/bin/env python3
+
+# This script has subcommands which operate against your bitbake layers, either
+# displaying useful information, or acting against them.
+# See the help output for details on available commands.
+
+# Copyright (C) 2011 Mentor Graphics Corporation
+# Copyright (C) 2011-2015 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import logging
+import os
+import sys
+import argparse
+import warnings
+warnings.simplefilter("default")
+
+bindir = os.path.dirname(__file__)
+topdir = os.path.dirname(bindir)
+sys.path[0:0] = [os.path.join(topdir, 'lib')]
+
+import bb.tinfoil
+import bb.msg
+
+logger = bb.msg.logger_create('bitbake-layers', sys.stdout)
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="BitBake layers utility",
+        epilog="Use %(prog)s <subcommand> --help to get help on a specific command",
+        add_help=False)
+    parser.add_argument('-d', '--debug', help='Enable debug output', action='store_true')
+    parser.add_argument('-q', '--quiet', help='Print only errors', action='store_true')
+    parser.add_argument('-F', '--force', help='Force add without recipe parse verification', action='store_true')
+    parser.add_argument('--color', choices=['auto', 'always', 'never'], default='auto', help='Colorize output (where %(metavar)s is %(choices)s)', metavar='COLOR')
+
+    global_args, unparsed_args = parser.parse_known_args()
+
+    # Help is added here rather than via add_help=True, as we don't want it to
+    # be handled by parse_known_args()
+    parser.add_argument('-h', '--help', action='help', default=argparse.SUPPRESS,
+                        help='show this help message and exit')
+    subparsers = parser.add_subparsers(title='subcommands', metavar='<subcommand>')
+    subparsers.required = True
+
+    if global_args.debug:
+        logger.setLevel(logging.DEBUG)
+    elif global_args.quiet:
+        logger.setLevel(logging.ERROR)
+
+    # Need to re-run logger_create with color argument
+    # (will be the same logger since it has the same name)
+    bb.msg.logger_create('bitbake-layers', output=sys.stdout,
+                         color=global_args.color,
+                         level=logger.getEffectiveLevel())
+
+    plugins = []
+    tinfoil = bb.tinfoil.Tinfoil(tracking=True)
+    tinfoil.logger.setLevel(logger.getEffectiveLevel())
+    try:
+        tinfoil.prepare(True)
+        for path in ([topdir] +
+                    tinfoil.config_data.getVar('BBPATH').split(':')):
+            pluginpath = os.path.join(path, 'lib', 'bblayers')
+            bb.utils.load_plugins(logger, plugins, pluginpath)
+
+        registered = False
+        for plugin in plugins:
+            if hasattr(plugin, 'tinfoil_init'):
+                plugin.tinfoil_init(tinfoil)
+            if hasattr(plugin, 'register_commands'):
+                registered = True
+                plugin.register_commands(subparsers)
+
+        if not registered:
+            logger.error("No commands registered - missing plugins?")
+            sys.exit(1)
+
+        args = parser.parse_args(unparsed_args, namespace=global_args)
+
+        if getattr(args, 'parserecipes', False):
+            tinfoil.config_data.disableTracking()
+            tinfoil.parse_recipes()
+            tinfoil.config_data.enableTracking()
+
+        return args.func(args)
+    finally:
+        tinfoil.shutdown()
+
+
+if __name__ == "__main__":
+    try:
+        ret = main()
+    except bb.BBHandledException:
+        ret = 1
+    except Exception:
+        ret = 1
+        import traceback
+        traceback.print_exc()
+    sys.exit(ret)

bitbake/bin/bitbake-prserv

@@ -0,0 +1,65 @@
+#!/usr/bin/env python3
+#
+# Copyright BitBake Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import os
+import sys,logging
+import optparse
+import warnings
+warnings.simplefilter("default")
+
+sys.path.insert(0, os.path.join(os.path.dirname(os.path.dirname(__file__)),'lib'))
+
+import prserv
+import prserv.serv
+
+__version__="1.0.0"
+
+PRHOST_DEFAULT='0.0.0.0'
+PRPORT_DEFAULT=8585
+
+def main():
+    parser = optparse.OptionParser(
+        version="Bitbake PR Service Core version %s, %%prog version %s" % (prserv.__version__, __version__),
+        usage = "%prog < --start | --stop > [options]")
+
+    parser.add_option("-f", "--file", help="database filename(default: prserv.sqlite3)", action="store",
+                      dest="dbfile", type="string", default="prserv.sqlite3")
+    parser.add_option("-l", "--log", help="log filename(default: prserv.log)", action="store",
+                      dest="logfile", type="string", default="prserv.log")
+    parser.add_option("--loglevel", help="logging level, i.e. CRITICAL, ERROR, WARNING, INFO, DEBUG",
+                      action = "store", type="string", dest="loglevel", default = "INFO")
+    parser.add_option("--start", help="start daemon",
+                      action="store_true", dest="start")
+    parser.add_option("--stop", help="stop daemon",
+                      action="store_true", dest="stop")
+    parser.add_option("--host", help="ip address to bind", action="store",
+                      dest="host", type="string", default=PRHOST_DEFAULT)
+    parser.add_option("--port", help="port number(default: 8585)", action="store",
+                      dest="port", type="int", default=PRPORT_DEFAULT)
+    parser.add_option("-r", "--read-only", help="open database in read-only mode",
+                      action="store_true")
+
+    options, args = parser.parse_args(sys.argv)
+    prserv.init_logger(os.path.abspath(options.logfile),options.loglevel)
+
+    if options.start:
+        ret=prserv.serv.start_daemon(options.dbfile, options.host, options.port,os.path.abspath(options.logfile), options.read_only)
+    elif options.stop:
+        ret=prserv.serv.stop_daemon(options.host, options.port)
+    else:
+        ret=parser.print_help()
+    return ret
+
+if __name__ == "__main__":
+    try:
+        ret = main()
+    except Exception:
+        ret = 1
+        import traceback
+        traceback.print_exc()
+    sys.exit(ret)
+

bitbake/bin/bitbake-selftest

@@ -0,0 +1,77 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2012 Richard Purdie
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import os
+import sys, logging
+import warnings
+warnings.simplefilter("default")
+sys.path.insert(0, os.path.join(os.path.dirname(os.path.dirname(__file__)), 'lib'))
+
+import unittest
+try:
+    import bb
+    import hashserv
+    import layerindexlib
+except RuntimeError as exc:
+    sys.exit(str(exc))
+
+tests = ["bb.tests.codeparser",
+         "bb.tests.color",
+         "bb.tests.cooker",
+         "bb.tests.cow",
+         "bb.tests.data",
+         "bb.tests.event",
+         "bb.tests.fetch",
+         "bb.tests.parse",
+         "bb.tests.persist_data",
+         "bb.tests.runqueue",
+         "bb.tests.siggen",
+         "bb.tests.utils",
+         "bb.tests.compression",
+         "hashserv.tests",
+         "layerindexlib.tests.layerindexobj",
+         "layerindexlib.tests.restapi",
+         "layerindexlib.tests.cooker"]
+
+for t in tests:
+    t = '.'.join(t.split('.')[:3])
+    __import__(t)
+
+
+# Set-up logging
+class StdoutStreamHandler(logging.StreamHandler):
+    """Special handler so that unittest is able to capture stdout"""
+    def __init__(self):
+        # Override __init__() because we don't want to set self.stream here
+        logging.Handler.__init__(self)
+
+    @property
+    def stream(self):
+        # We want to dynamically write wherever sys.stdout is pointing to
+        return sys.stdout
+
+
+handler = StdoutStreamHandler()
+bb.logger.addHandler(handler)
+bb.logger.setLevel(logging.DEBUG)
+
+
+ENV_HELP = """\
+Environment variables:
+  BB_SKIP_NETTESTS      set to 'yes' in order to skip tests using network
+                        connection
+  BB_TMPDIR_NOCLEAN     set to 'yes' to preserve test tmp directories
+"""
+
+class main(unittest.main):
+    def _print_help(self, *args, **kwargs):
+        super(main, self)._print_help(*args, **kwargs)
+        print(ENV_HELP)
+
+
+if __name__ == '__main__':
+        main(defaultTest=tests, buffer=True)

bitbake/bin/bitbake-server

@@ -0,0 +1,55 @@
+#!/usr/bin/env python3
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Copyright (C) 2020        Richard Purdie
+#
+
+import os
+import sys
+import warnings
+warnings.simplefilter("default")
+import logging
+sys.path.insert(0, os.path.join(os.path.dirname(os.path.dirname(sys.argv[0])), 'lib'))
+
+import bb
+
+bb.utils.check_system_locale()
+
+# Users shouldn't be running this code directly
+if len(sys.argv) != 11 or not sys.argv[1].startswith("decafbad"):
+    print("bitbake-server is meant for internal execution by bitbake itself, please don't use it standalone.")
+    sys.exit(1)
+
+import bb.server.process
+
+lockfd = int(sys.argv[2])
+readypipeinfd = int(sys.argv[3])
+logfile = sys.argv[4]
+lockname = sys.argv[5]
+sockname = sys.argv[6]
+timeout = float(sys.argv[7])
+profile = bool(int(sys.argv[8]))
+xmlrpcinterface = (sys.argv[9], int(sys.argv[10]))
+if xmlrpcinterface[0] == "None":
+    xmlrpcinterface = (None, xmlrpcinterface[1])
+
+# Replace standard fds with our own
+with open('/dev/null', 'r') as si:
+    os.dup2(si.fileno(), sys.stdin.fileno())
+
+so = open(logfile, 'a+')
+os.dup2(so.fileno(), sys.stdout.fileno())
+os.dup2(so.fileno(), sys.stderr.fileno())
+
+# Have stdout and stderr be the same so log output matches chronologically
+# and there aren't two seperate buffers
+sys.stderr = sys.stdout
+
+logger = logging.getLogger("BitBake")
+# Ensure logging messages get sent to the UI as events
+handler = bb.event.LogHandler()
+logger.addHandler(handler)
+
+bb.server.process.execServer(lockfd, readypipeinfd, lockname, sockname, timeout, xmlrpcinterface, profile)
+

bitbake/bin/bitbake-worker

@@ -0,0 +1,563 @@
+#!/usr/bin/env python3
+#
+# Copyright BitBake Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import os
+import sys
+import warnings
+warnings.simplefilter("default")
+sys.path.insert(0, os.path.join(os.path.dirname(os.path.dirname(sys.argv[0])), 'lib'))
+from bb import fetch2
+import logging
+import bb
+import select
+import errno
+import signal
+import pickle
+import traceback
+import queue
+import shlex
+import subprocess
+from multiprocessing import Lock
+from threading import Thread
+
+bb.utils.check_system_locale()
+
+# Users shouldn't be running this code directly
+if len(sys.argv) != 2 or not sys.argv[1].startswith("decafbad"):
+    print("bitbake-worker is meant for internal execution by bitbake itself, please don't use it standalone.")
+    sys.exit(1)
+
+profiling = False
+if sys.argv[1].startswith("decafbadbad"):
+    profiling = True
+    try:
+        import cProfile as profile
+    except:
+        import profile
+
+# Unbuffer stdout to avoid log truncation in the event
+# of an unorderly exit as well as to provide timely
+# updates to log files for use with tail
+try:
+    if sys.stdout.name == '<stdout>':
+        import fcntl
+        fl = fcntl.fcntl(sys.stdout.fileno(), fcntl.F_GETFL)
+        fl |= os.O_SYNC 
+        fcntl.fcntl(sys.stdout.fileno(), fcntl.F_SETFL, fl)
+        #sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)
+except:
+    pass
+
+logger = logging.getLogger("BitBake")
+
+worker_pipe = sys.stdout.fileno()
+bb.utils.nonblockingfd(worker_pipe)
+# Need to guard against multiprocessing being used in child processes
+# and multiple processes trying to write to the parent at the same time
+worker_pipe_lock = None
+
+handler = bb.event.LogHandler()
+logger.addHandler(handler)
+
+if 0:
+    # Code to write out a log file of all events passing through the worker
+    logfilename = "/tmp/workerlogfile"
+    format_str = "%(levelname)s: %(message)s"
+    conlogformat = bb.msg.BBLogFormatter(format_str)
+    consolelog = logging.FileHandler(logfilename)
+    consolelog.setFormatter(conlogformat)
+    logger.addHandler(consolelog)
+
+worker_queue = queue.Queue()
+
+def worker_fire(event, d):
+    data = b"<event>" + pickle.dumps(event) + b"</event>"
+    worker_fire_prepickled(data)
+
+def worker_fire_prepickled(event):
+    global worker_queue
+
+    worker_queue.put(event)
+
+#
+# We can end up with write contention with the cooker, it can be trying to send commands
+# and we can be trying to send event data back. Therefore use a separate thread for writing 
+# back data to cooker.
+#
+worker_thread_exit = False
+
+def worker_flush(worker_queue):
+    worker_queue_int = b""
+    global worker_pipe, worker_thread_exit
+
+    while True:
+        try:
+            worker_queue_int = worker_queue_int + worker_queue.get(True, 1)
+        except queue.Empty:
+            pass
+        while (worker_queue_int or not worker_queue.empty()):
+            try:
+                (_, ready, _) = select.select([], [worker_pipe], [], 1)
+                if not worker_queue.empty():
+                    worker_queue_int = worker_queue_int + worker_queue.get()
+                written = os.write(worker_pipe, worker_queue_int)
+                worker_queue_int = worker_queue_int[written:]
+            except (IOError, OSError) as e:
+                if e.errno != errno.EAGAIN and e.errno != errno.EPIPE:
+                    raise
+        if worker_thread_exit and worker_queue.empty() and not worker_queue_int:
+            return
+
+worker_thread = Thread(target=worker_flush, args=(worker_queue,))
+worker_thread.start()
+
+def worker_child_fire(event, d):
+    global worker_pipe
+    global worker_pipe_lock
+
+    data = b"<event>" + pickle.dumps(event) + b"</event>"
+    try:
+        with bb.utils.lock_timeout(worker_pipe_lock):
+            while(len(data)):
+                written = worker_pipe.write(data)
+                data = data[written:]
+    except IOError:
+        sigterm_handler(None, None)
+        raise
+
+bb.event.worker_fire = worker_fire
+
+lf = None
+#lf = open("/tmp/workercommandlog", "w+")
+def workerlog_write(msg):
+    if lf:
+        lf.write(msg)
+        lf.flush()
+
+def sigterm_handler(signum, frame):
+    signal.signal(signal.SIGTERM, signal.SIG_DFL)
+    os.killpg(0, signal.SIGTERM)
+    sys.exit()
+
+def fork_off_task(cfg, data, databuilder, workerdata, extraconfigdata, runtask):
+
+    fn = runtask['fn']
+    task = runtask['task']
+    taskname = runtask['taskname']
+    taskhash = runtask['taskhash']
+    unihash = runtask['unihash']
+    appends = runtask['appends']
+    taskdepdata = runtask['taskdepdata']
+    quieterrors = runtask['quieterrors']
+    # We need to setup the environment BEFORE the fork, since
+    # a fork() or exec*() activates PSEUDO...
+
+    envbackup = {}
+    fakeroot = False
+    fakeenv = {}
+    umask = None
+
+    uid = os.getuid()
+    gid = os.getgid()
+
+    taskdep = runtask['taskdep']
+    if 'umask' in taskdep and taskname in taskdep['umask']:
+        umask = taskdep['umask'][taskname]
+    elif workerdata["umask"]:
+        umask = workerdata["umask"]
+    if umask:
+        # umask might come in as a number or text string..
+        try:
+             umask = int(umask, 8)
+        except TypeError:
+             pass
+
+    dry_run = cfg.dry_run or runtask['dry_run']
+
+    # We can't use the fakeroot environment in a dry run as it possibly hasn't been built
+    if 'fakeroot' in taskdep and taskname in taskdep['fakeroot'] and not dry_run:
+        fakeroot = True
+        envvars = (runtask['fakerootenv'] or "").split()
+        for key, value in (var.split('=') for var in envvars):
+            envbackup[key] = os.environ.get(key)
+            os.environ[key] = value
+            fakeenv[key] = value
+
+        fakedirs = (runtask['fakerootdirs'] or "").split()
+        for p in fakedirs:
+            bb.utils.mkdirhier(p)
+        logger.debug2('Running %s:%s under fakeroot, fakedirs: %s' %
+                        (fn, taskname, ', '.join(fakedirs)))
+    else:
+        envvars = (runtask['fakerootnoenv'] or "").split()
+        for key, value in (var.split('=') for var in envvars):
+            envbackup[key] = os.environ.get(key)
+            os.environ[key] = value
+            fakeenv[key] = value
+
+    sys.stdout.flush()
+    sys.stderr.flush()
+
+    try:
+        pipein, pipeout = os.pipe()
+        pipein = os.fdopen(pipein, 'rb', 4096)
+        pipeout = os.fdopen(pipeout, 'wb', 0)
+        pid = os.fork()
+    except OSError as e:
+        logger.critical("fork failed: %d (%s)" % (e.errno, e.strerror))
+        sys.exit(1)
+
+    if pid == 0:
+        def child():
+            global worker_pipe
+            global worker_pipe_lock
+            pipein.close()
+
+            bb.utils.signal_on_parent_exit("SIGTERM")
+
+            # Save out the PID so that the event can include it the
+            # events
+            bb.event.worker_pid = os.getpid()
+            bb.event.worker_fire = worker_child_fire
+            worker_pipe = pipeout
+            worker_pipe_lock = Lock()
+
+            # Make the child the process group leader and ensure no
+            # child process will be controlled by the current terminal
+            # This ensures signals sent to the controlling terminal like Ctrl+C
+            # don't stop the child processes.
+            os.setsid()
+
+            signal.signal(signal.SIGTERM, sigterm_handler)
+            # Let SIGHUP exit as SIGTERM
+            signal.signal(signal.SIGHUP, sigterm_handler)
+
+            # No stdin
+            newsi = os.open(os.devnull, os.O_RDWR)
+            os.dup2(newsi, sys.stdin.fileno())
+
+            if umask:
+                os.umask(umask)
+
+            try:
+                (realfn, virtual, mc) = bb.cache.virtualfn2realfn(fn)
+                the_data = databuilder.mcdata[mc]
+                the_data.setVar("BB_WORKERCONTEXT", "1")
+                the_data.setVar("BB_TASKDEPDATA", taskdepdata)
+                the_data.setVar('BB_CURRENTTASK', taskname.replace("do_", ""))
+                if cfg.limited_deps:
+                    the_data.setVar("BB_LIMITEDDEPS", "1")
+                the_data.setVar("BUILDNAME", workerdata["buildname"])
+                the_data.setVar("DATE", workerdata["date"])
+                the_data.setVar("TIME", workerdata["time"])
+                for varname, value in extraconfigdata.items():
+                    the_data.setVar(varname, value)
+
+                bb.parse.siggen.set_taskdata(workerdata["sigdata"])
+                if "newhashes" in workerdata:
+                    bb.parse.siggen.set_taskhashes(workerdata["newhashes"])
+                ret = 0
+
+                the_data = databuilder.parseRecipe(fn, appends)
+                the_data.setVar('BB_TASKHASH', taskhash)
+                the_data.setVar('BB_UNIHASH', unihash)
+                bb.parse.siggen.setup_datacache_from_datastore(fn, the_data)
+
+                bb.utils.set_process_name("%s:%s" % (the_data.getVar("PN"), taskname.replace("do_", "")))
+
+                if not bb.utils.to_boolean(the_data.getVarFlag(taskname, 'network')):
+                    if bb.utils.is_local_uid(uid):
+                        logger.debug("Attempting to disable network for %s" % taskname)
+                        bb.utils.disable_network(uid, gid)
+                    else:
+                        logger.debug("Skipping disable network for %s since %s is not a local uid." % (taskname, uid))
+
+                # exported_vars() returns a generator which *cannot* be passed to os.environ.update() 
+                # successfully. We also need to unset anything from the environment which shouldn't be there 
+                exports = bb.data.exported_vars(the_data)
+
+                bb.utils.empty_environment()
+                for e, v in exports:
+                    os.environ[e] = v
+
+                for e in fakeenv:
+                    os.environ[e] = fakeenv[e]
+                    the_data.setVar(e, fakeenv[e])
+                    the_data.setVarFlag(e, 'export', "1")
+
+                task_exports = the_data.getVarFlag(taskname, 'exports')
+                if task_exports:
+                    for e in task_exports.split():
+                        the_data.setVarFlag(e, 'export', '1')
+                        v = the_data.getVar(e)
+                        if v is not None:
+                            os.environ[e] = v
+
+                if quieterrors:
+                    the_data.setVarFlag(taskname, "quieterrors", "1")
+
+            except Exception:
+                if not quieterrors:
+                    logger.critical(traceback.format_exc())
+                os._exit(1)
+            try:
+                if dry_run:
+                    return 0
+                try:
+                    ret = bb.build.exec_task(fn, taskname, the_data, cfg.profile)
+                finally:
+                    if fakeroot:
+                        fakerootcmd = shlex.split(the_data.getVar("FAKEROOTCMD"))
+                        subprocess.run(fakerootcmd + ['-S'], check=True, stdout=subprocess.PIPE)
+                return ret
+            except:
+                os._exit(1)
+        if not profiling:
+            os._exit(child())
+        else:
+            profname = "profile-%s.log" % (fn.replace("/", "-") + "-" + taskname)
+            prof = profile.Profile()
+            try: 
+                ret = profile.Profile.runcall(prof, child)
+            finally:
+                prof.dump_stats(profname)
+                bb.utils.process_profilelog(profname)
+                os._exit(ret)
+    else:
+        for key, value in iter(envbackup.items()):
+            if value is None:
+                del os.environ[key]
+            else:
+                os.environ[key] = value
+
+    return pid, pipein, pipeout
+
+class runQueueWorkerPipe():
+    """
+    Abstraction for a pipe between a worker thread and the worker server
+    """
+    def __init__(self, pipein, pipeout):
+        self.input = pipein
+        if pipeout:
+            pipeout.close()
+        bb.utils.nonblockingfd(self.input)
+        self.queue = b""
+
+    def read(self):
+        start = len(self.queue)
+        try:
+            self.queue = self.queue + (self.input.read(102400) or b"")
+        except (OSError, IOError) as e:
+            if e.errno != errno.EAGAIN:
+                raise
+
+        end = len(self.queue)
+        index = self.queue.find(b"</event>")
+        while index != -1:
+            msg = self.queue[:index+8]
+            assert msg.startswith(b"<event>") and msg.count(b"<event>") == 1
+            worker_fire_prepickled(msg)
+            self.queue = self.queue[index+8:]
+            index = self.queue.find(b"</event>")
+        return (end > start)
+
+    def close(self):
+        while self.read():
+            continue
+        if len(self.queue) > 0:
+            print("Warning, worker child left partial message: %s" % self.queue)
+        self.input.close()
+
+normalexit = False
+
+class BitbakeWorker(object):
+    def __init__(self, din):
+        self.input = din
+        bb.utils.nonblockingfd(self.input)
+        self.queue = b""
+        self.cookercfg = None
+        self.databuilder = None
+        self.data = None
+        self.extraconfigdata = None
+        self.build_pids = {}
+        self.build_pipes = {}
+    
+        signal.signal(signal.SIGTERM, self.sigterm_exception)
+        # Let SIGHUP exit as SIGTERM
+        signal.signal(signal.SIGHUP, self.sigterm_exception)
+        if "beef" in sys.argv[1]:
+            bb.utils.set_process_name("Worker (Fakeroot)")
+        else:
+            bb.utils.set_process_name("Worker")
+
+    def sigterm_exception(self, signum, stackframe):
+        if signum == signal.SIGTERM:
+            bb.warn("Worker received SIGTERM, shutting down...")
+        elif signum == signal.SIGHUP:
+            bb.warn("Worker received SIGHUP, shutting down...")
+        self.handle_finishnow(None)
+        signal.signal(signal.SIGTERM, signal.SIG_DFL)
+        os.kill(os.getpid(), signal.SIGTERM)
+
+    def serve(self):        
+        while True:
+            (ready, _, _) = select.select([self.input] + [i.input for i in self.build_pipes.values()], [] , [], 1)
+            if self.input in ready:
+                try:
+                    r = self.input.read()
+                    if len(r) == 0:
+                        # EOF on pipe, server must have terminated
+                        self.sigterm_exception(signal.SIGTERM, None)
+                    self.queue = self.queue + r
+                except (OSError, IOError):
+                    pass
+            if len(self.queue):
+                self.handle_item(b"cookerconfig", self.handle_cookercfg)
+                self.handle_item(b"extraconfigdata", self.handle_extraconfigdata)
+                self.handle_item(b"workerdata", self.handle_workerdata)
+                self.handle_item(b"newtaskhashes", self.handle_newtaskhashes)
+                self.handle_item(b"runtask", self.handle_runtask)
+                self.handle_item(b"finishnow", self.handle_finishnow)
+                self.handle_item(b"ping", self.handle_ping)
+                self.handle_item(b"quit", self.handle_quit)
+
+            for pipe in self.build_pipes:
+                if self.build_pipes[pipe].input in ready:
+                    self.build_pipes[pipe].read()
+            if len(self.build_pids):
+                while self.process_waitpid():
+                    continue
+
+
+    def handle_item(self, item, func):
+        if self.queue.startswith(b"<" + item + b">"):
+            index = self.queue.find(b"</" + item + b">")
+            while index != -1:
+                try:
+                    func(self.queue[(len(item) + 2):index])
+                except pickle.UnpicklingError:
+                    workerlog_write("Unable to unpickle data: %s\n" % ":".join("{:02x}".format(c) for c in self.queue))
+                    raise
+                self.queue = self.queue[(index + len(item) + 3):]
+                index = self.queue.find(b"</" + item + b">")
+
+    def handle_cookercfg(self, data):
+        self.cookercfg = pickle.loads(data)
+        self.databuilder = bb.cookerdata.CookerDataBuilder(self.cookercfg, worker=True)
+        self.databuilder.parseBaseConfiguration(worker=True)
+        self.data = self.databuilder.data
+
+    def handle_extraconfigdata(self, data):
+        self.extraconfigdata = pickle.loads(data)
+
+    def handle_workerdata(self, data):
+        self.workerdata = pickle.loads(data)
+        bb.build.verboseShellLogging = self.workerdata["build_verbose_shell"]
+        bb.build.verboseStdoutLogging = self.workerdata["build_verbose_stdout"]
+        bb.msg.loggerDefaultLogLevel = self.workerdata["logdefaultlevel"]
+        bb.msg.loggerDefaultDomains = self.workerdata["logdefaultdomain"]
+        for mc in self.databuilder.mcdata:
+            self.databuilder.mcdata[mc].setVar("PRSERV_HOST", self.workerdata["prhost"])
+            self.databuilder.mcdata[mc].setVar("BB_HASHSERVE", self.workerdata["hashservaddr"])
+            self.databuilder.mcdata[mc].setVar("__bbclasstype", "recipe")
+
+    def handle_newtaskhashes(self, data):
+        self.workerdata["newhashes"] = pickle.loads(data)
+
+    def handle_ping(self, _):
+        workerlog_write("Handling ping\n")
+
+        logger.warning("Pong from bitbake-worker!")
+
+    def handle_quit(self, data):
+        workerlog_write("Handling quit\n")
+
+        global normalexit
+        normalexit = True
+        sys.exit(0)
+
+    def handle_runtask(self, data):
+        runtask = pickle.loads(data)
+
+        fn = runtask['fn']
+        task = runtask['task']
+        taskname = runtask['taskname']
+
+        workerlog_write("Handling runtask %s %s %s\n" % (task, fn, taskname))
+
+        pid, pipein, pipeout = fork_off_task(self.cookercfg, self.data, self.databuilder, self.workerdata, self.extraconfigdata, runtask)
+        self.build_pids[pid] = task
+        self.build_pipes[pid] = runQueueWorkerPipe(pipein, pipeout)
+
+    def process_waitpid(self):
+        """
+        Return none is there are no processes awaiting result collection, otherwise
+        collect the process exit codes and close the information pipe.
+        """
+        try:
+            pid, status = os.waitpid(-1, os.WNOHANG)
+            if pid == 0 or os.WIFSTOPPED(status):
+                return False
+        except OSError:
+            return False
+
+        workerlog_write("Exit code of %s for pid %s\n" % (status, pid))
+
+        if os.WIFEXITED(status):
+            status = os.WEXITSTATUS(status)
+        elif os.WIFSIGNALED(status):
+            # Per shell conventions for $?, when a process exits due to
+            # a signal, we return an exit code of 128 + SIGNUM
+            status = 128 + os.WTERMSIG(status)
+
+        task = self.build_pids[pid]
+        del self.build_pids[pid]
+
+        self.build_pipes[pid].close()
+        del self.build_pipes[pid]
+
+        worker_fire_prepickled(b"<exitcode>" + pickle.dumps((task, status)) + b"</exitcode>")
+
+        return True
+
+    def handle_finishnow(self, _):
+        if self.build_pids:
+            logger.info("Sending SIGTERM to remaining %s tasks", len(self.build_pids))
+            for k, v in iter(self.build_pids.items()):
+                try:
+                    os.kill(-k, signal.SIGTERM)
+                    os.waitpid(-1, 0)
+                except:
+                    pass
+        for pipe in self.build_pipes:
+            self.build_pipes[pipe].read()
+
+try:
+    worker = BitbakeWorker(os.fdopen(sys.stdin.fileno(), 'rb'))
+    if not profiling:
+        worker.serve()
+    else:
+        profname = "profile-worker.log"
+        prof = profile.Profile()
+        try:
+            profile.Profile.runcall(prof, worker.serve)
+        finally:
+            prof.dump_stats(profname)
+            bb.utils.process_profilelog(profname)
+except BaseException as e:
+    if not normalexit:
+        import traceback
+        sys.stderr.write(traceback.format_exc())
+        sys.stderr.write(str(e))
+finally:
+    worker_thread_exit = True
+    worker_thread.join()
+
+workerlog_write("exiting")
+if not normalexit:
+    sys.exit(1)
+sys.exit(0)

bitbake/bin/git-make-shallow

@@ -0,0 +1,173 @@
+#!/usr/bin/env python3
+#
+# Copyright BitBake Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+"""git-make-shallow: make the current git repository shallow
+
+Remove the history of the specified revisions, then optionally filter the
+available refs to those specified.
+"""
+
+import argparse
+import collections
+import errno
+import itertools
+import os
+import subprocess
+import sys
+import warnings
+warnings.simplefilter("default")
+
+version = 1.0
+
+
+def main():
+    if sys.version_info < (3, 4, 0):
+        sys.exit('Python 3.4 or greater is required')
+
+    git_dir = check_output(['git', 'rev-parse', '--git-dir']).rstrip()
+    shallow_file = os.path.join(git_dir, 'shallow')
+    if os.path.exists(shallow_file):
+        try:
+            check_output(['git', 'fetch', '--unshallow'])
+        except subprocess.CalledProcessError:
+            try:
+                os.unlink(shallow_file)
+            except OSError as exc:
+                if exc.errno != errno.ENOENT:
+                    raise
+
+    args = process_args()
+    revs = check_output(['git', 'rev-list'] + args.revisions).splitlines()
+
+    make_shallow(shallow_file, args.revisions, args.refs)
+
+    ref_revs = check_output(['git', 'rev-list'] + args.refs).splitlines()
+    remaining_history = set(revs) & set(ref_revs)
+    for rev in remaining_history:
+        if check_output(['git', 'rev-parse', '{}^@'.format(rev)]):
+            sys.exit('Error: %s was not made shallow' % rev)
+
+    filter_refs(args.refs)
+
+    if args.shrink:
+        shrink_repo(git_dir)
+        subprocess.check_call(['git', 'fsck', '--unreachable'])
+
+
+def process_args():
+    # TODO: add argument to automatically keep local-only refs, since they
+    # can't be easily restored with a git fetch.
+    parser = argparse.ArgumentParser(description='Remove the history of the specified revisions, then optionally filter the available refs to those specified.')
+    parser.add_argument('--ref', '-r', metavar='REF', action='append', dest='refs', help='remove all but the specified refs (cumulative)')
+    parser.add_argument('--shrink', '-s', action='store_true', help='shrink the git repository by repacking and pruning')
+    parser.add_argument('revisions', metavar='REVISION', nargs='+', help='a git revision/commit')
+    if len(sys.argv) < 2:
+        parser.print_help()
+        sys.exit(2)
+
+    args = parser.parse_args()
+
+    if args.refs:
+        args.refs = check_output(['git', 'rev-parse', '--symbolic-full-name'] + args.refs).splitlines()
+    else:
+        args.refs = get_all_refs(lambda r, t, tt: t == 'commit' or tt == 'commit')
+
+    args.refs = list(filter(lambda r: not r.endswith('/HEAD'), args.refs))
+    args.revisions = check_output(['git', 'rev-parse'] + ['%s^{}' % i for i in args.revisions]).splitlines()
+    return args
+
+
+def check_output(cmd, input=None):
+    return subprocess.check_output(cmd, universal_newlines=True, input=input)
+
+
+def make_shallow(shallow_file, revisions, refs):
+    """Remove the history of the specified revisions."""
+    for rev in follow_history_intersections(revisions, refs):
+        print("Processing %s" % rev)
+        with open(shallow_file, 'a') as f:
+            f.write(rev + '\n')
+
+
+def get_all_refs(ref_filter=None):
+    """Return all the existing refs in this repository, optionally filtering the refs."""
+    ref_output = check_output(['git', 'for-each-ref', '--format=%(refname)\t%(objecttype)\t%(*objecttype)'])
+    ref_split = [tuple(iter_extend(l.rsplit('\t'), 3)) for l in ref_output.splitlines()]
+    if ref_filter:
+        ref_split = (e for e in ref_split if ref_filter(*e))
+    refs = [r[0] for r in ref_split]
+    return refs
+
+
+def iter_extend(iterable, length, obj=None):
+    """Ensure that iterable is the specified length by extending with obj."""
+    return itertools.islice(itertools.chain(iterable, itertools.repeat(obj)), length)
+
+
+def filter_refs(refs):
+    """Remove all but the specified refs from the git repository."""
+    all_refs = get_all_refs()
+    to_remove = set(all_refs) - set(refs)
+    if to_remove:
+        check_output(['xargs', '-0', '-n', '1', 'git', 'update-ref', '-d', '--no-deref'],
+                     input=''.join(l + '\0' for l in to_remove))
+
+
+def follow_history_intersections(revisions, refs):
+    """Determine all the points where the history of the specified revisions intersects the specified refs."""
+    queue = collections.deque(revisions)
+    seen = set()
+
+    for rev in iter_except(queue.popleft, IndexError):
+        if rev in seen:
+            continue
+
+        parents = check_output(['git', 'rev-parse', '%s^@' % rev]).splitlines()
+
+        yield rev
+        seen.add(rev)
+
+        if not parents:
+            continue
+
+        check_refs = check_output(['git', 'merge-base', '--independent'] + sorted(refs)).splitlines()
+        for parent in parents:
+            for ref in check_refs:
+                print("Checking %s vs %s" % (parent, ref))
+                try:
+                    merge_base = check_output(['git', 'merge-base', parent, ref]).rstrip()
+                except subprocess.CalledProcessError:
+                    continue
+                else:
+                    queue.append(merge_base)
+
+
+def iter_except(func, exception, start=None):
+    """Yield a function repeatedly until it raises an exception."""
+    try:
+        if start is not None:
+            yield start()
+        while True:
+            yield func()
+    except exception:
+        pass
+
+
+def shrink_repo(git_dir):
+    """Shrink the newly shallow repository, removing the unreachable objects."""
+    subprocess.check_call(['git', 'reflog', 'expire', '--expire-unreachable=now', '--all'])
+    subprocess.check_call(['git', 'repack', '-ad'])
+    try:
+        os.unlink(os.path.join(git_dir, 'objects', 'info', 'alternates'))
+    except OSError as exc:
+        if exc.errno != errno.ENOENT:
+            raise
+    subprocess.check_call(['git', 'prune', '--expire', 'now'])
+
+
+if __name__ == '__main__':
+    main()

bitbake/bin/toaster

@@ -0,0 +1,324 @@
+#!/bin/echo ERROR: This script needs to be sourced. Please run as .
+
+# toaster - shell script to start Toaster
+
+# Copyright (C) 2013-2015 Intel Corp.
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+
+HELP="
+Usage 1: source toaster start|stop [webport=<address:port>] [noweb] [nobuild] [toasterdir]
+    Optional arguments:
+        [nobuild] Setup the environment for capturing builds with toaster but disable managed builds
+        [noweb] Setup the environment for capturing builds with toaster but don't start the web server
+        [webport] Set the development server (default: localhost:8000)
+        [toasterdir] Set absolute path to be used as TOASTER_DIR (default: BUILDDIR/../)
+Usage 2: source toaster manage [createsuperuser|lsupdates|migrate|makemigrations|checksettings|collectstatic|...]
+"
+
+custom_extention()
+{
+    custom_extension=$BBBASEDIR/lib/toaster/orm/fixtures/custom_toaster_append.sh
+    if [ -f $custom_extension ] ; then
+        $custom_extension $*
+    fi
+}
+
+databaseCheck()
+{
+    retval=0
+    # you can always add a superuser later via
+    # ../bitbake/lib/toaster/manage.py createsuperuser --username=<ME>
+    $MANAGE migrate --noinput || retval=1
+
+    if [ $retval -eq 1 ]; then
+        echo "Failed migrations, halting system start" 1>&2
+        return $retval
+    fi
+    # Make sure that checksettings can pick up any value for TEMPLATECONF
+    export TEMPLATECONF
+    $MANAGE checksettings --traceback || retval=1
+
+    if [ $retval -eq 1 ]; then
+        printf "\nError while checking settings; exiting\n"
+        return $retval
+    fi
+
+    return $retval
+}
+
+webserverKillAll()
+{
+    local pidfile
+    if [ -f ${BUILDDIR}/.toastermain.pid ] ; then
+        custom_extention web_stop_postpend
+    else
+        custom_extention noweb_stop_postpend
+    fi
+    for pidfile in ${BUILDDIR}/.toastermain.pid ${BUILDDIR}/.runbuilds.pid; do
+        if [ -f ${pidfile} ]; then
+            pid=`cat ${pidfile}`
+            while kill -0 $pid 2>/dev/null; do
+                kill -SIGTERM $pid 2>/dev/null
+                sleep 1
+            done
+            rm  ${pidfile}
+        fi
+    done
+}
+
+webserverStartAll()
+{
+    # do not start if toastermain points to a valid process
+    if ! cat "${BUILDDIR}/.toastermain.pid" 2>/dev/null | xargs -I{} kill -0 {} ; then
+        retval=1
+        rm "${BUILDDIR}/.toastermain.pid"
+    fi
+
+    retval=0
+
+    # check the database
+    databaseCheck || return 1
+
+    echo "Starting webserver..."
+
+    $MANAGE runserver --noreload "$ADDR_PORT" \
+           </dev/null >>${BUILDDIR}/toaster_web.log 2>&1 \
+           & echo $! >${BUILDDIR}/.toastermain.pid
+
+    sleep 1
+
+    if ! cat "${BUILDDIR}/.toastermain.pid" | xargs -I{} kill -0 {} ; then
+        retval=1
+        rm "${BUILDDIR}/.toastermain.pid"
+    else
+        echo "Toaster development webserver started at http://$ADDR_PORT"
+        echo -e "\nYou can now run 'bitbake <target>' on the command line and monitor your build in Toaster.\nYou can also use a Toaster project to configure and run a build.\n"
+        custom_extention web_start_postpend $ADDR_PORT
+    fi
+
+    return $retval
+}
+
+INSTOPSYSTEM=0
+
+# define the stop command
+stop_system()
+{
+    # prevent reentry
+    if [ $INSTOPSYSTEM -eq 1 ]; then return; fi
+    INSTOPSYSTEM=1
+    webserverKillAll
+    # unset exported variables
+    unset TOASTER_DIR
+    unset BITBAKE_UI
+    unset BBBASEDIR
+    trap - SIGHUP
+    #trap - SIGCHLD
+    INSTOPSYSTEM=0
+}
+
+verify_prereq() {
+    # Verify Django version
+    reqfile=$(python3 -c "import os; print(os.path.realpath('$BBBASEDIR/toaster-requirements.txt'))")
+    exp='s/Django\([><=]\+\)\([^,]\+\),\([><=]\+\)\(.\+\)/'
+    # expand version parts to 2 digits to support 1.10.x > 1.8
+    # (note:helper functions hard to insert in-line)
+    exp=$exp'import sys,django;'
+    exp=$exp'version=["%02d" % int(n) for n in django.get_version().split(".")];'
+    exp=$exp'vmin=["%02d" % int(n) for n in "\2".split(".")];'
+    exp=$exp'vmax=["%02d" % int(n) for n in "\4".split(".")];'
+    exp=$exp'sys.exit(not (version \1 vmin and version \3 vmax))'
+    exp=$exp'/p'
+    if ! sed -n "$exp" $reqfile | python3 - ; then
+        req=`grep ^Django $reqfile`
+        echo "This program needs $req"
+        echo "Please install with pip3 install -r $reqfile"
+        return 2
+    fi
+
+    return 0
+}
+
+# read command line parameters
+if [ -n "$BASH_SOURCE" ] ; then
+    TOASTER=${BASH_SOURCE}
+elif [ -n "$ZSH_NAME" ] ; then
+    TOASTER=${(%):-%x}
+else
+    TOASTER=$0
+fi
+
+export BBBASEDIR=`dirname $TOASTER`/..
+MANAGE="python3 $BBBASEDIR/lib/toaster/manage.py"
+if [ -z "$OE_ROOT" ]; then
+    OE_ROOT=`dirname $TOASTER`/../..
+fi
+
+# this is the configuraton file we are using for toaster
+# we are using the same logic that oe-setup-builddir uses
+# (based on TEMPLATECONF and .templateconf) to determine
+# which toasterconf.json to use.
+# note: There are a number of relative path assumptions
+# in the local layers that currently make using an arbitrary
+# toasterconf.json difficult.
+
+. $OE_ROOT/.templateconf
+if [ -n "$TEMPLATECONF" ]; then
+    if [ ! -d "$TEMPLATECONF" ]; then
+        # Allow TEMPLATECONF=meta-xyz/conf as a shortcut
+        if [ -d "$OE_ROOT/$TEMPLATECONF" ]; then
+            TEMPLATECONF="$OE_ROOT/$TEMPLATECONF"
+        fi
+    fi
+fi
+
+unset OE_ROOT
+
+
+WEBSERVER=1
+export TOASTER_BUILDSERVER=1
+ADDR_PORT="localhost:8000"
+TOASTERDIR=`dirname $BUILDDIR`
+unset CMD
+for param in $*; do
+    case $param in
+    noweb )
+            WEBSERVER=0
+    ;;
+    nobuild )
+            TOASTER_BUILDSERVER=0
+    ;;
+    start )
+            CMD=$param
+    ;;
+    stop )
+            CMD=$param
+    ;;
+    webport=*)
+            ADDR_PORT="${param#*=}"
+            # Split the addr:port string
+            ADDR=`echo $ADDR_PORT | cut -f 1 -d ':'`
+            PORT=`echo $ADDR_PORT | cut -f 2 -d ':'`
+            # If only a port has been speified then set address to localhost.
+            if [ $ADDR = $PORT ] ; then
+                ADDR_PORT="localhost:$PORT"
+            fi
+    ;;
+    toasterdir=*)
+            TOASTERDIR="${param#*=}"
+    ;;
+    manage )
+            CMD=$param
+            manage_cmd=""
+    ;;
+    --help)
+            echo "$HELP"
+            return 0
+    ;;
+    *)
+            if [ "manage" == "$CMD" ] ; then
+                manage_cmd="$manage_cmd $param"
+            else
+                echo "$HELP"
+                exit 1
+            fi
+    ;;
+
+    esac
+done
+
+if [ `basename \"$0\"` = `basename \"${TOASTER}\"` ]; then
+    echo "Error: This script needs to be sourced. Please run as . $TOASTER"
+    return 1
+fi
+
+verify_prereq || return 1
+
+# We make sure we're running in the current shell and in a good environment
+if [ -z "$BUILDDIR" ] ||  ! which bitbake >/dev/null 2>&1 ; then
+    echo "Error: Build environment is not setup or bitbake is not in path." 1>&2
+    return 2
+fi
+
+# this defines the dir toaster will use for
+# 1) clones of layers (in _toaster_clones )
+# 2) the build dir (in build)
+# 3) the sqlite db if that is being used.
+# 4) pid's we need to clean up on exit/shutdown
+export TOASTER_DIR=$TOASTERDIR
+export BB_ENV_PASSTHROUGH_ADDITIONS="$BB_ENV_PASSTHROUGH_ADDITIONS TOASTER_DIR"
+
+# Determine the action. If specified by arguments, fine, if not, toggle it
+if [ "$CMD" = "start" ] ; then
+    if [ -n "$BBSERVER" ]; then
+	echo " Toaster is already running. Exiting..."
+	return 1
+fi
+elif [ "$CMD" = "" ]; then
+    echo "No command specified"
+    echo "$HELP"
+    return 1
+fi
+
+echo "The system will $CMD."
+
+# Execute the commands
+custom_extention toaster_prepend $CMD $ADDR_PORT
+
+case $CMD in
+    start )
+        # check if addr:port is not in use
+        if [ "$CMD" == 'start' ]; then
+            if [ $WEBSERVER -gt 0 ]; then
+                $MANAGE checksocket "$ADDR_PORT" || return 1
+            fi
+        fi
+
+        # Create configuration file
+        conf=${BUILDDIR}/conf/local.conf
+        line='INHERIT+="toaster buildhistory"'
+        grep -q "$line" $conf || echo $line >> $conf
+
+        if [ $WEBSERVER -eq 0 ] ; then
+            # Do not update the database for "noweb" unless
+            # it does not yet exist
+            if [ ! -f "$TOASTER_DIR/toaster.sqlite" ] ; then
+                if ! databaseCheck; then
+                    echo "Failed ${CMD}."
+                    return 4
+                fi
+            fi
+            custom_extention noweb_start_postpend $ADDR_PORT
+        fi
+        if [ $WEBSERVER -gt 0 ] && ! webserverStartAll; then
+            echo "Failed ${CMD}."
+            return 4
+        fi
+        export BITBAKE_UI='toasterui'
+        if [ $TOASTER_BUILDSERVER -eq 1 ] ; then
+            $MANAGE runbuilds \
+               </dev/null >>${BUILDDIR}/toaster_runbuilds.log 2>&1 \
+               & echo $! >${BUILDDIR}/.runbuilds.pid
+        else
+            echo "Toaster build server not started."
+        fi
+
+        # set fail safe stop system on terminal exit
+        trap stop_system SIGHUP
+        echo "Successful ${CMD}."
+        custom_extention toaster_postpend $CMD $ADDR_PORT
+        return 0
+    ;;
+    stop )
+        stop_system
+        echo "Successful ${CMD}."
+    ;;
+    manage )
+        cd $BBBASEDIR/lib/toaster
+        $MANAGE $manage_cmd
+    ;;
+esac
+custom_extention toaster_postpend $CMD $ADDR_PORT
+

bitbake/bin/toaster-eventreplay

@@ -0,0 +1,115 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2014        Alex Damian
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# This file re-uses code spread throughout other Bitbake source files.
+# As such, all other copyrights belong to their own right holders.
+#
+
+"""
+This command takes a filename as a single parameter. The filename is read
+as a build eventlog, and the ToasterUI is used to process events in the file
+and log data in the database
+"""
+
+import os
+import sys
+import json
+import pickle
+import codecs
+import warnings
+warnings.simplefilter("default")
+
+from collections import namedtuple
+
+# mangle syspath to allow easy import of modules
+from os.path import join, dirname, abspath
+sys.path.insert(0, join(dirname(dirname(abspath(__file__))), 'lib'))
+
+import bb.cooker
+from bb.ui import toasterui
+
+class EventPlayer:
+    """Emulate a connection to a bitbake server."""
+
+    def __init__(self, eventfile, variables):
+        self.eventfile = eventfile
+        self.variables = variables
+        self.eventmask = []
+
+    def waitEvent(self, _timeout):
+        """Read event from the file."""
+        line = self.eventfile.readline().strip()
+        if not line:
+            return
+        try:
+            event_str = json.loads(line)['vars'].encode('utf-8')
+            event = pickle.loads(codecs.decode(event_str, 'base64'))
+            event_name = "%s.%s" % (event.__module__, event.__class__.__name__)
+            if event_name not in self.eventmask:
+                return
+            return event
+        except ValueError as err:
+            print("Failed loading ", line)
+            raise err
+
+    def runCommand(self, command_line):
+        """Emulate running a command on the server."""
+        name = command_line[0]
+
+        if name == "getVariable":
+            var_name = command_line[1]
+            variable = self.variables.get(var_name)
+            if variable:
+                return variable['v'], None
+            return None, "Missing variable %s" % var_name
+
+        elif name == "getAllKeysWithFlags":
+            dump = {}
+            flaglist = command_line[1]
+            for key, val in self.variables.items():
+                try:
+                    if not key.startswith("__"):
+                        dump[key] = {
+                            'v': val['v'],
+                            'history' : val['history'],
+                        }
+                        for flag in flaglist:
+                            dump[key][flag] = val[flag]
+                except Exception as err:
+                    print(err)
+            return (dump, None)
+
+        elif name == 'setEventMask':
+            self.eventmask = command_line[-1]
+            return True, None
+
+        else:
+            raise Exception("Command %s not implemented" % command_line[0])
+
+    def getEventHandle(self):
+        """
+        This method is called by toasterui.
+        The return value is passed to self.runCommand but not used there.
+        """
+        pass
+
+def main(argv):
+    with open(argv[-1]) as eventfile:
+        # load variables from the first line
+        variables = json.loads(eventfile.readline().strip())['allvariables']
+
+        params = namedtuple('ConfigParams', ['observe_only'])(True)
+        player = EventPlayer(eventfile, variables)
+
+        return toasterui.main(player, player, params)
+
+# run toaster ui on our mock bitbake class
+if __name__ == "__main__":
+    if len(sys.argv) != 2:
+        print("Usage: %s <event file>" % os.path.basename(sys.argv[0]))
+        sys.exit(1)
+
+    sys.exit(main(sys.argv))

bitbake/contrib/README

@@ -0,0 +1 @@
+This directory is for additional contributed files which may be useful.

bitbake/contrib/autobuilderlog.json

@@ -0,0 +1,13 @@
+{
+    "version": 1,
+    "loggers": {
+        "BitBake.SigGen.HashEquiv": {
+            "level": "VERBOSE",
+            "handlers": ["BitBake.verbconsole"]
+        },
+        "BitBake.RunQueue.HashEquiv": {
+            "level": "VERBOSE",
+            "handlers": ["BitBake.verbconsole"]
+        }
+    }
+}

bitbake/contrib/bbdev.sh

@@ -0,0 +1,31 @@
+# This is a shell function to be sourced into your shell or placed in your .profile,
+# which makes setting things up for BitBake a bit easier.
+#
+# The author disclaims copyright to the contents of this file and places it in the
+# public domain.
+
+bbdev () {
+	local BBDIR PKGDIR BUILDDIR
+	if test x"$1" = "x--help"; then echo >&2 "syntax: bbdev [bbdir [pkgdir [builddir]]]"; return 1; fi
+	if test x"$1" = x; then BBDIR=`pwd`; else BBDIR=$1; fi
+	if test x"$2" = x; then PKGDIR=`pwd`; else PKGDIR=$2; fi
+	if test x"$3" = x; then BUILDDIR=`pwd`; else BUILDDIR=$3; fi
+
+	BBDIR=`readlink -f $BBDIR`
+	PKGDIR=`readlink -f $PKGDIR`
+	BUILDDIR=`readlink -f $BUILDDIR`
+	if ! (test -d $BBDIR && test -d $PKGDIR && test -d $BUILDDIR); then
+		echo >&2 "syntax: bbdev [bbdir [pkgdir [builddir]]]"
+		return 1
+	fi
+	
+	PATH=$BBDIR/bin:$PATH
+	BBPATH=$BBDIR
+	if test x"$BBDIR" != x"$PKGDIR"; then
+		BBPATH=$PKGDIR:$BBPATH
+	fi
+	if test x"$PKGDIR" != x"$BUILDDIR"; then
+		BBPATH=$BUILDDIR:$BBPATH
+	fi
+	export BBPATH
+}

bitbake/contrib/bbparse-torture.py

@@ -0,0 +1,89 @@
+#! /usr/bin/env python3
+#
+# Copyright (C) 2020 Joshua Watt <JPEWhacker@gmail.com>
+#
+# SPDX-License-Identifier: MIT
+
+import argparse
+import os
+import random
+import shutil
+import signal
+import subprocess
+import sys
+import time
+
+
+def try_unlink(path):
+    try:
+        os.unlink(path)
+    except:
+        pass
+
+
+def main():
+    def cleanup():
+        shutil.rmtree("tmp/cache", ignore_errors=True)
+        try_unlink("bitbake-cookerdaemon.log")
+        try_unlink("bitbake.sock")
+        try_unlink("bitbake.lock")
+
+    parser = argparse.ArgumentParser(
+        description="Bitbake parser torture test",
+        epilog="""
+        A torture test for bitbake's parser. Repeatedly interrupts parsing until
+        bitbake decides to deadlock.
+        """,
+    )
+
+    args = parser.parse_args()
+
+    if not "BUILDDIR" in os.environ:
+        print(
+            "'BUILDDIR' not found in the environment. Did you initialize the build environment?"
+        )
+        return 1
+
+    os.chdir(os.environ["BUILDDIR"])
+
+    run_num = 0
+    while True:
+        if run_num % 100 == 0:
+            print("Calibrating wait time...")
+            cleanup()
+
+            start_time = time.monotonic()
+            r = subprocess.run(["bitbake", "-p"])
+            max_wait_time = time.monotonic() - start_time
+
+            if r.returncode != 0:
+                print("Calibration run exited with %d" % r.returncode)
+                return 1
+
+            print("Maximum wait time is %f seconds" % max_wait_time)
+
+        run_num += 1
+        wait_time = random.random() * max_wait_time
+
+        print("Run #%d" % run_num)
+        print("Will sleep for %f seconds" % wait_time)
+
+        cleanup()
+        with subprocess.Popen(["bitbake", "-p"]) as proc:
+            time.sleep(wait_time)
+            proc.send_signal(signal.SIGINT)
+            try:
+                proc.wait(45)
+            except subprocess.TimeoutExpired:
+                print("Run #%d: Waited too long. Possible deadlock!" % run_num)
+                proc.wait()
+                return 1
+
+            if proc.returncode == 0:
+                print("Exited successfully. Timeout too long?")
+            else:
+                print("Exited with %d" % proc.returncode)
+
+
+if __name__ == "__main__":
+    sys.exit(main())

bitbake/contrib/dump_cache.py

@@ -0,0 +1,83 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2012, 2018 Wind River Systems, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+#
+# Used for dumping the bb_cache.dat
+#
+import os
+import sys
+import argparse
+
+# For importing bb.cache
+sys.path.insert(0, os.path.join(os.path.abspath(os.path.dirname(sys.argv[0])), '../lib'))
+from bb.cache import CoreRecipeInfo
+
+import pickle
+
+class DumpCache(object):
+    def __init__(self):
+        parser = argparse.ArgumentParser(
+            description="bb_cache.dat's dumper",
+            epilog="Use %(prog)s --help to get help")
+        parser.add_argument("-r", "--recipe",
+            help="specify the recipe, default: all recipes", action="store")
+        parser.add_argument("-m", "--members",
+            help = "specify the member, use comma as separator for multiple ones, default: all members", action="store", default="")
+        parser.add_argument("-s", "--skip",
+            help = "skip skipped recipes", action="store_true")
+        parser.add_argument("cachefile",
+            help = "specify bb_cache.dat", nargs = 1, action="store", default="")
+
+        self.args = parser.parse_args()
+
+    def main(self):
+        with open(self.args.cachefile[0], "rb") as cachefile:
+            pickled = pickle.Unpickler(cachefile)
+            while True:
+                try:
+                    key = pickled.load()
+                    val = pickled.load()
+                except Exception:
+                    break
+                if isinstance(val, CoreRecipeInfo):
+                    pn = val.pn
+
+                    if self.args.recipe and self.args.recipe != pn:
+                        continue
+
+                    if self.args.skip and val.skipped:
+                        continue
+
+                    if self.args.members:
+                        out = key
+                        for member in self.args.members.split(','):
+                            out += ": %s" % val.__dict__.get(member)
+                        print("%s" % out)
+                    else:
+                        print("%s: %s" % (key, val.__dict__))
+                elif not self.args.recipe:
+                    print("%s %s" % (key, val))
+
+if __name__ == "__main__":
+    try:
+        dump = DumpCache()
+        ret = dump.main()
+    except Exception as esc:
+        ret = 1
+        import traceback
+        traceback.print_exc()
+    sys.exit(ret)

bitbake/contrib/hashserv/Dockerfile

@@ -0,0 +1,23 @@
+# SPDX-License-Identifier: MIT
+#
+# Copyright (c) 2021 Joshua Watt <JPEWhacker@gmail.com>
+#
+# Dockerfile to build a bitbake hash equivalence server container
+#
+# From the root of the bitbake repository, run:
+#
+#   docker build -f contrib/hashserv/Dockerfile .
+#
+
+FROM alpine:3.13.1
+
+RUN apk add --no-cache python3
+
+COPY bin/bitbake-hashserv /opt/bbhashserv/bin/
+COPY lib/hashserv /opt/bbhashserv/lib/hashserv/
+COPY lib/bb /opt/bbhashserv/lib/bb/
+COPY lib/codegen.py /opt/bbhashserv/lib/codegen.py
+COPY lib/ply /opt/bbhashserv/lib/ply/
+COPY lib/bs4 /opt/bbhashserv/lib/bs4/
+
+ENTRYPOINT ["/opt/bbhashserv/bin/bitbake-hashserv"]

bitbake/contrib/prserv/Dockerfile

@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: MIT
+#
+# Copyright (c) 2022 Daniel Gomez <daniel@qtec.com>
+#
+# Dockerfile to build a bitbake PR service container
+#
+# From the root of the bitbake repository, run:
+#
+#   docker build -f contrib/prserv/Dockerfile . -t prserv
+#
+# Running examples:
+#
+# 1. PR Service in RW mode, port 18585:
+#
+# docker run --detach --tty \
+# --env PORT=18585 \
+# --publish 18585:18585 \
+# --volume $PWD:/var/lib/bbprserv \
+# prserv
+#
+# 2. PR Service in RO mode, default port (8585) and custom LOGFILE:
+#
+# docker run --detach --tty \
+# --env DBMODE="--read-only" \
+# --env LOGFILE=/var/lib/bbprserv/prservro.log \
+# --publish 8585:8585 \
+# --volume $PWD:/var/lib/bbprserv \
+# prserv
+#
+
+FROM alpine:3.14.4
+
+RUN apk add --no-cache python3
+
+COPY bin/bitbake-prserv /opt/bbprserv/bin/
+COPY lib/prserv /opt/bbprserv/lib/prserv/
+COPY lib/bb /opt/bbprserv/lib/bb/
+COPY lib/codegen.py /opt/bbprserv/lib/codegen.py
+COPY lib/ply /opt/bbprserv/lib/ply/
+COPY lib/bs4 /opt/bbprserv/lib/bs4/
+
+ENV PATH=$PATH:/opt/bbprserv/bin
+
+RUN mkdir -p /var/lib/bbprserv
+
+ENV DBFILE=/var/lib/bbprserv/prserv.sqlite3 \
+    LOGFILE=/var/lib/bbprserv/prserv.log \
+    LOGLEVEL=debug \
+    HOST=0.0.0.0 \
+    PORT=8585 \
+    DBMODE=""
+
+ENTRYPOINT [ "/bin/sh", "-c", \
+"bitbake-prserv \
+--file=$DBFILE \
+--log=$LOGFILE \
+--loglevel=$LOGLEVEL \
+--start \
+--host=$HOST \
+--port=$PORT \
+$DBMODE \
+&& tail -f $LOGFILE"]

bitbake/contrib/vim/LICENSE.txt

@@ -0,0 +1,18 @@
+The MIT License (MIT)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

bitbake/contrib/vim/ftdetect/bitbake.vim

@@ -0,0 +1,24 @@
+" Vim filetype detection file
+" Language:     BitBake
+" Author:       Ricardo Salveti <rsalveti@rsalveti.net>
+" Copyright:    Copyright (C) 2008  Ricardo Salveti <rsalveti@rsalveti.net>
+" Licence:      You may redistribute this under the same terms as Vim itself
+"
+" This sets up the syntax highlighting for BitBake files, like .bb, .bbclass and .inc
+
+if &compatible || version < 600 || exists("b:loaded_bitbake_plugin")
+    finish
+endif
+
+" .bb, .bbappend and .bbclass
+au BufNewFile,BufRead *.{bb,bbappend,bbclass}  set filetype=bitbake
+
+" .inc
+au BufNewFile,BufRead *.inc		set filetype=bitbake
+
+" .conf
+au BufNewFile,BufRead *.conf
+    \ if (match(expand("%:p:h"), "conf") > 0) |
+    \     set filetype=bitbake |
+    \ endif
+

bitbake/contrib/vim/ftplugin/bitbake.vim

@@ -0,0 +1,13 @@
+" Only do this when not done yet for this buffer
+if exists("b:did_ftplugin")
+  finish
+endif
+
+" Don't load another plugin for this buffer
+let b:did_ftplugin = 1
+
+let b:undo_ftplugin = "setl cms< sts< sw< et< sua<"
+
+setlocal commentstring=#\ %s
+setlocal softtabstop=4 shiftwidth=4 expandtab
+setlocal suffixesadd+=.bb,.bbclass

bitbake/contrib/vim/indent/bitbake.vim

@@ -0,0 +1,343 @@
+" Vim indent file
+" Language:             BitBake
+" Copyright:            Copyright (C) 2019 Agilent Technologies, Inc.
+" Maintainer:           Chris Laplante <chris.laplante@agilent.com>
+" License:              You may redistribute this under the same terms as Vim itself
+
+
+if exists("b:did_indent")
+    finish
+endif
+
+if exists("*BitbakeIndent")
+    finish
+endif
+
+runtime! indent/sh.vim
+unlet b:did_indent
+
+setlocal indentexpr=BitbakeIndent(v:lnum)
+setlocal autoindent nolisp
+
+function s:is_bb_python_func_def(lnum)
+    let stack = synstack(a:lnum, 1)
+    if len(stack) == 0
+        return 0
+    endif
+
+    let top = synIDattr(stack[0], "name")
+    echo top
+
+    return synIDattr(stack[0], "name") == "bbPyFuncDef"
+endfunction
+
+"""" begin modified from indent/python.vim, upstream commit 7a9bd7c1e0ce1baf5a02daf36eeae3638aa315c7
+"""" This copied code is licensed the same as Vim itself.
+setlocal indentkeys+=<:>,=elif,=except
+
+let s:keepcpo= &cpo
+set cpo&vim
+
+let s:maxoff = 50	" maximum number of lines to look backwards for ()
+
+function GetPythonIndent(lnum)
+
+  " If this line is explicitly joined: If the previous line was also joined,
+  " line it up with that one, otherwise add two 'shiftwidth'
+  if getline(a:lnum - 1) =~ '\\$'
+    if a:lnum > 1 && getline(a:lnum - 2) =~ '\\$'
+      return indent(a:lnum - 1)
+    endif
+    return indent(a:lnum - 1) + (exists("g:pyindent_continue") ? eval(g:pyindent_continue) : (shiftwidth() * 2))
+  endif
+
+  " If the start of the line is in a string don't change the indent.
+  if has('syntax_items')
+	\ && synIDattr(synID(a:lnum, 1, 1), "name") =~ "String$"
+    return -1
+  endif
+
+  " Search backwards for the previous non-empty line.
+  let plnum = prevnonblank(v:lnum - 1)
+
+  if plnum == 0
+    " This is the first non-empty line, use zero indent.
+    return 0
+  endif
+
+  call cursor(plnum, 1)
+
+  " Identing inside parentheses can be very slow, regardless of the searchpair()
+  " timeout, so let the user disable this feature if he doesn't need it
+  let disable_parentheses_indenting = get(g:, "pyindent_disable_parentheses_indenting", 0)
+
+  if disable_parentheses_indenting == 1
+    let plindent = indent(plnum)
+    let plnumstart = plnum
+  else
+    " searchpair() can be slow sometimes, limit the time to 150 msec or what is
+    " put in g:pyindent_searchpair_timeout
+    let searchpair_stopline = 0
+    let searchpair_timeout = get(g:, 'pyindent_searchpair_timeout', 150)
+
+    " If the previous line is inside parenthesis, use the indent of the starting
+    " line.
+    " Trick: use the non-existing "dummy" variable to break out of the loop when
+    " going too far back.
+    let parlnum = searchpair('(\|{\|\[', '', ')\|}\|\]', 'nbW',
+            \ "line('.') < " . (plnum - s:maxoff) . " ? dummy :"
+            \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')"
+            \ . " =~ '\\(Comment\\|Todo\\|String\\)$'",
+            \ searchpair_stopline, searchpair_timeout)
+    if parlnum > 0
+      " We may have found the opening brace of a BitBake Python task, e.g. 'python do_task {'
+      " If so, ignore it here - it will be handled later.
+      if s:is_bb_python_func_def(parlnum)
+        let parlnum = 0
+        let plindent = indent(plnum)
+        let plnumstart = plnum
+      else
+        let plindent = indent(parlnum)
+        let plnumstart = parlnum
+      endif
+    else
+      let plindent = indent(plnum)
+      let plnumstart = plnum
+    endif
+
+    " When inside parenthesis: If at the first line below the parenthesis add
+    " two 'shiftwidth', otherwise same as previous line.
+    " i = (a
+    "       + b
+    "       + c)
+    call cursor(a:lnum, 1)
+    let p = searchpair('(\|{\|\[', '', ')\|}\|\]', 'bW',
+            \ "line('.') < " . (a:lnum - s:maxoff) . " ? dummy :"
+            \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')"
+            \ . " =~ '\\(Comment\\|Todo\\|String\\)$'",
+            \ searchpair_stopline, searchpair_timeout)
+    if p > 0
+        if s:is_bb_python_func_def(p)
+          " Handle first non-empty line inside a BB Python task
+          if p == plnum
+              return shiftwidth()
+          endif
+
+          " Handle the user actually trying to close a BitBake Python task
+          let line = getline(a:lnum)
+          if line =~ '^\s*}'
+              return -2
+          endif
+
+          " Otherwise ignore the brace
+          let p = 0
+        else
+          if p == plnum
+            " When the start is inside parenthesis, only indent one 'shiftwidth'.
+            let pp = searchpair('(\|{\|\[', '', ')\|}\|\]', 'bW',
+                \ "line('.') < " . (a:lnum - s:maxoff) . " ? dummy :"
+                \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')"
+                \ . " =~ '\\(Comment\\|Todo\\|String\\)$'",
+                \ searchpair_stopline, searchpair_timeout)
+            if pp > 0
+              return indent(plnum) + (exists("g:pyindent_nested_paren") ? eval(g:pyindent_nested_paren) : shiftwidth())
+            endif
+            return indent(plnum) + (exists("g:pyindent_open_paren") ? eval(g:pyindent_open_paren) : (shiftwidth() * 2))
+          endif
+          if plnumstart == p
+            return indent(plnum)
+          endif
+          return plindent
+        endif
+    endif
+
+  endif
+
+
+  " Get the line and remove a trailing comment.
+  " Use syntax highlighting attributes when possible.
+  let pline = getline(plnum)
+  let pline_len = strlen(pline)
+  if has('syntax_items')
+    " If the last character in the line is a comment, do a binary search for
+    " the start of the comment.  synID() is slow, a linear search would take
+    " too long on a long line.
+    if synIDattr(synID(plnum, pline_len, 1), "name") =~ "\\(Comment\\|Todo\\)$"
+      let min = 1
+      let max = pline_len
+      while min < max
+	let col = (min + max) / 2
+	if synIDattr(synID(plnum, col, 1), "name") =~ "\\(Comment\\|Todo\\)$"
+	  let max = col
+	else
+	  let min = col + 1
+	endif
+      endwhile
+      let pline = strpart(pline, 0, min - 1)
+    endif
+  else
+    let col = 0
+    while col < pline_len
+      if pline[col] == '#'
+	let pline = strpart(pline, 0, col)
+	break
+      endif
+      let col = col + 1
+    endwhile
+  endif
+
+  " If the previous line ended with a colon, indent this line
+  if pline =~ ':\s*$'
+    return plindent + shiftwidth()
+  endif
+
+  " If the previous line was a stop-execution statement...
+  " TODO: utilize this logic to deindent when ending a bbPyDefRegion
+  if getline(plnum) =~ '^\s*\(break\|continue\|raise\|return\|pass\|bb\.fatal\)\>'
+    " See if the user has already dedented
+    if indent(a:lnum) > indent(plnum) - shiftwidth()
+      " If not, recommend one dedent
+      return indent(plnum) - shiftwidth()
+    endif
+    " Otherwise, trust the user
+    return -1
+  endif
+
+  " If the current line begins with a keyword that lines up with "try"
+  if getline(a:lnum) =~ '^\s*\(except\|finally\)\>'
+    let lnum = a:lnum - 1
+    while lnum >= 1
+      if getline(lnum) =~ '^\s*\(try\|except\)\>'
+	let ind = indent(lnum)
+	if ind >= indent(a:lnum)
+	  return -1	" indent is already less than this
+	endif
+	return ind	" line up with previous try or except
+      endif
+      let lnum = lnum - 1
+    endwhile
+    return -1		" no matching "try"!
+  endif
+
+  " If the current line begins with a header keyword, dedent
+  if getline(a:lnum) =~ '^\s*\(elif\|else\)\>'
+
+    " Unless the previous line was a one-liner
+    if getline(plnumstart) =~ '^\s*\(for\|if\|try\)\>'
+      return plindent
+    endif
+
+    " Or the user has already dedented
+    if indent(a:lnum) <= plindent - shiftwidth()
+      return -1
+    endif
+
+    return plindent - shiftwidth()
+  endif
+
+  " When after a () construct we probably want to go back to the start line.
+  " a = (b
+  "       + c)
+  " here
+  if parlnum > 0
+    return plindent
+  endif
+
+  return -1
+
+endfunction
+
+let &cpo = s:keepcpo
+unlet s:keepcpo
+
+""" end of stuff from indent/python.vim
+
+
+let b:did_indent = 1
+setlocal indentkeys+=0\"
+
+
+function BitbakeIndent(lnum)
+    if !has('syntax_items')
+        return -1
+    endif
+
+    let stack = synstack(a:lnum, 1)
+    if len(stack) == 0
+        return -1
+    endif
+
+    let name = synIDattr(stack[0], "name")
+
+    " TODO: support different styles of indentation for assignments. For now,
+    " we only support like this:
+    " VAR = " \
+    "     value1 \
+    "     value2 \
+    " "
+    "
+    " i.e. each value indented by shiftwidth(), with the final quote " completely unindented.
+    if name == "bbVarValue"
+        " Quote handling is tricky. kernel.bbclass has this line for instance:
+        "     EXTRA_OEMAKE = " HOSTCC="${BUILD_CC} ${BUILD_CFLAGS} ${BUILD_LDFLAGS}" " HOSTCPP="${BUILD_CPP}""
+        " Instead of trying to handle crazy cases like that, just assume that a
+        " double-quote on a line by itself (following an assignment) means the
+        " user is closing the assignment, and de-dent.
+        if getline(a:lnum) =~ '^\s*"$'
+            return 0
+        endif
+
+        let prevstack = synstack(a:lnum - 1, 1)
+        if len(prevstack) == 0
+            return -1
+        endif
+
+        let prevname = synIDattr(prevstack[0], "name")
+
+        " Only indent if there was actually a continuation character on
+        " the previous line, to avoid misleading indentation.
+        let prevlinelastchar = synIDattr(synID(a:lnum - 1, col([a:lnum - 1, "$"]) - 1, 1), "name")
+        let prev_continued = prevlinelastchar == "bbContinue"
+
+        " Did the previous line introduce an assignment?
+        if index(["bbVarDef", "bbVarFlagDef"], prevname) != -1
+            if prev_continued
+                return shiftwidth()
+            endif
+        endif
+
+        if !prev_continued
+            return 0
+        endif
+
+        " Autoindent can take it from here
+        return -1
+    endif
+
+    if index(["bbPyDefRegion", "bbPyFuncRegion"], name) != -1
+        let ret = GetPythonIndent(a:lnum)
+        " Should normally always be indented by at least one shiftwidth; but allow
+        " return of -1 (defer to autoindent) or -2 (force indent to 0)
+        if ret == 0
+            return shiftwidth()
+        elseif ret == -2
+            return 0
+        endif
+        return ret
+    endif
+
+    " TODO: GetShIndent doesn't detect tasks prepended with 'fakeroot'
+    " Need to submit a patch upstream to Vim to provide an extension point.
+    " Unlike the Python indenter, the Sh indenter is way too large to copy and
+    " modify here.
+    if name == "bbShFuncRegion"
+        return GetShIndent()
+    endif
+
+    " TODO:
+    "   + heuristics for de-denting out of a bbPyDefRegion? e.g. when the user
+    "       types an obvious BB keyword like addhandler or addtask, or starts
+    "       writing a shell task. Maybe too hard to implement...
+
+    return -1
+endfunction

bitbake/contrib/vim/plugin/newbb.vim

@@ -0,0 +1,88 @@
+" Vim plugin file
+" Purpose:	Create a template for new bb files
+" Author:	Ricardo Salveti <rsalveti@gmail.com>
+" Copyright:	Copyright (C) 2008 Ricardo Salveti <rsalveti@gmail.com>
+"
+" This file is licensed under the MIT license, see COPYING.MIT in
+" this source distribution for the terms.
+"
+" Based on the gentoo-syntax package
+"
+" Will try to use git to find the user name and email
+
+if &compatible || v:version < 600 || exists("b:loaded_bitbake_plugin")
+    finish
+endif
+
+fun! <SID>GetUserName()
+    let l:user_name = system("git config --get user.name")
+    if v:shell_error
+        return "Unknown User"
+    else
+        return substitute(l:user_name, "\n", "", "")
+endfun
+
+fun! <SID>GetUserEmail()
+    let l:user_email = system("git config --get user.email")
+    if v:shell_error
+        return "unknown@user.org"
+    else
+        return substitute(l:user_email, "\n", "", "")
+endfun
+
+fun! BBHeader()
+    let l:current_year = strftime("%Y")
+    let l:user_name = <SID>GetUserName()
+    let l:user_email = <SID>GetUserEmail()
+    0 put ='# Copyright (C) ' . l:current_year .
+                \ ' ' . l:user_name . ' <' . l:user_email . '>'
+    put ='# Released under the MIT license (see COPYING.MIT for the terms)'
+    $
+endfun
+
+fun! NewBBTemplate()
+    if line2byte(line('$') + 1) != -1
+        return
+    endif
+
+    let l:paste = &paste
+    set nopaste
+    
+    " Get the header
+    call BBHeader()
+
+    " New the bb template
+    put ='SUMMARY = \"\"'
+    put ='HOMEPAGE = \"\"'
+    put ='LICENSE = \"\"' 
+    put ='SECTION = \"\"'
+    put ='DEPENDS = \"\"'
+    put =''
+    put ='SRC_URI = \"\"'
+
+    " Go to the first place to edit
+    0
+    /^SUMMARY =/
+    exec "normal 2f\""
+
+    if paste == 1
+        set paste
+    endif
+endfun
+
+if !exists("g:bb_create_on_empty")
+    let g:bb_create_on_empty = 1
+endif
+
+" disable in case of vimdiff
+if v:progname =~ "vimdiff"
+    let g:bb_create_on_empty = 0
+endif
+
+augroup NewBB
+    au BufNewFile,BufReadPost *.bb
+                \ if g:bb_create_on_empty |
+                \    call NewBBTemplate() |
+                \ endif
+augroup END
+

bitbake/contrib/vim/plugin/newbbappend.vim

@@ -0,0 +1,46 @@
+" Vim plugin file
+" Purpose:	Create a template for new bbappend file
+" Author:	Joshua Watt <JPEWhacker@gmail.com>
+" Copyright:	Copyright (C) 2017 Joshua Watt <JPEWhacker@gmail.com>
+"
+" This file is licensed under the MIT license, see COPYING.MIT in
+" this source distribution for the terms.
+"
+
+if &compatible || v:version < 600 || exists("b:loaded_bitbake_plugin")
+    finish
+endif
+
+fun! NewBBAppendTemplate()
+    if line2byte(line('$') + 1) != -1
+        return
+    endif
+
+    let l:paste = &paste
+    set nopaste
+
+    " New bbappend template
+    0 put ='FILESEXTRAPATHS:prepend := \"${THISDIR}/${PN}:\"'
+    2
+
+    if paste == 1
+        set paste
+    endif
+endfun
+
+if !exists("g:bb_create_on_empty")
+    let g:bb_create_on_empty = 1
+endif
+
+" disable in case of vimdiff
+if v:progname =~ "vimdiff"
+    let g:bb_create_on_empty = 0
+endif
+
+augroup NewBBAppend
+    au BufNewFile,BufReadPost *.bbappend
+                \ if g:bb_create_on_empty |
+                \    call NewBBAppendTemplate() |
+                \ endif
+augroup END
+

bitbake/contrib/vim/syntax/bitbake.vim

@@ -0,0 +1,129 @@
+" Vim syntax file
+" Language:     BitBake bb/bbclasses/inc
+" Author:       Chris Larson <kergoth@handhelds.org>
+"               Ricardo Salveti <rsalveti@rsalveti.net>
+" Copyright:    Copyright (C) 2004  Chris Larson <kergoth@handhelds.org>
+"               Copyright (C) 2008  Ricardo Salveti <rsalveti@rsalveti.net>
+"
+" This file is licensed under the MIT license, see COPYING.MIT in
+" this source distribution for the terms.
+"
+" Syntax highlighting for bb, bbclasses and inc files.
+"
+" It's an entirely new type, just has specific syntax in shell and python code
+
+if &compatible || v:version < 600 || exists("b:loaded_bitbake_plugin")
+    finish
+endif
+if exists("b:current_syntax")
+    finish
+endif
+
+syn include @python syntax/python.vim
+if exists("b:current_syntax")
+  unlet b:current_syntax
+endif
+
+" BitBake syntax
+
+" Matching case
+syn case match
+
+" Indicates the error when nothing is matched
+syn match bbUnmatched           "."
+
+" Comments
+syn cluster bbCommentGroup      contains=bbTodo,@Spell
+syn keyword bbTodo              COMBAK FIXME TODO XXX contained
+syn match bbComment             "#.*$" contains=@bbCommentGroup
+
+" String helpers
+syn match bbQuote               +['"]+ contained 
+syn match bbDelimiter           "[(){}=]" contained
+syn match bbArrayBrackets       "[\[\]]" contained
+
+" BitBake strings
+syn match bbContinue            "\\$"
+syn region bbString             matchgroup=bbQuote start=+"+ skip=+\\$+ end=+"+ contained contains=bbTodo,bbContinue,bbVarDeref,bbVarPyValue,@Spell
+syn region bbString             matchgroup=bbQuote start=+'+ skip=+\\$+ end=+'+ contained contains=bbTodo,bbContinue,bbVarDeref,bbVarPyValue,@Spell
+
+" Vars definition
+syn match bbExport            "^export" nextgroup=bbIdentifier skipwhite
+syn keyword bbExportFlag        export contained nextgroup=bbIdentifier skipwhite
+syn match bbIdentifier          "[a-zA-Z0-9\-_\.\/\+]\+" display contained
+syn match bbVarDeref            "${[a-zA-Z0-9\-_:\.\/\+]\+}" contained
+syn match bbVarEq               "\(:=\|+=\|=+\|\.=\|=\.\|?=\|??=\|=\)" contained nextgroup=bbVarValue
+syn match bbVarDef              "^\(export\s*\)\?\([a-zA-Z0-9\-_\.\/\+][${}a-zA-Z0-9\-_:\.\/\+]*\)\s*\(:=\|+=\|=+\|\.=\|=\.\|?=\|??=\|=\)\@=" contains=bbExportFlag,bbIdentifier,bbOverrideOperator,bbVarDeref nextgroup=bbVarEq
+syn match bbVarValue            ".*$" contained contains=bbString,bbVarDeref,bbVarPyValue
+syn region bbVarPyValue         start=+${@+ skip=+\\$+ end=+}+ contained contains=@python
+
+" Vars metadata flags
+syn match bbVarFlagDef          "^\([a-zA-Z0-9\-_\.]\+\)\(\[[a-zA-Z0-9\-_\.+]\+\]\)\@=" contains=bbIdentifier nextgroup=bbVarFlagFlag
+syn region bbVarFlagFlag        matchgroup=bbArrayBrackets start="\[" end="\]\s*\(:=\|=\|.=\|=.|+=\|=+\|?=\)\@=" contained contains=bbIdentifier nextgroup=bbVarEq
+
+" Includes and requires
+syn keyword bbInclude           inherit include require contained 
+syn match bbIncludeRest         ".*$" contained contains=bbString,bbVarDeref
+syn match bbIncludeLine         "^\(inherit\|include\|require\)\s\+" contains=bbInclude nextgroup=bbIncludeRest
+
+" Add taks and similar
+syn keyword bbStatement         addtask deltask addhandler after before EXPORT_FUNCTIONS contained
+syn match bbStatementRest       ".*$" skipwhite contained contains=bbStatement
+syn match bbStatementLine       "^\(addtask\|deltask\|addhandler\|after\|before\|EXPORT_FUNCTIONS\)\s\+" contains=bbStatement nextgroup=bbStatementRest
+
+" OE Important Functions
+syn keyword bbOEFunctions       do_fetch do_unpack do_patch do_configure do_compile do_stage do_install do_package contained
+
+" Generic Functions
+syn match bbFunction            "\h[0-9A-Za-z_\-\.]*" display contained contains=bbOEFunctions
+
+syn keyword bbOverrideOperator  append prepend remove contained
+
+" BitBake shell metadata
+syn include @shell syntax/sh.vim
+if exists("b:current_syntax")
+  unlet b:current_syntax
+endif
+syn keyword bbShFakeRootFlag    fakeroot contained
+syn match bbShFuncDef           "^\(fakeroot\s*\)\?\([\.0-9A-Za-z_:${}\-\.]\+\)\(python\)\@<!\(\s*()\s*\)\({\)\@=" contains=bbShFakeRootFlag,bbFunction,bbOverrideOperator,bbVarDeref,bbDelimiter nextgroup=bbShFuncRegion skipwhite
+syn region bbShFuncRegion       matchgroup=bbDelimiter start="{\s*$" end="^}\s*$" contained contains=@shell
+
+" Python value inside shell functions
+syn region shDeref         start=+${@+ skip=+\\$+ excludenl end=+}+ contained contains=@python
+
+" BitBake python metadata
+syn keyword bbPyFlag            python contained
+syn match bbPyFuncDef           "^\(fakeroot\s*\)\?\(python\)\(\s\+[0-9A-Za-z_:${}\-\.]\+\)\?\(\s*()\s*\)\({\)\@=" contains=bbShFakeRootFlag,bbPyFlag,bbFunction,bbOverrideOperator,bbVarDeref,bbDelimiter nextgroup=bbPyFuncRegion skipwhite
+syn region bbPyFuncRegion       matchgroup=bbDelimiter start="{\s*$" end="^}\s*$" contained contains=@python
+
+" BitBake 'def'd python functions
+syn keyword bbPyDef             def contained
+syn region bbPyDefRegion        start='^\(def\s\+\)\([0-9A-Za-z_-]\+\)\(\s*(.*)\s*\):\s*$' end='^\(\s\|$\)\@!' contains=@python
+
+" Highlighting Definitions
+hi def link bbUnmatched         Error
+hi def link bbInclude           Include
+hi def link bbTodo              Todo
+hi def link bbComment           Comment
+hi def link bbQuote             String
+hi def link bbString            String
+hi def link bbDelimiter         Keyword
+hi def link bbArrayBrackets     Statement
+hi def link bbContinue          Special
+hi def link bbExport            Type
+hi def link bbExportFlag        Type
+hi def link bbIdentifier	    Identifier
+hi def link bbVarDeref          PreProc
+hi def link bbVarDef            Identifier
+hi def link bbVarValue          String
+hi def link bbShFakeRootFlag    Type
+hi def link bbFunction          Function
+hi def link bbPyFlag            Type
+hi def link bbPyDef             Statement
+hi def link bbStatement         Statement
+hi def link bbStatementRest     Identifier
+hi def link bbOEFunctions       Special
+hi def link bbVarPyValue        PreProc
+hi def link bbOverrideOperator  Operator
+
+let b:current_syntax = "bb"

bitbake/doc/.gitignore

@@ -0,0 +1 @@
+_build/

bitbake/doc/COPYING.GPL

@@ -0,0 +1,339 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
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+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
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+
+These requirements apply to the modified work as a whole.  If
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+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
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+
+Thus, it is not the intent of this section to claim rights or contest
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+
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+with the Program (or with a work based on the Program) on a volume of
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+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
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+
+  4. You may not copy, modify, sublicense, or distribute the Program
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+otherwise to copy, modify, sublicense or distribute the Program is
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+
+  5. You are not required to accept this License, since you have not
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+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
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+You are not responsible for enforcing compliance by third parties to
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+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
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+
+If any portion of this section is held invalid or unenforceable under
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+
+It is not the purpose of this section to induce you to infringe any
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+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
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+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.

bitbake/doc/COPYING.MIT

@@ -0,0 +1,17 @@
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
+THE USE OR OTHER DEALINGS IN THE SOFTWARE.

bitbake/doc/Makefile

@@ -0,0 +1,35 @@
+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line, and also
+# from the environment for the first two.
+SPHINXOPTS    ?= -W --keep-going -j auto
+SPHINXBUILD   ?= sphinx-build
+SOURCEDIR     = .
+BUILDDIR      = _build
+DESTDIR       = final
+
+ifeq ($(shell if which $(SPHINXBUILD) >/dev/null 2>&1; then echo 1; else echo 0; fi),0)
+$(error "The '$(SPHINXBUILD)' command was not found. Make sure you have Sphinx installed")
+endif
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile clean publish
+
+publish: Makefile html singlehtml
+	rm -rf $(BUILDDIR)/$(DESTDIR)/
+	mkdir -p $(BUILDDIR)/$(DESTDIR)/
+	cp -r $(BUILDDIR)/html/* $(BUILDDIR)/$(DESTDIR)/
+	cp $(BUILDDIR)/singlehtml/index.html $(BUILDDIR)/$(DESTDIR)/singleindex.html
+	sed -i -e 's@index.html#@singleindex.html#@g' $(BUILDDIR)/$(DESTDIR)/singleindex.html
+
+clean:
+	@rm -rf $(BUILDDIR)
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

bitbake/doc/README

@@ -0,0 +1,55 @@
+Documentation
+=============
+
+This is the directory that contains the BitBake documentation. 
+
+Manual Organization
+===================
+
+Folders exist for individual manuals as follows:
+
+* bitbake-user-manual      --- The BitBake User Manual 
+
+Each folder is self-contained regarding content and figures.
+
+If you want to find HTML versions of the BitBake manuals on the web, 
+go to https://www.openembedded.org/wiki/Documentation.
+
+Sphinx
+======
+
+The BitBake documentation was migrated from the original DocBook
+format to Sphinx based documentation for the Yocto Project 3.2
+release.
+
+Additional information related to the Sphinx migration, and guidelines
+for developers willing to contribute to the BitBake documentation can
+be found in the Yocto Project Documentation README file:
+
+https://git.yoctoproject.org/cgit/cgit.cgi/yocto-docs/tree/documentation/README
+
+How to build the Yocto Project documentation
+============================================
+
+Sphinx is written in Python. While it might work with Python2, for
+obvious reasons, we will only support building the BitBake
+documentation with Python3.
+
+Sphinx might be available in your Linux distro packages repositories,
+however it is not recommend using distro packages, as they might be
+old versions, especially if you are using an LTS version of your
+distro. The recommended method to install Sphinx and all required
+dependencies is to use the Python Package Index (pip).
+
+To install all required packages run:
+
+ $ pip3 install sphinx sphinx_rtd_theme pyyaml
+
+To build the documentation locally, run:
+
+ $ cd documentation
+ $ make -f Makefile.sphinx html
+
+The resulting HTML index page will be _build/html/index.html, and you
+can browse your own copy of the locally generated documentation with
+your browser.

bitbake/doc/_templates/breadcrumbs.html

@@ -0,0 +1,14 @@
+{% extends "!breadcrumbs.html" %}
+
+{% block breadcrumbs %}
+    <li>
+      <span class="doctype_switcher_placeholder">{{ doctype or 'single' }}</span>
+      <span class="version_switcher_placeholder">{{ release }}</span>
+    </li>
+    <li> &raquo;</li>
+    {% for doc in parents %}
+      <li><a href="{{ doc.link|e }}">{{ doc.title }}</a> &raquo;</li>
+    {% endfor %}
+    <li>{{ title }}</li>
+{% endblock %}
+

bitbake/doc/_templates/footer.html

@@ -0,0 +1,9 @@
+<footer>
+  <hr/>
+  <div role="contentinfo">
+    <p>&copy; Copyright {{ copyright }}
+       <br>Last updated on {{ last_updated }} from the <a href="https://git.openembedded.org/bitbake/">bitbake</a> git repository.
+    </p>
+  </div>
+</footer>
+

bitbake/doc/_templates/layout.html

@@ -0,0 +1,7 @@
+{% extends "!layout.html" %}
+
+{% block extrabody %}
+<div id="outdated-warning" style="text-align: center; background-color: #FFBABA; color: #6A0E0E;">
+</div>
+{% endblock %}
+

bitbake/doc/bitbake-user-manual/bitbake-user-manual-execution.rst

@@ -0,0 +1,760 @@
+.. SPDX-License-Identifier: CC-BY-2.5
+
+=========
+Execution
+=========
+
+|
+
+The primary purpose for running BitBake is to produce some kind of
+output such as a single installable package, a kernel, a software
+development kit, or even a full, board-specific bootable Linux image,
+complete with bootloader, kernel, and root filesystem. Of course, you
+can execute the ``bitbake`` command with options that cause it to
+execute single tasks, compile single recipe files, capture or clear
+data, or simply return information about the execution environment.
+
+This chapter describes BitBake's execution process from start to finish
+when you use it to create an image. The execution process is launched
+using the following command form::
+
+  $ bitbake target
+
+For information on
+the BitBake command and its options, see ":ref:`The BitBake Command
+<bitbake-user-manual-command>`" section.
+
+.. note::
+
+   Prior to executing BitBake, you should take advantage of available
+   parallel thread execution on your build host by setting the
+   :term:`BB_NUMBER_THREADS` variable in
+   your project's ``local.conf`` configuration file.
+
+   A common method to determine this value for your build host is to run
+   the following::
+
+     $ grep processor /proc/cpuinfo
+
+   This command returns
+   the number of processors, which takes into account hyper-threading.
+   Thus, a quad-core build host with hyper-threading most likely shows
+   eight processors, which is the value you would then assign to
+   :term:`BB_NUMBER_THREADS`.
+
+   A possibly simpler solution is that some Linux distributions (e.g.
+   Debian and Ubuntu) provide the ``ncpus`` command.
+
+Parsing the Base Configuration Metadata
+=======================================
+
+The first thing BitBake does is parse base configuration metadata. Base
+configuration metadata consists of your project's ``bblayers.conf`` file
+to determine what layers BitBake needs to recognize, all necessary
+``layer.conf`` files (one from each layer), and ``bitbake.conf``. The
+data itself is of various types:
+
+-  **Recipes:** Details about particular pieces of software.
+
+-  **Class Data:** An abstraction of common build information (e.g. how to
+   build a Linux kernel).
+
+-  **Configuration Data:** Machine-specific settings, policy decisions,
+   and so forth. Configuration data acts as the glue to bind everything
+   together.
+
+The ``layer.conf`` files are used to construct key variables such as
+:term:`BBPATH` and :term:`BBFILES`.
+:term:`BBPATH` is used to search for configuration and class files under the
+``conf`` and ``classes`` directories, respectively. :term:`BBFILES` is used
+to locate both recipe and recipe append files (``.bb`` and
+``.bbappend``). If there is no ``bblayers.conf`` file, it is assumed the
+user has set the :term:`BBPATH` and :term:`BBFILES` directly in the environment.
+
+Next, the ``bitbake.conf`` file is located using the :term:`BBPATH` variable
+that was just constructed. The ``bitbake.conf`` file may also include
+other configuration files using the ``include`` or ``require``
+directives.
+
+Prior to parsing configuration files, BitBake looks at certain
+variables, including:
+
+-  :term:`BB_ENV_PASSTHROUGH`
+-  :term:`BB_ENV_PASSTHROUGH_ADDITIONS`
+-  :term:`BB_PRESERVE_ENV`
+-  :term:`BB_ORIGENV`
+-  :term:`BITBAKE_UI`
+
+The first four variables in this list relate to how BitBake treats shell
+environment variables during task execution. By default, BitBake cleans
+the environment variables and provides tight control over the shell
+execution environment. However, through the use of these first four
+variables, you can apply your control regarding the environment
+variables allowed to be used by BitBake in the shell during execution of
+tasks. See the
+":ref:`bitbake-user-manual/bitbake-user-manual-metadata:Passing Information Into the Build Task Environment`"
+section and the information about these variables in the variable
+glossary for more information on how they work and on how to use them.
+
+The base configuration metadata is global and therefore affects all
+recipes and tasks that are executed.
+
+BitBake first searches the current working directory for an optional
+``conf/bblayers.conf`` configuration file. This file is expected to
+contain a :term:`BBLAYERS` variable that is a
+space-delimited list of 'layer' directories. Recall that if BitBake
+cannot find a ``bblayers.conf`` file, then it is assumed the user has
+set the :term:`BBPATH` and :term:`BBFILES` variables directly in the
+environment.
+
+For each directory (layer) in this list, a ``conf/layer.conf`` file is
+located and parsed with the :term:`LAYERDIR` variable
+being set to the directory where the layer was found. The idea is these
+files automatically set up :term:`BBPATH` and other
+variables correctly for a given build directory.
+
+BitBake then expects to find the ``conf/bitbake.conf`` file somewhere in
+the user-specified :term:`BBPATH`. That configuration file generally has
+include directives to pull in any other metadata such as files specific
+to the architecture, the machine, the local environment, and so forth.
+
+Only variable definitions and include directives are allowed in BitBake
+``.conf`` files. Some variables directly influence BitBake's behavior.
+These variables might have been set from the environment depending on
+the environment variables previously mentioned or set in the
+configuration files. The ":ref:`bitbake-user-manual/bitbake-user-manual-ref-variables:Variables Glossary`"
+chapter presents a full list of
+variables.
+
+After parsing configuration files, BitBake uses its rudimentary
+inheritance mechanism, which is through class files, to inherit some
+standard classes. BitBake parses a class when the inherit directive
+responsible for getting that class is encountered.
+
+The ``base.bbclass`` file is always included. Other classes that are
+specified in the configuration using the
+:term:`INHERIT` variable are also included. BitBake
+searches for class files in a ``classes`` subdirectory under the paths
+in :term:`BBPATH` in the same way as configuration files.
+
+A good way to get an idea of the configuration files and the class files
+used in your execution environment is to run the following BitBake
+command::
+
+  $ bitbake -e > mybb.log
+
+Examining the top of the ``mybb.log``
+shows you the many configuration files and class files used in your
+execution environment.
+
+.. note::
+
+   You need to be aware of how BitBake parses curly braces. If a recipe
+   uses a closing curly brace within the function and the character has
+   no leading spaces, BitBake produces a parsing error. If you use a
+   pair of curly braces in a shell function, the closing curly brace
+   must not be located at the start of the line without leading spaces.
+
+   Here is an example that causes BitBake to produce a parsing error::
+
+      fakeroot create_shar() {
+         cat << "EOF" > ${SDK_DEPLOY}/${TOOLCHAIN_OUTPUTNAME}.sh
+      usage()
+      {
+         echo "test"
+         ######  The following "}" at the start of the line causes a parsing error ######
+      }
+      EOF
+      }
+
+      Writing the recipe this way avoids the error:
+      fakeroot create_shar() {
+         cat << "EOF" > ${SDK_DEPLOY}/${TOOLCHAIN_OUTPUTNAME}.sh
+      usage()
+      {
+         echo "test"
+         ###### The following "}" with a leading space at the start of the line avoids the error ######
+       }
+      EOF
+      }
+
+Locating and Parsing Recipes
+============================
+
+During the configuration phase, BitBake will have set
+:term:`BBFILES`. BitBake now uses it to construct a
+list of recipes to parse, along with any append files (``.bbappend``) to
+apply. :term:`BBFILES` is a space-separated list of available files and
+supports wildcards. An example would be::
+
+  BBFILES = "/path/to/bbfiles/*.bb /path/to/appends/*.bbappend"
+
+BitBake parses each
+recipe and append file located with :term:`BBFILES` and stores the values of
+various variables into the datastore.
+
+.. note::
+
+   Append files are applied in the order they are encountered in BBFILES.
+
+For each file, a fresh copy of the base configuration is made, then the
+recipe is parsed line by line. Any inherit statements cause BitBake to
+find and then parse class files (``.bbclass``) using
+:term:`BBPATH` as the search path. Finally, BitBake
+parses in order any append files found in :term:`BBFILES`.
+
+One common convention is to use the recipe filename to define pieces of
+metadata. For example, in ``bitbake.conf`` the recipe name and version
+are used to set the variables :term:`PN` and
+:term:`PV`::
+
+   PN = "${@bb.parse.vars_from_file(d.getVar('FILE', False),d)[0] or 'defaultpkgname'}"
+   PV = "${@bb.parse.vars_from_file(d.getVar('FILE', False),d)[1] or '1.0'}"
+
+In this example, a recipe called "something_1.2.3.bb" would set
+:term:`PN` to "something" and :term:`PV` to "1.2.3".
+
+By the time parsing is complete for a recipe, BitBake has a list of
+tasks that the recipe defines and a set of data consisting of keys and
+values as well as dependency information about the tasks.
+
+BitBake does not need all of this information. It only needs a small
+subset of the information to make decisions about the recipe.
+Consequently, BitBake caches the values in which it is interested and
+does not store the rest of the information. Experience has shown it is
+faster to re-parse the metadata than to try and write it out to the disk
+and then reload it.
+
+Where possible, subsequent BitBake commands reuse this cache of recipe
+information. The validity of this cache is determined by first computing
+a checksum of the base configuration data (see
+:term:`BB_HASHCONFIG_IGNORE_VARS`) and
+then checking if the checksum matches. If that checksum matches what is
+in the cache and the recipe and class files have not changed, BitBake is
+able to use the cache. BitBake then reloads the cached information about
+the recipe instead of reparsing it from scratch.
+
+Recipe file collections exist to allow the user to have multiple
+repositories of ``.bb`` files that contain the same exact package. For
+example, one could easily use them to make one's own local copy of an
+upstream repository, but with custom modifications that one does not
+want upstream. Here is an example::
+
+  BBFILES = "/stuff/openembedded/*/*.bb /stuff/openembedded.modified/*/*.bb"
+  BBFILE_COLLECTIONS = "upstream local"
+  BBFILE_PATTERN_upstream = "^/stuff/openembedded/"
+  BBFILE_PATTERN_local = "^/stuff/openembedded.modified/"
+  BBFILE_PRIORITY_upstream = "5"
+  BBFILE_PRIORITY_local = "10"
+
+.. note::
+
+   The layers mechanism is now the preferred method of collecting code.
+   While the collections code remains, its main use is to set layer
+   priorities and to deal with overlap (conflicts) between layers.
+
+.. _bb-bitbake-providers:
+
+Providers
+=========
+
+Assuming BitBake has been instructed to execute a target and that all
+the recipe files have been parsed, BitBake starts to figure out how to
+build the target. BitBake looks through the :term:`PROVIDES` list for each
+of the recipes. A :term:`PROVIDES` list is the list of names by which the
+recipe can be known. Each recipe's :term:`PROVIDES` list is created
+implicitly through the recipe's :term:`PN` variable and
+explicitly through the recipe's :term:`PROVIDES`
+variable, which is optional.
+
+When a recipe uses :term:`PROVIDES`, that recipe's functionality can be
+found under an alternative name or names other than the implicit :term:`PN`
+name. As an example, suppose a recipe named ``keyboard_1.0.bb``
+contained the following::
+
+  PROVIDES += "fullkeyboard"
+
+The :term:`PROVIDES`
+list for this recipe becomes "keyboard", which is implicit, and
+"fullkeyboard", which is explicit. Consequently, the functionality found
+in ``keyboard_1.0.bb`` can be found under two different names.
+
+.. _bb-bitbake-preferences:
+
+Preferences
+===========
+
+The :term:`PROVIDES` list is only part of the solution for figuring out a
+target's recipes. Because targets might have multiple providers, BitBake
+needs to prioritize providers by determining provider preferences.
+
+A common example in which a target has multiple providers is
+"virtual/kernel", which is on the :term:`PROVIDES` list for each kernel
+recipe. Each machine often selects the best kernel provider by using a
+line similar to the following in the machine configuration file::
+
+  PREFERRED_PROVIDER_virtual/kernel = "linux-yocto"
+
+The default :term:`PREFERRED_PROVIDER` is the provider
+with the same name as the target. BitBake iterates through each target
+it needs to build and resolves them and their dependencies using this
+process.
+
+Understanding how providers are chosen is made complicated by the fact
+that multiple versions might exist for a given provider. BitBake
+defaults to the highest version of a provider. Version comparisons are
+made using the same method as Debian. You can use the
+:term:`PREFERRED_VERSION` variable to
+specify a particular version. You can influence the order by using the
+:term:`DEFAULT_PREFERENCE` variable.
+
+By default, files have a preference of "0". Setting
+:term:`DEFAULT_PREFERENCE` to "-1" makes the recipe unlikely to be used
+unless it is explicitly referenced. Setting :term:`DEFAULT_PREFERENCE` to
+"1" makes it likely the recipe is used. :term:`PREFERRED_VERSION` overrides
+any :term:`DEFAULT_PREFERENCE` setting. :term:`DEFAULT_PREFERENCE` is often used
+to mark newer and more experimental recipe versions until they have
+undergone sufficient testing to be considered stable.
+
+When there are multiple "versions" of a given recipe, BitBake defaults
+to selecting the most recent version, unless otherwise specified. If the
+recipe in question has a
+:term:`DEFAULT_PREFERENCE` set lower than
+the other recipes (default is 0), then it will not be selected. This
+allows the person or persons maintaining the repository of recipe files
+to specify their preference for the default selected version.
+Additionally, the user can specify their preferred version.
+
+If the first recipe is named ``a_1.1.bb``, then the
+:term:`PN` variable will be set to "a", and the
+:term:`PV` variable will be set to 1.1.
+
+Thus, if a recipe named ``a_1.2.bb`` exists, BitBake will choose 1.2 by
+default. However, if you define the following variable in a ``.conf``
+file that BitBake parses, you can change that preference::
+
+  PREFERRED_VERSION_a = "1.1"
+
+.. note::
+
+   It is common for a recipe to provide two versions -- a stable,
+   numbered (and preferred) version, and a version that is automatically
+   checked out from a source code repository that is considered more
+   "bleeding edge" but can be selected only explicitly.
+
+   For example, in the OpenEmbedded codebase, there is a standard,
+   versioned recipe file for BusyBox, ``busybox_1.22.1.bb``, but there
+   is also a Git-based version, ``busybox_git.bb``, which explicitly
+   contains the line ::
+
+     DEFAULT_PREFERENCE = "-1"
+
+   to ensure that the
+   numbered, stable version is always preferred unless the developer
+   selects otherwise.
+
+.. _bb-bitbake-dependencies:
+
+Dependencies
+============
+
+Each target BitBake builds consists of multiple tasks such as ``fetch``,
+``unpack``, ``patch``, ``configure``, and ``compile``. For best
+performance on multi-core systems, BitBake considers each task as an
+independent entity with its own set of dependencies.
+
+Dependencies are defined through several variables. You can find
+information about variables BitBake uses in the
+:doc:`bitbake-user-manual-ref-variables` near the end of this manual. At a
+basic level, it is sufficient to know that BitBake uses the
+:term:`DEPENDS` and
+:term:`RDEPENDS` variables when calculating
+dependencies.
+
+For more information on how BitBake handles dependencies, see the
+:ref:`bitbake-user-manual/bitbake-user-manual-metadata:Dependencies`
+section.
+
+.. _ref-bitbake-tasklist:
+
+The Task List
+=============
+
+Based on the generated list of providers and the dependency information,
+BitBake can now calculate exactly what tasks it needs to run and in what
+order it needs to run them. The
+:ref:`bitbake-user-manual/bitbake-user-manual-execution:executing tasks`
+section has more information on how BitBake chooses which task to
+execute next.
+
+The build now starts with BitBake forking off threads up to the limit
+set in the :term:`BB_NUMBER_THREADS`
+variable. BitBake continues to fork threads as long as there are tasks
+ready to run, those tasks have all their dependencies met, and the
+thread threshold has not been exceeded.
+
+It is worth noting that you can greatly speed up the build time by
+properly setting the :term:`BB_NUMBER_THREADS` variable.
+
+As each task completes, a timestamp is written to the directory
+specified by the :term:`STAMP` variable. On subsequent
+runs, BitBake looks in the build directory within ``tmp/stamps`` and
+does not rerun tasks that are already completed unless a timestamp is
+found to be invalid. Currently, invalid timestamps are only considered
+on a per recipe file basis. So, for example, if the configure stamp has
+a timestamp greater than the compile timestamp for a given target, then
+the compile task would rerun. Running the compile task again, however,
+has no effect on other providers that depend on that target.
+
+The exact format of the stamps is partly configurable. In modern
+versions of BitBake, a hash is appended to the stamp so that if the
+configuration changes, the stamp becomes invalid and the task is
+automatically rerun. This hash, or signature used, is governed by the
+signature policy that is configured (see the
+:ref:`bitbake-user-manual/bitbake-user-manual-execution:checksums (signatures)`
+section for information). It is also
+possible to append extra metadata to the stamp using the
+``[stamp-extra-info]`` task flag. For example, OpenEmbedded uses this
+flag to make some tasks machine-specific.
+
+.. note::
+
+   Some tasks are marked as "nostamp" tasks. No timestamp file is
+   created when these tasks are run. Consequently, "nostamp" tasks are
+   always rerun.
+
+For more information on tasks, see the
+:ref:`bitbake-user-manual/bitbake-user-manual-metadata:tasks` section.
+
+Executing Tasks
+===============
+
+Tasks can be either a shell task or a Python task. For shell tasks,
+BitBake writes a shell script to
+``${``\ :term:`T`\ ``}/run.do_taskname.pid`` and then
+executes the script. The generated shell script contains all the
+exported variables, and the shell functions with all variables expanded.
+Output from the shell script goes to the file
+``${``\ :term:`T`\ ``}/log.do_taskname.pid``. Looking at the expanded shell functions in
+the run file and the output in the log files is a useful debugging
+technique.
+
+For Python tasks, BitBake executes the task internally and logs
+information to the controlling terminal. Future versions of BitBake will
+write the functions to files similar to the way shell tasks are handled.
+Logging will be handled in a way similar to shell tasks as well.
+
+The order in which BitBake runs the tasks is controlled by its task
+scheduler. It is possible to configure the scheduler and define custom
+implementations for specific use cases. For more information, see these
+variables that control the behavior:
+
+-  :term:`BB_SCHEDULER`
+
+-  :term:`BB_SCHEDULERS`
+
+It is possible to have functions run before and after a task's main
+function. This is done using the ``[prefuncs]`` and ``[postfuncs]``
+flags of the task that lists the functions to run.
+
+.. _checksums:
+
+Checksums (Signatures)
+======================
+
+A checksum is a unique signature of a task's inputs. The signature of a
+task can be used to determine if a task needs to be run. Because it is a
+change in a task's inputs that triggers running the task, BitBake needs
+to detect all the inputs to a given task. For shell tasks, this turns
+out to be fairly easy because BitBake generates a "run" shell script for
+each task and it is possible to create a checksum that gives you a good
+idea of when the task's data changes.
+
+To complicate the problem, some things should not be included in the
+checksum. First, there is the actual specific build path of a given task
+- the working directory. It does not matter if the working directory
+changes because it should not affect the output for target packages. The
+simplistic approach for excluding the working directory is to set it to
+some fixed value and create the checksum for the "run" script. BitBake
+goes one step better and uses the
+:term:`BB_BASEHASH_IGNORE_VARS` variable
+to define a list of variables that should never be included when
+generating the signatures.
+
+Another problem results from the "run" scripts containing functions that
+might or might not get called. The incremental build solution contains
+code that figures out dependencies between shell functions. This code is
+used to prune the "run" scripts down to the minimum set, thereby
+alleviating this problem and making the "run" scripts much more readable
+as a bonus.
+
+So far we have solutions for shell scripts. What about Python tasks? The
+same approach applies even though these tasks are more difficult. The
+process needs to figure out what variables a Python function accesses
+and what functions it calls. Again, the incremental build solution
+contains code that first figures out the variable and function
+dependencies, and then creates a checksum for the data used as the input
+to the task.
+
+Like the working directory case, situations exist where dependencies
+should be ignored. For these cases, you can instruct the build process
+to ignore a dependency by using a line like the following::
+
+  PACKAGE_ARCHS[vardepsexclude] = "MACHINE"
+
+This example ensures that the
+``PACKAGE_ARCHS`` variable does not depend on the value of ``MACHINE``,
+even if it does reference it.
+
+Equally, there are cases where we need to add dependencies BitBake is
+not able to find. You can accomplish this by using a line like the
+following::
+
+  PACKAGE_ARCHS[vardeps] = "MACHINE"
+
+This example explicitly
+adds the ``MACHINE`` variable as a dependency for ``PACKAGE_ARCHS``.
+
+Consider a case with in-line Python, for example, where BitBake is not
+able to figure out dependencies. When running in debug mode (i.e. using
+``-DDD``), BitBake produces output when it discovers something for which
+it cannot figure out dependencies.
+
+Thus far, this section has limited discussion to the direct inputs into
+a task. Information based on direct inputs is referred to as the
+"basehash" in the code. However, there is still the question of a task's
+indirect inputs --- the things that were already built and present in the
+build directory. The checksum (or signature) for a particular task needs
+to add the hashes of all the tasks on which the particular task depends.
+Choosing which dependencies to add is a policy decision. However, the
+effect is to generate a master checksum that combines the basehash and
+the hashes of the task's dependencies.
+
+At the code level, there are a variety of ways both the basehash and the
+dependent task hashes can be influenced. Within the BitBake
+configuration file, we can give BitBake some extra information to help
+it construct the basehash. The following statement effectively results
+in a list of global variable dependency excludes --- variables never
+included in any checksum. This example uses variables from OpenEmbedded
+to help illustrate the concept::
+
+   BB_BASEHASH_IGNORE_VARS ?= "TMPDIR FILE PATH PWD BB_TASKHASH BBPATH DL_DIR \
+       SSTATE_DIR THISDIR FILESEXTRAPATHS FILE_DIRNAME HOME LOGNAME SHELL \
+       USER FILESPATH STAGING_DIR_HOST STAGING_DIR_TARGET COREBASE PRSERV_HOST \
+       PRSERV_DUMPDIR PRSERV_DUMPFILE PRSERV_LOCKDOWN PARALLEL_MAKE \
+       CCACHE_DIR EXTERNAL_TOOLCHAIN CCACHE CCACHE_DISABLE LICENSE_PATH SDKPKGSUFFIX"
+
+The previous example excludes the work directory, which is part of
+``TMPDIR``.
+
+The rules for deciding which hashes of dependent tasks to include
+through dependency chains are more complex and are generally
+accomplished with a Python function. The code in
+``meta/lib/oe/sstatesig.py`` shows two examples of this and also
+illustrates how you can insert your own policy into the system if so
+desired. This file defines the basic signature generator
+OpenEmbedded-Core uses: "OEBasicHash". By default, there
+is a dummy "noop" signature handler enabled in BitBake. This means that
+behavior is unchanged from previous versions. ``OE-Core`` uses the
+"OEBasicHash" signature handler by default through this setting in the
+``bitbake.conf`` file::
+
+  BB_SIGNATURE_HANDLER ?= "OEBasicHash"
+
+The main feature of the "OEBasicHash" :term:`BB_SIGNATURE_HANDLER` is that
+it adds the task hash to the stamp files. Thanks to this, any metadata
+change will change the task hash, automatically causing the task to be run
+again. This removes the need to bump :term:`PR` values, and changes to
+metadata automatically ripple across the build.
+
+It is also worth noting that the end result of signature
+generators is to make some dependency and hash information available to
+the build. This information includes:
+
+-  ``BB_BASEHASH_task-``\ *taskname*: The base hashes for each task in the
+   recipe.
+
+-  ``BB_BASEHASH_``\ *filename:taskname*: The base hashes for each
+   dependent task.
+
+-  :term:`BB_TASKHASH`: The hash of the currently running task.
+
+It is worth noting that BitBake's "-S" option lets you debug BitBake's
+processing of signatures. The options passed to -S allow different
+debugging modes to be used, either using BitBake's own debug functions
+or possibly those defined in the metadata/signature handler itself. The
+simplest parameter to pass is "none", which causes a set of signature
+information to be written out into ``STAMPS_DIR`` corresponding to the
+targets specified. The other currently available parameter is
+"printdiff", which causes BitBake to try to establish the closest
+signature match it can (e.g. in the sstate cache) and then run
+``bitbake-diffsigs`` over the matches to determine the stamps and delta
+where these two stamp trees diverge.
+
+.. note::
+
+   It is likely that future versions of BitBake will provide other
+   signature handlers triggered through additional "-S" parameters.
+
+You can find more information on checksum metadata in the
+:ref:`bitbake-user-manual/bitbake-user-manual-metadata:task checksums and setscene`
+section.
+
+Setscene
+========
+
+The setscene process enables BitBake to handle "pre-built" artifacts.
+The ability to handle and reuse these artifacts allows BitBake the
+luxury of not having to build something from scratch every time.
+Instead, BitBake can use, when possible, existing build artifacts.
+
+BitBake needs to have reliable data indicating whether or not an
+artifact is compatible. Signatures, described in the previous section,
+provide an ideal way of representing whether an artifact is compatible.
+If a signature is the same, an object can be reused.
+
+If an object can be reused, the problem then becomes how to replace a
+given task or set of tasks with the pre-built artifact. BitBake solves
+the problem with the "setscene" process.
+
+When BitBake is asked to build a given target, before building anything,
+it first asks whether cached information is available for any of the
+targets it's building, or any of the intermediate targets. If cached
+information is available, BitBake uses this information instead of
+running the main tasks.
+
+BitBake first calls the function defined by the
+:term:`BB_HASHCHECK_FUNCTION` variable
+with a list of tasks and corresponding hashes it wants to build. This
+function is designed to be fast and returns a list of the tasks for
+which it believes in can obtain artifacts.
+
+Next, for each of the tasks that were returned as possibilities, BitBake
+executes a setscene version of the task that the possible artifact
+covers. Setscene versions of a task have the string "_setscene" appended
+to the task name. So, for example, the task with the name ``xxx`` has a
+setscene task named ``xxx_setscene``. The setscene version of the task
+executes and provides the necessary artifacts returning either success
+or failure.
+
+As previously mentioned, an artifact can cover more than one task. For
+example, it is pointless to obtain a compiler if you already have the
+compiled binary. To handle this, BitBake calls the
+:term:`BB_SETSCENE_DEPVALID` function for
+each successful setscene task to know whether or not it needs to obtain
+the dependencies of that task.
+
+You can find more information on setscene metadata in the
+:ref:`bitbake-user-manual/bitbake-user-manual-metadata:task checksums and setscene`
+section.
+
+Logging
+=======
+
+In addition to the standard command line option to control how verbose
+builds are when execute, bitbake also supports user defined
+configuration of the `Python
+logging <https://docs.python.org/3/library/logging.html>`__ facilities
+through the :term:`BB_LOGCONFIG` variable. This
+variable defines a JSON or YAML `logging
+configuration <https://docs.python.org/3/library/logging.config.html>`__
+that will be intelligently merged into the default configuration. The
+logging configuration is merged using the following rules:
+
+-  The user defined configuration will completely replace the default
+   configuration if top level key ``bitbake_merge`` is set to the value
+   ``False``. In this case, all other rules are ignored.
+
+-  The user configuration must have a top level ``version`` which must
+   match the value of the default configuration.
+
+-  Any keys defined in the ``handlers``, ``formatters``, or ``filters``,
+   will be merged into the same section in the default configuration,
+   with the user specified keys taking replacing a default one if there
+   is a conflict. In practice, this means that if both the default
+   configuration and user configuration specify a handler named
+   ``myhandler``, the user defined one will replace the default. To
+   prevent the user from inadvertently replacing a default handler,
+   formatter, or filter, all of the default ones are named with a prefix
+   of "``BitBake.``"
+
+-  If a logger is defined by the user with the key ``bitbake_merge`` set
+   to ``False``, that logger will be completely replaced by user
+   configuration. In this case, no other rules will apply to that
+   logger.
+
+-  All user defined ``filter`` and ``handlers`` properties for a given
+   logger will be merged with corresponding properties from the default
+   logger. For example, if the user configuration adds a filter called
+   ``myFilter`` to the ``BitBake.SigGen``, and the default configuration
+   adds a filter called ``BitBake.defaultFilter``, both filters will be
+   applied to the logger
+
+As a first example, you can create a ``hashequiv.json`` user logging
+configuration file to log all Hash Equivalence related messages of ``VERBOSE``
+or higher priority to a file called ``hashequiv.log``::
+
+   {
+       "version": 1,
+       "handlers": {
+           "autobuilderlog": {
+               "class": "logging.FileHandler",
+               "formatter": "logfileFormatter",
+               "level": "DEBUG",
+               "filename": "hashequiv.log",
+               "mode": "w"
+           }
+       },
+       "formatters": {
+               "logfileFormatter": {
+                   "format": "%(name)s: %(levelname)s: %(message)s"
+               }
+       },
+       "loggers": {
+           "BitBake.SigGen.HashEquiv": {
+               "level": "VERBOSE",
+               "handlers": ["autobuilderlog"]
+           },
+           "BitBake.RunQueue.HashEquiv": {
+               "level": "VERBOSE",
+               "handlers": ["autobuilderlog"]
+           }
+       }
+   }
+
+Then set the :term:`BB_LOGCONFIG` variable in ``conf/local.conf``::
+
+   BB_LOGCONFIG = "hashequiv.json"
+
+Another example is this ``warn.json`` file to log all ``WARNING`` and
+higher priority messages to a ``warn.log`` file::
+
+  {
+      "version": 1,
+      "formatters": {
+          "warnlogFormatter": {
+              "()": "bb.msg.BBLogFormatter",
+              "format": "%(levelname)s: %(message)s"
+          }
+      },
+
+      "handlers": {
+          "warnlog": {
+              "class": "logging.FileHandler",
+              "formatter": "warnlogFormatter",
+              "level": "WARNING",
+              "filename": "warn.log"
+          }
+      },
+
+      "loggers": {
+          "BitBake": {
+              "handlers": ["warnlog"]
+          }
+      },
+
+      "@disable_existing_loggers": false
+  }
+
+Note that BitBake's helper classes for structured logging are implemented in
+``lib/bb/msg.py``.

bitbake/doc/bitbake-user-manual/bitbake-user-manual-fetching.rst

@@ -0,0 +1,806 @@
+.. SPDX-License-Identifier: CC-BY-2.5
+
+=====================
+File Download Support
+=====================
+
+|
+
+BitBake's fetch module is a standalone piece of library code that deals
+with the intricacies of downloading source code and files from remote
+systems. Fetching source code is one of the cornerstones of building
+software. As such, this module forms an important part of BitBake.
+
+The current fetch module is called "fetch2" and refers to the fact that
+it is the second major version of the API. The original version is
+obsolete and has been removed from the codebase. Thus, in all cases,
+"fetch" refers to "fetch2" in this manual.
+
+The Download (Fetch)
+====================
+
+BitBake takes several steps when fetching source code or files. The
+fetcher codebase deals with two distinct processes in order: obtaining
+the files from somewhere (cached or otherwise) and then unpacking those
+files into a specific location and perhaps in a specific way. Getting
+and unpacking the files is often optionally followed by patching.
+Patching, however, is not covered by this module.
+
+The code to execute the first part of this process, a fetch, looks
+something like the following::
+
+   src_uri = (d.getVar('SRC_URI') or "").split()
+   fetcher = bb.fetch2.Fetch(src_uri, d)
+   fetcher.download()
+
+This code sets up an instance of the fetch class. The instance uses a
+space-separated list of URLs from the :term:`SRC_URI`
+variable and then calls the ``download`` method to download the files.
+
+The instantiation of the fetch class is usually followed by::
+
+   rootdir = l.getVar('WORKDIR')
+   fetcher.unpack(rootdir)
+
+This code unpacks the downloaded files to the specified by ``WORKDIR``.
+
+.. note::
+
+   For convenience, the naming in these examples matches the variables
+   used by OpenEmbedded. If you want to see the above code in action,
+   examine the OpenEmbedded class file ``base.bbclass``
+   .
+
+The :term:`SRC_URI` and ``WORKDIR`` variables are not hardcoded into the
+fetcher, since those fetcher methods can be (and are) called with
+different variable names. In OpenEmbedded for example, the shared state
+(sstate) code uses the fetch module to fetch the sstate files.
+
+When the ``download()`` method is called, BitBake tries to resolve the
+URLs by looking for source files in a specific search order:
+
+-  *Pre-mirror Sites:* BitBake first uses pre-mirrors to try and find
+   source files. These locations are defined using the
+   :term:`PREMIRRORS` variable.
+
+-  *Source URI:* If pre-mirrors fail, BitBake uses the original URL (e.g
+   from :term:`SRC_URI`).
+
+-  *Mirror Sites:* If fetch failures occur, BitBake next uses mirror
+   locations as defined by the :term:`MIRRORS` variable.
+
+For each URL passed to the fetcher, the fetcher calls the submodule that
+handles that particular URL type. This behavior can be the source of
+some confusion when you are providing URLs for the :term:`SRC_URI` variable.
+Consider the following two URLs::
+
+   https://git.yoctoproject.org/git/poky;protocol=git
+   git://git.yoctoproject.org/git/poky;protocol=http
+
+In the former case, the URL is passed to the ``wget`` fetcher, which does not
+understand "git". Therefore, the latter case is the correct form since the Git
+fetcher does know how to use HTTP as a transport.
+
+Here are some examples that show commonly used mirror definitions::
+
+   PREMIRRORS ?= "\
+      bzr://.*/.\*  http://somemirror.org/sources/ \
+      cvs://.*/.\*  http://somemirror.org/sources/ \
+      git://.*/.\*  http://somemirror.org/sources/ \
+      hg://.*/.\*   http://somemirror.org/sources/ \
+      osc://.*/.\*  http://somemirror.org/sources/ \
+      p4://.*/.\*   http://somemirror.org/sources/ \
+     svn://.*/.\*   http://somemirror.org/sources/"
+
+   MIRRORS =+ "\
+      ftp://.*/.\*   http://somemirror.org/sources/ \
+      http://.*/.\*  http://somemirror.org/sources/ \
+      https://.*/.\* http://somemirror.org/sources/"
+
+It is useful to note that BitBake
+supports cross-URLs. It is possible to mirror a Git repository on an
+HTTP server as a tarball. This is what the ``git://`` mapping in the
+previous example does.
+
+Since network accesses are slow, BitBake maintains a cache of files
+downloaded from the network. Any source files that are not local (i.e.
+downloaded from the Internet) are placed into the download directory,
+which is specified by the :term:`DL_DIR` variable.
+
+File integrity is of key importance for reproducing builds. For
+non-local archive downloads, the fetcher code can verify SHA-256 and MD5
+checksums to ensure the archives have been downloaded correctly. You can
+specify these checksums by using the :term:`SRC_URI` variable with the
+appropriate varflags as follows::
+
+   SRC_URI[md5sum] = "value"
+   SRC_URI[sha256sum] = "value"
+
+You can also specify the checksums as
+parameters on the :term:`SRC_URI` as shown below::
+
+  SRC_URI = "http://example.com/foobar.tar.bz2;md5sum=4a8e0f237e961fd7785d19d07fdb994d"
+
+If multiple URIs exist, you can specify the checksums either directly as
+in the previous example, or you can name the URLs. The following syntax
+shows how you name the URIs::
+
+   SRC_URI = "http://example.com/foobar.tar.bz2;name=foo"
+   SRC_URI[foo.md5sum] = 4a8e0f237e961fd7785d19d07fdb994d
+
+After a file has been downloaded and
+has had its checksum checked, a ".done" stamp is placed in :term:`DL_DIR`.
+BitBake uses this stamp during subsequent builds to avoid downloading or
+comparing a checksum for the file again.
+
+.. note::
+
+   It is assumed that local storage is safe from data corruption. If
+   this were not the case, there would be bigger issues to worry about.
+
+If :term:`BB_STRICT_CHECKSUM` is set, any
+download without a checksum triggers an error message. The
+:term:`BB_NO_NETWORK` variable can be used to
+make any attempted network access a fatal error, which is useful for
+checking that mirrors are complete as well as other things.
+
+If :term:`BB_CHECK_SSL_CERTS` is set to ``0`` then SSL certificate checking will
+be disabled. This variable defaults to ``1`` so SSL certificates are normally
+checked.
+
+.. _bb-the-unpack:
+
+The Unpack
+==========
+
+The unpack process usually immediately follows the download. For all
+URLs except Git URLs, BitBake uses the common ``unpack`` method.
+
+A number of parameters exist that you can specify within the URL to
+govern the behavior of the unpack stage:
+
+-  *unpack:* Controls whether the URL components are unpacked. If set to
+   "1", which is the default, the components are unpacked. If set to
+   "0", the unpack stage leaves the file alone. This parameter is useful
+   when you want an archive to be copied in and not be unpacked.
+
+-  *dos:* Applies to ``.zip`` and ``.jar`` files and specifies whether
+   to use DOS line ending conversion on text files.
+
+-  *striplevel:* Strip specified number of leading components (levels)
+   from file names on extraction
+
+-  *subdir:* Unpacks the specific URL to the specified subdirectory
+   within the root directory.
+
+The unpack call automatically decompresses and extracts files with ".Z",
+".z", ".gz", ".xz", ".zip", ".jar", ".ipk", ".rpm". ".srpm", ".deb" and
+".bz2" extensions as well as various combinations of tarball extensions.
+
+As mentioned, the Git fetcher has its own unpack method that is
+optimized to work with Git trees. Basically, this method works by
+cloning the tree into the final directory. The process is completed
+using references so that there is only one central copy of the Git
+metadata needed.
+
+.. _bb-fetchers:
+
+Fetchers
+========
+
+As mentioned earlier, the URL prefix determines which fetcher submodule
+BitBake uses. Each submodule can support different URL parameters, which
+are described in the following sections.
+
+.. _local-file-fetcher:
+
+Local file fetcher (``file://``)
+--------------------------------
+
+This submodule handles URLs that begin with ``file://``. The filename
+you specify within the URL can be either an absolute or relative path to
+a file. If the filename is relative, the contents of the
+:term:`FILESPATH` variable is used in the same way
+``PATH`` is used to find executables. If the file cannot be found, it is
+assumed that it is available in :term:`DL_DIR` by the
+time the ``download()`` method is called.
+
+If you specify a directory, the entire directory is unpacked.
+
+Here are a couple of example URLs, the first relative and the second
+absolute::
+
+   SRC_URI = "file://relativefile.patch"
+   SRC_URI = "file:///Users/ich/very_important_software"
+
+.. _http-ftp-fetcher:
+
+HTTP/FTP wget fetcher (``http://``, ``ftp://``, ``https://``)
+-------------------------------------------------------------
+
+This fetcher obtains files from web and FTP servers. Internally, the
+fetcher uses the wget utility.
+
+The executable and parameters used are specified by the
+``FETCHCMD_wget`` variable, which defaults to sensible values. The
+fetcher supports a parameter "downloadfilename" that allows the name of
+the downloaded file to be specified. Specifying the name of the
+downloaded file is useful for avoiding collisions in
+:term:`DL_DIR` when dealing with multiple files that
+have the same name.
+
+If a username and password are specified in the ``SRC_URI``, a Basic
+Authorization header will be added to each request, including across redirects.
+To instead limit the Authorization header to the first request, add
+"redirectauth=0" to the list of parameters.
+
+Some example URLs are as follows::
+
+   SRC_URI = "http://oe.handhelds.org/not_there.aac"
+   SRC_URI = "ftp://oe.handhelds.org/not_there_as_well.aac"
+   SRC_URI = "ftp://you@oe.handhelds.org/home/you/secret.plan"
+
+.. note::
+
+   Because URL parameters are delimited by semi-colons, this can
+   introduce ambiguity when parsing URLs that also contain semi-colons,
+   for example::
+
+           SRC_URI = "http://abc123.org/git/?p=gcc/gcc.git;a=snapshot;h=a5dd47"
+
+
+   Such URLs should should be modified by replacing semi-colons with '&'
+   characters::
+
+           SRC_URI = "http://abc123.org/git/?p=gcc/gcc.git&a=snapshot&h=a5dd47"
+
+
+   In most cases this should work. Treating semi-colons and '&' in
+   queries identically is recommended by the World Wide Web Consortium
+   (W3C). Note that due to the nature of the URL, you may have to
+   specify the name of the downloaded file as well::
+
+           SRC_URI = "http://abc123.org/git/?p=gcc/gcc.git&a=snapshot&h=a5dd47;downloadfilename=myfile.bz2"
+
+
+.. _cvs-fetcher:
+
+CVS fetcher (``(cvs://``)
+-------------------------
+
+This submodule handles checking out files from the CVS version control
+system. You can configure it using a number of different variables:
+
+-  :term:`FETCHCMD_cvs <FETCHCMD>`: The name of the executable to use when running
+   the ``cvs`` command. This name is usually "cvs".
+
+-  :term:`SRCDATE`: The date to use when fetching the CVS source code. A
+   special value of "now" causes the checkout to be updated on every
+   build.
+
+-  :term:`CVSDIR`: Specifies where a temporary
+   checkout is saved. The location is often ``DL_DIR/cvs``.
+
+-  CVS_PROXY_HOST: The name to use as a "proxy=" parameter to the
+   ``cvs`` command.
+
+-  CVS_PROXY_PORT: The port number to use as a "proxyport="
+   parameter to the ``cvs`` command.
+
+As well as the standard username and password URL syntax, you can also
+configure the fetcher with various URL parameters:
+
+The supported parameters are as follows:
+
+-  *"method":* The protocol over which to communicate with the CVS
+   server. By default, this protocol is "pserver". If "method" is set to
+   "ext", BitBake examines the "rsh" parameter and sets ``CVS_RSH``. You
+   can use "dir" for local directories.
+
+-  *"module":* Specifies the module to check out. You must supply this
+   parameter.
+
+-  *"tag":* Describes which CVS TAG should be used for the checkout. By
+   default, the TAG is empty.
+
+-  *"date":* Specifies a date. If no "date" is specified, the
+   :term:`SRCDATE` of the configuration is used to
+   checkout a specific date. The special value of "now" causes the
+   checkout to be updated on every build.
+
+-  *"localdir":* Used to rename the module. Effectively, you are
+   renaming the output directory to which the module is unpacked. You
+   are forcing the module into a special directory relative to
+   :term:`CVSDIR`.
+
+-  *"rsh":* Used in conjunction with the "method" parameter.
+
+-  *"scmdata":* Causes the CVS metadata to be maintained in the tarball
+   the fetcher creates when set to "keep". The tarball is expanded into
+   the work directory. By default, the CVS metadata is removed.
+
+-  *"fullpath":* Controls whether the resulting checkout is at the
+   module level, which is the default, or is at deeper paths.
+
+-  *"norecurse":* Causes the fetcher to only checkout the specified
+   directory with no recurse into any subdirectories.
+
+-  *"port":* The port to which the CVS server connects.
+
+Some example URLs are as follows::
+
+   SRC_URI = "cvs://CVSROOT;module=mymodule;tag=some-version;method=ext"
+   SRC_URI = "cvs://CVSROOT;module=mymodule;date=20060126;localdir=usethat"
+
+.. _svn-fetcher:
+
+Subversion (SVN) Fetcher (``svn://``)
+-------------------------------------
+
+This fetcher submodule fetches code from the Subversion source control
+system. The executable used is specified by ``FETCHCMD_svn``, which
+defaults to "svn". The fetcher's temporary working directory is set by
+:term:`SVNDIR`, which is usually ``DL_DIR/svn``.
+
+The supported parameters are as follows:
+
+-  *"module":* The name of the svn module to checkout. You must provide
+   this parameter. You can think of this parameter as the top-level
+   directory of the repository data you want.
+
+-  *"path_spec":* A specific directory in which to checkout the
+   specified svn module.
+
+-  *"protocol":* The protocol to use, which defaults to "svn". If
+   "protocol" is set to "svn+ssh", the "ssh" parameter is also used.
+
+-  *"rev":* The revision of the source code to checkout.
+
+-  *"scmdata":* Causes the ".svn" directories to be available during
+   compile-time when set to "keep". By default, these directories are
+   removed.
+
+-  *"ssh":* An optional parameter used when "protocol" is set to
+   "svn+ssh". You can use this parameter to specify the ssh program used
+   by svn.
+
+-  *"transportuser":* When required, sets the username for the
+   transport. By default, this parameter is empty. The transport
+   username is different than the username used in the main URL, which
+   is passed to the subversion command.
+
+Following are three examples using svn::
+
+   SRC_URI = "svn://myrepos/proj1;module=vip;protocol=http;rev=667"
+   SRC_URI = "svn://myrepos/proj1;module=opie;protocol=svn+ssh"
+   SRC_URI = "svn://myrepos/proj1;module=trunk;protocol=http;path_spec=${MY_DIR}/proj1"
+
+.. _git-fetcher:
+
+Git Fetcher (``git://``)
+------------------------
+
+This fetcher submodule fetches code from the Git source control system.
+The fetcher works by creating a bare clone of the remote into
+:term:`GITDIR`, which is usually ``DL_DIR/git2``. This
+bare clone is then cloned into the work directory during the unpack
+stage when a specific tree is checked out. This is done using alternates
+and by reference to minimize the amount of duplicate data on the disk
+and make the unpack process fast. The executable used can be set with
+``FETCHCMD_git``.
+
+This fetcher supports the following parameters:
+
+-  *"protocol":* The protocol used to fetch the files. The default is
+   "git" when a hostname is set. If a hostname is not set, the Git
+   protocol is "file". You can also use "http", "https", "ssh" and
+   "rsync".
+
+   .. note::
+
+     When ``protocol`` is "ssh", the URL expected in :term:`SRC_URI` differs
+     from the one that is typically passed to ``git clone`` command and provided
+     by the Git server to fetch from. For example, the URL returned by GitLab
+     server for ``mesa`` when cloning over SSH is
+     ``git@gitlab.freedesktop.org:mesa/mesa.git``, however the expected URL in
+     :term:`SRC_URI` is the following::
+
+       SRC_URI = "git://git@gitlab.freedesktop.org/mesa/mesa.git;branch=main;protocol=ssh;..."
+
+     Note the ``:`` character changed for a ``/`` before the path to the project.
+
+-  *"nocheckout":* Tells the fetcher to not checkout source code when
+   unpacking when set to "1". Set this option for the URL where there is
+   a custom routine to checkout code. The default is "0".
+
+-  *"rebaseable":* Indicates that the upstream Git repository can be
+   rebased. You should set this parameter to "1" if revisions can become
+   detached from branches. In this case, the source mirror tarball is
+   done per revision, which has a loss of efficiency. Rebasing the
+   upstream Git repository could cause the current revision to disappear
+   from the upstream repository. This option reminds the fetcher to
+   preserve the local cache carefully for future use. The default value
+   for this parameter is "0".
+
+-  *"nobranch":* Tells the fetcher to not check the SHA validation for
+   the branch when set to "1". The default is "0". Set this option for
+   the recipe that refers to the commit that is valid for any namespace
+   (branch, tag, ...) instead of the branch.
+
+-  *"bareclone":* Tells the fetcher to clone a bare clone into the
+   destination directory without checking out a working tree. Only the
+   raw Git metadata is provided. This parameter implies the "nocheckout"
+   parameter as well.
+
+-  *"branch":* The branch(es) of the Git tree to clone. Unless
+   "nobranch" is set to "1", this is a mandatory parameter. The number of
+   branch parameters must match the number of name parameters.
+
+-  *"rev":* The revision to use for the checkout. The default is
+   "master".
+
+-  *"tag":* Specifies a tag to use for the checkout. To correctly
+   resolve tags, BitBake must access the network. For that reason, tags
+   are often not used. As far as Git is concerned, the "tag" parameter
+   behaves effectively the same as the "rev" parameter.
+
+-  *"subpath":* Limits the checkout to a specific subpath of the tree.
+   By default, the whole tree is checked out.
+
+-  *"destsuffix":* The name of the path in which to place the checkout.
+   By default, the path is ``git/``.
+
+-  *"usehead":* Enables local ``git://`` URLs to use the current branch
+   HEAD as the revision for use with ``AUTOREV``. The "usehead"
+   parameter implies no branch and only works when the transfer protocol
+   is ``file://``.
+
+Here are some example URLs::
+
+   SRC_URI = "git://github.com/fronteed/icheck.git;protocol=https;branch=${PV};tag=${PV}"
+   SRC_URI = "git://github.com/asciidoc/asciidoc-py;protocol=https;branch=main"
+   SRC_URI = "git://git@gitlab.freedesktop.org/mesa/mesa.git;branch=main;protocol=ssh;..."
+
+.. note::
+
+   When using ``git`` as the fetcher of the main source code of your software,
+   ``S`` should be set accordingly::
+
+       S = "${WORKDIR}/git"
+
+.. note::
+
+   Specifying passwords directly in ``git://`` urls is not supported.
+   There are several reasons: :term:`SRC_URI` is often written out to logs and
+   other places, and that could easily leak passwords; it is also all too
+   easy to share metadata without removing passwords. SSH keys, ``~/.netrc``
+   and ``~/.ssh/config`` files can be used as alternatives.
+
+
+.. _gitsm-fetcher:
+
+Git Submodule Fetcher (``gitsm://``)
+------------------------------------
+
+This fetcher submodule inherits from the :ref:`Git
+fetcher<bitbake-user-manual/bitbake-user-manual-fetching:git fetcher
+(\`\`git://\`\`)>` and extends that fetcher's behavior by fetching a
+repository's submodules. :term:`SRC_URI` is passed to the Git fetcher as
+described in the :ref:`bitbake-user-manual/bitbake-user-manual-fetching:git
+fetcher (\`\`git://\`\`)` section.
+
+.. note::
+
+   You must clean a recipe when switching between '``git://``' and
+   '``gitsm://``' URLs.
+
+   The Git Submodules fetcher is not a complete fetcher implementation.
+   The fetcher has known issues where it does not use the normal source
+   mirroring infrastructure properly. Further, the submodule sources it
+   fetches are not visible to the licensing and source archiving
+   infrastructures.
+
+.. _clearcase-fetcher:
+
+ClearCase Fetcher (``ccrc://``)
+-------------------------------
+
+This fetcher submodule fetches code from a
+`ClearCase <http://en.wikipedia.org/wiki/Rational_ClearCase>`__
+repository.
+
+To use this fetcher, make sure your recipe has proper
+:term:`SRC_URI`, :term:`SRCREV`, and
+:term:`PV` settings. Here is an example::
+
+   SRC_URI = "ccrc://cc.example.org/ccrc;vob=/example_vob;module=/example_module"
+   SRCREV = "EXAMPLE_CLEARCASE_TAG"
+   PV = "${@d.getVar("SRCREV", False).replace("/", "+")}"
+
+The fetcher uses the ``rcleartool`` or
+``cleartool`` remote client, depending on which one is available.
+
+Following are options for the :term:`SRC_URI` statement:
+
+-  *vob*: The name, which must include the prepending "/" character,
+   of the ClearCase VOB. This option is required.
+
+-  *module*: The module, which must include the prepending "/"
+   character, in the selected VOB.
+
+   .. note::
+
+      The module and vob options are combined to create the load rule in the
+      view config spec. As an example, consider the vob and module values from
+      the SRC_URI statement at the start of this section. Combining those values
+      results in the following::
+
+         load /example_vob/example_module
+
+-  *proto*: The protocol, which can be either ``http`` or ``https``.
+
+By default, the fetcher creates a configuration specification. If you
+want this specification written to an area other than the default, use
+the ``CCASE_CUSTOM_CONFIG_SPEC`` variable in your recipe to define where
+the specification is written.
+
+.. note::
+
+   the SRCREV loses its functionality if you specify this variable. However,
+   SRCREV is still used to label the archive after a fetch even though it does
+   not define what is fetched.
+
+Here are a couple of other behaviors worth mentioning:
+
+-  When using ``cleartool``, the login of ``cleartool`` is handled by
+   the system. The login require no special steps.
+
+-  In order to use ``rcleartool`` with authenticated users, an
+   "rcleartool login" is necessary before using the fetcher.
+
+.. _perforce-fetcher:
+
+Perforce Fetcher (``p4://``)
+----------------------------
+
+This fetcher submodule fetches code from the
+`Perforce <https://www.perforce.com/>`__ source control system. The
+executable used is specified by ``FETCHCMD_p4``, which defaults to "p4".
+The fetcher's temporary working directory is set by
+:term:`P4DIR`, which defaults to "DL_DIR/p4".
+The fetcher does not make use of a perforce client, instead it
+relies on ``p4 files`` to retrieve a list of
+files and ``p4 print`` to transfer the content
+of those files locally.
+
+To use this fetcher, make sure your recipe has proper
+:term:`SRC_URI`, :term:`SRCREV`, and
+:term:`PV` values. The p4 executable is able to use the
+config file defined by your system's ``P4CONFIG`` environment variable
+in order to define the Perforce server URL and port, username, and
+password if you do not wish to keep those values in a recipe itself. If
+you choose not to use ``P4CONFIG``, or to explicitly set variables that
+``P4CONFIG`` can contain, you can specify the ``P4PORT`` value, which is
+the server's URL and port number, and you can specify a username and
+password directly in your recipe within :term:`SRC_URI`.
+
+Here is an example that relies on ``P4CONFIG`` to specify the server URL
+and port, username, and password, and fetches the Head Revision::
+
+   SRC_URI = "p4://example-depot/main/source/..."
+   SRCREV = "${AUTOREV}"
+   PV = "p4-${SRCPV}"
+   S = "${WORKDIR}/p4"
+
+Here is an example that specifies the server URL and port, username, and
+password, and fetches a Revision based on a Label::
+
+   P4PORT = "tcp:p4server.example.net:1666"
+   SRC_URI = "p4://user:passwd@example-depot/main/source/..."
+   SRCREV = "release-1.0"
+   PV = "p4-${SRCPV}"
+   S = "${WORKDIR}/p4"
+
+.. note::
+
+   You should always set S to "${WORKDIR}/p4" in your recipe.
+
+By default, the fetcher strips the depot location from the local file paths. In
+the above example, the content of ``example-depot/main/source/`` will be placed
+in ``${WORKDIR}/p4``.  For situations where preserving parts of the remote depot
+paths locally is desirable, the fetcher supports two parameters:
+
+- *"module":*
+    The top-level depot location or directory to fetch. The value of this
+    parameter can also point to a single file within the depot, in which case
+    the local file path will include the module path.
+- *"remotepath":*
+    When used with the value "``keep``", the fetcher will mirror the full depot
+    paths locally for the specified location, even in combination with the
+    ``module`` parameter.
+
+Here is an example use of the the ``module`` parameter::
+
+   SRC_URI = "p4://user:passwd@example-depot/main;module=source/..."
+
+In this case, the content of the top-level directory ``source/`` will be fetched
+to ``${P4DIR}``, including the directory itself.  The top-level directory will
+be accesible at ``${P4DIR}/source/``.
+
+Here is an example use of the the ``remotepath`` parameter::
+
+   SRC_URI = "p4://user:passwd@example-depot/main;module=source/...;remotepath=keep"
+
+In this case, the content of the top-level directory ``source/`` will be fetched
+to ``${P4DIR}``, but the complete depot paths will be mirrored locally. The
+top-level directory will be accessible at
+``${P4DIR}/example-depot/main/source/``.
+
+.. _repo-fetcher:
+
+Repo Fetcher (``repo://``)
+--------------------------
+
+This fetcher submodule fetches code from ``google-repo`` source control
+system. The fetcher works by initiating and syncing sources of the
+repository into :term:`REPODIR`, which is usually
+``${DL_DIR}/repo``.
+
+This fetcher supports the following parameters:
+
+-  *"protocol":* Protocol to fetch the repository manifest (default:
+   git).
+
+-  *"branch":* Branch or tag of repository to get (default: master).
+
+-  *"manifest":* Name of the manifest file (default: ``default.xml``).
+
+Here are some example URLs::
+
+   SRC_URI = "repo://REPOROOT;protocol=git;branch=some_branch;manifest=my_manifest.xml"
+   SRC_URI = "repo://REPOROOT;protocol=file;branch=some_branch;manifest=my_manifest.xml"
+
+.. _az-fetcher:
+
+Az Fetcher (``az://``)
+--------------------------
+
+This submodule fetches data from an
+`Azure Storage account <https://docs.microsoft.com/en-us/azure/storage/>`__ ,
+it inherits its functionality from the HTTP wget fetcher, but modifies its
+behavior to accomodate the usage of a
+`Shared Access Signature (SAS) <https://docs.microsoft.com/en-us/azure/storage/common/storage-sas-overview>`__
+for non-public data.
+
+Such functionality is set by the variable:
+
+-  :term:`AZ_SAS`: The Azure Storage Shared Access Signature provides secure
+   delegate access to resources, if this variable is set, the Az Fetcher will
+   use it when fetching artifacts from the cloud.
+
+You can specify the AZ_SAS variable as shown below::
+
+   AZ_SAS = "se=2021-01-01&sp=r&sv=2018-11-09&sr=c&skoid=<skoid>&sig=<signature>"
+
+Here is an example URL::
+
+   SRC_URI = "az://<azure-storage-account>.blob.core.windows.net/<foo_container>/<bar_file>"
+
+It can also be used when setting mirrors definitions using the :term:`PREMIRRORS` variable.
+
+.. _crate-fetcher:
+
+Crate Fetcher (``crate://``)
+----------------------------
+
+This submodule fetches code for
+`Rust language "crates" <https://doc.rust-lang.org/reference/glossary.html?highlight=crate#crate>`__
+corresponding to Rust libraries and programs to compile. Such crates are typically shared
+on https://crates.io/ but this fetcher supports other crate registries too.
+
+The format for the :term:`SRC_URI` setting must be::
+
+   SRC_URI = "crate://REGISTRY/NAME/VERSION"
+
+Here is an example URL::
+
+   SRC_URI = "crate://crates.io/glob/0.2.11"
+
+.. _npm-fetcher:
+
+NPM Fetcher (``npm://``)
+------------------------
+
+This submodule fetches source code from an
+`NPM <https://en.wikipedia.org/wiki/Npm_(software)>`__
+Javascript package registry.
+
+The format for the :term:`SRC_URI` setting must be::
+
+   SRC_URI = "npm://some.registry.url;ParameterA=xxx;ParameterB=xxx;..."
+
+This fetcher supports the following parameters:
+
+-  *"package":* The NPM package name. This is a mandatory parameter.
+
+-  *"version":* The NPM package version. This is a mandatory parameter.
+
+-  *"downloadfilename":* Specifies the filename used when storing the downloaded file.
+
+-  *"destsuffix":* Specifies the directory to use to unpack the package (default: ``npm``).
+
+Note that NPM fetcher only fetches the package source itself. The dependencies
+can be fetched through the `npmsw-fetcher`_.
+
+Here is an example URL with both fetchers::
+
+   SRC_URI = " \
+       npm://registry.npmjs.org/;package=cute-files;version=${PV} \
+       npmsw://${THISDIR}/${BPN}/npm-shrinkwrap.json \
+       "
+
+See :yocto_docs:`Creating Node Package Manager (NPM) Packages
+</dev-manual/packages.html#creating-node-package-manager-npm-packages>`
+in the Yocto Project manual for details about using
+:yocto_docs:`devtool <https://docs.yoctoproject.org/ref-manual/devtool-reference.html>`
+to automatically create a recipe from an NPM URL.
+
+.. _npmsw-fetcher:
+
+NPM shrinkwrap Fetcher (``npmsw://``)
+-------------------------------------
+
+This submodule fetches source code from an
+`NPM shrinkwrap <https://docs.npmjs.com/cli/v8/commands/npm-shrinkwrap>`__
+description file, which lists the dependencies
+of an NPM package while locking their versions.
+
+The format for the :term:`SRC_URI` setting must be::
+
+   SRC_URI = "npmsw://some.registry.url;ParameterA=xxx;ParameterB=xxx;..."
+
+This fetcher supports the following parameters:
+
+-  *"dev":* Set this parameter to ``1`` to install "devDependencies".
+
+-  *"destsuffix":* Specifies the directory to use to unpack the dependencies
+   (``${S}`` by default).
+
+Note that the shrinkwrap file can also be provided by the recipe for
+the package which has such dependencies, for example::
+
+   SRC_URI = " \
+       npm://registry.npmjs.org/;package=cute-files;version=${PV} \
+       npmsw://${THISDIR}/${BPN}/npm-shrinkwrap.json \
+       "
+
+Such a file can automatically be generated using
+:yocto_docs:`devtool <https://docs.yoctoproject.org/ref-manual/devtool-reference.html>`
+as described in the :yocto_docs:`Creating Node Package Manager (NPM) Packages
+</dev-manual/packages.html#creating-node-package-manager-npm-packages>`
+section of the Yocto Project.
+
+Other Fetchers
+--------------
+
+Fetch submodules also exist for the following:
+
+-  Bazaar (``bzr://``)
+
+-  Mercurial (``hg://``)
+
+-  OSC (``osc://``)
+
+-  Secure FTP (``sftp://``)
+
+-  Secure Shell (``ssh://``)
+
+-  Trees using Git Annex (``gitannex://``)
+
+No documentation currently exists for these lesser used fetcher
+submodules. However, you might find the code helpful and readable.
+
+Auto Revisions
+==============
+
+We need to document ``AUTOREV`` and :term:`SRCREV_FORMAT` here.

bitbake/doc/bitbake-user-manual/bitbake-user-manual-hello.rst

@@ -0,0 +1,408 @@
+.. SPDX-License-Identifier: CC-BY-2.5
+
+===================
+Hello World Example
+===================
+
+BitBake Hello World
+===================
+
+The simplest example commonly used to demonstrate any new programming
+language or tool is the "`Hello
+World <http://en.wikipedia.org/wiki/Hello_world_program>`__" example.
+This appendix demonstrates, in tutorial form, Hello World within the
+context of BitBake. The tutorial describes how to create a new project
+and the applicable metadata files necessary to allow BitBake to build
+it.
+
+Obtaining BitBake
+=================
+
+See the :ref:`bitbake-user-manual/bitbake-user-manual-intro:obtaining bitbake` section for
+information on how to obtain BitBake. Once you have the source code on
+your machine, the BitBake directory appears as follows::
+
+   $ ls -al
+   total 108
+   drwxr-xr-x  9 fawkh 10000  4096 feb 24 12:10 .
+   drwx------ 36 fawkh 10000  4096 mar  2 17:00 ..
+   -rw-r--r--  1 fawkh 10000   365 feb 24 12:10 AUTHORS
+   drwxr-xr-x  2 fawkh 10000  4096 feb 24 12:10 bin
+   -rw-r--r--  1 fawkh 10000 16501 feb 24 12:10 ChangeLog
+   drwxr-xr-x  2 fawkh 10000  4096 feb 24 12:10 classes
+   drwxr-xr-x  2 fawkh 10000  4096 feb 24 12:10 conf
+   drwxr-xr-x  5 fawkh 10000  4096 feb 24 12:10 contrib
+   drwxr-xr-x  6 fawkh 10000  4096 feb 24 12:10 doc
+   drwxr-xr-x  8 fawkh 10000  4096 mar  2 16:26 .git
+   -rw-r--r--  1 fawkh 10000    31 feb 24 12:10 .gitattributes
+   -rw-r--r--  1 fawkh 10000   392 feb 24 12:10 .gitignore
+   drwxr-xr-x 13 fawkh 10000  4096 feb 24 12:11 lib
+   -rw-r--r--  1 fawkh 10000  1224 feb 24 12:10 LICENSE
+   -rw-r--r--  1 fawkh 10000 15394 feb 24 12:10 LICENSE.GPL-2.0-only
+   -rw-r--r--  1 fawkh 10000  1286 feb 24 12:10 LICENSE.MIT
+   -rw-r--r--  1 fawkh 10000   229 feb 24 12:10 MANIFEST.in
+   -rw-r--r--  1 fawkh 10000  2413 feb 24 12:10 README
+   -rw-r--r--  1 fawkh 10000    43 feb 24 12:10 toaster-requirements.txt
+   -rw-r--r--  1 fawkh 10000  2887 feb 24 12:10 TODO
+
+At this point, you should have BitBake cloned to a directory that
+matches the previous listing except for dates and user names.
+
+Setting Up the BitBake Environment
+==================================
+
+First, you need to be sure that you can run BitBake. Set your working
+directory to where your local BitBake files are and run the following
+command::
+
+  $ ./bin/bitbake --version
+  BitBake Build Tool Core version 2.3.1
+
+The console output tells you what version
+you are running.
+
+The recommended method to run BitBake is from a directory of your
+choice. To be able to run BitBake from any directory, you need to add
+the executable binary to your binary to your shell's environment
+``PATH`` variable. First, look at your current ``PATH`` variable by
+entering the following::
+
+  $ echo $PATH
+
+Next, add the directory location
+for the BitBake binary to the ``PATH``. Here is an example that adds the
+``/home/scott-lenovo/bitbake/bin`` directory to the front of the
+``PATH`` variable::
+
+  $ export PATH=/home/scott-lenovo/bitbake/bin:$PATH
+
+You should now be able to enter the ``bitbake`` command from the command
+line while working from any directory.
+
+The Hello World Example
+=======================
+
+The overall goal of this exercise is to build a complete "Hello World"
+example utilizing task and layer concepts. Because this is how modern
+projects such as OpenEmbedded and the Yocto Project utilize BitBake, the
+example provides an excellent starting point for understanding BitBake.
+
+To help you understand how to use BitBake to build targets, the example
+starts with nothing but the ``bitbake`` command, which causes BitBake to
+fail and report problems. The example progresses by adding pieces to the
+build to eventually conclude with a working, minimal "Hello World"
+example.
+
+While every attempt is made to explain what is happening during the
+example, the descriptions cannot cover everything. You can find further
+information throughout this manual. Also, you can actively participate
+in the :oe_lists:`/g/bitbake-devel`
+discussion mailing list about the BitBake build tool.
+
+.. note::
+
+   This example was inspired by and drew heavily from
+   `Mailing List post - The BitBake equivalent of "Hello, World!"
+   <https://www.mail-archive.com/yocto@yoctoproject.org/msg09379.html>`_.
+
+As stated earlier, the goal of this example is to eventually compile
+"Hello World". However, it is unknown what BitBake needs and what you
+have to provide in order to achieve that goal. Recall that BitBake
+utilizes three types of metadata files:
+:ref:`bitbake-user-manual/bitbake-user-manual-intro:configuration files`,
+:ref:`bitbake-user-manual/bitbake-user-manual-intro:classes`, and
+:ref:`bitbake-user-manual/bitbake-user-manual-intro:recipes`.
+But where do they go? How does BitBake find
+them? BitBake's error messaging helps you answer these types of
+questions and helps you better understand exactly what is going on.
+
+Following is the complete "Hello World" example.
+
+#.  **Create a Project Directory:** First, set up a directory for the
+    "Hello World" project. Here is how you can do so in your home
+    directory::
+
+      $ mkdir ~/hello
+      $ cd ~/hello
+
+    This is the directory that
+    BitBake will use to do all of its work. You can use this directory
+    to keep all the metafiles needed by BitBake. Having a project
+    directory is a good way to isolate your project.
+
+#.  **Run BitBake:** At this point, you have nothing but a project
+    directory. Run the ``bitbake`` command and see what it does::
+
+       $ bitbake
+       ERROR: The BBPATH variable is not set and bitbake did not find a conf/bblayers.conf file in the expected location.
+       Maybe you accidentally invoked bitbake from the wrong directory?
+
+    When you run BitBake, it begins looking for metadata files. The
+    :term:`BBPATH` variable is what tells BitBake where
+    to look for those files. :term:`BBPATH` is not set and you need to set
+    it. Without :term:`BBPATH`, BitBake cannot find any configuration files
+    (``.conf``) or recipe files (``.bb``) at all. BitBake also cannot
+    find the ``bitbake.conf`` file.
+
+#.  **Setting BBPATH:** For this example, you can set :term:`BBPATH` in
+    the same manner that you set ``PATH`` earlier in the appendix. You
+    should realize, though, that it is much more flexible to set the
+    :term:`BBPATH` variable up in a configuration file for each project.
+
+    From your shell, enter the following commands to set and export the
+    :term:`BBPATH` variable::
+
+      $ BBPATH="projectdirectory"
+      $ export BBPATH
+
+    Use your actual project directory in the command. BitBake uses that
+    directory to find the metadata it needs for your project.
+
+    .. note::
+
+       When specifying your project directory, do not use the tilde
+       ("~") character as BitBake does not expand that character as the
+       shell would.
+
+#.  **Run BitBake:** Now that you have :term:`BBPATH` defined, run the
+    ``bitbake`` command again::
+
+       $ bitbake
+       ERROR: Unable to parse /home/scott-lenovo/bitbake/lib/bb/parse/__init__.py
+       Traceback (most recent call last):
+       File "/home/scott-lenovo/bitbake/lib/bb/parse/__init__.py", line 127, in resolve_file(fn='conf/bitbake.conf', d=<bb.data_smart.DataSmart object at 0x7f22919a3df0>):
+             if not newfn:
+       >            raise IOError(errno.ENOENT, "file %s not found in %s" % (fn, bbpath))
+             fn = newfn
+       FileNotFoundError: [Errno 2] file conf/bitbake.conf not found in <projectdirectory>
+
+
+    This sample output shows that BitBake could not find the
+    ``conf/bitbake.conf`` file in the project directory. This file is
+    the first thing BitBake must find in order to build a target. And,
+    since the project directory for this example is empty, you need to
+    provide a ``conf/bitbake.conf`` file.
+
+#.  **Creating conf/bitbake.conf:** The ``conf/bitbake.conf`` includes
+    a number of configuration variables BitBake uses for metadata and
+    recipe files. For this example, you need to create the file in your
+    project directory and define some key BitBake variables. For more
+    information on the ``bitbake.conf`` file, see
+    https://git.openembedded.org/bitbake/tree/conf/bitbake.conf.
+
+    Use the following commands to create the ``conf`` directory in the
+    project directory::
+
+      $ mkdir conf
+
+    From within the ``conf`` directory,
+    use some editor to create the ``bitbake.conf`` so that it contains
+    the following::
+
+       PN  = "${@bb.parse.vars_from_file(d.getVar('FILE', False),d)[0] or 'defaultpkgname'}"
+
+       TMPDIR  = "${TOPDIR}/tmp"
+       CACHE   = "${TMPDIR}/cache"
+       STAMP   = "${TMPDIR}/${PN}/stamps"
+       T       = "${TMPDIR}/${PN}/work"
+       B       = "${TMPDIR}/${PN}"
+
+    .. note::
+
+       Without a value for PN , the variables STAMP , T , and B , prevent more
+       than one recipe from working. You can fix this by either setting PN to
+       have a value similar to what OpenEmbedded and BitBake use in the default
+       bitbake.conf file (see previous example). Or, by manually updating each
+       recipe to set PN . You will also need to include PN as part of the STAMP
+       , T , and B variable definitions in the local.conf file.
+
+    The ``TMPDIR`` variable establishes a directory that BitBake uses
+    for build output and intermediate files other than the cached
+    information used by the
+    :ref:`bitbake-user-manual/bitbake-user-manual-execution:setscene`
+    process. Here, the ``TMPDIR`` directory is set to ``hello/tmp``.
+
+    .. tip::
+
+       You can always safely delete the tmp directory in order to rebuild a
+       BitBake target. The build process creates the directory for you when you
+       run BitBake.
+
+    For information about each of the other variables defined in this
+    example, check :term:`PN`, :term:`TOPDIR`, :term:`CACHE`, :term:`STAMP`,
+    :term:`T` or :term:`B` to take you to the definitions in the
+    glossary.
+
+#.  **Run BitBake:** After making sure that the ``conf/bitbake.conf`` file
+    exists, you can run the ``bitbake`` command again::
+
+       $ bitbake
+       ERROR: Unable to parse /home/scott-lenovo/bitbake/lib/bb/parse/parse_py/BBHandler.py
+       Traceback (most recent call last):
+       File "/home/scott-lenovo/bitbake/lib/bb/parse/parse_py/BBHandler.py", line 67, in inherit(files=['base'], fn='configuration INHERITs', lineno=0, d=<bb.data_smart.DataSmart object at 0x7fab6815edf0>):
+             if not os.path.exists(file):
+       >            raise ParseError("Could not inherit file %s" % (file), fn, lineno)
+
+       bb.parse.ParseError: ParseError in configuration INHERITs: Could not inherit file classes/base.bbclass
+
+
+    In the sample output,
+    BitBake could not find the ``classes/base.bbclass`` file. You need
+    to create that file next.
+
+#.  **Creating classes/base.bbclass:** BitBake uses class files to
+    provide common code and functionality. The minimally required class
+    for BitBake is the ``classes/base.bbclass`` file. The ``base`` class
+    is implicitly inherited by every recipe. BitBake looks for the class
+    in the ``classes`` directory of the project (i.e ``hello/classes``
+    in this example).
+
+    Create the ``classes`` directory as follows::
+
+      $ cd $HOME/hello
+      $ mkdir classes
+
+    Move to the ``classes`` directory and then create the
+    ``base.bbclass`` file by inserting this single line::
+
+      addtask build
+
+    The minimal task that BitBake runs is the ``do_build`` task. This is
+    all the example needs in order to build the project. Of course, the
+    ``base.bbclass`` can have much more depending on which build
+    environments BitBake is supporting.
+
+#.  **Run BitBake:** After making sure that the ``classes/base.bbclass``
+    file exists, you can run the ``bitbake`` command again::
+
+       $ bitbake
+       Nothing to do. Use 'bitbake world' to build everything, or run 'bitbake --help' for usage information.
+
+    BitBake is finally reporting
+    no errors. However, you can see that it really does not have
+    anything to do. You need to create a recipe that gives BitBake
+    something to do.
+
+#.  **Creating a Layer:** While it is not really necessary for such a
+    small example, it is good practice to create a layer in which to
+    keep your code separate from the general metadata used by BitBake.
+    Thus, this example creates and uses a layer called "mylayer".
+
+    .. note::
+
+       You can find additional information on layers in the
+       ":ref:`bitbake-user-manual/bitbake-user-manual-intro:Layers`" section.
+
+    Minimally, you need a recipe file and a layer configuration file in
+    your layer. The configuration file needs to be in the ``conf``
+    directory inside the layer. Use these commands to set up the layer
+    and the ``conf`` directory::
+
+       $ cd $HOME
+       $ mkdir mylayer
+       $ cd mylayer
+       $ mkdir conf
+
+    Move to the ``conf`` directory and create a ``layer.conf`` file that has the
+    following::
+
+      BBPATH .= ":${LAYERDIR}"
+      BBFILES += "${LAYERDIR}/*.bb"
+      BBFILE_COLLECTIONS += "mylayer"
+      BBFILE_PATTERN_mylayer := "^${LAYERDIR_RE}/"
+      LAYERSERIES_CORENAMES = "hello_world_example"
+      LAYERSERIES_COMPAT_mylayer = "hello_world_example"
+
+    For information on these variables, click on :term:`BBFILES`,
+    :term:`LAYERDIR`, :term:`BBFILE_COLLECTIONS`, :term:`BBFILE_PATTERN_mylayer <BBFILE_PATTERN>`
+    or :term:`LAYERSERIES_COMPAT` to go to the definitions in the glossary.
+
+    .. note::
+
+       We are setting both LAYERSERIES_CORENAMES and LAYERSERIES_COMPAT in this particular case, because we
+       are using bitbake without OpenEmbedded.
+       You should usually just use LAYERSERIES_COMPAT to specify the OE-Core versions for which your layer
+       is compatible, and add the meta-openembedded layer to your project.
+
+    You need to create the recipe file next. Inside your layer at the
+    top-level, use an editor and create a recipe file named
+    ``printhello.bb`` that has the following::
+
+       DESCRIPTION = "Prints Hello World"
+       PN = 'printhello'
+       PV = '1'
+
+       python do_build() {
+          bb.plain("********************");
+          bb.plain("*                  *");
+          bb.plain("*  Hello, World!   *");
+          bb.plain("*                  *");
+          bb.plain("********************");
+       }
+
+    The recipe file simply provides
+    a description of the recipe, the name, version, and the ``do_build``
+    task, which prints out "Hello World" to the console. For more
+    information on :term:`DESCRIPTION`, :term:`PN` or :term:`PV`
+    follow the links to the glossary.
+
+#. **Run BitBake With a Target:** Now that a BitBake target exists, run
+    the command and provide that target::
+
+      $ cd $HOME/hello
+      $ bitbake printhello
+      ERROR: no recipe files to build, check your BBPATH and BBFILES?
+
+      Summary: There was 1 ERROR message shown, returning a non-zero exit code.
+
+    We have created the layer with the recipe and
+    the layer configuration file but it still seems that BitBake cannot
+    find the recipe. BitBake needs a ``conf/bblayers.conf`` that lists
+    the layers for the project. Without this file, BitBake cannot find
+    the recipe.
+
+#. **Creating conf/bblayers.conf:** BitBake uses the
+    ``conf/bblayers.conf`` file to locate layers needed for the project.
+    This file must reside in the ``conf`` directory of the project (i.e.
+    ``hello/conf`` for this example).
+
+    Set your working directory to the ``hello/conf`` directory and then
+    create the ``bblayers.conf`` file so that it contains the following::
+
+       BBLAYERS ?= " \
+           /home/<you>/mylayer \
+       "
+
+    You need to provide your own information for ``you`` in the file.
+
+#. **Run BitBake With a Target:** Now that you have supplied the
+    ``bblayers.conf`` file, run the ``bitbake`` command and provide the
+    target::
+
+       $ bitbake printhello
+       Loading cache: 100% |
+       Loaded 0 entries from dependency cache.
+       Parsing recipes: 100% |##################################################################################|
+       Parsing of 1 .bb files complete (0 cached, 1 parsed). 1 targets, 0 skipped, 0 masked, 0 errors.
+       NOTE: Resolving any missing task queue dependencies
+       Initialising tasks: 100% |###############################################################################|
+       NOTE: No setscene tasks
+       NOTE: Executing Tasks
+       ********************
+       *                  *
+       *  Hello, World!   *
+       *                  *
+       ********************
+       NOTE: Tasks Summary: Attempted 1 tasks of which 0 didn't need to be rerun and all succeeded.
+
+    .. note::
+
+       After the first execution, re-running bitbake printhello again will not
+       result in a BitBake run that prints the same console output. The reason
+       for this is that the first time the printhello.bb recipe's do_build task
+       executes successfully, BitBake writes a stamp file for the task. Thus,
+       the next time you attempt to run the task using that same bitbake
+       command, BitBake notices the stamp and therefore determines that the task
+       does not need to be re-run. If you delete the tmp directory or run
+       bitbake -c clean printhello and then re-run the build, the "Hello,
+       World!" message will be printed again.

bitbake/doc/bitbake-user-manual/bitbake-user-manual-intro.rst

@@ -0,0 +1,653 @@
+.. SPDX-License-Identifier: CC-BY-2.5
+
+========
+Overview
+========
+
+|
+
+Welcome to the BitBake User Manual. This manual provides information on
+the BitBake tool. The information attempts to be as independent as
+possible regarding systems that use BitBake, such as OpenEmbedded and
+the Yocto Project. In some cases, scenarios or examples within the
+context of a build system are used in the manual to help with
+understanding. For these cases, the manual clearly states the context.
+
+.. _intro:
+
+Introduction
+============
+
+Fundamentally, BitBake is a generic task execution engine that allows
+shell and Python tasks to be run efficiently and in parallel while
+working within complex inter-task dependency constraints. One of
+BitBake's main users, OpenEmbedded, takes this core and builds embedded
+Linux software stacks using a task-oriented approach.
+
+Conceptually, BitBake is similar to GNU Make in some regards but has
+significant differences:
+
+-  BitBake executes tasks according to the provided metadata that builds up
+   the tasks. Metadata is stored in recipe (``.bb``) and related recipe
+   "append" (``.bbappend``) files, configuration (``.conf``) and
+   underlying include (``.inc``) files, and in class (``.bbclass``)
+   files. The metadata provides BitBake with instructions on what tasks
+   to run and the dependencies between those tasks.
+
+-  BitBake includes a fetcher library for obtaining source code from
+   various places such as local files, source control systems, or
+   websites.
+
+-  The instructions for each unit to be built (e.g. a piece of software)
+   are known as "recipe" files and contain all the information about the
+   unit (dependencies, source file locations, checksums, description and
+   so on).
+
+-  BitBake includes a client/server abstraction and can be used from a
+   command line or used as a service over XML-RPC and has several
+   different user interfaces.
+
+History and Goals
+=================
+
+BitBake was originally a part of the OpenEmbedded project. It was
+inspired by the Portage package management system used by the Gentoo
+Linux distribution. On December 7, 2004, OpenEmbedded project team
+member Chris Larson split the project into two distinct pieces:
+
+-  BitBake, a generic task executor
+
+-  OpenEmbedded, a metadata set utilized by BitBake
+
+Today, BitBake is the primary basis of the
+`OpenEmbedded <https://www.openembedded.org/>`__ project, which is being
+used to build and maintain Linux distributions such as the `Poky
+Reference Distribution <https://www.yoctoproject.org/software-item/poky/>`__,
+developed under the umbrella of the `Yocto Project <https://www.yoctoproject.org>`__.
+
+Prior to BitBake, no other build tool adequately met the needs of an
+aspiring embedded Linux distribution. All of the build systems used by
+traditional desktop Linux distributions lacked important functionality,
+and none of the ad hoc Buildroot-based systems, prevalent in the
+embedded space, were scalable or maintainable.
+
+Some important original goals for BitBake were:
+
+-  Handle cross-compilation.
+
+-  Handle inter-package dependencies (build time on target architecture,
+   build time on native architecture, and runtime).
+
+-  Support running any number of tasks within a given package,
+   including, but not limited to, fetching upstream sources, unpacking
+   them, patching them, configuring them, and so forth.
+
+-  Be Linux distribution agnostic for both build and target systems.
+
+-  Be architecture agnostic.
+
+-  Support multiple build and target operating systems (e.g. Cygwin, the
+   BSDs, and so forth).
+
+-  Be self-contained, rather than tightly integrated into the build
+   machine's root filesystem.
+
+-  Handle conditional metadata on the target architecture, operating
+   system, distribution, and machine.
+
+-  Be easy to use the tools to supply local metadata and packages
+   against which to operate.
+
+-  Be easy to use BitBake to collaborate between multiple projects for
+   their builds.
+
+-  Provide an inheritance mechanism to share common metadata between
+   many packages.
+
+Over time it became apparent that some further requirements were
+necessary:
+
+-  Handle variants of a base recipe (e.g. native, sdk, and multilib).
+
+-  Split metadata into layers and allow layers to enhance or override
+   other layers.
+
+-  Allow representation of a given set of input variables to a task as a
+   checksum. Based on that checksum, allow acceleration of builds with
+   prebuilt components.
+
+BitBake satisfies all the original requirements and many more with
+extensions being made to the basic functionality to reflect the
+additional requirements. Flexibility and power have always been the
+priorities. BitBake is highly extensible and supports embedded Python
+code and execution of any arbitrary tasks.
+
+.. _Concepts:
+
+Concepts
+========
+
+BitBake is a program written in the Python language. At the highest
+level, BitBake interprets metadata, decides what tasks are required to
+run, and executes those tasks. Similar to GNU Make, BitBake controls how
+software is built. GNU Make achieves its control through "makefiles",
+while BitBake uses "recipes".
+
+BitBake extends the capabilities of a simple tool like GNU Make by
+allowing for the definition of much more complex tasks, such as
+assembling entire embedded Linux distributions.
+
+The remainder of this section introduces several concepts that should be
+understood in order to better leverage the power of BitBake.
+
+Recipes
+-------
+
+BitBake Recipes, which are denoted by the file extension ``.bb``, are
+the most basic metadata files. These recipe files provide BitBake with
+the following:
+
+-  Descriptive information about the package (author, homepage, license,
+   and so on)
+
+-  The version of the recipe
+
+-  Existing dependencies (both build and runtime dependencies)
+
+-  Where the source code resides and how to fetch it
+
+-  Whether the source code requires any patches, where to find them, and
+   how to apply them
+
+-  How to configure and compile the source code
+
+-  How to assemble the generated artifacts into one or more installable
+   packages
+
+-  Where on the target machine to install the package or packages
+   created
+
+Within the context of BitBake, or any project utilizing BitBake as its
+build system, files with the ``.bb`` extension are referred to as
+recipes.
+
+.. note::
+
+   The term "package" is also commonly used to describe recipes.
+   However, since the same word is used to describe packaged output from
+   a project, it is best to maintain a single descriptive term -
+   "recipes". Put another way, a single "recipe" file is quite capable
+   of generating a number of related but separately installable
+   "packages". In fact, that ability is fairly common.
+
+Configuration Files
+-------------------
+
+Configuration files, which are denoted by the ``.conf`` extension,
+define various configuration variables that govern the project's build
+process. These files fall into several areas that define machine
+configuration, distribution configuration, possible compiler tuning,
+general common configuration, and user configuration. The main
+configuration file is the sample ``bitbake.conf`` file, which is located
+within the BitBake source tree ``conf`` directory.
+
+Classes
+-------
+
+Class files, which are denoted by the ``.bbclass`` extension, contain
+information that is useful to share between metadata files. The BitBake
+source tree currently comes with one class metadata file called
+``base.bbclass``. You can find this file in the ``classes`` directory.
+The ``base.bbclass`` class files is special since it is always included
+automatically for all recipes and classes. This class contains
+definitions for standard basic tasks such as fetching, unpacking,
+configuring (empty by default), compiling (runs any Makefile present),
+installing (empty by default) and packaging (empty by default). These
+tasks are often overridden or extended by other classes added during the
+project development process.
+
+Layers
+------
+
+Layers allow you to isolate different types of customizations from each
+other. While you might find it tempting to keep everything in one layer
+when working on a single project, the more modular your metadata, the
+easier it is to cope with future changes.
+
+To illustrate how you can use layers to keep things modular, consider
+customizations you might make to support a specific target machine.
+These types of customizations typically reside in a special layer,
+rather than a general layer, called a Board Support Package (BSP) layer.
+Furthermore, the machine customizations should be isolated from recipes
+and metadata that support a new GUI environment, for example. This
+situation gives you a couple of layers: one for the machine
+configurations and one for the GUI environment. It is important to
+understand, however, that the BSP layer can still make machine-specific
+additions to recipes within the GUI environment layer without polluting
+the GUI layer itself with those machine-specific changes. You can
+accomplish this through a recipe that is a BitBake append
+(``.bbappend``) file.
+
+.. _append-bbappend-files:
+
+Append Files
+------------
+
+Append files, which are files that have the ``.bbappend`` file
+extension, extend or override information in an existing recipe file.
+
+BitBake expects every append file to have a corresponding recipe file.
+Furthermore, the append file and corresponding recipe file must use the
+same root filename. The filenames can differ only in the file type
+suffix used (e.g. ``formfactor_0.0.bb`` and
+``formfactor_0.0.bbappend``).
+
+Information in append files extends or overrides the information in the
+underlying, similarly-named recipe files.
+
+When you name an append file, you can use the "``%``" wildcard character
+to allow for matching recipe names. For example, suppose you have an
+append file named as follows::
+
+  busybox_1.21.%.bbappend
+
+That append file
+would match any ``busybox_1.21.``\ x\ ``.bb`` version of the recipe. So,
+the append file would match the following recipe names::
+
+  busybox_1.21.1.bb
+  busybox_1.21.2.bb
+  busybox_1.21.3.bb
+
+.. note::
+
+   The use of the " % " character is limited in that it only works directly in
+   front of the .bbappend portion of the append file's name. You cannot use the
+   wildcard character in any other location of the name.
+
+If the ``busybox`` recipe was updated to ``busybox_1.3.0.bb``, the
+append name would not match. However, if you named the append file
+``busybox_1.%.bbappend``, then you would have a match.
+
+In the most general case, you could name the append file something as
+simple as ``busybox_%.bbappend`` to be entirely version independent.
+
+Obtaining BitBake
+=================
+
+You can obtain BitBake several different ways:
+
+-  **Cloning BitBake:** Using Git to clone the BitBake source code
+   repository is the recommended method for obtaining BitBake. Cloning
+   the repository makes it easy to get bug fixes and have access to
+   stable branches and the master branch. Once you have cloned BitBake,
+   you should use the latest stable branch for development since the
+   master branch is for BitBake development and might contain less
+   stable changes.
+
+   You usually need a version of BitBake that matches the metadata you
+   are using. The metadata is generally backwards compatible but not
+   forward compatible.
+
+   Here is an example that clones the BitBake repository::
+
+     $ git clone git://git.openembedded.org/bitbake
+
+   This command clones the BitBake
+   Git repository into a directory called ``bitbake``. Alternatively,
+   you can designate a directory after the ``git clone`` command if you
+   want to call the new directory something other than ``bitbake``. Here
+   is an example that names the directory ``bbdev``::
+
+     $ git clone git://git.openembedded.org/bitbake bbdev
+
+-  **Installation using your Distribution Package Management System:**
+   This method is not recommended because the BitBake version that is
+   provided by your distribution, in most cases, is several releases
+   behind a snapshot of the BitBake repository.
+
+-  **Taking a snapshot of BitBake:** Downloading a snapshot of BitBake
+   from the source code repository gives you access to a known branch or
+   release of BitBake.
+
+      .. note::
+
+         Cloning the Git repository, as described earlier, is the preferred
+         method for getting BitBake. Cloning the repository makes it easier
+         to update as patches are added to the stable branches.
+
+   The following example downloads a snapshot of BitBake version 1.17.0::
+
+     $ wget https://git.openembedded.org/bitbake/snapshot/bitbake-1.17.0.tar.gz
+     $ tar zxpvf bitbake-1.17.0.tar.gz
+
+   After extraction of the tarball using
+   the tar utility, you have a directory entitled ``bitbake-1.17.0``.
+
+-  **Using the BitBake that Comes With Your Build Checkout:** A final
+   possibility for getting a copy of BitBake is that it already comes
+   with your checkout of a larger BitBake-based build system, such as
+   Poky. Rather than manually checking out individual layers and gluing
+   them together yourself, you can check out an entire build system. The
+   checkout will already include a version of BitBake that has been
+   thoroughly tested for compatibility with the other components. For
+   information on how to check out a particular BitBake-based build
+   system, consult that build system's supporting documentation.
+
+.. _bitbake-user-manual-command:
+
+The BitBake Command
+===================
+
+The ``bitbake`` command is the primary interface to the BitBake tool.
+This section presents the BitBake command syntax and provides several
+execution examples.
+
+Usage and syntax
+----------------
+
+Following is the usage and syntax for BitBake::
+
+   $ bitbake -h
+   Usage: bitbake [options] [recipename/target recipe:do_task ...]
+
+       Executes the specified task (default is 'build') for a given set of target recipes (.bb files).
+       It is assumed there is a conf/bblayers.conf available in cwd or in BBPATH which
+       will provide the layer, BBFILES and other configuration information.
+
+   Options:
+     --version             show program's version number and exit
+     -h, --help            show this help message and exit
+     -b BUILDFILE, --buildfile=BUILDFILE
+                           Execute tasks from a specific .bb recipe directly.
+                           WARNING: Does not handle any dependencies from other
+                           recipes.
+     -k, --continue        Continue as much as possible after an error. While the
+                           target that failed and anything depending on it cannot
+                           be built, as much as possible will be built before
+                           stopping.
+     -f, --force           Force the specified targets/task to run (invalidating
+                           any existing stamp file).
+     -c CMD, --cmd=CMD     Specify the task to execute. The exact options
+                           available depend on the metadata. Some examples might
+                           be 'compile' or 'populate_sysroot' or 'listtasks' may
+                           give a list of the tasks available.
+     -C INVALIDATE_STAMP, --clear-stamp=INVALIDATE_STAMP
+                           Invalidate the stamp for the specified task such as
+                           'compile' and then run the default task for the
+                           specified target(s).
+     -r PREFILE, --read=PREFILE
+                           Read the specified file before bitbake.conf.
+     -R POSTFILE, --postread=POSTFILE
+                           Read the specified file after bitbake.conf.
+     -v, --verbose         Enable tracing of shell tasks (with 'set -x'). Also
+                           print bb.note(...) messages to stdout (in addition to
+                           writing them to ${T}/log.do_&lt;task&gt;).
+     -D, --debug           Increase the debug level. You can specify this more
+                           than once. -D sets the debug level to 1, where only
+                           bb.debug(1, ...) messages are printed to stdout; -DD
+                           sets the debug level to 2, where both bb.debug(1, ...)
+                           and bb.debug(2, ...) messages are printed; etc.
+                           Without -D, no debug messages are printed. Note that
+                           -D only affects output to stdout. All debug messages
+                           are written to ${T}/log.do_taskname, regardless of the
+                           debug level.
+     -q, --quiet           Output less log message data to the terminal. You can
+                           specify this more than once.
+     -n, --dry-run         Don't execute, just go through the motions.
+     -S SIGNATURE_HANDLER, --dump-signatures=SIGNATURE_HANDLER
+                           Dump out the signature construction information, with
+                           no task execution. The SIGNATURE_HANDLER parameter is
+                           passed to the handler. Two common values are none and
+                           printdiff but the handler may define more/less. none
+                           means only dump the signature, printdiff means compare
+                           the dumped signature with the cached one.
+     -p, --parse-only      Quit after parsing the BB recipes.
+     -s, --show-versions   Show current and preferred versions of all recipes.
+     -e, --environment     Show the global or per-recipe environment complete
+                           with information about where variables were
+                           set/changed.
+     -g, --graphviz        Save dependency tree information for the specified
+                           targets in the dot syntax.
+     -I EXTRA_ASSUME_PROVIDED, --ignore-deps=EXTRA_ASSUME_PROVIDED
+                           Assume these dependencies don't exist and are already
+                           provided (equivalent to ASSUME_PROVIDED). Useful to
+                           make dependency graphs more appealing
+     -l DEBUG_DOMAINS, --log-domains=DEBUG_DOMAINS
+                           Show debug logging for the specified logging domains
+     -P, --profile         Profile the command and save reports.
+     -u UI, --ui=UI        The user interface to use (knotty, ncurses, taskexp or
+                           teamcity - default knotty).
+     --token=XMLRPCTOKEN   Specify the connection token to be used when
+                           connecting to a remote server.
+     --revisions-changed   Set the exit code depending on whether upstream
+                           floating revisions have changed or not.
+     --server-only         Run bitbake without a UI, only starting a server
+                           (cooker) process.
+     -B BIND, --bind=BIND  The name/address for the bitbake xmlrpc server to bind
+                           to.
+     -T SERVER_TIMEOUT, --idle-timeout=SERVER_TIMEOUT
+                           Set timeout to unload bitbake server due to
+                           inactivity, set to -1 means no unload, default:
+                           Environment variable BB_SERVER_TIMEOUT.
+     --no-setscene         Do not run any setscene tasks. sstate will be ignored
+                           and everything needed, built.
+     --skip-setscene       Skip setscene tasks if they would be executed. Tasks
+                           previously restored from sstate will be kept, unlike
+                           --no-setscene
+     --setscene-only       Only run setscene tasks, don't run any real tasks.
+     --remote-server=REMOTE_SERVER
+                           Connect to the specified server.
+     -m, --kill-server     Terminate any running bitbake server.
+     --observe-only        Connect to a server as an observing-only client.
+     --status-only         Check the status of the remote bitbake server.
+     -w WRITEEVENTLOG, --write-log=WRITEEVENTLOG
+                           Writes the event log of the build to a bitbake event
+                           json file. Use '' (empty string) to assign the name
+                           automatically.
+     --runall=RUNALL       Run the specified task for any recipe in the taskgraph
+                           of the specified target (even if it wouldn't otherwise
+                           have run).
+     --runonly=RUNONLY     Run only the specified task within the taskgraph of
+                           the specified targets (and any task dependencies those
+                           tasks may have).
+
+.. _bitbake-examples:
+
+Examples
+--------
+
+This section presents some examples showing how to use BitBake.
+
+.. _example-executing-a-task-against-a-single-recipe:
+
+Executing a Task Against a Single Recipe
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Executing tasks for a single recipe file is relatively simple. You
+specify the file in question, and BitBake parses it and executes the
+specified task. If you do not specify a task, BitBake executes the
+default task, which is "build". BitBake obeys inter-task dependencies
+when doing so.
+
+The following command runs the build task, which is the default task, on
+the ``foo_1.0.bb`` recipe file::
+
+  $ bitbake -b foo_1.0.bb
+
+The following command runs the clean task on the ``foo.bb`` recipe file::
+
+  $ bitbake -b foo.bb -c clean
+
+.. note::
+
+   The "-b" option explicitly does not handle recipe dependencies. Other
+   than for debugging purposes, it is instead recommended that you use
+   the syntax presented in the next section.
+
+Executing Tasks Against a Set of Recipe Files
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+There are a number of additional complexities introduced when one wants
+to manage multiple ``.bb`` files. Clearly there needs to be a way to
+tell BitBake what files are available and, of those, which you want to
+execute. There also needs to be a way for each recipe to express its
+dependencies, both for build-time and runtime. There must be a way for
+you to express recipe preferences when multiple recipes provide the same
+functionality, or when there are multiple versions of a recipe.
+
+The ``bitbake`` command, when not using "--buildfile" or "-b" only
+accepts a "PROVIDES". You cannot provide anything else. By default, a
+recipe file generally "PROVIDES" its "packagename" as shown in the
+following example::
+
+  $ bitbake foo
+
+This next example "PROVIDES" the
+package name and also uses the "-c" option to tell BitBake to just
+execute the ``do_clean`` task::
+
+  $ bitbake -c clean foo
+
+Executing a List of Task and Recipe Combinations
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The BitBake command line supports specifying different tasks for
+individual targets when you specify multiple targets. For example,
+suppose you had two targets (or recipes) ``myfirstrecipe`` and
+``mysecondrecipe`` and you needed BitBake to run ``taskA`` for the first
+recipe and ``taskB`` for the second recipe::
+
+  $ bitbake myfirstrecipe:do_taskA mysecondrecipe:do_taskB
+
+Generating Dependency Graphs
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+BitBake is able to generate dependency graphs using the ``dot`` syntax.
+You can convert these graphs into images using the ``dot`` tool from
+`Graphviz <http://www.graphviz.org>`__.
+
+When you generate a dependency graph, BitBake writes two files to the
+current working directory:
+
+-  ``task-depends.dot``: Shows dependencies between tasks. These
+   dependencies match BitBake's internal task execution list.
+
+-  ``pn-buildlist``: Shows a simple list of targets that are to be
+   built.
+
+To stop depending on common depends, use the ``-I`` depend option and
+BitBake omits them from the graph. Leaving this information out can
+produce more readable graphs. This way, you can remove from the graph
+:term:`DEPENDS` from inherited classes such as ``base.bbclass``.
+
+Here are two examples that create dependency graphs. The second example
+omits depends common in OpenEmbedded from the graph::
+
+  $ bitbake -g foo
+
+  $ bitbake -g -I virtual/kernel -I eglibc foo
+
+Executing a Multiple Configuration Build
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+BitBake is able to build multiple images or packages using a single
+command where the different targets require different configurations
+(multiple configuration builds). Each target, in this scenario, is
+referred to as a "multiconfig".
+
+To accomplish a multiple configuration build, you must define each
+target's configuration separately using a parallel configuration file in
+the build directory. The location for these multiconfig configuration
+files is specific. They must reside in the current build directory in a
+sub-directory of ``conf`` named ``multiconfig``. Following is an example
+for two separate targets:
+
+.. image:: figures/bb_multiconfig_files.png
+   :align: center
+
+The reason for this required file hierarchy is because the :term:`BBPATH`
+variable is not constructed until the layers are parsed. Consequently,
+using the configuration file as a pre-configuration file is not possible
+unless it is located in the current working directory.
+
+Minimally, each configuration file must define the machine and the
+temporary directory BitBake uses for the build. Suggested practice
+dictates that you do not overlap the temporary directories used during
+the builds.
+
+Aside from separate configuration files for each target, you must also
+enable BitBake to perform multiple configuration builds. Enabling is
+accomplished by setting the
+:term:`BBMULTICONFIG` variable in the
+``local.conf`` configuration file. As an example, suppose you had
+configuration files for ``target1`` and ``target2`` defined in the build
+directory. The following statement in the ``local.conf`` file both
+enables BitBake to perform multiple configuration builds and specifies
+the two extra multiconfigs::
+
+  BBMULTICONFIG = "target1 target2"
+
+Once the target configuration files are in place and BitBake has been
+enabled to perform multiple configuration builds, use the following
+command form to start the builds::
+
+  $ bitbake [mc:multiconfigname:]target [[[mc:multiconfigname:]target] ... ]
+
+Here is an example for two extra multiconfigs: ``target1`` and ``target2``::
+
+  $ bitbake mc::target mc:target1:target mc:target2:target
+
+.. _bb-enabling-multiple-configuration-build-dependencies:
+
+Enabling Multiple Configuration Build Dependencies
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Sometimes dependencies can exist between targets (multiconfigs) in a
+multiple configuration build. For example, suppose that in order to
+build an image for a particular architecture, the root filesystem of
+another build for a different architecture needs to exist. In other
+words, the image for the first multiconfig depends on the root
+filesystem of the second multiconfig. This dependency is essentially
+that the task in the recipe that builds one multiconfig is dependent on
+the completion of the task in the recipe that builds another
+multiconfig.
+
+To enable dependencies in a multiple configuration build, you must
+declare the dependencies in the recipe using the following statement
+form::
+
+  task_or_package[mcdepends] = "mc:from_multiconfig:to_multiconfig:recipe_name:task_on_which_to_depend"
+
+To better show how to use this statement, consider an example with two
+multiconfigs: ``target1`` and ``target2``::
+
+  image_task[mcdepends] = "mc:target1:target2:image2:rootfs_task"
+
+In this example, the
+``from_multiconfig`` is "target1" and the ``to_multiconfig`` is "target2". The
+task on which the image whose recipe contains image_task depends on the
+completion of the rootfs_task used to build out image2, which is
+associated with the "target2" multiconfig.
+
+Once you set up this dependency, you can build the "target1" multiconfig
+using a BitBake command as follows::
+
+  $ bitbake mc:target1:image1
+
+This command executes all the tasks needed to create ``image1`` for the "target1"
+multiconfig. Because of the dependency, BitBake also executes through
+the ``rootfs_task`` for the "target2" multiconfig build.
+
+Having a recipe depend on the root filesystem of another build might not
+seem that useful. Consider this change to the statement in the image1
+recipe::
+
+  image_task[mcdepends] = "mc:target1:target2:image2:image_task"
+
+In this case, BitBake must create ``image2`` for the "target2" build since
+the "target1" build depends on it.
+
+Because "target1" and "target2" are enabled for multiple configuration
+builds and have separate configuration files, BitBake places the
+artifacts for each build in the respective temporary build directories.

bitbake/doc/bitbake.1

@@ -0,0 +1,142 @@
+.\"                                      Hey, EMACS: -*- nroff -*-
+.\" First parameter, NAME, should be all caps
+.\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
+.\" other parameters are allowed: see man(7), man(1)
+.TH BITBAKE 1 "November 19, 2006"
+.\" Please adjust this date whenever revising the manpage.
+.\"
+.\" Some roff macros, for reference:
+.\" .nh        disable hyphenation
+.\" .hy        enable hyphenation
+.\" .ad l      left justify
+.\" .ad b      justify to both left and right margins
+.\" .nf        disable filling
+.\" .fi        enable filling
+.\" .br        insert line break
+.\" .sp <n>    insert n+1 empty lines
+.\" for manpage-specific macros, see man(7)
+.SH NAME
+BitBake \- simple tool for the execution of tasks
+.SH SYNOPSIS
+.B bitbake
+.RI [ options ] " packagenames"
+.br
+.SH DESCRIPTION
+This manual page documents briefly the
+.B bitbake
+command.
+.PP
+.\" TeX users may be more comfortable with the \fB<whatever>\fP and
+.\" \fI<whatever>\fP escape sequences to invode bold face and italics, 
+.\" respectively.
+\fBbitbake\fP is a program that executes the specified task (default is 'build')
+for a given set of BitBake files.
+.br
+It expects that BBFILES is defined, which is a space separated list of files to
+be executed. BBFILES does support wildcards.
+.br
+Default BBFILES are the .bb files in the current directory.
+.SH OPTIONS
+This program follow the usual GNU command line syntax, with long
+options starting with two dashes (`-').
+.TP
+.B \-h, \-\-help
+Show summary of options.
+.TP
+.B \-\-version
+Show version of program.
+.TP
+.B \-bBUILDFILE, \-\-buildfile=BUILDFILE
+execute the task against this .bb file, rather than a package from BBFILES.
+.TP
+.B \-k, \-\-continue
+continue as much as possible after an error. While the target that failed, and
+those that depend on it, cannot be remade, the other dependencies of these
+targets can be processed all the same.
+.TP
+.B \-a, \-\-tryaltconfigs
+continue with builds by trying to use alternative providers where possible.
+.TP
+.B \-f, \-\-force
+force run of specified cmd, regardless of stamp status
+.TP
+.B \-i, \-\-interactive
+drop into the interactive mode also called the BitBake shell.
+.TP
+.B \-cCMD, \-\-cmd=CMD
+Specify task to execute. Note that this only executes the specified task for
+the providee and the packages it depends on, i.e. 'compile' does not implicitly
+call stage for the dependencies (IOW: use only if you know what you are doing).
+Depending on the base.bbclass a listtasks task is defined and will show
+available tasks.
+.TP
+.B \-rFILE, \-\-read=FILE 
+read the specified file before bitbake.conf
+.TP
+.B \-v, \-\-verbose
+output more chit-chat to the terminal
+.TP
+.B \-D, \-\-debug
+Increase the debug level. You can specify this more than once.
+.TP
+.B \-n, \-\-dry-run
+don't execute, just go through the motions
+.TP
+.B \-p, \-\-parse-only
+quit after parsing the BB files (developers only)
+.TP
+.B \-s, \-\-show-versions
+show current and preferred versions of all packages
+.TP
+.B \-e, \-\-environment
+show the global or per-recipe environment (this is what used to be bbread)
+.TP
+.B \-g, \-\-graphviz
+emit the dependency trees of the specified packages in the dot syntax
+.TP
+.B \-IIGNORED\_DOT\_DEPS, \-\-ignore-deps=IGNORED_DOT_DEPS
+Stop processing at the given list of dependencies when generating dependency
+graphs. This can help to make the graph more appealing
+.TP
+.B \-lDEBUG_DOMAINS, \-\-log-domains=DEBUG_DOMAINS
+Show debug logging for the specified logging domains
+.TP
+.B \-P, \-\-profile
+profile the command and print a report
+.TP
+.B \-uUI, \-\-ui=UI
+User interface to use. Currently, knotty, taskexp or ncurses can be specified as UI.
+.TP
+.B \-tSERVERTYPE, \-\-servertype=SERVERTYPE
+Choose which server to use, none, process or xmlrpc.
+.TP
+.B \-\-revisions-changed
+Set the exit code depending on whether upstream floating revisions have changed or not.
+.TP
+.B \-\-server-only
+Run bitbake without UI,  the frontend can connect with bitbake server itself.
+.TP
+.B \-BBIND, \-\-bind=BIND
+The name/address for the bitbake server to bind to.
+.TP
+.B \-\-no\-setscene
+Do not run any setscene tasks, forces builds.
+
+.SH ENVIRONMENT VARIABLES
+bitbake uses the following environment variables to control its
+operation:
+.TP
+.B BITBAKE_UI
+The bitbake user interface; overridden by the \fB-u\fP commandline option.
+
+.SH AUTHORS
+BitBake was written by 
+Phil Blundell,
+Holger Freyther,
+Chris Larson,
+Mickey Lauer,
+Richard Purdie,
+Holger Schurig
+.PP
+This manual page was written by Marcin Juszkiewicz <marcin@hrw.one.pl>
+for the Debian project (but may be used by others).

bitbake/doc/conf.py

@@ -0,0 +1,101 @@
+# Configuration file for the Sphinx documentation builder.
+#
+# This file only contains a selection of the most common options. For a full
+# list see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+
+# -- Path setup --------------------------------------------------------------
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+#
+# import os
+# import sys
+# sys.path.insert(0, os.path.abspath('.'))
+
+import sys
+import datetime
+
+current_version = "dev"
+
+# String used in sidebar
+version = 'Version: ' + current_version
+if current_version == 'dev':
+    version = 'Version: Current Development'
+# Version seen in documentation_options.js and hence in js switchers code
+release = current_version
+
+# -- Project information -----------------------------------------------------
+
+project = 'Bitbake'
+copyright = '2004-%s, Richard Purdie, Chris Larson, and Phil Blundell' \
+    % datetime.datetime.now().year
+author = 'Richard Purdie, Chris Larson, and Phil Blundell'
+
+# external links and substitutions
+extlinks = {
+    'yocto_docs': ('https://docs.yoctoproject.org%s', None),
+    'oe_lists': ('https://lists.openembedded.org%s', None),
+}
+
+# -- General configuration ---------------------------------------------------
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+    'sphinx.ext.autosectionlabel',
+    'sphinx.ext.extlinks',
+]
+autosectionlabel_prefix_document = True
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ['_templates']
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This pattern also affects html_static_path and html_extra_path.
+exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
+
+# master document name. The default changed from contents to index. so better
+# set it ourselves.
+master_doc = 'index'
+
+# create substitution for project configuration variables
+rst_prolog = """
+.. |project_name| replace:: %s
+.. |copyright| replace:: %s
+.. |author| replace:: %s
+""" % (project, copyright, author)
+
+# -- Options for HTML output -------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+#
+try:
+    import sphinx_rtd_theme
+    html_theme = 'sphinx_rtd_theme'
+except ImportError:
+    sys.stderr.write("The Sphinx sphinx_rtd_theme HTML theme was not found.\
+    \nPlease make sure to install the sphinx_rtd_theme python package.\n")
+    sys.exit(1)
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = ['sphinx-static']
+
+# Add customm CSS and JS files
+html_css_files = ['theme_overrides.css']
+html_js_files = ['switchers.js']
+
+# Hide 'Created using Sphinx' text
+html_show_sphinx = False
+
+# Add 'Last updated' on each page
+html_last_updated_fmt = '%b %d, %Y'
+
+# Remove the trailing 'dot' in section numbers
+html_secnumber_suffix = " "

bitbake/doc/genindex.rst

@@ -0,0 +1,3 @@
+=====
+Index
+=====

bitbake/doc/index.rst

@@ -0,0 +1,38 @@
+.. SPDX-License-Identifier: CC-BY-2.5
+
+===================
+BitBake User Manual
+===================
+
+|
+
+.. toctree::
+   :caption: Table of Contents
+   :numbered:
+
+   bitbake-user-manual/bitbake-user-manual-intro
+   bitbake-user-manual/bitbake-user-manual-execution
+   bitbake-user-manual/bitbake-user-manual-metadata
+   bitbake-user-manual/bitbake-user-manual-fetching
+   bitbake-user-manual/bitbake-user-manual-ref-variables
+   bitbake-user-manual/bitbake-user-manual-hello
+
+.. toctree::
+   :maxdepth: 1
+   :hidden:
+
+   genindex
+   releases
+
+----
+
+.. include:: <xhtml1-lat1.txt>
+
+| BitBake Community
+| Copyright |copy| |copyright|
+| <bitbake-devel@lists.openembedded.org>
+
+This work is licensed under the Creative Commons Attribution License.  To view a
+copy of this license, visit http://creativecommons.org/licenses/by/2.5/ or send
+a letter to Creative Commons, 444 Castro Street, Suite 900, Mountain View,
+California 94041, USA.

bitbake/doc/releases.rst

@@ -0,0 +1,168 @@
+.. SPDX-License-Identifier: CC-BY-2.5
+
+=================================
+BitBake Supported Release Manuals
+=================================
+
+*****************************
+Release Series 4.1 (langdale)
+*****************************
+
+- :yocto_docs:`BitBake 2.2 User Manual </bitbake/2.2/>`
+
+*****************************
+Release Series 4.0 (kirstone)
+*****************************
+
+- :yocto_docs:`BitBake 2.0 User Manual </bitbake/2.0/>`
+
+****************************
+Release Series 3.1 (dunfell)
+****************************
+
+- :yocto_docs:`BitBake 1.46 User Manual </bitbake/1.46/>`
+
+================================
+BitBake Outdated Release Manuals
+================================
+
+******************************
+Release Series 3.4 (honister)
+******************************
+
+- :yocto_docs:`BitBake 1.52 User Manual </bitbake/1.52/>`
+
+******************************
+Release Series 3.3 (hardknott)
+******************************
+
+- :yocto_docs:`BitBake 1.50 User Manual </bitbake/1.50/>`
+
+*******************************
+Release Series 3.2 (gatesgarth)
+*******************************
+
+- :yocto_docs:`BitBake 1.48 User Manual </bitbake/1.48/>`
+
+*******************************************
+Release Series 3.1 (dunfell first versions)
+*******************************************
+
+- :yocto_docs:`3.1 BitBake User Manual </3.1/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`3.1.1 BitBake User Manual </3.1.1/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`3.1.2 BitBake User Manual </3.1.2/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`3.1.3 BitBake User Manual </3.1.3/bitbake-user-manual/bitbake-user-manual.html>`
+
+*************************
+Release Series 3.0 (zeus)
+*************************
+
+- :yocto_docs:`3.0 BitBake User Manual </3.0/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`3.0.1 BitBake User Manual </3.0.1/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`3.0.2 BitBake User Manual </3.0.2/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`3.0.3 BitBake User Manual </3.0.3/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`3.0.4 BitBake User Manual </3.0.4/bitbake-user-manual/bitbake-user-manual.html>`
+
+****************************
+Release Series 2.7 (warrior)
+****************************
+
+- :yocto_docs:`2.7 BitBake User Manual </2.7/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.7.1 BitBake User Manual </2.7.1/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.7.2 BitBake User Manual </2.7.2/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.7.3 BitBake User Manual </2.7.3/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.7.4 BitBake User Manual </2.7.4/bitbake-user-manual/bitbake-user-manual.html>`
+
+*************************
+Release Series 2.6 (thud)
+*************************
+
+- :yocto_docs:`2.6 BitBake User Manual </2.6/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.6.1 BitBake User Manual </2.6.1/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.6.2 BitBake User Manual </2.6.2/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.6.3 BitBake User Manual </2.6.3/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.6.4 BitBake User Manual </2.6.4/bitbake-user-manual/bitbake-user-manual.html>`
+
+*************************
+Release Series 2.5 (sumo)
+*************************
+
+- :yocto_docs:`2.5 Documentation </2.5>`
+- :yocto_docs:`2.5.1 Documentation </2.5.1>`
+- :yocto_docs:`2.5.2 Documentation </2.5.2>`
+- :yocto_docs:`2.5.3 Documentation </2.5.3>`
+
+**************************
+Release Series 2.4 (rocko)
+**************************
+
+- :yocto_docs:`2.4 BitBake User Manual </2.4/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.4.1 BitBake User Manual </2.4.1/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.4.2 BitBake User Manual </2.4.2/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.4.3 BitBake User Manual </2.4.3/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.4.4 BitBake User Manual </2.4.4/bitbake-user-manual/bitbake-user-manual.html>`
+
+*************************
+Release Series 2.3 (pyro)
+*************************
+
+- :yocto_docs:`2.3 BitBake User Manual </2.3/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.3.1 BitBake User Manual </2.3.1/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.3.2 BitBake User Manual </2.3.2/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.3.3 BitBake User Manual </2.3.3/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.3.4 BitBake User Manual </2.3.4/bitbake-user-manual/bitbake-user-manual.html>`
+
+**************************
+Release Series 2.2 (morty)
+**************************
+
+- :yocto_docs:`2.2 BitBake User Manual </2.2/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.2.1 BitBake User Manual </2.2.1/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.2.2 BitBake User Manual </2.2.2/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.2.3 BitBake User Manual </2.2.3/bitbake-user-manual/bitbake-user-manual.html>`
+
+****************************
+Release Series 2.1 (krogoth)
+****************************
+
+- :yocto_docs:`2.1 BitBake User Manual </2.1/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.1.1 BitBake User Manual </2.1.1/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.1.2 BitBake User Manual </2.1.2/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.1.3 BitBake User Manual </2.1.3/bitbake-user-manual/bitbake-user-manual.html>`
+
+***************************
+Release Series 2.0 (jethro)
+***************************
+
+- :yocto_docs:`1.9 BitBake User Manual </1.9/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.0 BitBake User Manual </2.0/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.0.1 BitBake User Manual </2.0.1/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.0.2 BitBake User Manual </2.0.2/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`2.0.3 BitBake User Manual </2.0.3/bitbake-user-manual/bitbake-user-manual.html>`
+
+*************************
+Release Series 1.8 (fido)
+*************************
+
+- :yocto_docs:`1.8 BitBake User Manual </1.8/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`1.8.1 BitBake User Manual </1.8.1/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`1.8.2 BitBake User Manual </1.8.2/bitbake-user-manual/bitbake-user-manual.html>`
+
+**************************
+Release Series 1.7 (dizzy)
+**************************
+
+- :yocto_docs:`1.7 BitBake User Manual </1.7/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`1.7.1 BitBake User Manual </1.7.1/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`1.7.2 BitBake User Manual </1.7.2/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`1.7.3 BitBake User Manual </1.7.3/bitbake-user-manual/bitbake-user-manual.html>`
+
+**************************
+Release Series 1.6 (daisy)
+**************************
+
+- :yocto_docs:`1.6 BitBake User Manual </1.6/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`1.6.1 BitBake User Manual </1.6.1/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`1.6.2 BitBake User Manual </1.6.2/bitbake-user-manual/bitbake-user-manual.html>`
+- :yocto_docs:`1.6.3 BitBake User Manual </1.6.3/bitbake-user-manual/bitbake-user-manual.html>`
+

bitbake/doc/sphinx-static/switchers.js

@@ -0,0 +1,233 @@
+(function() {
+  'use strict';
+
+  var all_versions = {
+    'dev': 'dev (3.2)',
+    '3.1.2': '3.1.2',
+    '3.0.3': '3.0.3',
+    '2.7.4': '2.7.4',
+  };
+
+  var all_doctypes = {
+      'single': 'Individual Webpages',
+      'mega': "All-in-one 'Mega' Manual",
+  };
+
+  // Simple version comparision
+  // Return 1 if a > b
+  // Return -1 if a < b
+  // Return 0 if a == b
+  function ver_compare(a, b) {
+    if (a == "dev") {
+       return 1;
+    }
+
+    if (a === b) {
+       return 0;
+    }
+
+    var a_components = a.split(".");
+    var b_components = b.split(".");
+
+    var len = Math.min(a_components.length, b_components.length);
+
+    // loop while the components are equal
+    for (var i = 0; i < len; i++) {
+        // A bigger than B
+        if (parseInt(a_components[i]) > parseInt(b_components[i])) {
+            return 1;
+        }
+
+        // B bigger than A
+        if (parseInt(a_components[i]) < parseInt(b_components[i])) {
+            return -1;
+        }
+    }
+
+    // If one's a prefix of the other, the longer one is greater.
+    if (a_components.length > b_components.length) {
+        return 1;
+    }
+
+    if (a_components.length < b_components.length) {
+        return -1;
+    }
+
+    // Otherwise they are the same.
+    return 0;
+  }
+
+  function build_version_select(current_series, current_version) {
+    var buf = ['<select>'];
+
+    $.each(all_versions, function(version, title) {
+      var series = version.substr(0, 3);
+      if (series == current_series) {
+        if (version == current_version)
+            buf.push('<option value="' + version + '" selected="selected">' + title + '</option>');
+        else
+            buf.push('<option value="' + version + '">' + title + '</option>');
+
+        if (version != current_version)
+            buf.push('<option value="' + current_version + '" selected="selected">' + current_version + '</option>');
+      } else {
+        buf.push('<option value="' + version + '">' + title + '</option>');
+      }
+    });
+
+    buf.push('</select>');
+    return buf.join('');
+  }
+
+  function build_doctype_select(current_doctype) {
+    var buf = ['<select>'];
+
+    $.each(all_doctypes, function(doctype, title) {
+      if (doctype == current_doctype)
+        buf.push('<option value="' + doctype + '" selected="selected">' +
+                 all_doctypes[current_doctype] + '</option>');
+      else
+        buf.push('<option value="' + doctype + '">' + title + '</option>');
+    });
+    if (!(current_doctype in all_doctypes)) {
+        // In case we're browsing a doctype that is not yet in all_doctypes.
+        buf.push('<option value="' + current_doctype + '" selected="selected">' +
+                 current_doctype + '</option>');
+        all_doctypes[current_doctype] = current_doctype;
+    }
+    buf.push('</select>');
+    return buf.join('');
+  }
+
+  function navigate_to_first_existing(urls) {
+    // Navigate to the first existing URL in urls.
+    var url = urls.shift();
+
+    // Web browsers won't redirect file:// urls to file urls using ajax but
+    // its useful for local testing
+    if (url.startsWith("file://")) {
+      window.location.href = url;
+      return;
+    }
+
+    if (urls.length == 0) {
+      window.location.href = url;
+      return;
+    }
+    $.ajax({
+      url: url,
+      success: function() {
+        window.location.href = url;
+      },
+      error: function() {
+        navigate_to_first_existing(urls);
+      }
+    });
+  }
+
+  function get_docroot_url() {
+    var url = window.location.href;
+    var root = DOCUMENTATION_OPTIONS.URL_ROOT;
+
+    var urlarray = url.split('/');
+    // Trim off anything after '/'
+    urlarray.pop();
+    var depth = (root.match(/\.\.\//g) || []).length;
+    for (var i = 0; i < depth; i++) {
+      urlarray.pop();
+    }
+
+    return urlarray.join('/') + '/';
+  }
+
+  function on_version_switch() {
+    var selected_version = $(this).children('option:selected').attr('value');
+    var url = window.location.href;
+    var current_version = DOCUMENTATION_OPTIONS.VERSION;
+    var docroot = get_docroot_url()
+
+    var new_versionpath = selected_version + '/';
+    if (selected_version == "dev")
+        new_versionpath = '';
+
+    // dev versions have no version prefix
+    if (current_version == "dev") {
+        var new_url = docroot + new_versionpath + url.replace(docroot, "");
+        var fallback_url = docroot + new_versionpath;
+    } else {
+        var new_url = url.replace('/' + current_version + '/', '/' + new_versionpath);
+        var fallback_url = new_url.replace(url.replace(docroot, ""), "");
+    }
+
+    console.log(get_docroot_url())
+    console.log(url + " to url " + new_url);
+    console.log(url + " to fallback " + fallback_url);
+
+    if (new_url != url) {
+      navigate_to_first_existing([
+        new_url,
+        fallback_url,
+        'https://www.yoctoproject.org/docs/',
+      ]);
+    }
+  }
+
+  function on_doctype_switch() {
+    var selected_doctype = $(this).children('option:selected').attr('value');
+    var url = window.location.href;
+    if (selected_doctype == 'mega') {
+      var docroot = get_docroot_url()
+      var current_version = DOCUMENTATION_OPTIONS.VERSION;
+      // Assume manuals before 3.2 are using old docbook mega-manual
+      if (ver_compare(current_version, "3.2") < 0) {
+        var new_url = docroot + "mega-manual/mega-manual.html";
+      } else {
+        var new_url = docroot + "singleindex.html";
+      }
+    } else {
+      var new_url = url.replace("singleindex.html", "index.html")
+    }
+
+    if (new_url != url) {
+      navigate_to_first_existing([
+        new_url,
+        'https://www.yoctoproject.org/docs/',
+      ]);
+    }
+  }
+
+  // Returns the current doctype based upon the url
+  function doctype_segment_from_url(url) {
+    if (url.includes("singleindex") || url.includes("mega-manual"))
+      return "mega";
+    return "single";
+  }
+
+  $(document).ready(function() {
+    var release = DOCUMENTATION_OPTIONS.VERSION;
+    var current_doctype = doctype_segment_from_url(window.location.href);
+    var current_series = release.substr(0, 3);
+    var version_select = build_version_select(current_series, release);
+
+    $('.version_switcher_placeholder').html(version_select);
+    $('.version_switcher_placeholder select').bind('change', on_version_switch);
+
+    var doctype_select = build_doctype_select(current_doctype);
+
+    $('.doctype_switcher_placeholder').html(doctype_select);
+    $('.doctype_switcher_placeholder select').bind('change', on_doctype_switch);
+
+    if (ver_compare(release, "3.1") < 0) {
+      $('#outdated-warning').html('Version ' + release + ' of the project is now considered obsolete, please select and use a more recent version');
+      $('#outdated-warning').css('padding', '.5em');
+    } else if (release != "dev") {
+      $.each(all_versions, function(version, title) {
+        var series = version.substr(0, 3);
+        if (series == current_series && version != release) {
+          $('#outdated-warning').html('This document is for outdated version ' + release + ', you should select the latest release version in this series, ' + version + '.');
+          $('#outdated-warning').css('padding', '.5em');
+        }
+      });
+    }
+  });
+})();

bitbake/doc/sphinx-static/theme_overrides.css

@@ -0,0 +1,162 @@
+/*
+    SPDX-License-Identifier: CC-BY-2.0-UK
+*/
+
+body {
+  font-family: Verdana, Sans, sans-serif;
+  margin:  0em auto;
+  color: #333;
+}
+
+h1,h2,h3,h4,h5,h6,h7 {
+  font-family: Arial, Sans;
+  color: #00557D;
+  clear: both;
+}
+
+h1 {
+  font-size: 2em;
+  text-align: left;
+  padding: 0em 0em 0em 0em;
+  margin: 2em 0em 0em 0em;
+}
+
+h2.subtitle {
+  margin: 0.10em 0em 3.0em 0em;
+  padding: 0em 0em 0em 0em;
+  font-size: 1.8em;
+  padding-left: 20%;
+  font-weight: normal;
+  font-style: italic;
+}
+
+h2 {
+  margin: 2em 0em 0.66em 0em;
+  padding: 0.5em 0em 0em 0em;
+  font-size: 1.5em;
+  font-weight: bold;
+}
+
+h3.subtitle {
+  margin: 0em 0em 1em 0em;
+  padding: 0em 0em 0em 0em;
+  font-size: 142.14%;
+  text-align: right;
+}
+
+h3 {
+  margin: 1em 0em 0.5em 0em;
+  padding: 1em 0em 0em 0em;
+  font-size: 140%;
+  font-weight: bold;
+}
+
+h4 {
+  margin: 1em 0em 0.5em 0em;
+  padding: 1em 0em 0em 0em;
+  font-size: 120%;
+  font-weight: bold;
+}
+
+h5 {
+  margin: 1em 0em 0.5em 0em;
+  padding: 1em 0em 0em 0em;
+  font-size: 110%;
+  font-weight: bold;
+}
+
+h6 {
+  margin: 1em 0em 0em 0em;
+  padding: 1em 0em 0em 0em;
+  font-size: 110%;
+  font-weight: bold;
+}
+
+em {
+  font-weight: bold;
+}
+
+.pre {
+  font-size: medium;
+  font-family: Courier, monospace;
+}
+
+.wy-nav-content a {
+  text-decoration: underline;
+  color: #444;
+  background: transparent;
+}
+
+.wy-nav-content a:hover {
+  text-decoration: underline;
+  background-color: #dedede;
+}
+
+.wy-nav-content a:visited {
+  color: #444;
+}
+
+[alt='Permalink'] { color: #eee; }
+[alt='Permalink']:hover { color: black; }
+
+@media screen {
+    /* content column
+     *
+     * RTD theme's default is 800px as max width for the content, but we have
+     * tables with tons of columns, which need the full width of the view-port.
+     */
+
+    .wy-nav-content{max-width: none; }
+
+    /* inline literal: drop the borderbox, padding and red color */
+    code, .rst-content tt, .rst-content code {
+        color: inherit;
+        border: none;
+        padding: unset;
+        background: inherit;
+        font-size: 85%;
+    }
+
+    .rst-content tt.literal,.rst-content tt.literal,.rst-content code.literal {
+        color: inherit;
+    }
+
+    /* Admonition should be gray, not blue or green */
+    .rst-content .note .admonition-title,
+    .rst-content .tip .admonition-title,
+    .rst-content .warning .admonition-title,
+    .rst-content .caution .admonition-title,
+    .rst-content .important .admonition-title {
+        background: #f0f0f2;
+        color: #00557D;
+
+    }
+
+    .rst-content .note,
+    .rst-content .tip,
+    .rst-content .important,
+    .rst-content .warning,
+    .rst-content .caution  {
+        background: #f0f0f2;
+    }
+
+    /* Remove the icon in front of note/tip element, and before the logo */
+    .icon-home:before, .rst-content .admonition-title:before {
+        display: none
+    }
+
+    /* a custom informalexample container is used in some doc */
+    .informalexample {
+        border: 1px solid;
+        border-color: #aaa;
+        margin: 1em 0em;
+        padding: 1em;
+        page-break-inside: avoid;
+    }
+
+    /* Remove the blue background in the top left corner, around the logo */
+    .wy-side-nav-search {
+        background: inherit;
+    }
+
+}

bitbake/lib/bb/COW.py

@@ -0,0 +1,197 @@
+#
+# This is a copy on write dictionary and set which abuses classes to try and be nice and fast.
+#
+# Copyright (C) 2006 Tim Ansell
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Please Note:
+# Be careful when using mutable types (ie Dict and Lists) - operations involving these are SLOW.
+# Assign a file to __warn__ to get warnings about slow operations.
+#
+
+
+import copy
+
+ImmutableTypes = (
+    bool,
+    complex,
+    float,
+    int,
+    tuple,
+    frozenset,
+    str
+)
+
+MUTABLE = "__mutable__"
+
+
+class COWMeta(type):
+    pass
+
+
+class COWDictMeta(COWMeta):
+    __warn__ = False
+    __hasmutable__ = False
+    __marker__ = tuple()
+
+    def __str__(cls):
+        # FIXME: I have magic numbers!
+        return "<COWDict Level: %i Current Keys: %i>" % (cls.__count__, len(cls.__dict__) - 3)
+
+    __repr__ = __str__
+
+    def cow(cls):
+        class C(cls):
+            __count__ = cls.__count__ + 1
+
+        return C
+
+    copy = cow
+    __call__ = cow
+
+    def __setitem__(cls, key, value):
+        if value is not None and not isinstance(value, ImmutableTypes):
+            if not isinstance(value, COWMeta):
+                cls.__hasmutable__ = True
+            key += MUTABLE
+        setattr(cls, key, value)
+
+    def __getmutable__(cls, key, readonly=False):
+        nkey = key + MUTABLE
+        try:
+            return cls.__dict__[nkey]
+        except KeyError:
+            pass
+
+        value = getattr(cls, nkey)
+        if readonly:
+            return value
+
+        if not cls.__warn__ is False and not isinstance(value, COWMeta):
+            print("Warning: Doing a copy because %s is a mutable type." % key, file=cls.__warn__)
+        try:
+            value = value.copy()
+        except AttributeError as e:
+            value = copy.copy(value)
+        setattr(cls, nkey, value)
+        return value
+
+    __getmarker__ = []
+
+    def __getreadonly__(cls, key, default=__getmarker__):
+        """
+        Get a value (even if mutable) which you promise not to change.
+        """
+        return cls.__getitem__(key, default, True)
+
+    def __getitem__(cls, key, default=__getmarker__, readonly=False):
+        try:
+            try:
+                value = getattr(cls, key)
+            except AttributeError:
+                value = cls.__getmutable__(key, readonly)
+
+            # This is for values which have been deleted
+            if value is cls.__marker__:
+                raise AttributeError("key %s does not exist." % key)
+
+            return value
+        except AttributeError as e:
+            if not default is cls.__getmarker__:
+                return default
+
+            raise KeyError(str(e))
+
+    def __delitem__(cls, key):
+        cls.__setitem__(key, cls.__marker__)
+
+    def __revertitem__(cls, key):
+        if key not in cls.__dict__:
+            key += MUTABLE
+        delattr(cls, key)
+
+    def __contains__(cls, key):
+        return cls.has_key(key)
+
+    def has_key(cls, key):
+        value = cls.__getreadonly__(key, cls.__marker__)
+        if value is cls.__marker__:
+            return False
+        return True
+
+    def iter(cls, type, readonly=False):
+        for key in dir(cls):
+            if key.startswith("__"):
+                continue
+
+            if key.endswith(MUTABLE):
+                key = key[:-len(MUTABLE)]
+
+            if type == "keys":
+                yield key
+
+            try:
+                if readonly:
+                    value = cls.__getreadonly__(key)
+                else:
+                    value = cls[key]
+            except KeyError:
+                continue
+
+            if type == "values":
+                yield value
+            if type == "items":
+                yield (key, value)
+        return
+
+    def iterkeys(cls):
+        return cls.iter("keys")
+
+    def itervalues(cls, readonly=False):
+        if not cls.__warn__ is False and cls.__hasmutable__ and readonly is False:
+            print("Warning: If you aren't going to change any of the values call with True.", file=cls.__warn__)
+        return cls.iter("values", readonly)
+
+    def iteritems(cls, readonly=False):
+        if not cls.__warn__ is False and cls.__hasmutable__ and readonly is False:
+            print("Warning: If you aren't going to change any of the values call with True.", file=cls.__warn__)
+        return cls.iter("items", readonly)
+
+
+class COWSetMeta(COWDictMeta):
+    def __str__(cls):
+        # FIXME: I have magic numbers!
+        return "<COWSet Level: %i Current Keys: %i>" % (cls.__count__, len(cls.__dict__) - 3)
+
+    __repr__ = __str__
+
+    def cow(cls):
+        class C(cls):
+            __count__ = cls.__count__ + 1
+
+        return C
+
+    def add(cls, value):
+        COWDictMeta.__setitem__(cls, repr(hash(value)), value)
+
+    def remove(cls, value):
+        COWDictMeta.__delitem__(cls, repr(hash(value)))
+
+    def __in__(cls, value):
+        return repr(hash(value)) in COWDictMeta
+
+    def iterkeys(cls):
+        raise TypeError("sets don't have keys")
+
+    def iteritems(cls):
+        raise TypeError("sets don't have 'items'")
+
+
+# These are the actual classes you use!
+class COWDictBase(metaclass=COWDictMeta):
+    __count__ = 0
+
+
+class COWSetBase(metaclass=COWSetMeta):
+    __count__ = 0

bitbake/lib/bb/__init__.py

@@ -0,0 +1,222 @@
+#
+# BitBake Build System Python Library
+#
+# Copyright (C) 2003  Holger Schurig
+# Copyright (C) 2003, 2004  Chris Larson
+#
+# Based on Gentoo's portage.py.
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+__version__ = "2.4.0"
+
+import sys
+if sys.version_info < (3, 8, 0):
+    raise RuntimeError("Sorry, python 3.8.0 or later is required for this version of bitbake")
+
+
+class BBHandledException(Exception):
+    """
+    The big dilemma for generic bitbake code is what information to give the user
+    when an exception occurs. Any exception inheriting this base exception class
+    has already provided information to the user via some 'fired' message type such as
+    an explicitly fired event using bb.fire, or a bb.error message. If bitbake
+    encounters an exception derived from this class, no backtrace or other information
+    will be given to the user, its assumed the earlier event provided the relevant information.
+    """
+    pass
+
+import os
+import logging
+
+
+class NullHandler(logging.Handler):
+    def emit(self, record):
+        pass
+
+class BBLoggerMixin(object):
+    def __init__(self, *args, **kwargs):
+        # Does nothing to allow calling super() from derived classes
+        pass
+
+    def setup_bblogger(self, name):
+        if name.split(".")[0] == "BitBake":
+            self.debug = self._debug_helper
+
+    def _debug_helper(self, *args, **kwargs):
+        return self.bbdebug(1, *args, **kwargs)
+
+    def debug2(self, *args, **kwargs):
+        return self.bbdebug(2, *args, **kwargs)
+
+    def debug3(self, *args, **kwargs):
+        return self.bbdebug(3, *args, **kwargs)
+
+    def bbdebug(self, level, msg, *args, **kwargs):
+        loglevel = logging.DEBUG - level + 1
+        if not bb.event.worker_pid:
+            if self.name in bb.msg.loggerDefaultDomains and loglevel > (bb.msg.loggerDefaultDomains[self.name]):
+                return
+            if loglevel < bb.msg.loggerDefaultLogLevel:
+                return
+
+        if not isinstance(level, int) or not isinstance(msg, str):
+            mainlogger.warning("Invalid arguments in bbdebug: %s" % repr((level, msg,) + args))
+
+        return self.log(loglevel, msg, *args, **kwargs)
+
+    def plain(self, msg, *args, **kwargs):
+        return self.log(logging.INFO + 1, msg, *args, **kwargs)
+
+    def verbose(self, msg, *args, **kwargs):
+        return self.log(logging.INFO - 1, msg, *args, **kwargs)
+
+    def verbnote(self, msg, *args, **kwargs):
+        return self.log(logging.INFO + 2, msg, *args, **kwargs)
+
+    def warnonce(self, msg, *args, **kwargs):
+        return self.log(logging.WARNING - 1, msg, *args, **kwargs)
+
+    def erroronce(self, msg, *args, **kwargs):
+        return self.log(logging.ERROR - 1, msg, *args, **kwargs)
+
+
+Logger = logging.getLoggerClass()
+class BBLogger(Logger, BBLoggerMixin):
+    def __init__(self, name, *args, **kwargs):
+        self.setup_bblogger(name)
+        super().__init__(name, *args, **kwargs)
+
+logging.raiseExceptions = False
+logging.setLoggerClass(BBLogger)
+
+class BBLoggerAdapter(logging.LoggerAdapter, BBLoggerMixin):
+    def __init__(self, logger, *args, **kwargs):
+        self.setup_bblogger(logger.name)
+        super().__init__(logger, *args, **kwargs)
+
+    if sys.version_info < (3, 6):
+        # These properties were added in Python 3.6. Add them in older versions
+        # for compatibility
+        @property
+        def manager(self):
+            return self.logger.manager
+
+        @manager.setter
+        def manager(self, value):
+            self.logger.manager = value
+
+        @property
+        def name(self):
+            return self.logger.name
+
+        def __repr__(self):
+            logger = self.logger
+            level = logger.getLevelName(logger.getEffectiveLevel())
+            return '<%s %s (%s)>' % (self.__class__.__name__, logger.name, level)
+
+logging.LoggerAdapter = BBLoggerAdapter
+
+logger = logging.getLogger("BitBake")
+logger.addHandler(NullHandler())
+logger.setLevel(logging.DEBUG - 2)
+
+mainlogger = logging.getLogger("BitBake.Main")
+
+class PrefixLoggerAdapter(logging.LoggerAdapter):
+    def __init__(self, prefix, logger):
+        super().__init__(logger, {})
+        self.__msg_prefix = prefix
+
+    def process(self, msg, kwargs):
+        return "%s%s" %(self.__msg_prefix, msg), kwargs
+
+# This has to be imported after the setLoggerClass, as the import of bb.msg
+# can result in construction of the various loggers.
+import bb.msg
+
+from bb import fetch2 as fetch
+sys.modules['bb.fetch'] = sys.modules['bb.fetch2']
+
+# Messaging convenience functions
+def plain(*args):
+    mainlogger.plain(''.join(args))
+
+def debug(lvl, *args):
+    if isinstance(lvl, str):
+        mainlogger.warning("Passed invalid debug level '%s' to bb.debug", lvl)
+        args = (lvl,) + args
+        lvl = 1
+    mainlogger.bbdebug(lvl, ''.join(args))
+
+def note(*args):
+    mainlogger.info(''.join(args))
+
+#
+# A higher prioity note which will show on the console but isn't a warning
+#
+# Something is happening the user should be aware of but they probably did
+# something to make it happen
+#
+def verbnote(*args):
+    mainlogger.verbnote(''.join(args))
+
+#
+# Warnings - things the user likely needs to pay attention to and fix
+#
+def warn(*args):
+    mainlogger.warning(''.join(args))
+
+def warnonce(*args):
+    mainlogger.warnonce(''.join(args))
+
+def error(*args, **kwargs):
+    mainlogger.error(''.join(args), extra=kwargs)
+
+def erroronce(*args):
+    mainlogger.erroronce(''.join(args))
+
+def fatal(*args, **kwargs):
+    mainlogger.critical(''.join(args), extra=kwargs)
+    raise BBHandledException()
+
+def deprecated(func, name=None, advice=""):
+    """This is a decorator which can be used to mark functions
+    as deprecated. It will result in a warning being emitted
+    when the function is used."""
+    import warnings
+
+    if advice:
+        advice = ": %s" % advice
+    if name is None:
+        name = func.__name__
+
+    def newFunc(*args, **kwargs):
+        warnings.warn("Call to deprecated function %s%s." % (name,
+                                                             advice),
+                      category=DeprecationWarning,
+                      stacklevel=2)
+        return func(*args, **kwargs)
+    newFunc.__name__ = func.__name__
+    newFunc.__doc__ = func.__doc__
+    newFunc.__dict__.update(func.__dict__)
+    return newFunc
+
+# For compatibility
+def deprecate_import(current, modulename, fromlist, renames = None):
+    """Import objects from one module into another, wrapping them with a DeprecationWarning"""
+    import sys
+
+    module = __import__(modulename, fromlist = fromlist)
+    for position, objname in enumerate(fromlist):
+        obj = getattr(module, objname)
+        newobj = deprecated(obj, "{0}.{1}".format(current, objname),
+                            "Please use {0}.{1} instead".format(modulename, objname))
+        if renames:
+            newname = renames[position]
+        else:
+            newname = objname
+
+        setattr(sys.modules[current], newname, newobj)
+

bitbake/lib/bb/asyncrpc/__init__.py

@@ -0,0 +1,33 @@
+#
+# Copyright BitBake Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import itertools
+import json
+
+# The Python async server defaults to a 64K receive buffer, so we hardcode our
+# maximum chunk size. It would be better if the client and server reported to
+# each other what the maximum chunk sizes were, but that will slow down the
+# connection setup with a round trip delay so I'd rather not do that unless it
+# is necessary
+DEFAULT_MAX_CHUNK = 32 * 1024
+
+
+def chunkify(msg, max_chunk):
+    if len(msg) < max_chunk - 1:
+        yield ''.join((msg, "\n"))
+    else:
+        yield ''.join((json.dumps({
+                'chunk-stream': None
+            }), "\n"))
+
+        args = [iter(msg)] * (max_chunk - 1)
+        for m in map(''.join, itertools.zip_longest(*args, fillvalue='')):
+            yield ''.join(itertools.chain(m, "\n"))
+        yield "\n"
+
+
+from .client import AsyncClient, Client
+from .serv import AsyncServer, AsyncServerConnection, ClientError, ServerError

bitbake/lib/bb/asyncrpc/client.py

@@ -0,0 +1,178 @@
+#
+# Copyright BitBake Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import abc
+import asyncio
+import json
+import os
+import socket
+import sys
+from . import chunkify, DEFAULT_MAX_CHUNK
+
+
+class AsyncClient(object):
+    def __init__(self, proto_name, proto_version, logger, timeout=30):
+        self.reader = None
+        self.writer = None
+        self.max_chunk = DEFAULT_MAX_CHUNK
+        self.proto_name = proto_name
+        self.proto_version = proto_version
+        self.logger = logger
+        self.timeout = timeout
+
+    async def connect_tcp(self, address, port):
+        async def connect_sock():
+            return await asyncio.open_connection(address, port)
+
+        self._connect_sock = connect_sock
+
+    async def connect_unix(self, path):
+        async def connect_sock():
+            # AF_UNIX has path length issues so chdir here to workaround
+            cwd = os.getcwd()
+            try:
+                os.chdir(os.path.dirname(path))
+                # The socket must be opened synchronously so that CWD doesn't get
+                # changed out from underneath us so we pass as a sock into asyncio
+                sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM, 0)
+                sock.connect(os.path.basename(path))
+            finally:
+               os.chdir(cwd)
+            return await asyncio.open_unix_connection(sock=sock)
+
+        self._connect_sock = connect_sock
+
+    async def setup_connection(self):
+        s = '%s %s\n\n' % (self.proto_name, self.proto_version)
+        self.writer.write(s.encode("utf-8"))
+        await self.writer.drain()
+
+    async def connect(self):
+        if self.reader is None or self.writer is None:
+            (self.reader, self.writer) = await self._connect_sock()
+            await self.setup_connection()
+
+    async def close(self):
+        self.reader = None
+
+        if self.writer is not None:
+            self.writer.close()
+            self.writer = None
+
+    async def _send_wrapper(self, proc):
+        count = 0
+        while True:
+            try:
+                await self.connect()
+                return await proc()
+            except (
+                OSError,
+                ConnectionError,
+                json.JSONDecodeError,
+                UnicodeDecodeError,
+            ) as e:
+                self.logger.warning("Error talking to server: %s" % e)
+                if count >= 3:
+                    if not isinstance(e, ConnectionError):
+                        raise ConnectionError(str(e))
+                    raise e
+                await self.close()
+                count += 1
+
+    async def send_message(self, msg):
+        async def get_line():
+            try:
+                line = await asyncio.wait_for(self.reader.readline(), self.timeout)
+            except asyncio.TimeoutError:
+                raise ConnectionError("Timed out waiting for server")
+
+            if not line:
+                raise ConnectionError("Connection closed")
+
+            line = line.decode("utf-8")
+
+            if not line.endswith("\n"):
+                raise ConnectionError("Bad message %r" % (line))
+
+            return line
+
+        async def proc():
+            for c in chunkify(json.dumps(msg), self.max_chunk):
+                self.writer.write(c.encode("utf-8"))
+            await self.writer.drain()
+
+            l = await get_line()
+
+            m = json.loads(l)
+            if m and "chunk-stream" in m:
+                lines = []
+                while True:
+                    l = (await get_line()).rstrip("\n")
+                    if not l:
+                        break
+                    lines.append(l)
+
+                m = json.loads("".join(lines))
+
+            return m
+
+        return await self._send_wrapper(proc)
+
+    async def ping(self):
+        return await self.send_message(
+            {'ping': {}}
+        )
+
+
+class Client(object):
+    def __init__(self):
+        self.client = self._get_async_client()
+        self.loop = asyncio.new_event_loop()
+
+        # Override any pre-existing loop.
+        # Without this, the PR server export selftest triggers a hang
+        # when running with Python 3.7.  The drawback is that there is
+        # potential for issues if the PR and hash equiv (or some new)
+        # clients need to both be instantiated in the same process.
+        # This should be revisited if/when Python 3.9 becomes the
+        # minimum required version for BitBake, as it seems not
+        # required (but harmless) with it.
+        asyncio.set_event_loop(self.loop)
+
+        self._add_methods('connect_tcp', 'ping')
+
+    @abc.abstractmethod
+    def _get_async_client(self):
+        pass
+
+    def _get_downcall_wrapper(self, downcall):
+        def wrapper(*args, **kwargs):
+            return self.loop.run_until_complete(downcall(*args, **kwargs))
+
+        return wrapper
+
+    def _add_methods(self, *methods):
+        for m in methods:
+            downcall = getattr(self.client, m)
+            setattr(self, m, self._get_downcall_wrapper(downcall))
+
+    def connect_unix(self, path):
+        self.loop.run_until_complete(self.client.connect_unix(path))
+        self.loop.run_until_complete(self.client.connect())
+
+    @property
+    def max_chunk(self):
+        return self.client.max_chunk
+
+    @max_chunk.setter
+    def max_chunk(self, value):
+        self.client.max_chunk = value
+
+    def close(self):
+        self.loop.run_until_complete(self.client.close())
+        if sys.version_info >= (3, 6):
+            self.loop.run_until_complete(self.loop.shutdown_asyncgens())
+        self.loop.close()

bitbake/lib/bb/asyncrpc/serv.py

@@ -0,0 +1,295 @@
+#
+# Copyright BitBake Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import abc
+import asyncio
+import json
+import os
+import signal
+import socket
+import sys
+import multiprocessing
+from . import chunkify, DEFAULT_MAX_CHUNK
+
+
+class ClientError(Exception):
+    pass
+
+
+class ServerError(Exception):
+    pass
+
+
+class AsyncServerConnection(object):
+    def __init__(self, reader, writer, proto_name, logger):
+        self.reader = reader
+        self.writer = writer
+        self.proto_name = proto_name
+        self.max_chunk = DEFAULT_MAX_CHUNK
+        self.handlers = {
+            'chunk-stream': self.handle_chunk,
+            'ping': self.handle_ping,
+        }
+        self.logger = logger
+
+    async def process_requests(self):
+        try:
+            self.addr = self.writer.get_extra_info('peername')
+            self.logger.debug('Client %r connected' % (self.addr,))
+
+            # Read protocol and version
+            client_protocol = await self.reader.readline()
+            if not client_protocol:
+                return
+
+            (client_proto_name, client_proto_version) = client_protocol.decode('utf-8').rstrip().split()
+            if client_proto_name != self.proto_name:
+                self.logger.debug('Rejecting invalid protocol %s' % (self.proto_name))
+                return
+
+            self.proto_version = tuple(int(v) for v in client_proto_version.split('.'))
+            if not self.validate_proto_version():
+                self.logger.debug('Rejecting invalid protocol version %s' % (client_proto_version))
+                return
+
+            # Read headers. Currently, no headers are implemented, so look for
+            # an empty line to signal the end of the headers
+            while True:
+                line = await self.reader.readline()
+                if not line:
+                    return
+
+                line = line.decode('utf-8').rstrip()
+                if not line:
+                    break
+
+            # Handle messages
+            while True:
+                d = await self.read_message()
+                if d is None:
+                    break
+                await self.dispatch_message(d)
+                await self.writer.drain()
+        except ClientError as e:
+            self.logger.error(str(e))
+        finally:
+            self.writer.close()
+
+    async def dispatch_message(self, msg):
+        for k in self.handlers.keys():
+            if k in msg:
+                self.logger.debug('Handling %s' % k)
+                await self.handlers[k](msg[k])
+                return
+
+        raise ClientError("Unrecognized command %r" % msg)
+
+    def write_message(self, msg):
+        for c in chunkify(json.dumps(msg), self.max_chunk):
+            self.writer.write(c.encode('utf-8'))
+
+    async def read_message(self):
+        l = await self.reader.readline()
+        if not l:
+            return None
+
+        try:
+            message = l.decode('utf-8')
+
+            if not message.endswith('\n'):
+                return None
+
+            return json.loads(message)
+        except (json.JSONDecodeError, UnicodeDecodeError) as e:
+            self.logger.error('Bad message from client: %r' % message)
+            raise e
+
+    async def handle_chunk(self, request):
+        lines = []
+        try:
+            while True:
+                l = await self.reader.readline()
+                l = l.rstrip(b"\n").decode("utf-8")
+                if not l:
+                    break
+                lines.append(l)
+
+            msg = json.loads(''.join(lines))
+        except (json.JSONDecodeError, UnicodeDecodeError) as e:
+            self.logger.error('Bad message from client: %r' % lines)
+            raise e
+
+        if 'chunk-stream' in msg:
+            raise ClientError("Nested chunks are not allowed")
+
+        await self.dispatch_message(msg)
+
+    async def handle_ping(self, request):
+        response = {'alive': True}
+        self.write_message(response)
+
+
+class AsyncServer(object):
+    def __init__(self, logger):
+        self._cleanup_socket = None
+        self.logger = logger
+        self.start = None
+        self.address = None
+        self.loop = None
+
+    def start_tcp_server(self, host, port):
+        def start_tcp():
+            self.server = self.loop.run_until_complete(
+                asyncio.start_server(self.handle_client, host, port)
+            )
+
+            for s in self.server.sockets:
+                self.logger.debug('Listening on %r' % (s.getsockname(),))
+                # Newer python does this automatically. Do it manually here for
+                # maximum compatibility
+                s.setsockopt(socket.SOL_TCP, socket.TCP_NODELAY, 1)
+                s.setsockopt(socket.SOL_TCP, socket.TCP_QUICKACK, 1)
+
+                # Enable keep alives. This prevents broken client connections
+                # from persisting on the server for long periods of time.
+                s.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
+                s.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPIDLE, 30)
+                s.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPINTVL, 15)
+                s.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPCNT, 4)
+
+            name = self.server.sockets[0].getsockname()
+            if self.server.sockets[0].family == socket.AF_INET6:
+                self.address = "[%s]:%d" % (name[0], name[1])
+            else:
+                self.address = "%s:%d" % (name[0], name[1])
+
+        self.start = start_tcp
+
+    def start_unix_server(self, path):
+        def cleanup():
+            os.unlink(path)
+
+        def start_unix():
+            cwd = os.getcwd()
+            try:
+                # Work around path length limits in AF_UNIX
+                os.chdir(os.path.dirname(path))
+                self.server = self.loop.run_until_complete(
+                    asyncio.start_unix_server(self.handle_client, os.path.basename(path))
+                )
+            finally:
+                os.chdir(cwd)
+
+            self.logger.debug('Listening on %r' % path)
+
+            self._cleanup_socket = cleanup
+            self.address = "unix://%s" % os.path.abspath(path)
+
+        self.start = start_unix
+
+    @abc.abstractmethod
+    def accept_client(self, reader, writer):
+        pass
+
+    async def handle_client(self, reader, writer):
+        # writer.transport.set_write_buffer_limits(0)
+        try:
+            client = self.accept_client(reader, writer)
+            await client.process_requests()
+        except Exception as e:
+            import traceback
+            self.logger.error('Error from client: %s' % str(e), exc_info=True)
+            traceback.print_exc()
+            writer.close()
+        self.logger.debug('Client disconnected')
+
+    def run_loop_forever(self):
+        try:
+            self.loop.run_forever()
+        except KeyboardInterrupt:
+            pass
+
+    def signal_handler(self):
+        self.logger.debug("Got exit signal")
+        self.loop.stop()
+
+    def _serve_forever(self):
+        try:
+            self.loop.add_signal_handler(signal.SIGTERM, self.signal_handler)
+            signal.pthread_sigmask(signal.SIG_UNBLOCK, [signal.SIGTERM])
+
+            self.run_loop_forever()
+            self.server.close()
+
+            self.loop.run_until_complete(self.server.wait_closed())
+            self.logger.debug('Server shutting down')
+        finally:
+            if self._cleanup_socket is not None:
+                self._cleanup_socket()
+
+    def serve_forever(self):
+        """
+        Serve requests in the current process
+        """
+        # Create loop and override any loop that may have existed in
+        # a parent process.  It is possible that the usecases of
+        # serve_forever might be constrained enough to allow using
+        # get_event_loop here, but better safe than sorry for now.
+        self.loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(self.loop)
+        self.start()
+        self._serve_forever()
+
+    def serve_as_process(self, *, prefunc=None, args=()):
+        """
+        Serve requests in a child process
+        """
+        def run(queue):
+            # Create loop and override any loop that may have existed
+            # in a parent process.  Without doing this and instead
+            # using get_event_loop, at the very minimum the hashserv
+            # unit tests will hang when running the second test.
+            # This happens since get_event_loop in the spawned server
+            # process for the second testcase ends up with the loop
+            # from the hashserv client created in the unit test process
+            # when running the first testcase.  The problem is somewhat
+            # more general, though, as any potential use of asyncio in
+            # Cooker could create a loop that needs to replaced in this
+            # new process.
+            self.loop = asyncio.new_event_loop()
+            asyncio.set_event_loop(self.loop)
+            try:
+                self.start()
+            finally:
+                queue.put(self.address)
+                queue.close()
+
+            if prefunc is not None:
+                prefunc(self, *args)
+
+            self._serve_forever()
+
+            if sys.version_info >= (3, 6):
+                self.loop.run_until_complete(self.loop.shutdown_asyncgens())
+            self.loop.close()
+
+        queue = multiprocessing.Queue()
+
+        # Temporarily block SIGTERM. The server process will inherit this
+        # block which will ensure it doesn't receive the SIGTERM until the
+        # handler is ready for it
+        mask = signal.pthread_sigmask(signal.SIG_BLOCK, [signal.SIGTERM])
+        try:
+            self.process = multiprocessing.Process(target=run, args=(queue,))
+            self.process.start()
+
+            self.address = queue.get()
+            queue.close()
+            queue.join_thread()
+
+            return self.process
+        finally:
+            signal.pthread_sigmask(signal.SIG_SETMASK, mask)

bitbake/lib/bb/cache.py

@@ -0,0 +1,999 @@
+#
+# BitBake Cache implementation
+#
+# Caching of bitbake variables before task execution
+
+# Copyright (C) 2006        Richard Purdie
+# Copyright (C) 2012        Intel Corporation
+
+# but small sections based on code from bin/bitbake:
+# Copyright (C) 2003, 2004  Chris Larson
+# Copyright (C) 2003, 2004  Phil Blundell
+# Copyright (C) 2003 - 2005 Michael 'Mickey' Lauer
+# Copyright (C) 2005        Holger Hans Peter Freyther
+# Copyright (C) 2005        ROAD GmbH
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import os
+import logging
+import pickle
+from collections import defaultdict
+from collections.abc import Mapping
+import bb.utils
+from bb import PrefixLoggerAdapter
+import re
+import shutil
+
+logger = logging.getLogger("BitBake.Cache")
+
+__cache_version__ = "155"
+
+def getCacheFile(path, filename, mc, data_hash):
+    mcspec = ''
+    if mc:
+        mcspec = ".%s" % mc
+    return os.path.join(path, filename + mcspec + "." + data_hash)
+
+# RecipeInfoCommon defines common data retrieving methods
+# from meta data for caches. CoreRecipeInfo as well as other
+# Extra RecipeInfo needs to inherit this class
+class RecipeInfoCommon(object):
+
+    @classmethod
+    def listvar(cls, var, metadata):
+        return cls.getvar(var, metadata).split()
+
+    @classmethod
+    def intvar(cls, var, metadata):
+        return int(cls.getvar(var, metadata) or 0)
+
+    @classmethod
+    def depvar(cls, var, metadata):
+        return bb.utils.explode_deps(cls.getvar(var, metadata))
+
+    @classmethod
+    def pkgvar(cls, var, packages, metadata):
+        return dict((pkg, cls.depvar("%s:%s" % (var, pkg), metadata))
+                    for pkg in packages)
+
+    @classmethod
+    def taskvar(cls, var, tasks, metadata):
+        return dict((task, cls.getvar("%s:task-%s" % (var, task), metadata))
+                    for task in tasks)
+
+    @classmethod
+    def flaglist(cls, flag, varlist, metadata, squash=False):
+        out_dict = dict((var, metadata.getVarFlag(var, flag))
+                    for var in varlist)
+        if squash:
+            return dict((k,v) for (k,v) in out_dict.items() if v)
+        else:
+            return out_dict
+
+    @classmethod
+    def getvar(cls, var, metadata, expand = True):
+        return metadata.getVar(var, expand) or ''
+
+
+class CoreRecipeInfo(RecipeInfoCommon):
+    __slots__ = ()
+
+    cachefile = "bb_cache.dat"
+
+    def __init__(self, filename, metadata):
+        self.file_depends = metadata.getVar('__depends', False)
+        self.timestamp = bb.parse.cached_mtime(filename)
+        self.variants = self.listvar('__VARIANTS', metadata) + ['']
+        self.appends = self.listvar('__BBAPPEND', metadata)
+        self.nocache = self.getvar('BB_DONT_CACHE', metadata)
+
+        self.provides  = self.depvar('PROVIDES', metadata)
+        self.rprovides = self.depvar('RPROVIDES', metadata)
+        self.pn = self.getvar('PN', metadata) or bb.parse.vars_from_file(filename,metadata)[0]
+        self.packages = self.listvar('PACKAGES', metadata)
+        if not self.packages:
+            self.packages.append(self.pn)
+        self.packages_dynamic = self.listvar('PACKAGES_DYNAMIC', metadata)
+        self.rprovides_pkg = self.pkgvar('RPROVIDES', self.packages, metadata)
+
+        self.skipreason = self.getvar('__SKIPPED', metadata)
+        if self.skipreason:
+            self.skipped = True
+            return
+
+        self.tasks = metadata.getVar('__BBTASKS', False)
+
+        self.basetaskhashes = metadata.getVar('__siggen_basehashes', False) or {}
+        self.hashfilename = self.getvar('BB_HASHFILENAME', metadata)
+
+        self.task_deps = metadata.getVar('_task_deps', False) or {'tasks': [], 'parents': {}}
+
+        self.skipped = False
+        self.pe = self.getvar('PE', metadata)
+        self.pv = self.getvar('PV', metadata)
+        self.pr = self.getvar('PR', metadata)
+        self.defaultpref = self.intvar('DEFAULT_PREFERENCE', metadata)
+        self.not_world = self.getvar('EXCLUDE_FROM_WORLD', metadata)
+        self.stamp = self.getvar('STAMP', metadata)
+        self.stampclean = self.getvar('STAMPCLEAN', metadata)
+        self.stamp_extrainfo = self.flaglist('stamp-extra-info', self.tasks, metadata)
+        self.file_checksums = self.flaglist('file-checksums', self.tasks, metadata, True)
+        self.depends          = self.depvar('DEPENDS', metadata)
+        self.rdepends         = self.depvar('RDEPENDS', metadata)
+        self.rrecommends      = self.depvar('RRECOMMENDS', metadata)
+        self.rdepends_pkg     = self.pkgvar('RDEPENDS', self.packages, metadata)
+        self.rrecommends_pkg  = self.pkgvar('RRECOMMENDS', self.packages, metadata)
+        self.inherits         = self.getvar('__inherit_cache', metadata, expand=False)
+        self.fakerootenv      = self.getvar('FAKEROOTENV', metadata)
+        self.fakerootdirs     = self.getvar('FAKEROOTDIRS', metadata)
+        self.fakerootlogs     = self.getvar('FAKEROOTLOGS', metadata)
+        self.fakerootnoenv    = self.getvar('FAKEROOTNOENV', metadata)
+        self.extradepsfunc    = self.getvar('calculate_extra_depends', metadata)
+
+    @classmethod
+    def init_cacheData(cls, cachedata):
+        # CacheData in Core RecipeInfo Class
+        cachedata.task_deps = {}
+        cachedata.pkg_fn = {}
+        cachedata.pkg_pn = defaultdict(list)
+        cachedata.pkg_pepvpr = {}
+        cachedata.pkg_dp = {}
+
+        cachedata.stamp = {}
+        cachedata.stampclean = {}
+        cachedata.stamp_extrainfo = {}
+        cachedata.file_checksums = {}
+        cachedata.fn_provides = {}
+        cachedata.pn_provides = defaultdict(list)
+        cachedata.all_depends = []
+
+        cachedata.deps = defaultdict(list)
+        cachedata.packages = defaultdict(list)
+        cachedata.providers = defaultdict(list)
+        cachedata.rproviders = defaultdict(list)
+        cachedata.packages_dynamic = defaultdict(list)
+
+        cachedata.rundeps = defaultdict(lambda: defaultdict(list))
+        cachedata.runrecs = defaultdict(lambda: defaultdict(list))
+        cachedata.possible_world = []
+        cachedata.universe_target = []
+        cachedata.hashfn = {}
+
+        cachedata.basetaskhash = {}
+        cachedata.inherits = {}
+        cachedata.fakerootenv = {}
+        cachedata.fakerootnoenv = {}
+        cachedata.fakerootdirs = {}
+        cachedata.fakerootlogs = {}
+        cachedata.extradepsfunc = {}
+
+    def add_cacheData(self, cachedata, fn):
+        cachedata.task_deps[fn] = self.task_deps
+        cachedata.pkg_fn[fn] = self.pn
+        cachedata.pkg_pn[self.pn].append(fn)
+        cachedata.pkg_pepvpr[fn] = (self.pe, self.pv, self.pr)
+        cachedata.pkg_dp[fn] = self.defaultpref
+        cachedata.stamp[fn] = self.stamp
+        cachedata.stampclean[fn] = self.stampclean
+        cachedata.stamp_extrainfo[fn] = self.stamp_extrainfo
+        cachedata.file_checksums[fn] = self.file_checksums
+
+        provides = [self.pn]
+        for provide in self.provides:
+            if provide not in provides:
+                provides.append(provide)
+        cachedata.fn_provides[fn] = provides
+
+        for provide in provides:
+            cachedata.providers[provide].append(fn)
+            if provide not in cachedata.pn_provides[self.pn]:
+                cachedata.pn_provides[self.pn].append(provide)
+
+        for dep in self.depends:
+            if dep not in cachedata.deps[fn]:
+                cachedata.deps[fn].append(dep)
+            if dep not in cachedata.all_depends:
+                cachedata.all_depends.append(dep)
+
+        rprovides = self.rprovides
+        for package in self.packages:
+            cachedata.packages[package].append(fn)
+            rprovides += self.rprovides_pkg[package]
+
+        for rprovide in rprovides:
+            if fn not in cachedata.rproviders[rprovide]:
+                cachedata.rproviders[rprovide].append(fn)
+
+        for package in self.packages_dynamic:
+            cachedata.packages_dynamic[package].append(fn)
+
+        # Build hash of runtime depends and recommends
+        for package in self.packages:
+            cachedata.rundeps[fn][package] = list(self.rdepends) + self.rdepends_pkg[package]
+            cachedata.runrecs[fn][package] = list(self.rrecommends) + self.rrecommends_pkg[package]
+
+        # Collect files we may need for possible world-dep
+        # calculations
+        if not bb.utils.to_boolean(self.not_world):
+            cachedata.possible_world.append(fn)
+        #else:
+        #    logger.debug2("EXCLUDE FROM WORLD: %s", fn)
+
+        # create a collection of all targets for sanity checking
+        # tasks, such as upstream versions, license, and tools for
+        # task and image creation.
+        cachedata.universe_target.append(self.pn)
+
+        cachedata.hashfn[fn] = self.hashfilename
+        for task, taskhash in self.basetaskhashes.items():
+            identifier = '%s:%s' % (fn, task)
+            cachedata.basetaskhash[identifier] = taskhash
+
+        cachedata.inherits[fn] = self.inherits
+        cachedata.fakerootenv[fn] = self.fakerootenv
+        cachedata.fakerootnoenv[fn] = self.fakerootnoenv
+        cachedata.fakerootdirs[fn] = self.fakerootdirs
+        cachedata.fakerootlogs[fn] = self.fakerootlogs
+        cachedata.extradepsfunc[fn] = self.extradepsfunc
+
+
+class SiggenRecipeInfo(RecipeInfoCommon):
+    __slots__ = ()
+
+    classname = "SiggenRecipeInfo"
+    cachefile = "bb_cache_" + classname +".dat"
+    # we don't want to show this information in graph files so don't set cachefields
+    #cachefields = []
+
+    def __init__(self, filename, metadata):
+        self.siggen_gendeps = metadata.getVar("__siggen_gendeps", False)
+        self.siggen_varvals = metadata.getVar("__siggen_varvals", False)
+        self.siggen_taskdeps = metadata.getVar("__siggen_taskdeps", False)
+
+    @classmethod
+    def init_cacheData(cls, cachedata):
+        cachedata.siggen_taskdeps = {}
+        cachedata.siggen_gendeps = {}
+        cachedata.siggen_varvals = {}
+
+    def add_cacheData(self, cachedata, fn):
+        cachedata.siggen_gendeps[fn] = self.siggen_gendeps
+        cachedata.siggen_varvals[fn] = self.siggen_varvals
+        cachedata.siggen_taskdeps[fn] = self.siggen_taskdeps
+
+    # The siggen variable data is large and impacts:
+    #  - bitbake's overall memory usage
+    #  - the amount of data sent over IPC between parsing processes and the server
+    #  - the size of the cache files on disk
+    #  - the size of "sigdata" hash information files on disk
+    # The data consists of strings (some large) or frozenset lists of variables
+    # As such, we a) deplicate the data here and b) pass references to the object at second
+    # access (e.g. over IPC or saving into pickle).
+
+    store = {}
+    save_map = {}
+    save_count = 1
+    restore_map = {}
+    restore_count = {}
+
+    @classmethod
+    def reset(cls):
+        # Needs to be called before starting new streamed data in a given process 
+        # (e.g. writing out the cache again)
+        cls.save_map = {}
+        cls.save_count = 1
+        cls.restore_map = {}
+
+    @classmethod
+    def _save(cls, deps):
+        ret = []
+        if not deps:
+            return deps
+        for dep in deps:
+            fs = deps[dep]
+            if fs is None:
+                ret.append((dep, None, None))
+            elif fs in cls.save_map:
+                ret.append((dep, None, cls.save_map[fs]))
+            else:
+                cls.save_map[fs] = cls.save_count
+                ret.append((dep, fs, cls.save_count))
+                cls.save_count = cls.save_count + 1
+        return ret
+
+    @classmethod
+    def _restore(cls, deps, pid):
+        ret = {}
+        if not deps:
+            return deps
+        if pid not in cls.restore_map:
+            cls.restore_map[pid] = {}
+        map = cls.restore_map[pid]
+        for dep, fs, mapnum in deps:
+            if fs is None and mapnum is None:
+                ret[dep] = None
+            elif fs is None:
+                ret[dep] = map[mapnum]
+            else:
+                try:
+                    fs = cls.store[fs]
+                except KeyError:
+                    cls.store[fs] = fs
+                map[mapnum] = fs
+                ret[dep] = fs
+        return ret
+
+    def __getstate__(self):
+        ret = {}
+        for key in ["siggen_gendeps", "siggen_taskdeps", "siggen_varvals"]:
+            ret[key] = self._save(self.__dict__[key])
+        ret['pid'] = os.getpid()
+        return ret
+
+    def __setstate__(self, state):
+        pid = state['pid']
+        for key in ["siggen_gendeps", "siggen_taskdeps", "siggen_varvals"]:
+            setattr(self, key, self._restore(state[key], pid))
+
+
+def virtualfn2realfn(virtualfn):
+    """
+    Convert a virtual file name to a real one + the associated subclass keyword
+    """
+    mc = ""
+    if virtualfn.startswith('mc:') and virtualfn.count(':') >= 2:
+        elems = virtualfn.split(':')
+        mc = elems[1]
+        virtualfn = ":".join(elems[2:])
+
+    fn = virtualfn
+    cls = ""
+    if virtualfn.startswith('virtual:'):
+        elems = virtualfn.split(':')
+        cls = ":".join(elems[1:-1])
+        fn = elems[-1]
+
+    return (fn, cls, mc)
+
+def realfn2virtual(realfn, cls, mc):
+    """
+    Convert a real filename + the associated subclass keyword to a virtual filename
+    """
+    if cls:
+        realfn = "virtual:" + cls + ":" + realfn
+    if mc:
+        realfn = "mc:" + mc + ":" + realfn
+    return realfn
+
+def variant2virtual(realfn, variant):
+    """
+    Convert a real filename + the associated subclass keyword to a virtual filename
+    """
+    if variant == "":
+        return realfn
+    if variant.startswith("mc:") and variant.count(':') >= 2:
+        elems = variant.split(":")
+        if elems[2]:
+            return "mc:" + elems[1] + ":virtual:" + ":".join(elems[2:]) + ":" + realfn
+        return "mc:" + elems[1] + ":" + realfn
+    return "virtual:" + variant + ":" + realfn
+
+#
+# Cooker calls cacheValid on its recipe list, then either calls loadCached
+# from it's main thread or parse from separate processes to generate an up to
+# date cache
+#
+class Cache(object):
+    """
+    BitBake Cache implementation
+    """
+    def __init__(self, databuilder, mc, data_hash, caches_array):
+        self.databuilder = databuilder
+        self.data = databuilder.data
+
+        # Pass caches_array information into Cache Constructor
+        # It will be used later for deciding whether we
+        # need extra cache file dump/load support
+        self.mc = mc
+        self.logger = PrefixLoggerAdapter("Cache: %s: " % (mc if mc else "default"), logger)
+        self.caches_array = caches_array
+        self.cachedir = self.data.getVar("CACHE")
+        self.clean = set()
+        self.checked = set()
+        self.depends_cache = {}
+        self.data_fn = None
+        self.cacheclean = True
+        self.data_hash = data_hash
+        self.filelist_regex = re.compile(r'(?:(?<=:True)|(?<=:False))\s+')
+
+        if self.cachedir in [None, '']:
+            bb.fatal("Please ensure CACHE is set to the cache directory for BitBake to use")
+
+    def getCacheFile(self, cachefile):
+        return getCacheFile(self.cachedir, cachefile, self.mc, self.data_hash)
+
+    def prepare_cache(self, progress):
+        loaded = 0
+
+        self.cachefile = self.getCacheFile("bb_cache.dat")
+
+        self.logger.debug("Cache dir: %s", self.cachedir)
+        bb.utils.mkdirhier(self.cachedir)
+
+        cache_ok = True
+        if self.caches_array:
+            for cache_class in self.caches_array:
+                cachefile = self.getCacheFile(cache_class.cachefile)
+                cache_exists = os.path.exists(cachefile)
+                self.logger.debug2("Checking if %s exists: %r", cachefile, cache_exists)
+                cache_ok = cache_ok and cache_exists
+                cache_class.init_cacheData(self)
+        if cache_ok:
+            loaded = self.load_cachefile(progress)
+        elif os.path.isfile(self.cachefile):
+            self.logger.info("Out of date cache found, rebuilding...")
+        else:
+            self.logger.debug("Cache file %s not found, building..." % self.cachefile)
+
+        # We don't use the symlink, its just for debugging convinience
+        if self.mc:
+            symlink = os.path.join(self.cachedir, "bb_cache.dat.%s" % self.mc)
+        else:
+            symlink = os.path.join(self.cachedir, "bb_cache.dat")
+
+        if os.path.exists(symlink):
+            bb.utils.remove(symlink)
+        try:
+            os.symlink(os.path.basename(self.cachefile), symlink)
+        except OSError:
+            pass
+
+        return loaded
+
+    def cachesize(self):
+        cachesize = 0
+        for cache_class in self.caches_array:
+            cachefile = self.getCacheFile(cache_class.cachefile)
+            try:
+                with open(cachefile, "rb") as cachefile:
+                    cachesize += os.fstat(cachefile.fileno()).st_size
+            except FileNotFoundError:
+                pass
+
+        return cachesize
+
+    def load_cachefile(self, progress):
+        previous_progress = 0
+
+        for cache_class in self.caches_array:
+            cachefile = self.getCacheFile(cache_class.cachefile)
+            self.logger.debug('Loading cache file: %s' % cachefile)
+            with open(cachefile, "rb") as cachefile:
+                pickled = pickle.Unpickler(cachefile)
+                # Check cache version information
+                try:
+                    cache_ver = pickled.load()
+                    bitbake_ver = pickled.load()
+                except Exception:
+                    self.logger.info('Invalid cache, rebuilding...')
+                    return 0
+
+                if cache_ver != __cache_version__:
+                    self.logger.info('Cache version mismatch, rebuilding...')
+                    return 0
+                elif bitbake_ver != bb.__version__:
+                    self.logger.info('Bitbake version mismatch, rebuilding...')
+                    return 0
+
+                # Load the rest of the cache file
+                current_progress = 0
+                while cachefile:
+                    try:
+                        key = pickled.load()
+                        value = pickled.load()
+                    except Exception:
+                        break
+                    if not isinstance(key, str):
+                        bb.warn("%s from extras cache is not a string?" % key)
+                        break
+                    if not isinstance(value, RecipeInfoCommon):
+                        bb.warn("%s from extras cache is not a RecipeInfoCommon class?" % value)
+                        break
+
+                    if key in self.depends_cache:
+                        self.depends_cache[key].append(value)
+                    else:
+                        self.depends_cache[key] = [value]
+                    # only fire events on even percentage boundaries
+                    current_progress = cachefile.tell() + previous_progress
+                    progress(cachefile.tell() + previous_progress)
+
+                previous_progress += current_progress
+
+        return len(self.depends_cache)
+
+    def parse(self, filename, appends):
+        """Parse the specified filename, returning the recipe information"""
+        self.logger.debug("Parsing %s", filename)
+        infos = []
+        datastores = self.databuilder.parseRecipeVariants(filename, appends, mc=self.mc)
+        depends = []
+        variants = []
+        # Process the "real" fn last so we can store variants list
+        for variant, data in sorted(datastores.items(),
+                                    key=lambda i: i[0],
+                                    reverse=True):
+            virtualfn = variant2virtual(filename, variant)
+            variants.append(variant)
+            depends = depends + (data.getVar("__depends", False) or [])
+            if depends and not variant:
+                data.setVar("__depends", depends)
+            if virtualfn == filename:
+                data.setVar("__VARIANTS", " ".join(variants))
+            info_array = []
+            for cache_class in self.caches_array:
+                info = cache_class(filename, data)
+                info_array.append(info)
+            infos.append((virtualfn, info_array))
+
+        return infos
+
+    def loadCached(self, filename, appends):
+        """Obtain the recipe information for the specified filename,
+        using cached values.
+        """
+
+        infos = []
+        # info_array item is a list of [CoreRecipeInfo, XXXRecipeInfo]
+        info_array = self.depends_cache[filename]
+        for variant in info_array[0].variants:
+            virtualfn = variant2virtual(filename, variant)
+            infos.append((virtualfn, self.depends_cache[virtualfn]))
+
+        return infos
+
+    def cacheValid(self, fn, appends):
+        """
+        Is the cache valid for fn?
+        Fast version, no timestamps checked.
+        """
+        if fn not in self.checked:
+            self.cacheValidUpdate(fn, appends)
+        if fn in self.clean:
+            return True
+        return False
+
+    def cacheValidUpdate(self, fn, appends):
+        """
+        Is the cache valid for fn?
+        Make thorough (slower) checks including timestamps.
+        """
+        self.checked.add(fn)
+
+        # File isn't in depends_cache
+        if not fn in self.depends_cache:
+            self.logger.debug2("%s is not cached", fn)
+            return False
+
+        mtime = bb.parse.cached_mtime_noerror(fn)
+
+        # Check file still exists
+        if mtime == 0:
+            self.logger.debug2("%s no longer exists", fn)
+            self.remove(fn)
+            return False
+
+        info_array = self.depends_cache[fn]
+        # Check the file's timestamp
+        if mtime != info_array[0].timestamp:
+            self.logger.debug2("%s changed", fn)
+            self.remove(fn)
+            return False
+
+        # Check dependencies are still valid
+        depends = info_array[0].file_depends
+        if depends:
+            for f, old_mtime in depends:
+                fmtime = bb.parse.cached_mtime_noerror(f)
+                # Check if file still exists
+                if old_mtime != 0 and fmtime == 0:
+                    self.logger.debug2("%s's dependency %s was removed",
+                                         fn, f)
+                    self.remove(fn)
+                    return False
+
+                if (fmtime != old_mtime):
+                    self.logger.debug2("%s's dependency %s changed",
+                                         fn, f)
+                    self.remove(fn)
+                    return False
+
+        if hasattr(info_array[0], 'file_checksums'):
+            for _, fl in info_array[0].file_checksums.items():
+                fl = fl.strip()
+                if not fl:
+                    continue
+                # Have to be careful about spaces and colons in filenames
+                flist = self.filelist_regex.split(fl)
+                for f in flist:
+                    if not f:
+                        continue
+                    f, exist = f.rsplit(":", 1)
+                    if (exist == "True" and not os.path.exists(f)) or (exist == "False" and os.path.exists(f)):
+                        self.logger.debug2("%s's file checksum list file %s changed",
+                                             fn, f)
+                        self.remove(fn)
+                        return False
+
+        if tuple(appends) != tuple(info_array[0].appends):
+            self.logger.debug2("appends for %s changed", fn)
+            self.logger.debug2("%s to %s" % (str(appends), str(info_array[0].appends)))
+            self.remove(fn)
+            return False
+
+        invalid = False
+        for cls in info_array[0].variants:
+            virtualfn = variant2virtual(fn, cls)
+            self.clean.add(virtualfn)
+            if virtualfn not in self.depends_cache:
+                self.logger.debug2("%s is not cached", virtualfn)
+                invalid = True
+            elif len(self.depends_cache[virtualfn]) != len(self.caches_array):
+                self.logger.debug2("Extra caches missing for %s?" % virtualfn)
+                invalid = True
+
+        # If any one of the variants is not present, mark as invalid for all
+        if invalid:
+            for cls in info_array[0].variants:
+                virtualfn = variant2virtual(fn, cls)
+                if virtualfn in self.clean:
+                    self.logger.debug2("Removing %s from cache", virtualfn)
+                    self.clean.remove(virtualfn)
+            if fn in self.clean:
+                self.logger.debug2("Marking %s as not clean", fn)
+                self.clean.remove(fn)
+            return False
+
+        self.clean.add(fn)
+        return True
+
+    def remove(self, fn):
+        """
+        Remove a fn from the cache
+        Called from the parser in error cases
+        """
+        if fn in self.depends_cache:
+            self.logger.debug("Removing %s from cache", fn)
+            del self.depends_cache[fn]
+        if fn in self.clean:
+            self.logger.debug("Marking %s as unclean", fn)
+            self.clean.remove(fn)
+
+    def sync(self):
+        """
+        Save the cache
+        Called from the parser when complete (or exiting)
+        """
+        if self.cacheclean:
+            self.logger.debug2("Cache is clean, not saving.")
+            return
+
+        for cache_class in self.caches_array:
+            cache_class_name = cache_class.__name__
+            cachefile = self.getCacheFile(cache_class.cachefile)
+            self.logger.debug2("Writing %s", cachefile)
+            with open(cachefile, "wb") as f:
+                p = pickle.Pickler(f, pickle.HIGHEST_PROTOCOL)
+                p.dump(__cache_version__)
+                p.dump(bb.__version__)
+
+                for key, info_array in self.depends_cache.items():
+                    for info in info_array:
+                        if isinstance(info, RecipeInfoCommon) and info.__class__.__name__ == cache_class_name:
+                            p.dump(key)
+                            p.dump(info)
+
+        del self.depends_cache
+        SiggenRecipeInfo.reset()
+
+    @staticmethod
+    def mtime(cachefile):
+        return bb.parse.cached_mtime_noerror(cachefile)
+
+    def add_info(self, filename, info_array, cacheData, parsed=None, watcher=None):
+        if self.mc is not None:
+            (fn, cls, mc) = virtualfn2realfn(filename)
+            if mc:
+                self.logger.error("Unexpected multiconfig %s", filename)
+                return
+
+            vfn = realfn2virtual(fn, cls, self.mc)
+        else:
+            vfn = filename
+
+        if isinstance(info_array[0], CoreRecipeInfo) and (not info_array[0].skipped):
+            cacheData.add_from_recipeinfo(vfn, info_array)
+
+            if watcher:
+                watcher(info_array[0].file_depends)
+
+        if (info_array[0].skipped or 'SRCREVINACTION' not in info_array[0].pv) and not info_array[0].nocache:
+            if parsed:
+                self.cacheclean = False
+            self.depends_cache[filename] = info_array
+
+class MulticonfigCache(Mapping):
+    def __init__(self, databuilder, data_hash, caches_array):
+        def progress(p):
+            nonlocal current_progress
+            nonlocal previous_progress
+            nonlocal previous_percent
+            nonlocal cachesize
+
+            current_progress = previous_progress + p
+
+            if current_progress > cachesize:
+                # we might have calculated incorrect total size because a file
+                # might've been written out just after we checked its size
+                cachesize = current_progress
+            current_percent = 100 * current_progress / cachesize
+            if current_percent > previous_percent:
+                previous_percent = current_percent
+                bb.event.fire(bb.event.CacheLoadProgress(current_progress, cachesize),
+                                databuilder.data)
+
+
+        cachesize = 0
+        current_progress = 0
+        previous_progress = 0
+        previous_percent = 0
+        self.__caches = {}
+
+        for mc, mcdata in databuilder.mcdata.items():
+            self.__caches[mc] = Cache(databuilder, mc, data_hash, caches_array)
+
+            cachesize += self.__caches[mc].cachesize()
+
+        bb.event.fire(bb.event.CacheLoadStarted(cachesize), databuilder.data)
+        loaded = 0
+
+        for c in self.__caches.values():
+            SiggenRecipeInfo.reset()
+            loaded += c.prepare_cache(progress)
+            previous_progress = current_progress
+
+        # Note: depends cache number is corresponding to the parsing file numbers.
+        # The same file has several caches, still regarded as one item in the cache
+        bb.event.fire(bb.event.CacheLoadCompleted(cachesize, loaded), databuilder.data)
+
+    def __len__(self):
+        return len(self.__caches)
+
+    def __getitem__(self, key):
+        return self.__caches[key]
+
+    def __contains__(self, key):
+        return key in self.__caches
+
+    def __iter__(self):
+        for k in self.__caches:
+            yield k
+
+def init(cooker):
+    """
+    The Objective: Cache the minimum amount of data possible yet get to the
+    stage of building packages (i.e. tryBuild) without reparsing any .bb files.
+
+    To do this, we intercept getVar calls and only cache the variables we see
+    being accessed. We rely on the cache getVar calls being made for all
+    variables bitbake might need to use to reach this stage. For each cached
+    file we need to track:
+
+    * Its mtime
+    * The mtimes of all its dependencies
+    * Whether it caused a parse.SkipRecipe exception
+
+    Files causing parsing errors are evicted from the cache.
+
+    """
+    return Cache(cooker.configuration.data, cooker.configuration.data_hash)
+
+
+class CacheData(object):
+    """
+    The data structures we compile from the cached data
+    """
+
+    def __init__(self, caches_array):
+        self.caches_array = caches_array
+        for cache_class in self.caches_array:
+            if not issubclass(cache_class, RecipeInfoCommon):
+                bb.error("Extra cache data class %s should subclass RecipeInfoCommon class" % cache_class)
+            cache_class.init_cacheData(self)
+
+        # Direct cache variables
+        self.task_queues = {}
+        self.preferred = {}
+        self.tasks = {}
+        # Indirect Cache variables (set elsewhere)
+        self.ignored_dependencies = []
+        self.world_target = set()
+        self.bbfile_priority = {}
+
+    def add_from_recipeinfo(self, fn, info_array):
+        for info in info_array:
+            info.add_cacheData(self, fn)
+
+class MultiProcessCache(object):
+    """
+    BitBake multi-process cache implementation
+
+    Used by the codeparser & file checksum caches
+    """
+
+    def __init__(self):
+        self.cachefile = None
+        self.cachedata = self.create_cachedata()
+        self.cachedata_extras = self.create_cachedata()
+
+    def init_cache(self, cachedir, cache_file_name=None):
+        if not cachedir:
+            return
+
+        bb.utils.mkdirhier(cachedir)
+        self.cachefile = os.path.join(cachedir,
+                                      cache_file_name or self.__class__.cache_file_name)
+        logger.debug("Using cache in '%s'", self.cachefile)
+
+        glf = bb.utils.lockfile(self.cachefile + ".lock")
+
+        try:
+            with open(self.cachefile, "rb") as f:
+                p = pickle.Unpickler(f)
+                data, version = p.load()
+        except:
+            bb.utils.unlockfile(glf)
+            return
+
+        bb.utils.unlockfile(glf)
+
+        if version != self.__class__.CACHE_VERSION:
+            return
+
+        self.cachedata = data
+
+    def create_cachedata(self):
+        data = [{}]
+        return data
+
+    def save_extras(self):
+        if not self.cachefile:
+            return
+
+        have_data = any(self.cachedata_extras)
+        if not have_data:
+            return
+
+        glf = bb.utils.lockfile(self.cachefile + ".lock", shared=True)
+
+        i = os.getpid()
+        lf = None
+        while not lf:
+            lf = bb.utils.lockfile(self.cachefile + ".lock." + str(i), retry=False)
+            if not lf or os.path.exists(self.cachefile + "-" + str(i)):
+                if lf:
+                    bb.utils.unlockfile(lf)
+                    lf = None
+                i = i + 1
+                continue
+
+            with open(self.cachefile + "-" + str(i), "wb") as f:
+                p = pickle.Pickler(f, -1)
+                p.dump([self.cachedata_extras, self.__class__.CACHE_VERSION])
+
+        bb.utils.unlockfile(lf)
+        bb.utils.unlockfile(glf)
+
+    def merge_data(self, source, dest):
+        for j in range(0,len(dest)):
+            for h in source[j]:
+                if h not in dest[j]:
+                    dest[j][h] = source[j][h]
+
+    def save_merge(self):
+        if not self.cachefile:
+            return
+
+        glf = bb.utils.lockfile(self.cachefile + ".lock")
+
+        data = self.cachedata
+
+        have_data = False
+
+        for f in [y for y in os.listdir(os.path.dirname(self.cachefile)) if y.startswith(os.path.basename(self.cachefile) + '-')]:
+            f = os.path.join(os.path.dirname(self.cachefile), f)
+            try:
+                with open(f, "rb") as fd:
+                    p = pickle.Unpickler(fd)
+                    extradata, version = p.load()
+            except (IOError, EOFError):
+                os.unlink(f)
+                continue
+
+            if version != self.__class__.CACHE_VERSION:
+                os.unlink(f)
+                continue
+
+            have_data = True
+            self.merge_data(extradata, data)
+            os.unlink(f)
+
+        if have_data:
+            with open(self.cachefile, "wb") as f:
+                p = pickle.Pickler(f, -1)
+                p.dump([data, self.__class__.CACHE_VERSION])
+
+        bb.utils.unlockfile(glf)
+
+
+class SimpleCache(object):
+    """
+    BitBake multi-process cache implementation
+
+    Used by the codeparser & file checksum caches
+    """
+
+    def __init__(self, version):
+        self.cachefile = None
+        self.cachedata = None
+        self.cacheversion = version
+
+    def init_cache(self, d, cache_file_name=None, defaultdata=None):
+        cachedir = (d.getVar("PERSISTENT_DIR") or
+                    d.getVar("CACHE"))
+        if not cachedir:
+            return defaultdata
+
+        bb.utils.mkdirhier(cachedir)
+        self.cachefile = os.path.join(cachedir,
+                                      cache_file_name or self.__class__.cache_file_name)
+        logger.debug("Using cache in '%s'", self.cachefile)
+
+        glf = bb.utils.lockfile(self.cachefile + ".lock")
+
+        try:
+            with open(self.cachefile, "rb") as f:
+                p = pickle.Unpickler(f)
+                data, version = p.load()
+        except:
+            bb.utils.unlockfile(glf)
+            return defaultdata
+
+        bb.utils.unlockfile(glf)
+
+        if version != self.cacheversion:
+            return defaultdata
+
+        return data
+
+    def save(self, data):
+        if not self.cachefile:
+            return
+
+        glf = bb.utils.lockfile(self.cachefile + ".lock")
+
+        with open(self.cachefile, "wb") as f:
+            p = pickle.Pickler(f, -1)
+            p.dump([data, self.cacheversion])
+
+        bb.utils.unlockfile(glf)
+
+    def copyfile(self, target):
+        if not self.cachefile:
+            return
+
+        glf = bb.utils.lockfile(self.cachefile + ".lock")
+        shutil.copy(self.cachefile, target)
+        bb.utils.unlockfile(glf)

bitbake/lib/bb/cache_extra.py

@@ -0,0 +1,63 @@
+#
+# Extra RecipeInfo will be all defined in this file. Currently,
+# Only Hob (Image Creator) Requests some extra fields. So
+# HobRecipeInfo is defined. It's named HobRecipeInfo because it
+# is introduced by 'hob'. Users could also introduce other
+# RecipeInfo or simply use those already defined RecipeInfo.
+# In the following patch, this newly defined new extra RecipeInfo
+# will be dynamically loaded and used for loading/saving the extra
+# cache fields  
+
+# Copyright (C) 2011, Intel Corporation. All rights reserved.
+
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+from bb.cache import RecipeInfoCommon
+
+class HobRecipeInfo(RecipeInfoCommon):
+    __slots__ = ()
+
+    classname = "HobRecipeInfo"
+    # please override this member with the correct data cache file
+    # such as (bb_cache.dat, bb_extracache_hob.dat) 
+    cachefile = "bb_extracache_" + classname +".dat"        
+
+    # override this member with the list of extra cache fields
+    # that this class will provide
+    cachefields = ['summary', 'license', 'section',
+            'description', 'homepage', 'bugtracker',
+            'prevision', 'files_info']
+
+    def __init__(self, filename, metadata):
+
+        self.summary = self.getvar('SUMMARY', metadata)
+        self.license = self.getvar('LICENSE', metadata)
+        self.section = self.getvar('SECTION', metadata)
+        self.description = self.getvar('DESCRIPTION', metadata)
+        self.homepage = self.getvar('HOMEPAGE', metadata)
+        self.bugtracker = self.getvar('BUGTRACKER', metadata)
+        self.prevision = self.getvar('PR', metadata)
+        self.files_info = self.getvar('FILES_INFO', metadata)
+
+    @classmethod
+    def init_cacheData(cls, cachedata):
+        # CacheData in Hob RecipeInfo Class
+        cachedata.summary = {}
+        cachedata.license = {}
+        cachedata.section = {}
+        cachedata.description = {}
+        cachedata.homepage = {}
+        cachedata.bugtracker = {}
+        cachedata.prevision = {}
+        cachedata.files_info = {}
+
+    def add_cacheData(self, cachedata, fn):
+        cachedata.summary[fn] = self.summary
+        cachedata.license[fn] = self.license
+        cachedata.section[fn] = self.section
+        cachedata.description[fn] = self.description
+        cachedata.homepage[fn] = self.homepage
+        cachedata.bugtracker[fn] = self.bugtracker
+        cachedata.prevision[fn] = self.prevision
+        cachedata.files_info[fn] = self.files_info

bitbake/lib/bb/checksum.py

@@ -0,0 +1,144 @@
+# Local file checksum cache implementation
+#
+# Copyright (C) 2012 Intel Corporation
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import glob
+import operator
+import os
+import stat
+import bb.utils
+import logging
+import re
+from bb.cache import MultiProcessCache
+
+logger = logging.getLogger("BitBake.Cache")
+
+filelist_regex = re.compile(r'(?:(?<=:True)|(?<=:False))\s+')
+
+# mtime cache (non-persistent)
+# based upon the assumption that files do not change during bitbake run
+class FileMtimeCache(object):
+    cache = {}
+
+    def cached_mtime(self, f):
+        if f not in self.cache:
+            self.cache[f] = os.stat(f)[stat.ST_MTIME]
+        return self.cache[f]
+
+    def cached_mtime_noerror(self, f):
+        if f not in self.cache:
+            try:
+                self.cache[f] = os.stat(f)[stat.ST_MTIME]
+            except OSError:
+                return 0
+        return self.cache[f]
+
+    def update_mtime(self, f):
+        self.cache[f] = os.stat(f)[stat.ST_MTIME]
+        return self.cache[f]
+
+    def clear(self):
+        self.cache.clear()
+
+# Checksum + mtime cache (persistent)
+class FileChecksumCache(MultiProcessCache):
+    cache_file_name = "local_file_checksum_cache.dat"
+    CACHE_VERSION = 1
+
+    def __init__(self):
+        self.mtime_cache = FileMtimeCache()
+        MultiProcessCache.__init__(self)
+
+    def get_checksum(self, f):
+        f = os.path.normpath(f)
+        entry = self.cachedata[0].get(f)
+        cmtime = self.mtime_cache.cached_mtime(f)
+        if entry:
+            (mtime, hashval) = entry
+            if cmtime == mtime:
+                return hashval
+            else:
+                bb.debug(2, "file %s changed mtime, recompute checksum" % f)
+
+        hashval = bb.utils.md5_file(f)
+        self.cachedata_extras[0][f] = (cmtime, hashval)
+        return hashval
+
+    def merge_data(self, source, dest):
+        for h in source[0]:
+            if h in dest:
+                (smtime, _) = source[0][h]
+                (dmtime, _) = dest[0][h]
+                if smtime > dmtime:
+                    dest[0][h] = source[0][h]
+            else:
+                dest[0][h] = source[0][h]
+
+    def get_checksums(self, filelist, pn, localdirsexclude):
+        """Get checksums for a list of files"""
+
+        def checksum_file(f):
+            try:
+                checksum = self.get_checksum(f)
+            except OSError as e:
+                bb.warn("Unable to get checksum for %s SRC_URI entry %s: %s" % (pn, os.path.basename(f), e))
+                return None
+            return checksum
+
+        #
+        # Changing the format of file-checksums is problematic as both OE and Bitbake have
+        # knowledge of them. We need to encode a new piece of data, the portion of the path
+        # we care about from a checksum perspective. This means that files that change subdirectory
+        # are tracked by the task hashes. To do this, we do something horrible and put a "/./" into
+        # the path. The filesystem handles it but it gives us a marker to know which subsection
+        # of the path to cache.
+        #
+        def checksum_dir(pth):
+            # Handle directories recursively
+            if pth == "/":
+                bb.fatal("Refusing to checksum /")
+            pth = pth.rstrip("/")
+            dirchecksums = []
+            for root, dirs, files in os.walk(pth, topdown=True):
+                [dirs.remove(d) for d in list(dirs) if d in localdirsexclude]
+                for name in files:
+                    fullpth = os.path.join(root, name).replace(pth, os.path.join(pth, "."))
+                    checksum = checksum_file(fullpth)
+                    if checksum:
+                        dirchecksums.append((fullpth, checksum))
+            return dirchecksums
+
+        checksums = []
+        for pth in filelist_regex.split(filelist):
+            if not pth:
+                continue
+            pth = pth.strip()
+            if not pth:
+                continue
+            exist = pth.split(":")[1]
+            if exist == "False":
+                continue
+            pth = pth.split(":")[0]
+            if '*' in pth:
+                # Handle globs
+                for f in glob.glob(pth):
+                    if os.path.isdir(f):
+                        if not os.path.islink(f):
+                            checksums.extend(checksum_dir(f))
+                    else:
+                        checksum = checksum_file(f)
+                        if checksum:
+                            checksums.append((f, checksum))
+            elif os.path.isdir(pth):
+                if not os.path.islink(pth):
+                    checksums.extend(checksum_dir(pth))
+            else:
+                checksum = checksum_file(pth)
+                if checksum:
+                    checksums.append((pth, checksum))
+
+        checksums.sort(key=operator.itemgetter(1))
+        return checksums

bitbake/lib/bb/codeparser.py

@@ -0,0 +1,516 @@
+#
+# Copyright BitBake Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+"""
+BitBake code parser
+
+Parses actual code (i.e. python and shell) for functions and in-line
+expressions. Used mainly to determine dependencies on other functions
+and variables within the BitBake metadata. Also provides a cache for
+this information in order to speed up processing.
+
+(Not to be confused with the code that parses the metadata itself,
+see lib/bb/parse/ for that).
+
+NOTE: if you change how the parsers gather information you will almost
+certainly need to increment CodeParserCache.CACHE_VERSION below so that
+any existing codeparser cache gets invalidated. Additionally you'll need
+to increment __cache_version__ in cache.py in order to ensure that old
+recipe caches don't trigger "Taskhash mismatch" errors.
+
+"""
+
+import ast
+import sys
+import codegen
+import logging
+import inspect
+import bb.pysh as pysh
+import bb.utils, bb.data
+import hashlib
+from itertools import chain
+from bb.pysh import pyshyacc, pyshlex
+from bb.cache import MultiProcessCache
+
+logger = logging.getLogger('BitBake.CodeParser')
+
+def bbhash(s):
+    return hashlib.sha256(s.encode("utf-8")).hexdigest()
+
+def check_indent(codestr):
+    """If the code is indented, add a top level piece of code to 'remove' the indentation"""
+
+    i = 0
+    while codestr[i] in ["\n", "\t", " "]:
+        i = i + 1
+
+    if i == 0:
+        return codestr
+
+    if codestr[i-1] == "\t" or codestr[i-1] == " ":
+        if codestr[0] == "\n":
+            # Since we're adding a line, we need to remove one line of any empty padding
+            # to ensure line numbers are correct
+            codestr = codestr[1:]
+        return "if 1:\n" + codestr
+
+    return codestr
+
+modulecode_deps = {}
+
+def add_module_functions(fn, functions, namespace):
+    fstat = os.stat(fn)
+    fixedhash = fn + ":" + str(fstat.st_size) +  ":" + str(fstat.st_mtime)
+    for f in functions:
+        name = "%s.%s" % (namespace, f)
+        parser = PythonParser(name, logger)
+        try:
+            parser.parse_python(None, filename=fn, lineno=1, fixedhash=fixedhash+f)
+            #bb.warn("Cached %s" % f)
+        except KeyError:
+            lines, lineno = inspect.getsourcelines(functions[f])
+            src = "".join(lines)
+            parser.parse_python(src, filename=fn, lineno=lineno, fixedhash=fixedhash+f)
+            #bb.warn("Not cached %s" % f)
+        execs = parser.execs.copy()
+        # Expand internal module exec references
+        for e in parser.execs:
+            if e in functions:
+                execs.remove(e)
+                execs.add(namespace + "." + e)
+        modulecode_deps[name] = [parser.references.copy(), execs, parser.var_execs.copy(), parser.contains.copy()]
+        #bb.warn("%s: %s\nRefs:%s Execs: %s %s %s" % (name, src, parser.references, parser.execs, parser.var_execs, parser.contains))
+
+def update_module_dependencies(d):
+    for mod in modulecode_deps:
+        excludes = set((d.getVarFlag(mod, "vardepsexclude") or "").split())
+        if excludes:
+            modulecode_deps[mod] = [modulecode_deps[mod][0] - excludes, modulecode_deps[mod][1] - excludes, modulecode_deps[mod][2] - excludes, modulecode_deps[mod][3]]
+
+# A custom getstate/setstate using tuples is actually worth 15% cachesize by
+# avoiding duplication of the attribute names!
+class SetCache(object):
+    def __init__(self):
+        self.setcache = {}
+
+    def internSet(self, items):
+        
+        new = []
+        for i in items:
+            new.append(sys.intern(i))
+        s = frozenset(new)
+        h = hash(s)
+        if h in self.setcache:
+            return self.setcache[h]
+        self.setcache[h] = s
+        return s
+
+codecache = SetCache()
+
+class pythonCacheLine(object):
+    def __init__(self, refs, execs, contains):
+        self.refs = codecache.internSet(refs)
+        self.execs = codecache.internSet(execs)
+        self.contains = {}
+        for c in contains:
+            self.contains[c] = codecache.internSet(contains[c])
+
+    def __getstate__(self):
+        return (self.refs, self.execs, self.contains)
+
+    def __setstate__(self, state):
+        (refs, execs, contains) = state
+        self.__init__(refs, execs, contains)
+    def __hash__(self):
+        l = (hash(self.refs), hash(self.execs))
+        for c in sorted(self.contains.keys()):
+            l = l + (c, hash(self.contains[c]))
+        return hash(l)
+    def __repr__(self):
+        return " ".join([str(self.refs), str(self.execs), str(self.contains)]) 
+
+
+class shellCacheLine(object):
+    def __init__(self, execs):
+        self.execs = codecache.internSet(execs)
+
+    def __getstate__(self):
+        return (self.execs)
+
+    def __setstate__(self, state):
+        (execs) = state
+        self.__init__(execs)
+    def __hash__(self):
+        return hash(self.execs)
+    def __repr__(self):
+        return str(self.execs)
+
+class CodeParserCache(MultiProcessCache):
+    cache_file_name = "bb_codeparser.dat"
+    # NOTE: you must increment this if you change how the parsers gather information,
+    # so that an existing cache gets invalidated. Additionally you'll need
+    # to increment __cache_version__ in cache.py in order to ensure that old
+    # recipe caches don't trigger "Taskhash mismatch" errors.
+    CACHE_VERSION = 11
+
+    def __init__(self):
+        MultiProcessCache.__init__(self)
+        self.pythoncache = self.cachedata[0]
+        self.shellcache = self.cachedata[1]
+        self.pythoncacheextras = self.cachedata_extras[0]
+        self.shellcacheextras = self.cachedata_extras[1]
+
+        # To avoid duplication in the codeparser cache, keep
+        # a lookup of hashes of objects we already have
+        self.pythoncachelines = {}
+        self.shellcachelines = {}
+
+    def newPythonCacheLine(self, refs, execs, contains):
+        cacheline = pythonCacheLine(refs, execs, contains)
+        h = hash(cacheline)
+        if h in self.pythoncachelines:
+            return self.pythoncachelines[h]
+        self.pythoncachelines[h] = cacheline
+        return cacheline
+
+    def newShellCacheLine(self, execs):
+        cacheline = shellCacheLine(execs)
+        h = hash(cacheline)
+        if h in self.shellcachelines:
+            return self.shellcachelines[h]
+        self.shellcachelines[h] = cacheline
+        return cacheline
+
+    def init_cache(self, cachedir):
+        # Check if we already have the caches
+        if self.pythoncache:
+            return
+
+        MultiProcessCache.init_cache(self, cachedir)
+
+        # cachedata gets re-assigned in the parent
+        self.pythoncache = self.cachedata[0]
+        self.shellcache = self.cachedata[1]
+
+    def create_cachedata(self):
+        data = [{}, {}]
+        return data
+
+codeparsercache = CodeParserCache()
+
+def parser_cache_init(cachedir):
+    codeparsercache.init_cache(cachedir)
+
+def parser_cache_save():
+    codeparsercache.save_extras()
+
+def parser_cache_savemerge():
+    codeparsercache.save_merge()
+
+Logger = logging.getLoggerClass()
+class BufferedLogger(Logger):
+    def __init__(self, name, level=0, target=None):
+        Logger.__init__(self, name)
+        self.setLevel(level)
+        self.buffer = []
+        self.target = target
+
+    def handle(self, record):
+        self.buffer.append(record)
+
+    def flush(self):
+        for record in self.buffer:
+            if self.target.isEnabledFor(record.levelno):
+                self.target.handle(record)
+        self.buffer = []
+
+class DummyLogger():
+    def flush(self):
+        return
+
+class PythonParser():
+    getvars = (".getVar", ".appendVar", ".prependVar", "oe.utils.conditional")
+    getvarflags = (".getVarFlag", ".appendVarFlag", ".prependVarFlag")
+    containsfuncs = ("bb.utils.contains", "base_contains")
+    containsanyfuncs = ("bb.utils.contains_any",  "bb.utils.filter")
+    execfuncs = ("bb.build.exec_func", "bb.build.exec_task")
+
+    def warn(self, func, arg):
+        """Warn about calls of bitbake APIs which pass a non-literal
+        argument for the variable name, as we're not able to track such
+        a reference.
+        """
+
+        try:
+            funcstr = codegen.to_source(func)
+            argstr = codegen.to_source(arg)
+        except TypeError:
+            self.log.debug2('Failed to convert function and argument to source form')
+        else:
+            self.log.debug(self.unhandled_message % (funcstr, argstr))
+
+    def visit_Call(self, node):
+        name = self.called_node_name(node.func)
+        if name and (name.endswith(self.getvars) or name.endswith(self.getvarflags) or name in self.containsfuncs or name in self.containsanyfuncs):
+            if isinstance(node.args[0], ast.Str):
+                varname = node.args[0].s
+                if name in self.containsfuncs and isinstance(node.args[1], ast.Str):
+                    if varname not in self.contains:
+                        self.contains[varname] = set()
+                    self.contains[varname].add(node.args[1].s)
+                elif name in self.containsanyfuncs and isinstance(node.args[1], ast.Str):
+                    if varname not in self.contains:
+                        self.contains[varname] = set()
+                    self.contains[varname].update(node.args[1].s.split())
+                elif name.endswith(self.getvarflags):
+                    if isinstance(node.args[1], ast.Str):
+                        self.references.add('%s[%s]' % (varname, node.args[1].s))
+                    else:
+                        self.warn(node.func, node.args[1])
+                else:
+                    self.references.add(varname)
+            else:
+                self.warn(node.func, node.args[0])
+        elif name and name.endswith(".expand"):
+            if isinstance(node.args[0], ast.Str):
+                value = node.args[0].s
+                d = bb.data.init()
+                parser = d.expandWithRefs(value, self.name)
+                self.references |= parser.references
+                self.execs |= parser.execs
+                for varname in parser.contains:
+                    if varname not in self.contains:
+                        self.contains[varname] = set()
+                    self.contains[varname] |= parser.contains[varname]
+        elif name in self.execfuncs:
+            if isinstance(node.args[0], ast.Str):
+                self.var_execs.add(node.args[0].s)
+            else:
+                self.warn(node.func, node.args[0])
+        elif name and isinstance(node.func, (ast.Name, ast.Attribute)):
+            self.execs.add(name)
+
+    def called_node_name(self, node):
+        """Given a called node, return its original string form"""
+        components = []
+        while node:
+            if isinstance(node, ast.Attribute):
+                components.append(node.attr)
+                node = node.value
+            elif isinstance(node, ast.Name):
+                components.append(node.id)
+                return '.'.join(reversed(components))
+            else:
+                break
+
+    def __init__(self, name, log):
+        self.name = name
+        self.var_execs = set()
+        self.contains = {}
+        self.execs = set()
+        self.references = set()
+        self._log = log
+        # Defer init as expensive
+        self.log = DummyLogger()
+
+        self.unhandled_message = "in call of %s, argument '%s' is not a string literal"
+        self.unhandled_message = "while parsing %s, %s" % (name, self.unhandled_message)
+
+    # For the python module code it is expensive to have the function text so it is
+    # uses a different fixedhash to cache against. We can take the hit on obtaining the
+    # text if it isn't in the cache.
+    def parse_python(self, node, lineno=0, filename="<string>", fixedhash=None):
+        if not fixedhash and (not node or not node.strip()):
+            return
+
+        if fixedhash:
+            h = fixedhash
+        else:
+            h = bbhash(str(node))
+
+        if h in codeparsercache.pythoncache:
+            self.references = set(codeparsercache.pythoncache[h].refs)
+            self.execs = set(codeparsercache.pythoncache[h].execs)
+            self.contains = {}
+            for i in codeparsercache.pythoncache[h].contains:
+                self.contains[i] = set(codeparsercache.pythoncache[h].contains[i])
+            return
+
+        if h in codeparsercache.pythoncacheextras:
+            self.references = set(codeparsercache.pythoncacheextras[h].refs)
+            self.execs = set(codeparsercache.pythoncacheextras[h].execs)
+            self.contains = {}
+            for i in codeparsercache.pythoncacheextras[h].contains:
+                self.contains[i] = set(codeparsercache.pythoncacheextras[h].contains[i])
+            return
+
+        if fixedhash and not node:
+            raise KeyError
+
+        # Need to parse so take the hit on the real log buffer
+        self.log = BufferedLogger('BitBake.Data.PythonParser', logging.DEBUG, self._log)
+
+        # We can't add to the linenumbers for compile, we can pad to the correct number of blank lines though
+        node = "\n" * int(lineno) + node
+        code = compile(check_indent(str(node)), filename, "exec",
+                       ast.PyCF_ONLY_AST)
+
+        for n in ast.walk(code):
+            if n.__class__.__name__ == "Call":
+                self.visit_Call(n)
+
+        self.execs.update(self.var_execs)
+
+        codeparsercache.pythoncacheextras[h] = codeparsercache.newPythonCacheLine(self.references, self.execs, self.contains)
+
+class ShellParser():
+    def __init__(self, name, log):
+        self.funcdefs = set()
+        self.allexecs = set()
+        self.execs = set()
+        self._name = name
+        self._log = log
+        # Defer init as expensive
+        self.log = DummyLogger()
+
+        self.unhandled_template = "unable to handle non-literal command '%s'"
+        self.unhandled_template = "while parsing %s, %s" % (name, self.unhandled_template)
+
+    def parse_shell(self, value):
+        """Parse the supplied shell code in a string, returning the external
+        commands it executes.
+        """
+
+        h = bbhash(str(value))
+
+        if h in codeparsercache.shellcache:
+            self.execs = set(codeparsercache.shellcache[h].execs)
+            return self.execs
+
+        if h in codeparsercache.shellcacheextras:
+            self.execs = set(codeparsercache.shellcacheextras[h].execs)
+            return self.execs
+
+        # Need to parse so take the hit on the real log buffer
+        self.log = BufferedLogger('BitBake.Data.%s' % self._name, logging.DEBUG, self._log)
+
+        self._parse_shell(value)
+        self.execs = set(cmd for cmd in self.allexecs if cmd not in self.funcdefs)
+
+        codeparsercache.shellcacheextras[h] = codeparsercache.newShellCacheLine(self.execs)
+
+        return self.execs
+
+    def _parse_shell(self, value):
+        try:
+            tokens, _ = pyshyacc.parse(value, eof=True, debug=False)
+        except Exception:
+            bb.error('Error during parse shell code, the last 5 lines are:\n%s' % '\n'.join(value.split('\n')[-5:]))
+            raise
+
+        self.process_tokens(tokens)
+
+    def process_tokens(self, tokens):
+        """Process a supplied portion of the syntax tree as returned by
+        pyshyacc.parse.
+        """
+
+        def function_definition(value):
+            self.funcdefs.add(value.name)
+            return [value.body], None
+
+        def case_clause(value):
+            # Element 0 of each item in the case is the list of patterns, and
+            # Element 1 of each item in the case is the list of commands to be
+            # executed when that pattern matches.
+            words = chain(*[item[0] for item in value.items])
+            cmds  = chain(*[item[1] for item in value.items])
+            return cmds, words
+
+        def if_clause(value):
+            main = chain(value.cond, value.if_cmds)
+            rest = value.else_cmds
+            if isinstance(rest, tuple) and rest[0] == "elif":
+                return chain(main, if_clause(rest[1]))
+            else:
+                return chain(main, rest)
+
+        def simple_command(value):
+            return None, chain(value.words, (assign[1] for assign in value.assigns))
+
+        token_handlers = {
+            "and_or": lambda x: ((x.left, x.right), None),
+            "async": lambda x: ([x], None),
+            "brace_group": lambda x: (x.cmds, None),
+            "for_clause": lambda x: (x.cmds, x.items),
+            "function_definition": function_definition,
+            "if_clause": lambda x: (if_clause(x), None),
+            "pipeline": lambda x: (x.commands, None),
+            "redirect_list": lambda x: ([x.cmd], None),
+            "subshell": lambda x: (x.cmds, None),
+            "while_clause": lambda x: (chain(x.condition, x.cmds), None),
+            "until_clause": lambda x: (chain(x.condition, x.cmds), None),
+            "simple_command": simple_command,
+            "case_clause": case_clause,
+        }
+
+        def process_token_list(tokens):
+            for token in tokens:
+                if isinstance(token, list):
+                    process_token_list(token)
+                    continue
+                name, value = token
+                try:
+                    more_tokens, words = token_handlers[name](value)
+                except KeyError:
+                    raise NotImplementedError("Unsupported token type " + name)
+
+                if more_tokens:
+                    self.process_tokens(more_tokens)
+
+                if words:
+                    self.process_words(words)
+
+        process_token_list(tokens)
+
+    def process_words(self, words):
+        """Process a set of 'words' in pyshyacc parlance, which includes
+        extraction of executed commands from $() blocks, as well as grabbing
+        the command name argument.
+        """
+
+        words = list(words)
+        for word in list(words):
+            wtree = pyshlex.make_wordtree(word[1])
+            for part in wtree:
+                if not isinstance(part, list):
+                    continue
+
+                if part[0] in ('`', '$('):
+                    command = pyshlex.wordtree_as_string(part[1:-1])
+                    self._parse_shell(command)
+
+                    if word[0] in ("cmd_name", "cmd_word"):
+                        if word in words:
+                            words.remove(word)
+
+        usetoken = False
+        for word in words:
+            if word[0] in ("cmd_name", "cmd_word") or \
+               (usetoken and word[0] == "TOKEN"):
+                if "=" in word[1]:
+                    usetoken = True
+                    continue
+
+                cmd = word[1]
+                if cmd.startswith("$"):
+                    self.log.debug(self.unhandled_template % cmd)
+                elif cmd == "eval":
+                    command = " ".join(word for _, word in words[1:])
+                    self._parse_shell(command)
+                else:
+                    self.allexecs.add(cmd)
+                break

bitbake/lib/bb/command.py

@@ -0,0 +1,777 @@
+"""
+BitBake 'Command' module
+
+Provide an interface to interact with the bitbake server through 'commands'
+"""
+
+# Copyright (C) 2006-2007  Richard Purdie
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+"""
+The bitbake server takes 'commands' from its UI/commandline.
+Commands are either synchronous or asynchronous.
+Async commands return data to the client in the form of events.
+Sync commands must only return data through the function return value
+and must not trigger events, directly or indirectly.
+Commands are queued in a CommandQueue
+"""
+
+from collections import OrderedDict, defaultdict
+
+import io
+import bb.event
+import bb.cooker
+import bb.remotedata
+
+class DataStoreConnectionHandle(object):
+    def __init__(self, dsindex=0):
+        self.dsindex = dsindex
+
+class CommandCompleted(bb.event.Event):
+    pass
+
+class CommandExit(bb.event.Event):
+    def  __init__(self, exitcode):
+        bb.event.Event.__init__(self)
+        self.exitcode = int(exitcode)
+
+class CommandFailed(CommandExit):
+    def __init__(self, message):
+        self.error = message
+        CommandExit.__init__(self, 1)
+    def __str__(self):
+        return "Command execution failed: %s" % self.error
+
+class CommandError(Exception):
+    pass
+
+class Command:
+    """
+    A queue of asynchronous commands for bitbake
+    """
+    def __init__(self, cooker, process_server):
+        self.cooker = cooker
+        self.cmds_sync = CommandsSync()
+        self.cmds_async = CommandsAsync()
+        self.remotedatastores = None
+
+        self.process_server = process_server
+        # Access with locking using process_server.{get/set/clear}_async_cmd()
+        self.currentAsyncCommand = None
+
+    def runCommand(self, commandline, process_server, ro_only=False):
+        command = commandline.pop(0)
+
+        # Ensure cooker is ready for commands
+        if command != "updateConfig" and command != "setFeatures":
+            try:
+                self.cooker.init_configdata()
+                if not self.remotedatastores:
+                    self.remotedatastores = bb.remotedata.RemoteDatastores(self.cooker)
+            except (Exception, SystemExit) as exc:
+                import traceback
+                if isinstance(exc, bb.BBHandledException):
+                    # We need to start returning real exceptions here. Until we do, we can't
+                    # tell if an exception is an instance of bb.BBHandledException
+                    return None, "bb.BBHandledException()\n" + traceback.format_exc()
+                return None, traceback.format_exc()
+
+        if hasattr(CommandsSync, command):
+            # Can run synchronous commands straight away
+            command_method = getattr(self.cmds_sync, command)
+            if ro_only:
+                if not hasattr(command_method, 'readonly') or not getattr(command_method, 'readonly'):
+                    return None, "Not able to execute not readonly commands in readonly mode"
+            try:
+                self.cooker.process_inotify_updates_apply()
+                if getattr(command_method, 'needconfig', True):
+                    self.cooker.updateCacheSync()
+                result = command_method(self, commandline)
+            except CommandError as exc:
+                return None, exc.args[0]
+            except (Exception, SystemExit) as exc:
+                import traceback
+                if isinstance(exc, bb.BBHandledException):
+                    # We need to start returning real exceptions here. Until we do, we can't
+                    # tell if an exception is an instance of bb.BBHandledException
+                    return None, "bb.BBHandledException()\n" + traceback.format_exc()
+                return None, traceback.format_exc()
+            else:
+                return result, None
+        if command not in CommandsAsync.__dict__:
+            return None, "No such command"
+        if not process_server.set_async_cmd((command, commandline)):
+            return None, "Busy (%s in progress)" % self.process_server.get_async_cmd()[0]
+        self.cooker.idleCallBackRegister(self.runAsyncCommand, process_server)
+        return True, None
+
+    def runAsyncCommand(self, _, process_server, halt):
+        try:
+            self.cooker.process_inotify_updates_apply()
+            if self.cooker.state in (bb.cooker.state.error, bb.cooker.state.shutdown, bb.cooker.state.forceshutdown):
+                # updateCache will trigger a shutdown of the parser
+                # and then raise BBHandledException triggering an exit
+                self.cooker.updateCache()
+                return bb.server.process.idleFinish("Cooker in error state")
+            cmd = process_server.get_async_cmd()
+            if cmd is not None:
+                (command, options) = cmd
+                commandmethod = getattr(CommandsAsync, command)
+                needcache = getattr( commandmethod, "needcache" )
+                if needcache and self.cooker.state != bb.cooker.state.running:
+                    self.cooker.updateCache()
+                    return True
+                else:
+                    commandmethod(self.cmds_async, self, options)
+                    return False
+            else:
+                return bb.server.process.idleFinish("Nothing to do, no async command?")
+        except KeyboardInterrupt as exc:
+            return bb.server.process.idleFinish("Interrupted")
+        except SystemExit as exc:
+            arg = exc.args[0]
+            if isinstance(arg, str):
+                return bb.server.process.idleFinish(arg)
+            else:
+                return bb.server.process.idleFinish("Exited with %s" % arg)
+        except Exception as exc:
+            import traceback
+            if isinstance(exc, bb.BBHandledException):
+                return bb.server.process.idleFinish("")
+            else:
+                return bb.server.process.idleFinish(traceback.format_exc())
+
+    def finishAsyncCommand(self, msg=None, code=None):
+        if msg or msg == "":
+            bb.event.fire(CommandFailed(msg), self.cooker.data)
+        elif code:
+            bb.event.fire(CommandExit(code), self.cooker.data)
+        else:
+            bb.event.fire(CommandCompleted(), self.cooker.data)
+        self.cooker.finishcommand()
+        self.process_server.clear_async_cmd()
+
+    def reset(self):
+        if self.remotedatastores:
+           self.remotedatastores = bb.remotedata.RemoteDatastores(self.cooker)
+
+class CommandsSync:
+    """
+    A class of synchronous commands
+    These should run quickly so as not to hurt interactive performance.
+    These must not influence any running synchronous command.
+    """
+
+    def ping(self, command, params):
+        """
+        Allow a UI to check the server is still alive
+        """
+        return "Still alive!"
+
+    def stateShutdown(self, command, params):
+        """
+        Trigger cooker 'shutdown' mode
+        """
+        command.cooker.shutdown(False)
+
+    def stateForceShutdown(self, command, params):
+        """
+        Stop the cooker
+        """
+        command.cooker.shutdown(True)
+
+    def getAllKeysWithFlags(self, command, params):
+        """
+        Returns a dump of the global state. Call with
+        variable flags to be retrieved as params.
+        """
+        flaglist = params[0]
+        return command.cooker.getAllKeysWithFlags(flaglist)
+    getAllKeysWithFlags.readonly = True
+
+    def getVariable(self, command, params):
+        """
+        Read the value of a variable from data
+        """
+        varname = params[0]
+        expand = True
+        if len(params) > 1:
+            expand = (params[1] == "True")
+
+        return command.cooker.data.getVar(varname, expand)
+    getVariable.readonly = True
+
+    def setVariable(self, command, params):
+        """
+        Set the value of variable in data
+        """
+        varname = params[0]
+        value = str(params[1])
+        command.cooker.extraconfigdata[varname] = value
+        command.cooker.data.setVar(varname, value)
+
+    def getSetVariable(self, command, params):
+        """
+        Read the value of a variable from data and set it into the datastore
+        which effectively expands and locks the value.
+        """
+        varname = params[0]
+        result = self.getVariable(command, params)
+        command.cooker.data.setVar(varname, result)
+        return result
+
+    def setConfig(self, command, params):
+        """
+        Set the value of variable in configuration
+        """
+        varname = params[0]
+        value = str(params[1])
+        setattr(command.cooker.configuration, varname, value)
+
+    def enableDataTracking(self, command, params):
+        """
+        Enable history tracking for variables
+        """
+        command.cooker.enableDataTracking()
+
+    def disableDataTracking(self, command, params):
+        """
+        Disable history tracking for variables
+        """
+        command.cooker.disableDataTracking()
+
+    def setPrePostConfFiles(self, command, params):
+        prefiles = params[0].split()
+        postfiles = params[1].split()
+        command.cooker.configuration.prefile = prefiles
+        command.cooker.configuration.postfile = postfiles
+    setPrePostConfFiles.needconfig = False
+
+    def matchFile(self, command, params):
+        fMatch = params[0]
+        try:
+            mc = params[0]
+        except IndexError:
+            mc = ''
+        return command.cooker.matchFile(fMatch, mc)
+    matchFile.needconfig = False
+
+    def getUIHandlerNum(self, command, params):
+        return bb.event.get_uihandler()
+    getUIHandlerNum.needconfig = False
+    getUIHandlerNum.readonly = True
+
+    def setEventMask(self, command, params):
+        handlerNum = params[0]
+        llevel = params[1]
+        debug_domains = params[2]
+        mask = params[3]
+        return bb.event.set_UIHmask(handlerNum, llevel, debug_domains, mask)
+    setEventMask.needconfig = False
+    setEventMask.readonly = True
+
+    def setFeatures(self, command, params):
+        """
+        Set the cooker features to include the passed list of features
+        """
+        features = params[0]
+        command.cooker.setFeatures(features)
+    setFeatures.needconfig = False
+    # although we change the internal state of the cooker, this is transparent since
+    # we always take and leave the cooker in state.initial
+    setFeatures.readonly = True
+
+    def updateConfig(self, command, params):
+        options = params[0]
+        environment = params[1]
+        cmdline = params[2]
+        command.cooker.updateConfigOpts(options, environment, cmdline)
+    updateConfig.needconfig = False
+
+    def parseConfiguration(self, command, params):
+        """Instruct bitbake to parse its configuration
+        NOTE: it is only necessary to call this if you aren't calling any normal action
+        (otherwise parsing is taken care of automatically)
+        """
+        command.cooker.parseConfiguration()
+    parseConfiguration.needconfig = False
+
+    def getLayerPriorities(self, command, params):
+        command.cooker.parseConfiguration()
+        ret = []
+        # regex objects cannot be marshalled by xmlrpc
+        for collection, pattern, regex, pri in command.cooker.bbfile_config_priorities:
+            ret.append((collection, pattern, regex.pattern, pri))
+        return ret
+    getLayerPriorities.readonly = True
+
+    def getRecipes(self, command, params):
+        try:
+            mc = params[0]
+        except IndexError:
+            mc = ''
+        return list(command.cooker.recipecaches[mc].pkg_pn.items())
+    getRecipes.readonly = True
+
+    def getRecipeDepends(self, command, params):
+        try:
+            mc = params[0]
+        except IndexError:
+            mc = ''
+        return list(command.cooker.recipecaches[mc].deps.items())
+    getRecipeDepends.readonly = True
+
+    def getRecipeVersions(self, command, params):
+        try:
+            mc = params[0]
+        except IndexError:
+            mc = ''
+        return command.cooker.recipecaches[mc].pkg_pepvpr
+    getRecipeVersions.readonly = True
+
+    def getRecipeProvides(self, command, params):
+        try:
+            mc = params[0]
+        except IndexError:
+            mc = ''
+        return command.cooker.recipecaches[mc].fn_provides
+    getRecipeProvides.readonly = True
+
+    def getRecipePackages(self, command, params):
+        try:
+            mc = params[0]
+        except IndexError:
+            mc = ''
+        return command.cooker.recipecaches[mc].packages
+    getRecipePackages.readonly = True
+
+    def getRecipePackagesDynamic(self, command, params):
+        try:
+            mc = params[0]
+        except IndexError:
+            mc = ''
+        return command.cooker.recipecaches[mc].packages_dynamic
+    getRecipePackagesDynamic.readonly = True
+
+    def getRProviders(self, command, params):
+        try:
+            mc = params[0]
+        except IndexError:
+            mc = ''
+        return command.cooker.recipecaches[mc].rproviders
+    getRProviders.readonly = True
+
+    def getRuntimeDepends(self, command, params):
+        ret = []
+        try:
+            mc = params[0]
+        except IndexError:
+            mc = ''
+        rundeps = command.cooker.recipecaches[mc].rundeps
+        for key, value in rundeps.items():
+            if isinstance(value, defaultdict):
+                value = dict(value)
+            ret.append((key, value))
+        return ret
+    getRuntimeDepends.readonly = True
+
+    def getRuntimeRecommends(self, command, params):
+        ret = []
+        try:
+            mc = params[0]
+        except IndexError:
+            mc = ''
+        runrecs = command.cooker.recipecaches[mc].runrecs
+        for key, value in runrecs.items():
+            if isinstance(value, defaultdict):
+                value = dict(value)
+            ret.append((key, value))
+        return ret
+    getRuntimeRecommends.readonly = True
+
+    def getRecipeInherits(self, command, params):
+        try:
+            mc = params[0]
+        except IndexError:
+            mc = ''
+        return command.cooker.recipecaches[mc].inherits
+    getRecipeInherits.readonly = True
+
+    def getBbFilePriority(self, command, params):
+        try:
+            mc = params[0]
+        except IndexError:
+            mc = ''
+        return command.cooker.recipecaches[mc].bbfile_priority
+    getBbFilePriority.readonly = True
+
+    def getDefaultPreference(self, command, params):
+        try:
+            mc = params[0]
+        except IndexError:
+            mc = ''
+        return command.cooker.recipecaches[mc].pkg_dp
+    getDefaultPreference.readonly = True
+
+    def getSkippedRecipes(self, command, params):
+        # Return list sorted by reverse priority order
+        import bb.cache
+        def sortkey(x):
+            vfn, _ = x
+            realfn, _, mc = bb.cache.virtualfn2realfn(vfn)
+            return (-command.cooker.collections[mc].calc_bbfile_priority(realfn)[0], vfn)
+
+        skipdict = OrderedDict(sorted(command.cooker.skiplist.items(), key=sortkey))
+        return list(skipdict.items())
+    getSkippedRecipes.readonly = True
+
+    def getOverlayedRecipes(self, command, params):
+        try:
+            mc = params[0]
+        except IndexError:
+            mc = ''
+        return list(command.cooker.collections[mc].overlayed.items())
+    getOverlayedRecipes.readonly = True
+
+    def getFileAppends(self, command, params):
+        fn = params[0]
+        try:
+            mc = params[1]
+        except IndexError:
+            mc = ''
+        return command.cooker.collections[mc].get_file_appends(fn)
+    getFileAppends.readonly = True
+
+    def getAllAppends(self, command, params):
+        try:
+            mc = params[0]
+        except IndexError:
+            mc = ''
+        return command.cooker.collections[mc].bbappends
+    getAllAppends.readonly = True
+
+    def findProviders(self, command, params):
+        try:
+            mc = params[0]
+        except IndexError:
+            mc = ''
+        return command.cooker.findProviders(mc)
+    findProviders.readonly = True
+
+    def findBestProvider(self, command, params):
+        (mc, pn) = bb.runqueue.split_mc(params[0])
+        return command.cooker.findBestProvider(pn, mc)
+    findBestProvider.readonly = True
+
+    def allProviders(self, command, params):
+        try:
+            mc = params[0]
+        except IndexError:
+            mc = ''
+        return list(bb.providers.allProviders(command.cooker.recipecaches[mc]).items())
+    allProviders.readonly = True
+
+    def getRuntimeProviders(self, command, params):
+        rprovide = params[0]
+        try:
+            mc = params[1]
+        except IndexError:
+            mc = ''
+        all_p = bb.providers.getRuntimeProviders(command.cooker.recipecaches[mc], rprovide)
+        if all_p:
+            best = bb.providers.filterProvidersRunTime(all_p, rprovide,
+                            command.cooker.data,
+                            command.cooker.recipecaches[mc])[0][0]
+        else:
+            best = None
+        return all_p, best
+    getRuntimeProviders.readonly = True
+
+    def dataStoreConnectorCmd(self, command, params):
+        dsindex = params[0]
+        method = params[1]
+        args = params[2]
+        kwargs = params[3]
+
+        d = command.remotedatastores[dsindex]
+        ret = getattr(d, method)(*args, **kwargs)
+
+        if isinstance(ret, bb.data_smart.DataSmart):
+            idx = command.remotedatastores.store(ret)
+            return DataStoreConnectionHandle(idx)
+
+        return ret
+
+    def dataStoreConnectorVarHistCmd(self, command, params):
+        dsindex = params[0]
+        method = params[1]
+        args = params[2]
+        kwargs = params[3]
+
+        d = command.remotedatastores[dsindex].varhistory
+        return getattr(d, method)(*args, **kwargs)
+
+    def dataStoreConnectorVarHistCmdEmit(self, command, params):
+        dsindex = params[0]
+        var = params[1]
+        oval = params[2]
+        val = params[3]
+        d = command.remotedatastores[params[4]]
+
+        o = io.StringIO()
+        command.remotedatastores[dsindex].varhistory.emit(var, oval, val, o, d)
+        return o.getvalue()
+
+    def dataStoreConnectorIncHistCmd(self, command, params):
+        dsindex = params[0]
+        method = params[1]
+        args = params[2]
+        kwargs = params[3]
+
+        d = command.remotedatastores[dsindex].inchistory
+        return getattr(d, method)(*args, **kwargs)
+
+    def dataStoreConnectorRelease(self, command, params):
+        dsindex = params[0]
+        if dsindex <= 0:
+            raise CommandError('dataStoreConnectorRelease: invalid index %d' % dsindex)
+        command.remotedatastores.release(dsindex)
+
+    def parseRecipeFile(self, command, params):
+        """
+        Parse the specified recipe file (with or without bbappends)
+        and return a datastore object representing the environment
+        for the recipe.
+        """
+        fn = params[0]
+        mc = bb.runqueue.mc_from_tid(fn)
+        appends = params[1]
+        appendlist = params[2]
+        if len(params) > 3:
+            config_data = command.remotedatastores[params[3]]
+        else:
+            config_data = None
+
+        if appends:
+            if appendlist is not None:
+                appendfiles = appendlist
+            else:
+                appendfiles = command.cooker.collections[mc].get_file_appends(fn)
+        else:
+            appendfiles = []
+        # We are calling bb.cache locally here rather than on the server,
+        # but that's OK because it doesn't actually need anything from
+        # the server barring the global datastore (which we have a remote
+        # version of)
+        if config_data:
+            # We have to use a different function here if we're passing in a datastore
+            # NOTE: we took a copy above, so we don't do it here again
+            envdata = command.cooker.databuilder._parse_recipe(config_data, fn, appendfiles, mc)['']
+        else:
+            # Use the standard path
+            envdata = command.cooker.databuilder.parseRecipe(fn, appendfiles)
+        idx = command.remotedatastores.store(envdata)
+        return DataStoreConnectionHandle(idx)
+    parseRecipeFile.readonly = True
+
+class CommandsAsync:
+    """
+    A class of asynchronous commands
+    These functions communicate via generated events.
+    Any function that requires metadata parsing should be here.
+    """
+
+    def buildFile(self, command, params):
+        """
+        Build a single specified .bb file
+        """
+        bfile = params[0]
+        task = params[1]
+        if len(params) > 2:
+            internal = params[2]
+        else:
+            internal = False
+
+        if internal:
+            command.cooker.buildFileInternal(bfile, task, fireevents=False, quietlog=True)
+        else:
+            command.cooker.buildFile(bfile, task)
+    buildFile.needcache = False
+
+    def buildTargets(self, command, params):
+        """
+        Build a set of targets
+        """
+        pkgs_to_build = params[0]
+        task = params[1]
+
+        command.cooker.buildTargets(pkgs_to_build, task)
+    buildTargets.needcache = True
+
+    def generateDepTreeEvent(self, command, params):
+        """
+        Generate an event containing the dependency information
+        """
+        pkgs_to_build = params[0]
+        task = params[1]
+
+        command.cooker.generateDepTreeEvent(pkgs_to_build, task)
+        command.finishAsyncCommand()
+    generateDepTreeEvent.needcache = True
+
+    def generateDotGraph(self, command, params):
+        """
+        Dump dependency information to disk as .dot files
+        """
+        pkgs_to_build = params[0]
+        task = params[1]
+
+        command.cooker.generateDotGraphFiles(pkgs_to_build, task)
+        command.finishAsyncCommand()
+    generateDotGraph.needcache = True
+
+    def generateTargetsTree(self, command, params):
+        """
+        Generate a tree of buildable targets.
+        If klass is provided ensure all recipes that inherit the class are
+        included in the package list.
+        If pkg_list provided use that list (plus any extras brought in by
+        klass) rather than generating a tree for all packages.
+        """
+        klass = params[0]
+        pkg_list = params[1]
+
+        command.cooker.generateTargetsTree(klass, pkg_list)
+        command.finishAsyncCommand()
+    generateTargetsTree.needcache = True
+
+    def findConfigFiles(self, command, params):
+        """
+        Find config files which provide appropriate values
+        for the passed configuration variable. i.e. MACHINE
+        """
+        varname = params[0]
+
+        command.cooker.findConfigFiles(varname)
+        command.finishAsyncCommand()
+    findConfigFiles.needcache = False
+
+    def findFilesMatchingInDir(self, command, params):
+        """
+        Find implementation files matching the specified pattern
+        in the requested subdirectory of a BBPATH
+        """
+        pattern = params[0]
+        directory = params[1]
+
+        command.cooker.findFilesMatchingInDir(pattern, directory)
+        command.finishAsyncCommand()
+    findFilesMatchingInDir.needcache = False
+
+    def testCookerCommandEvent(self, command, params):
+        """
+        Dummy command used by OEQA selftest to test tinfoil without IO
+        """
+        pattern = params[0]
+
+        command.cooker.testCookerCommandEvent(pattern)
+        command.finishAsyncCommand()
+    testCookerCommandEvent.needcache = False
+
+    def findConfigFilePath(self, command, params):
+        """
+        Find the path of the requested configuration file
+        """
+        configfile = params[0]
+
+        command.cooker.findConfigFilePath(configfile)
+        command.finishAsyncCommand()
+    findConfigFilePath.needcache = False
+
+    def showVersions(self, command, params):
+        """
+        Show the currently selected versions
+        """
+        command.cooker.showVersions()
+        command.finishAsyncCommand()
+    showVersions.needcache = True
+
+    def showEnvironmentTarget(self, command, params):
+        """
+        Print the environment of a target recipe
+        (needs the cache to work out which recipe to use)
+        """
+        pkg = params[0]
+
+        command.cooker.showEnvironment(None, pkg)
+        command.finishAsyncCommand()
+    showEnvironmentTarget.needcache = True
+
+    def showEnvironment(self, command, params):
+        """
+        Print the standard environment
+        or if specified the environment for a specified recipe
+        """
+        bfile = params[0]
+
+        command.cooker.showEnvironment(bfile)
+        command.finishAsyncCommand()
+    showEnvironment.needcache = False
+
+    def parseFiles(self, command, params):
+        """
+        Parse the .bb files
+        """
+        command.cooker.updateCache()
+        command.finishAsyncCommand()
+    parseFiles.needcache = True
+
+    def compareRevisions(self, command, params):
+        """
+        Parse the .bb files
+        """
+        if bb.fetch.fetcher_compare_revisions(command.cooker.data):
+            command.finishAsyncCommand(code=1)
+        else:
+            command.finishAsyncCommand()
+    compareRevisions.needcache = True
+
+    def triggerEvent(self, command, params):
+        """
+        Trigger a certain event
+        """
+        event = params[0]
+        bb.event.fire(eval(event), command.cooker.data)
+        process_server.clear_async_cmd()
+    triggerEvent.needcache = False
+
+    def resetCooker(self, command, params):
+        """
+        Reset the cooker to its initial state, thus forcing a reparse for
+        any async command that has the needcache property set to True
+        """
+        command.cooker.reset()
+        command.finishAsyncCommand()
+    resetCooker.needcache = False
+
+    def clientComplete(self, command, params):
+        """
+        Do the right thing when the controlling client exits
+        """
+        command.cooker.clientComplete()
+        command.finishAsyncCommand()
+    clientComplete.needcache = False
+
+    def findSigInfo(self, command, params):
+        """
+        Find signature info files via the signature generator
+        """
+        (mc, pn) = bb.runqueue.split_mc(params[0])
+        taskname = params[1]
+        sigs = params[2]
+        res = bb.siggen.find_siginfo(pn, taskname, sigs, command.cooker.databuilder.mcdata[mc])
+        bb.event.fire(bb.event.FindSigInfoResult(res), command.cooker.databuilder.mcdata[mc])
+        command.finishAsyncCommand()
+    findSigInfo.needcache = False

bitbake/lib/bb/compress/_pipecompress.py

@@ -0,0 +1,196 @@
+#
+# Copyright BitBake Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Helper library to implement streaming compression and decompression using an
+# external process
+#
+# This library should be used directly by end users; a wrapper library for the
+# specific compression tool should be created
+
+import builtins
+import io
+import os
+import subprocess
+
+
+def open_wrap(
+    cls, filename, mode="rb", *, encoding=None, errors=None, newline=None, **kwargs
+):
+    """
+    Open a compressed file in binary or text mode.
+
+    Users should not call this directly. A specific compression library can use
+    this helper to provide it's own "open" command
+
+    The filename argument can be an actual filename (a str or bytes object), or
+    an existing file object to read from or write to.
+
+    The mode argument can be "r", "rb", "w", "wb", "x", "xb", "a" or "ab" for
+    binary mode, or "rt", "wt", "xt" or "at" for text mode. The default mode is
+    "rb".
+
+    For binary mode, this function is equivalent to the cls constructor:
+    cls(filename, mode). In this case, the encoding, errors and newline
+    arguments must not be provided.
+
+    For text mode, a cls object is created, and wrapped in an
+    io.TextIOWrapper instance with the specified encoding, error handling
+    behavior, and line ending(s).
+    """
+    if "t" in mode:
+        if "b" in mode:
+            raise ValueError("Invalid mode: %r" % (mode,))
+    else:
+        if encoding is not None:
+            raise ValueError("Argument 'encoding' not supported in binary mode")
+        if errors is not None:
+            raise ValueError("Argument 'errors' not supported in binary mode")
+        if newline is not None:
+            raise ValueError("Argument 'newline' not supported in binary mode")
+
+    file_mode = mode.replace("t", "")
+    if isinstance(filename, (str, bytes, os.PathLike, int)):
+        binary_file = cls(filename, file_mode, **kwargs)
+    elif hasattr(filename, "read") or hasattr(filename, "write"):
+        binary_file = cls(None, file_mode, fileobj=filename, **kwargs)
+    else:
+        raise TypeError("filename must be a str or bytes object, or a file")
+
+    if "t" in mode:
+        return io.TextIOWrapper(
+            binary_file, encoding, errors, newline, write_through=True
+        )
+    else:
+        return binary_file
+
+
+class CompressionError(OSError):
+    pass
+
+
+class PipeFile(io.RawIOBase):
+    """
+    Class that implements generically piping to/from a compression program
+
+    Derived classes should add the function get_compress() and get_decompress()
+    that return the required commands. Input will be piped into stdin and the
+    (de)compressed output should be written to stdout, e.g.:
+
+        class FooFile(PipeCompressionFile):
+            def get_decompress(self):
+                return ["fooc", "--decompress", "--stdout"]
+
+            def get_compress(self):
+                return ["fooc", "--compress", "--stdout"]
+
+    """
+
+    READ = 0
+    WRITE = 1
+
+    def __init__(self, filename=None, mode="rb", *, stderr=None, fileobj=None):
+        if "t" in mode or "U" in mode:
+            raise ValueError("Invalid mode: {!r}".format(mode))
+
+        if not "b" in mode:
+            mode += "b"
+
+        if mode.startswith("r"):
+            self.mode = self.READ
+        elif mode.startswith("w"):
+            self.mode = self.WRITE
+        else:
+            raise ValueError("Invalid mode %r" % mode)
+
+        if fileobj is not None:
+            self.fileobj = fileobj
+        else:
+            self.fileobj = builtins.open(filename, mode or "rb")
+
+        if self.mode == self.READ:
+            self.p = subprocess.Popen(
+                self.get_decompress(),
+                stdin=self.fileobj,
+                stdout=subprocess.PIPE,
+                stderr=stderr,
+                close_fds=True,
+            )
+            self.pipe = self.p.stdout
+        else:
+            self.p = subprocess.Popen(
+                self.get_compress(),
+                stdin=subprocess.PIPE,
+                stdout=self.fileobj,
+                stderr=stderr,
+                close_fds=True,
+            )
+            self.pipe = self.p.stdin
+
+        self.__closed = False
+
+    def _check_process(self):
+        if self.p is None:
+            return
+
+        returncode = self.p.wait()
+        if returncode:
+            raise CompressionError("Process died with %d" % returncode)
+        self.p = None
+
+    def close(self):
+        if self.closed:
+            return
+
+        self.pipe.close()
+        if self.p is not None:
+            self._check_process()
+        self.fileobj.close()
+
+        self.__closed = True
+
+    @property
+    def closed(self):
+        return self.__closed
+
+    def fileno(self):
+        return self.pipe.fileno()
+
+    def flush(self):
+        self.pipe.flush()
+
+    def isatty(self):
+        return self.pipe.isatty()
+
+    def readable(self):
+        return self.mode == self.READ
+
+    def writable(self):
+        return self.mode == self.WRITE
+
+    def readinto(self, b):
+        if self.mode != self.READ:
+            import errno
+
+            raise OSError(
+                errno.EBADF, "read() on write-only %s object" % self.__class__.__name__
+            )
+        size = self.pipe.readinto(b)
+        if size == 0:
+            self._check_process()
+        return size
+
+    def write(self, data):
+        if self.mode != self.WRITE:
+            import errno
+
+            raise OSError(
+                errno.EBADF, "write() on read-only %s object" % self.__class__.__name__
+            )
+        data = self.pipe.write(data)
+
+        if not data:
+            self._check_process()
+
+        return data

bitbake/lib/bb/compress/lz4.py

@@ -0,0 +1,19 @@
+#
+# Copyright BitBake Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import bb.compress._pipecompress
+
+
+def open(*args, **kwargs):
+    return bb.compress._pipecompress.open_wrap(LZ4File, *args, **kwargs)
+
+
+class LZ4File(bb.compress._pipecompress.PipeFile):
+    def get_compress(self):
+        return ["lz4c", "-z", "-c"]
+
+    def get_decompress(self):
+        return ["lz4c", "-d", "-c"]

bitbake/lib/bb/compress/zstd.py

@@ -0,0 +1,30 @@
+#
+# Copyright BitBake Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import bb.compress._pipecompress
+import shutil
+
+
+def open(*args, **kwargs):
+    return bb.compress._pipecompress.open_wrap(ZstdFile, *args, **kwargs)
+
+
+class ZstdFile(bb.compress._pipecompress.PipeFile):
+    def __init__(self, *args, num_threads=1, compresslevel=3, **kwargs):
+        self.num_threads = num_threads
+        self.compresslevel = compresslevel
+        super().__init__(*args, **kwargs)
+
+    def _get_zstd(self):
+        if self.num_threads == 1 or not shutil.which("pzstd"):
+            return ["zstd"]
+        return ["pzstd", "-p", "%d" % self.num_threads]
+
+    def get_compress(self):
+        return self._get_zstd() + ["-c", "-%d" % self.compresslevel]
+
+    def get_decompress(self):
+        return self._get_zstd() + ["-d", "-c"]

bitbake/lib/bb/cookerdata.py

@@ -0,0 +1,546 @@
+#
+# Copyright (C) 2003, 2004  Chris Larson
+# Copyright (C) 2003, 2004  Phil Blundell
+# Copyright (C) 2003 - 2005 Michael 'Mickey' Lauer
+# Copyright (C) 2005        Holger Hans Peter Freyther
+# Copyright (C) 2005        ROAD GmbH
+# Copyright (C) 2006        Richard Purdie
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import logging
+import os
+import re
+import sys
+import hashlib
+from functools import wraps
+import bb
+from bb import data
+import bb.parse
+
+logger      = logging.getLogger("BitBake")
+parselog    = logging.getLogger("BitBake.Parsing")
+
+class ConfigParameters(object):
+    def __init__(self, argv=None):
+        self.options, targets = self.parseCommandLine(argv or sys.argv)
+        self.environment = self.parseEnvironment()
+
+        self.options.pkgs_to_build = targets or []
+
+        for key, val in self.options.__dict__.items():
+            setattr(self, key, val)
+
+    def parseCommandLine(self, argv=sys.argv):
+        raise Exception("Caller must implement commandline option parsing")
+
+    def parseEnvironment(self):
+        return os.environ.copy()
+
+    def updateFromServer(self, server):
+        if not self.options.cmd:
+            defaulttask, error = server.runCommand(["getVariable", "BB_DEFAULT_TASK"])
+            if error:
+                raise Exception("Unable to get the value of BB_DEFAULT_TASK from the server: %s" % error)
+            self.options.cmd = defaulttask or "build"
+        _, error = server.runCommand(["setConfig", "cmd", self.options.cmd])
+        if error:
+            raise Exception("Unable to set configuration option 'cmd' on the server: %s" % error)
+
+        if not self.options.pkgs_to_build:
+            bbpkgs, error = server.runCommand(["getVariable", "BBTARGETS"])
+            if error:
+                raise Exception("Unable to get the value of BBTARGETS from the server: %s" % error)
+            if bbpkgs:
+                self.options.pkgs_to_build.extend(bbpkgs.split())
+
+    def updateToServer(self, server, environment):
+        options = {}
+        for o in ["halt", "force", "invalidate_stamp",
+                  "dry_run", "dump_signatures",
+                  "extra_assume_provided", "profile",
+                  "prefile", "postfile", "server_timeout",
+                  "nosetscene", "setsceneonly", "skipsetscene",
+                  "runall", "runonly", "writeeventlog"]:
+            options[o] = getattr(self.options, o)
+
+        options['build_verbose_shell'] = self.options.verbose
+        options['build_verbose_stdout'] = self.options.verbose
+        options['default_loglevel'] = bb.msg.loggerDefaultLogLevel
+        options['debug_domains'] = bb.msg.loggerDefaultDomains
+
+        ret, error = server.runCommand(["updateConfig", options, environment, sys.argv])
+        if error:
+            raise Exception("Unable to update the server configuration with local parameters: %s" % error)
+
+    def parseActions(self):
+        # Parse any commandline into actions
+        action = {'action':None, 'msg':None}
+        if self.options.show_environment:
+            if 'world' in self.options.pkgs_to_build:
+                action['msg'] = "'world' is not a valid target for --environment."
+            elif 'universe' in self.options.pkgs_to_build:
+                action['msg'] = "'universe' is not a valid target for --environment."
+            elif len(self.options.pkgs_to_build) > 1:
+                action['msg'] = "Only one target can be used with the --environment option."
+            elif self.options.buildfile and len(self.options.pkgs_to_build) > 0:
+                action['msg'] = "No target should be used with the --environment and --buildfile options."
+            elif self.options.pkgs_to_build:
+                action['action'] = ["showEnvironmentTarget", self.options.pkgs_to_build]
+            else:
+                action['action'] = ["showEnvironment", self.options.buildfile]
+        elif self.options.buildfile is not None:
+            action['action'] = ["buildFile", self.options.buildfile, self.options.cmd]
+        elif self.options.revisions_changed:
+            action['action'] = ["compareRevisions"]
+        elif self.options.show_versions:
+            action['action'] = ["showVersions"]
+        elif self.options.parse_only:
+            action['action'] = ["parseFiles"]
+        elif self.options.dot_graph:
+            if self.options.pkgs_to_build:
+                action['action'] = ["generateDotGraph", self.options.pkgs_to_build, self.options.cmd]
+            else:
+                action['msg'] = "Please specify a package name for dependency graph generation."
+        else:
+            if self.options.pkgs_to_build:
+                action['action'] = ["buildTargets", self.options.pkgs_to_build, self.options.cmd]
+            else:
+                #action['msg'] = "Nothing to do.  Use 'bitbake world' to build everything, or run 'bitbake --help' for usage information."
+                action = None
+        self.options.initialaction = action
+        return action
+
+class CookerConfiguration(object):
+    """
+    Manages build options and configurations for one run
+    """
+
+    def __init__(self):
+        self.debug_domains = bb.msg.loggerDefaultDomains
+        self.default_loglevel = bb.msg.loggerDefaultLogLevel
+        self.extra_assume_provided = []
+        self.prefile = []
+        self.postfile = []
+        self.cmd = None
+        self.halt = True
+        self.force = False
+        self.profile = False
+        self.nosetscene = False
+        self.setsceneonly = False
+        self.skipsetscene = False
+        self.invalidate_stamp = False
+        self.dump_signatures = []
+        self.build_verbose_shell = False
+        self.build_verbose_stdout = False
+        self.dry_run = False
+        self.tracking = False
+        self.writeeventlog = False
+        self.limited_deps = False
+        self.runall = []
+        self.runonly = []
+
+        self.env = {}
+
+    def __getstate__(self):
+        state = {}
+        for key in self.__dict__.keys():
+            state[key] = getattr(self, key)
+        return state
+
+    def __setstate__(self,state):
+        for k in state:
+            setattr(self, k, state[k])
+
+
+def catch_parse_error(func):
+    """Exception handling bits for our parsing"""
+    @wraps(func)
+    def wrapped(fn, *args):
+        try:
+            return func(fn, *args)
+        except Exception as exc:
+            import traceback
+
+            bbdir = os.path.dirname(__file__) + os.sep
+            exc_class, exc, tb = sys.exc_info()
+            for tb in iter(lambda: tb.tb_next, None):
+                # Skip frames in bitbake itself, we only want the metadata
+                fn, _, _, _ = traceback.extract_tb(tb, 1)[0]
+                if not fn.startswith(bbdir):
+                    break
+            parselog.critical("Unable to parse %s" % fn, exc_info=(exc_class, exc, tb))
+            raise bb.BBHandledException()
+    return wrapped
+
+@catch_parse_error
+def parse_config_file(fn, data, include=True):
+    return bb.parse.handle(fn, data, include, baseconfig=True)
+
+@catch_parse_error
+def _inherit(bbclass, data):
+    bb.parse.BBHandler.inherit(bbclass, "configuration INHERITs", 0, data)
+    return data
+
+def findConfigFile(configfile, data):
+    search = []
+    bbpath = data.getVar("BBPATH")
+    if bbpath:
+        for i in bbpath.split(":"):
+            search.append(os.path.join(i, "conf", configfile))
+    path = os.getcwd()
+    while path != "/":
+        search.append(os.path.join(path, "conf", configfile))
+        path, _ = os.path.split(path)
+
+    for i in search:
+        if os.path.exists(i):
+            return i
+
+    return None
+
+#
+# We search for a conf/bblayers.conf under an entry in BBPATH or in cwd working
+# up to /. If that fails, bitbake would fall back to cwd.
+#
+
+def findTopdir():
+    d = bb.data.init()
+    bbpath = None
+    if 'BBPATH' in os.environ:
+        bbpath = os.environ['BBPATH']
+        d.setVar('BBPATH', bbpath)
+
+    layerconf = findConfigFile("bblayers.conf", d)
+    if layerconf:
+        return os.path.dirname(os.path.dirname(layerconf))
+
+    return os.path.abspath(os.getcwd())
+
+class CookerDataBuilder(object):
+
+    def __init__(self, cookercfg, worker = False):
+
+        self.prefiles = cookercfg.prefile
+        self.postfiles = cookercfg.postfile
+        self.tracking = cookercfg.tracking
+
+        bb.utils.set_context(bb.utils.clean_context())
+        bb.event.set_class_handlers(bb.event.clean_class_handlers())
+        self.basedata = bb.data.init()
+        if self.tracking:
+            self.basedata.enableTracking()
+
+        # Keep a datastore of the initial environment variables and their
+        # values from when BitBake was launched to enable child processes
+        # to use environment variables which have been cleaned from the
+        # BitBake processes env
+        self.savedenv = bb.data.init()
+        for k in cookercfg.env:
+            self.savedenv.setVar(k, cookercfg.env[k])
+            if k in bb.data_smart.bitbake_renamed_vars:
+                bb.error('Shell environment variable %s has been renamed to %s' % (k, bb.data_smart.bitbake_renamed_vars[k]))
+                bb.fatal("Exiting to allow enviroment variables to be corrected")
+
+        filtered_keys = bb.utils.approved_variables()
+        bb.data.inheritFromOS(self.basedata, self.savedenv, filtered_keys)
+        self.basedata.setVar("BB_ORIGENV", self.savedenv)
+        self.basedata.setVar("__bbclasstype", "global")
+
+        if worker:
+            self.basedata.setVar("BB_WORKERCONTEXT", "1")
+
+        self.data = self.basedata
+        self.mcdata = {}
+
+    def parseBaseConfiguration(self, worker=False):
+        mcdata = {}
+        data_hash = hashlib.sha256()
+        try:
+            self.data = self.parseConfigurationFiles(self.prefiles, self.postfiles)
+
+            if self.data.getVar("BB_WORKERCONTEXT", False) is None and not worker:
+                bb.fetch.fetcher_init(self.data)
+            bb.parse.init_parser(self.data)
+
+            bb.event.fire(bb.event.ConfigParsed(), self.data)
+
+            reparse_cnt = 0
+            while self.data.getVar("BB_INVALIDCONF", False) is True:
+                if reparse_cnt > 20:
+                    logger.error("Configuration has been re-parsed over 20 times, "
+                                 "breaking out of the loop...")
+                    raise Exception("Too deep config re-parse loop. Check locations where "
+                                    "BB_INVALIDCONF is being set (ConfigParsed event handlers)")
+                self.data.setVar("BB_INVALIDCONF", False)
+                self.data = self.parseConfigurationFiles(self.prefiles, self.postfiles)
+                reparse_cnt += 1
+                bb.event.fire(bb.event.ConfigParsed(), self.data)
+
+            bb.parse.init_parser(self.data)
+            data_hash.update(self.data.get_hash().encode('utf-8'))
+            mcdata[''] = self.data
+
+            multiconfig = (self.data.getVar("BBMULTICONFIG") or "").split()
+            for config in multiconfig:
+                if config[0].isdigit():
+                    bb.fatal("Multiconfig name '%s' is invalid as multiconfigs cannot start with a digit" % config)
+                parsed_mcdata = self.parseConfigurationFiles(self.prefiles, self.postfiles, config)
+                bb.event.fire(bb.event.ConfigParsed(), parsed_mcdata)
+                mcdata[config] = parsed_mcdata
+                data_hash.update(parsed_mcdata.get_hash().encode('utf-8'))
+            if multiconfig:
+                bb.event.fire(bb.event.MultiConfigParsed(mcdata), self.data)
+
+            self.data_hash = data_hash.hexdigest()
+        except bb.data_smart.ExpansionError as e:
+            logger.error(str(e))
+            raise bb.BBHandledException()
+
+        bb.codeparser.update_module_dependencies(self.data)
+
+        # Handle obsolete variable names
+        d = self.data
+        renamedvars = d.getVarFlags('BB_RENAMED_VARIABLES') or {}
+        renamedvars.update(bb.data_smart.bitbake_renamed_vars)
+        issues = False
+        for v in renamedvars:
+            if d.getVar(v) != None or d.hasOverrides(v):
+                issues = True
+                loginfo = {}
+                history = d.varhistory.get_variable_refs(v)
+                for h in history:
+                    for line in history[h]:
+                        loginfo = {'file' : h, 'line' : line}
+                        bb.data.data_smart._print_rename_error(v, loginfo, renamedvars)
+                if not history:
+                    bb.data.data_smart._print_rename_error(v, loginfo, renamedvars)
+        if issues:
+            raise bb.BBHandledException()
+
+        for mc in mcdata:
+            mcdata[mc].renameVar("__depends", "__base_depends")
+            mcdata[mc].setVar("__bbclasstype", "recipe")
+
+        # Create a copy so we can reset at a later date when UIs disconnect
+        self.mcorigdata = mcdata
+        for mc in mcdata:
+            self.mcdata[mc] = bb.data.createCopy(mcdata[mc])
+        self.data = self.mcdata['']
+
+    def reset(self):
+        # We may not have run parseBaseConfiguration() yet
+        if not hasattr(self, 'mcorigdata'):
+            return
+        for mc in self.mcorigdata:
+            self.mcdata[mc] = bb.data.createCopy(self.mcorigdata[mc])
+        self.data = self.mcdata['']
+
+    def _findLayerConf(self, data):
+        return findConfigFile("bblayers.conf", data)
+
+    def parseConfigurationFiles(self, prefiles, postfiles, mc = "default"):
+        data = bb.data.createCopy(self.basedata)
+        data.setVar("BB_CURRENT_MC", mc)
+
+        # Parse files for loading *before* bitbake.conf and any includes
+        for f in prefiles:
+            data = parse_config_file(f, data)
+
+        layerconf = self._findLayerConf(data)
+        if layerconf:
+            parselog.debug2("Found bblayers.conf (%s)", layerconf)
+            # By definition bblayers.conf is in conf/ of TOPDIR.
+            # We may have been called with cwd somewhere else so reset TOPDIR
+            data.setVar("TOPDIR", os.path.dirname(os.path.dirname(layerconf)))
+            data = parse_config_file(layerconf, data)
+
+            if not data.getVar("BB_CACHEDIR"):
+                data.setVar("BB_CACHEDIR", "${TOPDIR}/cache")
+
+            bb.codeparser.parser_cache_init(data.getVar("BB_CACHEDIR"))
+
+            layers = (data.getVar('BBLAYERS') or "").split()
+            broken_layers = []
+
+            if not layers:
+                bb.fatal("The bblayers.conf file doesn't contain any BBLAYERS definition")
+
+            data = bb.data.createCopy(data)
+            approved = bb.utils.approved_variables()
+
+            # Check whether present layer directories exist
+            for layer in layers:
+                if not os.path.isdir(layer):
+                    broken_layers.append(layer)
+
+            if broken_layers:
+                parselog.critical("The following layer directories do not exist:")
+                for layer in broken_layers:
+                    parselog.critical("   %s", layer)
+                parselog.critical("Please check BBLAYERS in %s" % (layerconf))
+                raise bb.BBHandledException()
+
+            layerseries = None
+            compat_entries = {}
+            for layer in layers:
+                parselog.debug2("Adding layer %s", layer)
+                if 'HOME' in approved and '~' in layer:
+                    layer = os.path.expanduser(layer)
+                if layer.endswith('/'):
+                    layer = layer.rstrip('/')
+                data.setVar('LAYERDIR', layer)
+                data.setVar('LAYERDIR_RE', re.escape(layer))
+                data = parse_config_file(os.path.join(layer, "conf", "layer.conf"), data)
+                data.expandVarref('LAYERDIR')
+                data.expandVarref('LAYERDIR_RE')
+
+                # Sadly we can't have nice things.
+                # Some layers think they're going to be 'clever' and copy the values from
+                # another layer, e.g. using ${LAYERSERIES_COMPAT_core}. The whole point of
+                # this mechanism is to make it clear which releases a layer supports and
+                # show when a layer master branch is bitrotting and is unmaintained.
+                # We therefore avoid people doing this here.
+                collections = (data.getVar('BBFILE_COLLECTIONS') or "").split()
+                for c in collections:
+                    compat_entry = data.getVar("LAYERSERIES_COMPAT_%s" % c)
+                    if compat_entry:
+                        compat_entries[c] = set(compat_entry.split())
+                        data.delVar("LAYERSERIES_COMPAT_%s" % c)
+                if not layerseries:
+                    layerseries = set((data.getVar("LAYERSERIES_CORENAMES") or "").split())
+                    if layerseries:
+                        data.delVar("LAYERSERIES_CORENAMES")
+
+            data.delVar('LAYERDIR_RE')
+            data.delVar('LAYERDIR')
+            for c in compat_entries:
+                data.setVar("LAYERSERIES_COMPAT_%s" % c, " ".join(sorted(compat_entries[c])))
+
+            bbfiles_dynamic = (data.getVar('BBFILES_DYNAMIC') or "").split()
+            collections = (data.getVar('BBFILE_COLLECTIONS') or "").split()
+            invalid = []
+            for entry in bbfiles_dynamic:
+                parts = entry.split(":", 1)
+                if len(parts) != 2:
+                    invalid.append(entry)
+                    continue
+                l, f = parts
+                invert = l[0] == "!"
+                if invert:
+                    l = l[1:]
+                if (l in collections and not invert) or (l not in collections and invert):
+                    data.appendVar("BBFILES", " " + f)
+            if invalid:
+                bb.fatal("BBFILES_DYNAMIC entries must be of the form {!}<collection name>:<filename pattern>, not:\n    %s" % "\n    ".join(invalid))
+
+            collections_tmp = collections[:]
+            for c in collections:
+                collections_tmp.remove(c)
+                if c in collections_tmp:
+                    bb.fatal("Found duplicated BBFILE_COLLECTIONS '%s', check bblayers.conf or layer.conf to fix it." % c)
+
+                compat = set()
+                if c in compat_entries:
+                    compat = compat_entries[c]
+                if compat and not layerseries:
+                    bb.fatal("No core layer found to work with layer '%s'. Missing entry in bblayers.conf?" % c)
+                if compat and not (compat & layerseries):
+                    bb.fatal("Layer %s is not compatible with the core layer which only supports these series: %s (layer is compatible with %s)"
+                              % (c, " ".join(layerseries), " ".join(compat)))
+                elif not compat and not data.getVar("BB_WORKERCONTEXT"):
+                    bb.warn("Layer %s should set LAYERSERIES_COMPAT_%s in its conf/layer.conf file to list the core layer names it is compatible with." % (c, c))
+
+            data.setVar("LAYERSERIES_CORENAMES", " ".join(sorted(layerseries)))
+
+        if not data.getVar("BBPATH"):
+            msg = "The BBPATH variable is not set"
+            if not layerconf:
+                msg += (" and bitbake did not find a conf/bblayers.conf file in"
+                        " the expected location.\nMaybe you accidentally"
+                        " invoked bitbake from the wrong directory?")
+            bb.fatal(msg)
+
+        if not data.getVar("TOPDIR"):
+            data.setVar("TOPDIR", os.path.abspath(os.getcwd()))
+        if not data.getVar("BB_CACHEDIR"):
+            data.setVar("BB_CACHEDIR", "${TOPDIR}/cache")
+        bb.codeparser.parser_cache_init(data.getVar("BB_CACHEDIR"))
+
+        data = parse_config_file(os.path.join("conf", "bitbake.conf"), data)
+
+        # Parse files for loading *after* bitbake.conf and any includes
+        for p in postfiles:
+            data = parse_config_file(p, data)
+
+        # Handle any INHERITs and inherit the base class
+        bbclasses  = ["base"] + (data.getVar('INHERIT') or "").split()
+        for bbclass in bbclasses:
+            data = _inherit(bbclass, data)
+
+        # Normally we only register event handlers at the end of parsing .bb files
+        # We register any handlers we've found so far here...
+        for var in data.getVar('__BBHANDLERS', False) or []:
+            handlerfn = data.getVarFlag(var, "filename", False)
+            if not handlerfn:
+                parselog.critical("Undefined event handler function '%s'" % var)
+                raise bb.BBHandledException()
+            handlerln = int(data.getVarFlag(var, "lineno", False))
+            bb.event.register(var, data.getVar(var, False),  (data.getVarFlag(var, "eventmask") or "").split(), handlerfn, handlerln, data)
+
+        data.setVar('BBINCLUDED',bb.parse.get_file_depends(data))
+
+        return data
+
+    @staticmethod
+    def _parse_recipe(bb_data, bbfile, appends, mc=''):
+        bb_data.setVar("__BBMULTICONFIG", mc)
+
+        bbfile_loc = os.path.abspath(os.path.dirname(bbfile))
+        bb.parse.cached_mtime_noerror(bbfile_loc)
+
+        if appends:
+            bb_data.setVar('__BBAPPEND', " ".join(appends))
+        bb_data = bb.parse.handle(bbfile, bb_data)
+        return bb_data
+
+    def parseRecipeVariants(self, bbfile, appends, virtonly=False, mc=None):
+        """
+        Load and parse one .bb build file
+        Return the data and whether parsing resulted in the file being skipped
+        """
+
+        if virtonly:
+            (bbfile, virtual, mc) = bb.cache.virtualfn2realfn(bbfile)
+            bb_data = self.mcdata[mc].createCopy()
+            bb_data.setVar("__ONLYFINALISE", virtual or "default")
+            datastores = self._parse_recipe(bb_data, bbfile, appends, mc)
+            return datastores
+
+        if mc is not None:
+            bb_data = self.mcdata[mc].createCopy()
+            return self._parse_recipe(bb_data, bbfile, appends, mc)
+
+        bb_data = self.data.createCopy()
+        datastores = self._parse_recipe(bb_data, bbfile, appends)
+
+        for mc in self.mcdata:
+            if not mc:
+                continue
+            bb_data = self.mcdata[mc].createCopy()
+            newstores = self._parse_recipe(bb_data, bbfile, appends, mc)
+            for ns in newstores:
+                datastores["mc:%s:%s" % (mc, ns)] = newstores[ns]
+
+        return datastores
+
+    def parseRecipe(self, virtualfn, appends):
+        """
+        Return a complete set of data for fn.
+        To do this, we need to parse the file.
+        """
+        logger.debug("Parsing %s (full)" % virtualfn)
+        (fn, virtual, mc) = bb.cache.virtualfn2realfn(virtualfn)
+        bb_data = self.parseRecipeVariants(virtualfn, appends, virtonly=True)
+        return bb_data[virtual]

bitbake/lib/bb/daemonize.py

@@ -0,0 +1,101 @@
+#
+# Copyright BitBake Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+"""
+Python Daemonizing helper
+
+Originally based on code Copyright (C) 2005 Chad J. Schroeder but now heavily modified
+to allow a function to be daemonized and return for bitbake use by Richard Purdie
+"""
+
+import os
+import sys
+import io
+import traceback
+
+import bb
+
+def createDaemon(function, logfile):
+    """
+    Detach a process from the controlling terminal and run it in the
+    background as a daemon, returning control to the caller.
+    """
+
+    # Ensure stdout/stderror are flushed before forking to avoid duplicate output
+    sys.stdout.flush()
+    sys.stderr.flush()
+
+    try:
+        # Fork a child process so the parent can exit.  This returns control to
+        # the command-line or shell.  It also guarantees that the child will not
+        # be a process group leader, since the child receives a new process ID
+        # and inherits the parent's process group ID.  This step is required
+        # to insure that the next call to os.setsid is successful.
+        pid = os.fork()
+    except OSError as e:
+        raise Exception("%s [%d]" % (e.strerror, e.errno))
+
+    if (pid == 0):      # The first child.
+        # To become the session leader of this new session and the process group
+        # leader of the new process group, we call os.setsid().  The process is
+        # also guaranteed not to have a controlling terminal.
+        os.setsid()
+        try:
+            # Fork a second child and exit immediately to prevent zombies.  This
+            # causes the second child process to be orphaned, making the init
+            # process responsible for its cleanup.  And, since the first child is
+            # a session leader without a controlling terminal, it's possible for
+            # it to acquire one by opening a terminal in the future (System V-
+            # based systems).  This second fork guarantees that the child is no
+            # longer a session leader, preventing the daemon from ever acquiring
+            # a controlling terminal.
+            pid = os.fork()     # Fork a second child.
+        except OSError as e:
+            raise Exception("%s [%d]" % (e.strerror, e.errno))
+
+        if (pid != 0):
+            # Parent (the first child) of the second child.
+            # exit() or _exit()?
+            # _exit is like exit(), but it doesn't call any functions registered
+            # with atexit (and on_exit) or any registered signal handlers.  It also
+            # closes any open file descriptors, but doesn't flush any buffered output.
+            # Using exit() may cause all any temporary files to be unexpectedly
+            # removed.  It's therefore recommended that child branches of a fork()
+            # and the parent branch(es) of a daemon use _exit().
+            os._exit(0)
+    else:
+        os.waitpid(pid, 0)
+        return
+
+    # The second child.
+
+    # Replace standard fds with our own
+    with open('/dev/null', 'r') as si:
+        os.dup2(si.fileno(), sys.stdin.fileno())
+
+    with open(logfile, 'a+') as so:
+        try:
+            os.dup2(so.fileno(), sys.stdout.fileno())
+            os.dup2(so.fileno(), sys.stderr.fileno())
+        except io.UnsupportedOperation:
+            sys.stdout = so
+
+        # Have stdout and stderr be the same so log output matches chronologically
+        # and there aren't two separate buffers
+        sys.stderr = sys.stdout
+
+        try:
+            function()
+        except Exception as e:
+            traceback.print_exc()
+        finally:
+            bb.event.print_ui_queue()
+            # os._exit() doesn't flush open files like os.exit() does. Manually flush
+            # stdout and stderr so that any logging output will be seen, particularly
+            # exception tracebacks.
+            sys.stdout.flush()
+            sys.stderr.flush()
+            os._exit(0)

bitbake/lib/bb/data.py

@@ -0,0 +1,447 @@
+"""
+BitBake 'Data' implementations
+
+Functions for interacting with the data structure used by the
+BitBake build tools.
+
+expandKeys and datastore iteration are the most expensive
+operations. Updating overrides is now "on the fly" but still based
+on the idea of the cookie monster introduced by zecke:
+"At night the cookie monster came by and
+suggested 'give me cookies on setting the variables and
+things will work out'. Taking this suggestion into account
+applying the skills from the not yet passed 'Entwurf und
+Analyse von Algorithmen' lecture and the cookie
+monster seems to be right. We will track setVar more carefully
+to have faster datastore operations."
+
+This is a trade-off between speed and memory again but
+the speed is more critical here.
+"""
+
+# Copyright (C) 2003, 2004  Chris Larson
+# Copyright (C) 2005        Holger Hans Peter Freyther
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Based on functions from the base bb module, Copyright 2003 Holger Schurig
+
+import sys, os, re
+import hashlib
+from itertools import groupby
+
+from bb import data_smart
+from bb import codeparser
+import bb
+
+logger = data_smart.logger
+_dict_type = data_smart.DataSmart
+
+def init():
+    """Return a new object representing the Bitbake data"""
+    return _dict_type()
+
+def init_db(parent = None):
+    """Return a new object representing the Bitbake data,
+    optionally based on an existing object"""
+    if parent is not None:
+        return parent.createCopy()
+    else:
+        return _dict_type()
+
+def createCopy(source):
+    """Link the source set to the destination
+    If one does not find the value in the destination set,
+    search will go on to the source set to get the value.
+    Value from source are copy-on-write. i.e. any try to
+    modify one of them will end up putting the modified value
+    in the destination set.
+    """
+    return source.createCopy()
+
+def initVar(var, d):
+    """Non-destructive var init for data structure"""
+    d.initVar(var)
+
+def keys(d):
+    """Return a list of keys in d"""
+    return d.keys()
+
+def expand(s, d, varname = None):
+    """Variable expansion using the data store"""
+    return d.expand(s, varname)
+
+def expandKeys(alterdata, readdata = None):
+    if readdata is None:
+        readdata = alterdata
+
+    todolist = {}
+    for key in alterdata:
+        if not '${' in key:
+            continue
+
+        ekey = expand(key, readdata)
+        if key == ekey:
+            continue
+        todolist[key] = ekey
+
+    # These two for loops are split for performance to maximise the
+    # usefulness of the expand cache
+    for key in sorted(todolist):
+        ekey = todolist[key]
+        newval = alterdata.getVar(ekey, False)
+        if newval is not None:
+            val = alterdata.getVar(key, False)
+            if val is not None:
+                bb.warn("Variable key %s (%s) replaces original key %s (%s)." % (key, val, ekey, newval))
+        alterdata.renameVar(key, ekey)
+
+def inheritFromOS(d, savedenv, permitted):
+    """Inherit variables from the initial environment."""
+    exportlist = bb.utils.preserved_envvars_exported()
+    for s in savedenv.keys():
+        if s in permitted:
+            try:
+                d.setVar(s, savedenv.getVar(s), op = 'from env')
+                if s in exportlist:
+                    d.setVarFlag(s, "export", True, op = 'auto env export')
+            except TypeError:
+                pass
+
+def emit_var(var, o=sys.__stdout__, d = init(), all=False):
+    """Emit a variable to be sourced by a shell."""
+    func = d.getVarFlag(var, "func", False)
+    if d.getVarFlag(var, 'python', False) and func:
+        return False
+
+    export = bb.utils.to_boolean(d.getVarFlag(var, "export"))
+    unexport = bb.utils.to_boolean(d.getVarFlag(var, "unexport"))
+    if not all and not export and not unexport and not func:
+        return False
+
+    try:
+        if all:
+            oval = d.getVar(var, False)
+        val = d.getVar(var)
+    except (KeyboardInterrupt):
+        raise
+    except Exception as exc:
+        o.write('# expansion of %s threw %s: %s\n' % (var, exc.__class__.__name__, str(exc)))
+        return False
+
+    if all:
+        d.varhistory.emit(var, oval, val, o, d)
+
+    if (var.find("-") != -1 or var.find(".") != -1 or var.find('{') != -1 or var.find('}') != -1 or var.find('+') != -1) and not all:
+        return False
+
+    varExpanded = d.expand(var)
+
+    if unexport:
+        o.write('unset %s\n' % varExpanded)
+        return False
+
+    if val is None:
+        return False
+
+    val = str(val)
+
+    if varExpanded.startswith("BASH_FUNC_"):
+        varExpanded = varExpanded[10:-2]
+        val = val[3:] # Strip off "() "
+        o.write("%s() %s\n" % (varExpanded, val))
+        o.write("export -f %s\n" % (varExpanded))
+        return True
+
+    if func:
+        # Write a comment indicating where the shell function came from (line number and filename) to make it easier
+        # for the user to diagnose task failures. This comment is also used by build.py to determine the metadata
+        # location of shell functions.
+        o.write("# line: {0}, file: {1}\n".format(
+            d.getVarFlag(var, "lineno", False),
+            d.getVarFlag(var, "filename", False)))
+        # NOTE: should probably check for unbalanced {} within the var
+        val = val.rstrip('\n')
+        o.write("%s() {\n%s\n}\n" % (varExpanded, val))
+        return 1
+
+    if export:
+        o.write('export ')
+
+    # if we're going to output this within doublequotes,
+    # to a shell, we need to escape the quotes in the var
+    alter = re.sub('"', '\\"', val)
+    alter = re.sub('\n', ' \\\n', alter)
+    alter = re.sub('\\$', '\\\\$', alter)
+    o.write('%s="%s"\n' % (varExpanded, alter))
+    return False
+
+def emit_env(o=sys.__stdout__, d = init(), all=False):
+    """Emits all items in the data store in a format such that it can be sourced by a shell."""
+
+    isfunc = lambda key: bool(d.getVarFlag(key, "func", False))
+    keys = sorted((key for key in d.keys() if not key.startswith("__")), key=isfunc)
+    grouped = groupby(keys, isfunc)
+    for isfunc, keys in grouped:
+        for key in sorted(keys):
+            emit_var(key, o, d, all and not isfunc) and o.write('\n')
+
+def exported_keys(d):
+    return (key for key in d.keys() if not key.startswith('__') and
+                                      bb.utils.to_boolean(d.getVarFlag(key, 'export')) and
+                                      not bb.utils.to_boolean(d.getVarFlag(key, 'unexport')))
+
+def exported_vars(d):
+    k = list(exported_keys(d))
+    for key in k:
+        try:
+            value = d.getVar(key)
+        except Exception as err:
+            bb.warn("%s: Unable to export ${%s}: %s" % (d.getVar("FILE"), key, err))
+            continue
+
+        if value is not None:
+            yield key, str(value)
+
+def emit_func(func, o=sys.__stdout__, d = init()):
+    """Emits all items in the data store in a format such that it can be sourced by a shell."""
+
+    keys = (key for key in d.keys() if not key.startswith("__") and not d.getVarFlag(key, "func", False))
+    for key in sorted(keys):
+        emit_var(key, o, d, False)
+
+    o.write('\n')
+    emit_var(func, o, d, False) and o.write('\n')
+    newdeps = bb.codeparser.ShellParser(func, logger).parse_shell(d.getVar(func))
+    newdeps |= set((d.getVarFlag(func, "vardeps") or "").split())
+    seen = set()
+    while newdeps:
+        deps = newdeps
+        seen |= deps
+        newdeps = set()
+        for dep in sorted(deps):
+            if d.getVarFlag(dep, "func", False) and not d.getVarFlag(dep, "python", False):
+               emit_var(dep, o, d, False) and o.write('\n')
+               newdeps |=  bb.codeparser.ShellParser(dep, logger).parse_shell(d.getVar(dep))
+               newdeps |= set((d.getVarFlag(dep, "vardeps") or "").split())
+        newdeps -= seen
+
+_functionfmt = """
+def {function}(d):
+{body}"""
+
+def emit_func_python(func, o=sys.__stdout__, d = init()):
+    """Emits all items in the data store in a format such that it can be sourced by a shell."""
+
+    def write_func(func, o, call = False):
+        body = d.getVar(func, False)
+        if not body.startswith("def"):
+            body = _functionfmt.format(function=func, body=body)
+
+        o.write(body.strip() + "\n\n")
+        if call:
+            o.write(func + "(d)" + "\n\n")
+
+    write_func(func, o, True)
+    pp = bb.codeparser.PythonParser(func, logger)
+    pp.parse_python(d.getVar(func, False))
+    newdeps = pp.execs
+    newdeps |= set((d.getVarFlag(func, "vardeps") or "").split())
+    seen = set()
+    while newdeps:
+        deps = newdeps
+        seen |= deps
+        newdeps = set()
+        for dep in deps:
+            if d.getVarFlag(dep, "func", False) and d.getVarFlag(dep, "python", False):
+               write_func(dep, o)
+               pp = bb.codeparser.PythonParser(dep, logger)
+               pp.parse_python(d.getVar(dep, False))
+               newdeps |= pp.execs
+               newdeps |= set((d.getVarFlag(dep, "vardeps") or "").split())
+        newdeps -= seen
+
+def build_dependencies(key, keys, mod_funcs, shelldeps, varflagsexcl, ignored_vars, d, codeparsedata):
+    def handle_contains(value, contains, exclusions, d):
+        newvalue = []
+        if value:
+            newvalue.append(str(value))
+        for k in sorted(contains):
+            if k in exclusions or k in ignored_vars:
+                continue
+            l = (d.getVar(k) or "").split()
+            for item in sorted(contains[k]):
+                for word in item.split():
+                    if not word in l:
+                        newvalue.append("\n%s{%s} = Unset" % (k, item))
+                        break
+                else:
+                    newvalue.append("\n%s{%s} = Set" % (k, item))
+        return "".join(newvalue)
+
+    def handle_remove(value, deps, removes, d):
+        for r in sorted(removes):
+            r2 = d.expandWithRefs(r, None)
+            value += "\n_remove of %s" % r
+            deps |= r2.references
+            deps = deps | (keys & r2.execs)
+        return value
+
+    deps = set()
+    try:
+        if key in mod_funcs:
+            exclusions = set()
+            moddep = bb.codeparser.modulecode_deps[key]
+            value = handle_contains("", moddep[3], exclusions, d)
+            return frozenset((moddep[0] | keys & moddep[1]) - ignored_vars), value
+
+        if key[-1] == ']':
+            vf = key[:-1].split('[')
+            if vf[1] == "vardepvalueexclude":
+                return deps, ""
+            value, parser = d.getVarFlag(vf[0], vf[1], False, retparser=True)
+            deps |= parser.references
+            deps = deps | (keys & parser.execs)
+            deps -= ignored_vars
+            return frozenset(deps), value
+        varflags = d.getVarFlags(key, ["vardeps", "vardepvalue", "vardepsexclude", "exports", "postfuncs", "prefuncs", "lineno", "filename"]) or {}
+        vardeps = varflags.get("vardeps")
+        exclusions = varflags.get("vardepsexclude", "").split()
+
+        if "vardepvalue" in varflags:
+            value = varflags.get("vardepvalue")
+        elif varflags.get("func"):
+            if varflags.get("python"):
+                value = codeparsedata.getVarFlag(key, "_content", False)
+                parser = bb.codeparser.PythonParser(key, logger)
+                parser.parse_python(value, filename=varflags.get("filename"), lineno=varflags.get("lineno"))
+                deps = deps | parser.references
+                deps = deps | (keys & parser.execs)
+                value = handle_contains(value, parser.contains, exclusions, d)
+            else:
+                value, parsedvar = codeparsedata.getVarFlag(key, "_content", False, retparser=True)
+                parser = bb.codeparser.ShellParser(key, logger)
+                parser.parse_shell(parsedvar.value)
+                deps = deps | shelldeps
+                deps = deps | parsedvar.references
+                deps = deps | (keys & parser.execs) | (keys & parsedvar.execs)
+                value = handle_contains(value, parsedvar.contains, exclusions, d)
+                if hasattr(parsedvar, "removes"):
+                    value = handle_remove(value, deps, parsedvar.removes, d)
+            if vardeps is None:
+                parser.log.flush()
+            if "prefuncs" in varflags:
+                deps = deps | set(varflags["prefuncs"].split())
+            if "postfuncs" in varflags:
+                deps = deps | set(varflags["postfuncs"].split())
+            if "exports" in varflags:
+                deps = deps | set(varflags["exports"].split())
+        else:
+            value, parser = d.getVarFlag(key, "_content", False, retparser=True)
+            deps |= parser.references
+            deps = deps | (keys & parser.execs)
+            value = handle_contains(value, parser.contains, exclusions, d)
+            if hasattr(parser, "removes"):
+                value = handle_remove(value, deps, parser.removes, d)
+
+        if "vardepvalueexclude" in varflags:
+            exclude = varflags.get("vardepvalueexclude")
+            for excl in exclude.split('|'):
+                if excl:
+                    value = value.replace(excl, '')
+
+        # Add varflags, assuming an exclusion list is set
+        if varflagsexcl:
+            varfdeps = []
+            for f in varflags:
+                if f not in varflagsexcl:
+                    varfdeps.append('%s[%s]' % (key, f))
+            if varfdeps:
+                deps |= set(varfdeps)
+
+        deps |= set((vardeps or "").split())
+        deps -= set(exclusions)
+        deps -= ignored_vars
+    except bb.parse.SkipRecipe:
+        raise
+    except Exception as e:
+        bb.warn("Exception during build_dependencies for %s" % key)
+        raise
+    return frozenset(deps), value
+    #bb.note("Variable %s references %s and calls %s" % (key, str(deps), str(execs)))
+    #d.setVarFlag(key, "vardeps", deps)
+
+def generate_dependencies(d, ignored_vars):
+
+    mod_funcs = set(bb.codeparser.modulecode_deps.keys())
+    keys = set(key for key in d if not key.startswith("__")) | mod_funcs
+    shelldeps = set(key for key in d.getVar("__exportlist", False) if bb.utils.to_boolean(d.getVarFlag(key, "export")) and not bb.utils.to_boolean(d.getVarFlag(key, "unexport")))
+    varflagsexcl = d.getVar('BB_SIGNATURE_EXCLUDE_FLAGS')
+
+    codeparserd = d.createCopy()
+    for forced in (d.getVar('BB_HASH_CODEPARSER_VALS') or "").split():
+        key, value = forced.split("=", 1)
+        codeparserd.setVar(key, value)
+
+    deps = {}
+    values = {}
+
+    tasklist = d.getVar('__BBTASKS', False) or []
+    for task in tasklist:
+        deps[task], values[task] = build_dependencies(task, keys, mod_funcs, shelldeps, varflagsexcl, ignored_vars, d, codeparserd)
+        newdeps = deps[task]
+        seen = set()
+        while newdeps:
+            nextdeps = newdeps
+            seen |= nextdeps
+            newdeps = set()
+            for dep in nextdeps:
+                if dep not in deps:
+                    deps[dep], values[dep] = build_dependencies(dep, keys, mod_funcs, shelldeps, varflagsexcl, ignored_vars, d, codeparserd)
+                newdeps |=  deps[dep]
+            newdeps -= seen
+        #print "For %s: %s" % (task, str(deps[task]))
+    return tasklist, deps, values
+
+def generate_dependency_hash(tasklist, gendeps, lookupcache, ignored_vars, fn):
+    taskdeps = {}
+    basehash = {}
+
+    for task in tasklist:
+        data = lookupcache[task]
+
+        if data is None:
+            bb.error("Task %s from %s seems to be empty?!" % (task, fn))
+            data = []
+        else:
+            data = [data]
+
+        newdeps = gendeps[task]
+        seen = set()
+        while newdeps:
+            nextdeps = newdeps
+            seen |= nextdeps
+            newdeps = set()
+            for dep in nextdeps:
+                newdeps |= gendeps[dep]
+            newdeps -= seen
+
+        alldeps = sorted(seen)
+        for dep in alldeps:
+            data.append(dep)
+            var = lookupcache[dep]
+            if var is not None:
+                data.append(str(var))
+        k = fn + ":" + task
+        basehash[k] = hashlib.sha256("".join(data).encode("utf-8")).hexdigest()
+        taskdeps[task] = frozenset(seen)
+
+    return taskdeps, basehash
+
+def inherits_class(klass, d):
+    val = d.getVar('__inherit_cache', False) or []
+    needle = '/%s.bbclass' % klass
+    for v in val:
+        if v.endswith(needle):
+            return True
+    return False

bitbake/lib/bb/event.py

@@ -0,0 +1,866 @@
+"""
+BitBake 'Event' implementation
+
+Classes and functions for manipulating 'events' in the
+BitBake build tools.
+"""
+
+# Copyright (C) 2003, 2004  Chris Larson
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import ast
+import atexit
+import collections
+import logging
+import pickle
+import sys
+import threading
+import traceback
+
+import bb.exceptions
+import bb.utils
+
+# This is the pid for which we should generate the event. This is set when
+# the runqueue forks off.
+worker_pid = 0
+worker_fire = None
+
+logger = logging.getLogger('BitBake.Event')
+
+class Event(object):
+    """Base class for events"""
+
+    def __init__(self):
+        self.pid = worker_pid
+
+
+class HeartbeatEvent(Event):
+    """Triggered at regular time intervals of 10 seconds. Other events can fire much more often
+       (runQueueTaskStarted when there are many short tasks) or not at all for long periods
+       of time (again runQueueTaskStarted, when there is just one long-running task), so this
+       event is more suitable for doing some task-independent work occasionally."""
+    def __init__(self, time):
+        Event.__init__(self)
+        self.time = time
+
+Registered        = 10
+AlreadyRegistered = 14
+
+def get_class_handlers():
+    return _handlers
+
+def set_class_handlers(h):
+    global _handlers
+    _handlers = h
+
+def clean_class_handlers():
+    return collections.OrderedDict()
+
+# Internal
+_handlers = clean_class_handlers()
+_ui_handlers = {}
+_ui_logfilters = {}
+_ui_handler_seq = 0
+_event_handler_map = {}
+_catchall_handlers = {}
+_eventfilter = None
+_uiready = False
+_thread_lock = threading.Lock()
+_heartbeat_enabled = False
+_should_exit = threading.Event()
+
+def enable_threadlock():
+    # Always needed now
+    return
+
+def disable_threadlock():
+    # Always needed now
+    return
+
+def enable_heartbeat():
+    global _heartbeat_enabled
+    _heartbeat_enabled = True
+
+def disable_heartbeat():
+    global _heartbeat_enabled
+    _heartbeat_enabled = False
+
+#
+# In long running code, this function should be called periodically
+# to check if we should exit due to an interuption (.e.g Ctrl+C from the UI)
+#
+def check_for_interrupts(d):
+    global _should_exit
+    if _should_exit.is_set():
+        bb.warn("Exiting due to interrupt.")
+        raise bb.BBHandledException()
+
+def execute_handler(name, handler, event, d):
+    event.data = d
+    try:
+        ret = handler(event, d)
+    except (bb.parse.SkipRecipe, bb.BBHandledException):
+        raise
+    except Exception:
+        etype, value, tb = sys.exc_info()
+        logger.error("Execution of event handler '%s' failed" % name,
+                        exc_info=(etype, value, tb.tb_next))
+        raise
+    except SystemExit as exc:
+        if exc.code != 0:
+            logger.error("Execution of event handler '%s' failed" % name)
+        raise
+    finally:
+        del event.data
+
+
+def fire_class_handlers(event, d):
+    if isinstance(event, logging.LogRecord):
+        return
+
+    eid = str(event.__class__)[8:-2]
+    evt_hmap = _event_handler_map.get(eid, {})
+    for name, handler in list(_handlers.items()):
+        if name in _catchall_handlers or name in evt_hmap:
+            if _eventfilter:
+                if not _eventfilter(name, handler, event, d):
+                    continue
+            if d is not None and not name in (d.getVar("__BBHANDLERS_MC") or set()):
+                continue
+            execute_handler(name, handler, event, d)
+
+ui_queue = []
+@atexit.register
+def print_ui_queue():
+    global ui_queue
+    """If we're exiting before a UI has been spawned, display any queued
+    LogRecords to the console."""
+    logger = logging.getLogger("BitBake")
+    if not _uiready:
+        from bb.msg import BBLogFormatter
+        # Flush any existing buffered content
+        try:
+            sys.stdout.flush()
+        except:
+            pass
+        try:
+            sys.stderr.flush()
+        except:
+            pass
+        stdout = logging.StreamHandler(sys.stdout)
+        stderr = logging.StreamHandler(sys.stderr)
+        formatter = BBLogFormatter("%(levelname)s: %(message)s")
+        stdout.setFormatter(formatter)
+        stderr.setFormatter(formatter)
+
+        # First check to see if we have any proper messages
+        msgprint = False
+        msgerrs = False
+
+        # Should we print to stderr?
+        for event in ui_queue[:]:
+            if isinstance(event, logging.LogRecord) and event.levelno >= logging.WARNING:
+                msgerrs = True
+                break
+
+        if msgerrs:
+            logger.addHandler(stderr)
+        else:
+            logger.addHandler(stdout)
+
+        for event in ui_queue[:]:
+            if isinstance(event, logging.LogRecord):
+                if event.levelno > logging.DEBUG:
+                    logger.handle(event)
+                    msgprint = True
+
+        # Nope, so just print all of the messages we have (including debug messages)
+        if not msgprint:
+            for event in ui_queue[:]:
+                if isinstance(event, logging.LogRecord):
+                    logger.handle(event)
+        if msgerrs:
+            logger.removeHandler(stderr)
+        else:
+            logger.removeHandler(stdout)
+        ui_queue = []
+
+def fire_ui_handlers(event, d):
+    global _thread_lock
+
+    if not _uiready:
+        # No UI handlers registered yet, queue up the messages
+        ui_queue.append(event)
+        return
+
+    with bb.utils.lock_timeout(_thread_lock):
+        errors = []
+        for h in _ui_handlers:
+            #print "Sending event %s" % event
+            try:
+                 if not _ui_logfilters[h].filter(event):
+                     continue
+                 # We use pickle here since it better handles object instances
+                 # which xmlrpc's marshaller does not. Events *must* be serializable
+                 # by pickle.
+                 if hasattr(_ui_handlers[h].event, "sendpickle"):
+                    _ui_handlers[h].event.sendpickle((pickle.dumps(event)))
+                 else:
+                    _ui_handlers[h].event.send(event)
+            except:
+                errors.append(h)
+        for h in errors:
+            del _ui_handlers[h]
+
+def fire(event, d):
+    """Fire off an Event"""
+
+    # We can fire class handlers in the worker process context and this is
+    # desired so they get the task based datastore.
+    # UI handlers need to be fired in the server context so we defer this. They
+    # don't have a datastore so the datastore context isn't a problem.
+
+    fire_class_handlers(event, d)
+    if worker_fire:
+        worker_fire(event, d)
+    else:
+        # If messages have been queued up, clear the queue
+        global _uiready, ui_queue
+        if _uiready and ui_queue:
+            for queue_event in ui_queue:
+                fire_ui_handlers(queue_event, d)
+            ui_queue = []
+        fire_ui_handlers(event, d)
+
+def fire_from_worker(event, d):
+    fire_ui_handlers(event, d)
+
+noop = lambda _: None
+def register(name, handler, mask=None, filename=None, lineno=None, data=None):
+    """Register an Event handler"""
+
+    if data is not None and data.getVar("BB_CURRENT_MC"):
+        mc = data.getVar("BB_CURRENT_MC")
+        name = '%s%s' % (mc.replace('-', '_'), name)
+
+    # already registered
+    if name in _handlers:
+        if data is not None:
+            bbhands_mc = (data.getVar("__BBHANDLERS_MC") or set())
+            bbhands_mc.add(name)
+            data.setVar("__BBHANDLERS_MC", bbhands_mc)
+        return AlreadyRegistered
+
+    if handler is not None:
+        # handle string containing python code
+        if isinstance(handler, str):
+            tmp = "def %s(e, d):\n%s" % (name, handler)
+            try:
+                code = bb.methodpool.compile_cache(tmp)
+                if not code:
+                    if filename is None:
+                        filename = "%s(e, d)" % name
+                    code = compile(tmp, filename, "exec", ast.PyCF_ONLY_AST)
+                    if lineno is not None:
+                        ast.increment_lineno(code, lineno-1)
+                    code = compile(code, filename, "exec")
+                    bb.methodpool.compile_cache_add(tmp, code)
+            except SyntaxError:
+                logger.error("Unable to register event handler '%s':\n%s", name,
+                             ''.join(traceback.format_exc(limit=0)))
+                _handlers[name] = noop
+                return
+            env = {}
+            bb.utils.better_exec(code, env)
+            func = bb.utils.better_eval(name, env)
+            _handlers[name] = func
+        else:
+            _handlers[name] = handler
+
+        if not mask or '*' in mask:
+            _catchall_handlers[name] = True
+        else:
+            for m in mask:
+                if _event_handler_map.get(m, None) is None:
+                    _event_handler_map[m] = {}
+                _event_handler_map[m][name] = True
+
+        if data is not None:
+            bbhands_mc = (data.getVar("__BBHANDLERS_MC") or set())
+            bbhands_mc.add(name)
+            data.setVar("__BBHANDLERS_MC", bbhands_mc)
+
+        return Registered
+
+def remove(name, handler, data=None):
+    """Remove an Event handler"""
+    if data is not None:
+        if data.getVar("BB_CURRENT_MC"):
+            mc = data.getVar("BB_CURRENT_MC")
+            name = '%s%s' % (mc.replace('-', '_'), name)
+
+    _handlers.pop(name)
+    if name in _catchall_handlers:
+        _catchall_handlers.pop(name)
+    for event in _event_handler_map.keys():
+        if name in _event_handler_map[event]:
+            _event_handler_map[event].pop(name)
+
+    if data is not None:
+        bbhands_mc = (data.getVar("__BBHANDLERS_MC") or set())
+        if name in bbhands_mc:
+            bbhands_mc.remove(name)
+            data.setVar("__BBHANDLERS_MC", bbhands_mc)
+
+def get_handlers():
+    return _handlers
+
+def set_handlers(handlers):
+    global _handlers
+    _handlers = handlers
+
+def set_eventfilter(func):
+    global _eventfilter
+    _eventfilter = func
+
+def register_UIHhandler(handler, mainui=False):
+    with bb.utils.lock_timeout(_thread_lock):
+        bb.event._ui_handler_seq = bb.event._ui_handler_seq + 1
+        _ui_handlers[_ui_handler_seq] = handler
+        level, debug_domains = bb.msg.constructLogOptions()
+        _ui_logfilters[_ui_handler_seq] = UIEventFilter(level, debug_domains)
+        if mainui:
+            global _uiready
+            _uiready = _ui_handler_seq
+        return _ui_handler_seq
+
+def unregister_UIHhandler(handlerNum, mainui=False):
+    if mainui:
+        global _uiready
+        _uiready = False
+    with bb.utils.lock_timeout(_thread_lock):
+        if handlerNum in _ui_handlers:
+            del _ui_handlers[handlerNum]
+    return
+
+def get_uihandler():
+    if _uiready is False:
+        return None
+    return _uiready
+
+# Class to allow filtering of events and specific filtering of LogRecords *before* we put them over the IPC
+class UIEventFilter(object):
+    def __init__(self, level, debug_domains):
+        self.update(None, level, debug_domains)
+
+    def update(self, eventmask, level, debug_domains):
+        self.eventmask = eventmask
+        self.stdlevel = level
+        self.debug_domains = debug_domains
+
+    def filter(self, event):
+        if isinstance(event, logging.LogRecord):
+            if event.levelno >= self.stdlevel:
+                return True
+            if event.name in self.debug_domains and event.levelno >= self.debug_domains[event.name]:
+                return True
+            return False
+        eid = str(event.__class__)[8:-2]
+        if self.eventmask and eid not in self.eventmask:
+            return False
+        return True
+
+def set_UIHmask(handlerNum, level, debug_domains, mask):
+    if not handlerNum in _ui_handlers:
+        return False
+    if '*' in mask:
+        _ui_logfilters[handlerNum].update(None, level, debug_domains)
+    else:
+        _ui_logfilters[handlerNum].update(mask, level, debug_domains)
+    return True
+
+def getName(e):
+    """Returns the name of a class or class instance"""
+    if getattr(e, "__name__", None) is None:
+        return e.__class__.__name__
+    else:
+        return e.__name__
+
+class OperationStarted(Event):
+    """An operation has begun"""
+    def __init__(self, msg = "Operation Started"):
+        Event.__init__(self)
+        self.msg = msg
+
+class OperationCompleted(Event):
+    """An operation has completed"""
+    def __init__(self, total, msg = "Operation Completed"):
+        Event.__init__(self)
+        self.total = total
+        self.msg = msg
+
+class OperationProgress(Event):
+    """An operation is in progress"""
+    def __init__(self, current, total, msg = "Operation in Progress"):
+        Event.__init__(self)
+        self.current = current
+        self.total = total
+        self.msg = msg + ": %s/%s" % (current, total);
+
+class ConfigParsed(Event):
+    """Configuration Parsing Complete"""
+
+class MultiConfigParsed(Event):
+    """Multi-Config Parsing Complete"""
+    def __init__(self, mcdata):
+        self.mcdata = mcdata
+        Event.__init__(self)
+
+class RecipeEvent(Event):
+    def __init__(self, fn):
+        self.fn = fn
+        Event.__init__(self)
+
+class RecipePreFinalise(RecipeEvent):
+    """ Recipe Parsing Complete but not yet finalised"""
+
+class RecipePostKeyExpansion(RecipeEvent):
+    """ Recipe Parsing Complete but not yet finalised"""
+
+
+class RecipeTaskPreProcess(RecipeEvent):
+    """
+    Recipe Tasks about to be finalised
+    The list of tasks should be final at this point and handlers
+    are only able to change interdependencies
+    """
+    def __init__(self, fn, tasklist):
+        self.fn = fn
+        self.tasklist = tasklist
+        Event.__init__(self)
+
+class RecipeParsed(RecipeEvent):
+    """ Recipe Parsing Complete """
+
+class BuildBase(Event):
+    """Base class for bitbake build events"""
+
+    def __init__(self, n, p, failures = 0):
+        self._name = n
+        self._pkgs = p
+        Event.__init__(self)
+        self._failures = failures
+
+    def getPkgs(self):
+        return self._pkgs
+
+    def setPkgs(self, pkgs):
+        self._pkgs = pkgs
+
+    def getName(self):
+        return self._name
+
+    def setName(self, name):
+        self._name = name
+
+    def getFailures(self):
+        """
+        Return the number of failed packages
+        """
+        return self._failures
+
+    pkgs = property(getPkgs, setPkgs, None, "pkgs property")
+    name = property(getName, setName, None, "name property")
+
+class BuildInit(BuildBase):
+    """buildFile or buildTargets was invoked"""
+    def __init__(self, p=[]):
+        name = None
+        BuildBase.__init__(self, name, p)
+
+class BuildStarted(BuildBase, OperationStarted):
+    """Event when builds start"""
+    def __init__(self, n, p, failures = 0):
+        OperationStarted.__init__(self, "Building Started")
+        BuildBase.__init__(self, n, p, failures)
+
+class BuildCompleted(BuildBase, OperationCompleted):
+    """Event when builds have completed"""
+    def __init__(self, total, n, p, failures=0, interrupted=0):
+        if not failures:
+            OperationCompleted.__init__(self, total, "Building Succeeded")
+        else:
+            OperationCompleted.__init__(self, total, "Building Failed")
+        self._interrupted = interrupted
+        BuildBase.__init__(self, n, p, failures)
+
+class DiskFull(Event):
+    """Disk full case build halted"""
+    def __init__(self, dev, type, freespace, mountpoint):
+        Event.__init__(self)
+        self._dev = dev
+        self._type = type
+        self._free = freespace
+        self._mountpoint = mountpoint
+
+class DiskUsageSample:
+    def __init__(self, available_bytes, free_bytes, total_bytes):
+        # Number of bytes available to non-root processes.
+        self.available_bytes = available_bytes
+        # Number of bytes available to root processes.
+        self.free_bytes = free_bytes
+        # Total capacity of the volume.
+        self.total_bytes = total_bytes
+
+class MonitorDiskEvent(Event):
+    """If BB_DISKMON_DIRS is set, then this event gets triggered each time disk space is checked.
+       Provides information about devices that are getting monitored."""
+    def __init__(self, disk_usage):
+        Event.__init__(self)
+        # hash of device root path -> DiskUsageSample
+        self.disk_usage = disk_usage
+
+class NoProvider(Event):
+    """No Provider for an Event"""
+
+    def __init__(self, item, runtime=False, dependees=None, reasons=None, close_matches=None):
+        Event.__init__(self)
+        self._item = item
+        self._runtime = runtime
+        self._dependees = dependees
+        self._reasons = reasons
+        self._close_matches = close_matches
+
+    def getItem(self):
+        return self._item
+
+    def isRuntime(self):
+        return self._runtime
+
+    def __str__(self):
+        msg = ''
+        if self._runtime:
+            r = "R"
+        else:
+            r = ""
+
+        extra = ''
+        if not self._reasons:
+            if self._close_matches:
+                extra = ". Close matches:\n  %s" % '\n  '.join(sorted(set(self._close_matches)))
+
+        if self._dependees:
+            msg = "Nothing %sPROVIDES '%s' (but %s %sDEPENDS on or otherwise requires it)%s" % (r, self._item, ", ".join(self._dependees), r, extra)
+        else:
+            msg = "Nothing %sPROVIDES '%s'%s" % (r, self._item, extra)
+        if self._reasons:
+            for reason in self._reasons:
+                msg += '\n' + reason
+        return msg
+
+
+class MultipleProviders(Event):
+    """Multiple Providers"""
+
+    def  __init__(self, item, candidates, runtime = False):
+        Event.__init__(self)
+        self._item = item
+        self._candidates = candidates
+        self._is_runtime = runtime
+
+    def isRuntime(self):
+        """
+        Is this a runtime issue?
+        """
+        return self._is_runtime
+
+    def getItem(self):
+        """
+        The name for the to be build item
+        """
+        return self._item
+
+    def getCandidates(self):
+        """
+        Get the possible Candidates for a PROVIDER.
+        """
+        return self._candidates
+
+    def __str__(self):
+        msg = "Multiple providers are available for %s%s (%s)" % (self._is_runtime and "runtime " or "",
+                            self._item,
+                            ", ".join(self._candidates))
+        rtime = ""
+        if self._is_runtime:
+            rtime = "R"
+        msg += "\nConsider defining a PREFERRED_%sPROVIDER entry to match %s" % (rtime, self._item)
+        return msg
+
+class ParseStarted(OperationStarted):
+    """Recipe parsing for the runqueue has begun"""
+    def __init__(self, total):
+        OperationStarted.__init__(self, "Recipe parsing Started")
+        self.total = total
+
+class ParseCompleted(OperationCompleted):
+    """Recipe parsing for the runqueue has completed"""
+    def __init__(self, cached, parsed, skipped, masked, virtuals, errors, total):
+        OperationCompleted.__init__(self, total, "Recipe parsing Completed")
+        self.cached = cached
+        self.parsed = parsed
+        self.skipped = skipped
+        self.virtuals = virtuals
+        self.masked = masked
+        self.errors = errors
+        self.sofar = cached + parsed
+
+class ParseProgress(OperationProgress):
+    """Recipe parsing progress"""
+    def __init__(self, current, total):
+        OperationProgress.__init__(self, current, total, "Recipe parsing")
+
+
+class CacheLoadStarted(OperationStarted):
+    """Loading of the dependency cache has begun"""
+    def __init__(self, total):
+        OperationStarted.__init__(self, "Loading cache Started")
+        self.total = total
+
+class CacheLoadProgress(OperationProgress):
+    """Cache loading progress"""
+    def __init__(self, current, total):
+        OperationProgress.__init__(self, current, total, "Loading cache")
+
+class CacheLoadCompleted(OperationCompleted):
+    """Cache loading is complete"""
+    def __init__(self, total, num_entries):
+        OperationCompleted.__init__(self, total, "Loading cache Completed")
+        self.num_entries = num_entries
+
+class TreeDataPreparationStarted(OperationStarted):
+    """Tree data preparation started"""
+    def __init__(self):
+        OperationStarted.__init__(self, "Preparing tree data Started")
+
+class TreeDataPreparationProgress(OperationProgress):
+    """Tree data preparation is in progress"""
+    def __init__(self, current, total):
+        OperationProgress.__init__(self, current, total, "Preparing tree data")
+
+class TreeDataPreparationCompleted(OperationCompleted):
+    """Tree data preparation completed"""
+    def __init__(self, total):
+        OperationCompleted.__init__(self, total, "Preparing tree data Completed")
+
+class DepTreeGenerated(Event):
+    """
+    Event when a dependency tree has been generated
+    """
+
+    def __init__(self, depgraph):
+        Event.__init__(self)
+        self._depgraph = depgraph
+
+class TargetsTreeGenerated(Event):
+    """
+    Event when a set of buildable targets has been generated
+    """
+    def __init__(self, model):
+        Event.__init__(self)
+        self._model = model
+
+class ReachableStamps(Event):
+    """
+    An event listing all stamps reachable after parsing
+    which the metadata may use to clean up stale data
+    """
+
+    def __init__(self, stamps):
+        Event.__init__(self)
+        self.stamps = stamps
+
+class StaleSetSceneTasks(Event):
+    """
+    An event listing setscene tasks which are 'stale' and will
+    be rerun. The metadata may use to clean up stale data.
+    tasks is a mapping of tasks and matching stale stamps.
+    """
+
+    def __init__(self, tasks):
+        Event.__init__(self)
+        self.tasks = tasks
+
+class FilesMatchingFound(Event):
+    """
+    Event when a list of files matching the supplied pattern has
+    been generated
+    """
+    def __init__(self, pattern, matches):
+        Event.__init__(self)
+        self._pattern = pattern
+        self._matches = matches
+
+class ConfigFilesFound(Event):
+    """
+    Event when a list of appropriate config files has been generated
+    """
+    def __init__(self, variable, values):
+        Event.__init__(self)
+        self._variable = variable
+        self._values = values
+
+class ConfigFilePathFound(Event):
+    """
+    Event when a path for a config file has been found
+    """
+    def __init__(self, path):
+        Event.__init__(self)
+        self._path = path
+
+class MsgBase(Event):
+    """Base class for messages"""
+
+    def __init__(self, msg):
+        self._message = msg
+        Event.__init__(self)
+
+class MsgDebug(MsgBase):
+    """Debug Message"""
+
+class MsgNote(MsgBase):
+    """Note Message"""
+
+class MsgWarn(MsgBase):
+    """Warning Message"""
+
+class MsgError(MsgBase):
+    """Error Message"""
+
+class MsgFatal(MsgBase):
+    """Fatal Message"""
+
+class MsgPlain(MsgBase):
+    """General output"""
+
+class LogExecTTY(Event):
+    """Send event containing program to spawn on tty of the logger"""
+    def __init__(self, msg, prog, sleep_delay, retries):
+        Event.__init__(self)
+        self.msg = msg
+        self.prog = prog
+        self.sleep_delay = sleep_delay
+        self.retries = retries
+
+class LogHandler(logging.Handler):
+    """Dispatch logging messages as bitbake events"""
+
+    def emit(self, record):
+        if record.exc_info:
+            etype, value, tb = record.exc_info
+            if hasattr(tb, 'tb_next'):
+                tb = list(bb.exceptions.extract_traceback(tb, context=3))
+            # Need to turn the value into something the logging system can pickle
+            record.bb_exc_info = (etype, value, tb)
+            record.bb_exc_formatted = bb.exceptions.format_exception(etype, value, tb, limit=5)
+            value = str(value)
+            record.exc_info = None
+        fire(record, None)
+
+    def filter(self, record):
+        record.taskpid = worker_pid
+        return True
+
+class MetadataEvent(Event):
+    """
+    Generic event that target for OE-Core classes
+    to report information during asynchronous execution
+    """
+    def __init__(self, eventtype, eventdata):
+        Event.__init__(self)
+        self.type = eventtype
+        self._localdata = eventdata
+
+class ProcessStarted(Event):
+    """
+    Generic process started event (usually part of the initial startup)
+    where further progress events will be delivered
+    """
+    def __init__(self, processname, total):
+        Event.__init__(self)
+        self.processname = processname
+        self.total = total
+
+class ProcessProgress(Event):
+    """
+    Generic process progress event (usually part of the initial startup)
+    """
+    def __init__(self, processname, progress):
+        Event.__init__(self)
+        self.processname = processname
+        self.progress = progress
+
+class ProcessFinished(Event):
+    """
+    Generic process finished event (usually part of the initial startup)
+    """
+    def __init__(self, processname):
+        Event.__init__(self)
+        self.processname = processname
+
+class SanityCheck(Event):
+    """
+    Event to run sanity checks, either raise errors or generate events as return status.
+    """
+    def __init__(self, generateevents = True):
+        Event.__init__(self)
+        self.generateevents = generateevents
+
+class SanityCheckPassed(Event):
+    """
+    Event to indicate sanity check has passed
+    """
+
+class SanityCheckFailed(Event):
+    """
+    Event to indicate sanity check has failed
+    """
+    def __init__(self, msg, network_error=False):
+        Event.__init__(self)
+        self._msg = msg
+        self._network_error = network_error
+
+class NetworkTest(Event):
+    """
+    Event to run network connectivity tests, either raise errors or generate events as return status.
+    """
+    def __init__(self, generateevents = True):
+        Event.__init__(self)
+        self.generateevents = generateevents
+
+class NetworkTestPassed(Event):
+    """
+    Event to indicate network test has passed
+    """
+
+class NetworkTestFailed(Event):
+    """
+    Event to indicate network test has failed
+    """
+
+class FindSigInfoResult(Event):
+    """
+    Event to return results from findSigInfo command
+    """
+    def __init__(self, result):
+        Event.__init__(self)
+        self.result = result
+
+class ParseError(Event):
+    """
+    Event to indicate parse failed
+    """
+    def __init__(self, msg):
+        super().__init__()
+        self._msg = msg

bitbake/lib/bb/exceptions.py

@@ -0,0 +1,96 @@
+#
+# Copyright BitBake Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+import inspect
+import traceback
+import bb.namedtuple_with_abc
+from collections import namedtuple
+
+
+class TracebackEntry(namedtuple.abc):
+    """Pickleable representation of a traceback entry"""
+    _fields = 'filename lineno function args code_context index'
+    _header = '  File "{0.filename}", line {0.lineno}, in {0.function}{0.args}'
+
+    def format(self, formatter=None):
+        if not self.code_context:
+            return self._header.format(self) + '\n'
+
+        formatted = [self._header.format(self) + ':\n']
+
+        for lineindex, line in enumerate(self.code_context):
+            if formatter:
+                line = formatter(line)
+
+            if lineindex == self.index:
+                formatted.append('    >%s' % line)
+            else:
+                formatted.append('     %s' % line)
+        return formatted
+
+    def __str__(self):
+        return ''.join(self.format())
+
+def _get_frame_args(frame):
+    """Get the formatted arguments and class (if available) for a frame"""
+    arginfo = inspect.getargvalues(frame)
+
+    try:
+        if not arginfo.args:
+            return '', None
+    # There have been reports from the field of python 2.6 which doesn't 
+    # return a namedtuple here but simply a tuple so fallback gracefully if
+    # args isn't present.
+    except AttributeError:
+        return '', None
+
+    firstarg = arginfo.args[0]
+    if firstarg == 'self':
+        self = arginfo.locals['self']
+        cls = self.__class__.__name__
+
+        arginfo.args.pop(0)
+        del arginfo.locals['self']
+    else:
+        cls = None
+
+    formatted = inspect.formatargvalues(*arginfo)
+    return formatted, cls
+
+def extract_traceback(tb, context=1):
+    frames = inspect.getinnerframes(tb, context)
+    for frame, filename, lineno, function, code_context, index in frames:
+        formatted_args, cls = _get_frame_args(frame)
+        if cls:
+            function = '%s.%s' % (cls, function)
+        yield TracebackEntry(filename, lineno, function, formatted_args,
+                             code_context, index)
+
+def format_extracted(extracted, formatter=None, limit=None):
+    if limit:
+        extracted = extracted[-limit:]
+
+    formatted = []
+    for tracebackinfo in extracted:
+        formatted.extend(tracebackinfo.format(formatter))
+    return formatted
+
+
+def format_exception(etype, value, tb, context=1, limit=None, formatter=None):
+    formatted = ['Traceback (most recent call last):\n']
+
+    if hasattr(tb, 'tb_next'):
+        tb = extract_traceback(tb, context)
+
+    formatted.extend(format_extracted(tb, formatter, limit))
+    formatted.extend(traceback.format_exception_only(etype, value))
+    return formatted
+
+def to_string(exc):
+    if isinstance(exc, SystemExit):
+        if not isinstance(exc.code, str):
+            return 'Exited with "%d"' % exc.code
+    return str(exc)

bitbake/lib/bb/fetch2/README

@@ -0,0 +1,57 @@
+There are expectations of users of the fetcher code. This file attempts to document
+some of the constraints that are present. Some are obvious, some are less so. It is
+documented in the context of how OE uses it but the API calls are generic.
+
+a) network access for sources is only expected to happen in the do_fetch task.
+   This is not enforced or tested but is required so that we can:
+
+   i) audit the sources used (i.e. for license/manifest reasons) 
+   ii) support offline builds with a suitable cache
+   iii) allow work to continue even with downtime upstream
+   iv) allow for changes upstream in incompatible ways
+   v) allow rebuilding of the software in X years time
+
+b) network access is not expected in do_unpack task.
+
+c) you can take DL_DIR and use it as a mirror for offline builds.
+
+d) access to the network is only made when explicitly configured in recipes
+   (e.g. use of AUTOREV, or use of git tags which change revision).
+
+e) fetcher output is deterministic (i.e. if you fetch configuration XXX now it 
+   will match in future exactly in a clean build with a new DL_DIR).
+   One specific pain point example are git tags. They can be replaced and change
+   so the git fetcher has to resolve them with the network. We use git revisions
+   where possible to avoid this and ensure determinism.
+
+f) network access is expected to work with the standard linux proxy variables
+   so that access behind firewalls works (the fetcher sets these in the 
+   environment but only in the do_fetch tasks).
+
+g) access during parsing has to be minimal, a "git ls-remote" for an AUTOREV 
+   git recipe might be ok but you can't expect to checkout a git tree.
+
+h) we need to provide revision information during parsing such that a version
+   for the recipe can be constructed.
+
+i) versions are expected to be able to increase in a way which sorts allowing 
+   package feeds to operate (see PR server required for git revisions to sort).
+
+j) API to query for possible version upgrades of a url is highly desireable to 
+   allow our automated upgrage code to function (it is implied this does always 
+   have network access).
+
+k) Where fixes or changes to behaviour in the fetcher are made, we ask that 
+   test cases are added (run with "bitbake-selftest bb.tests.fetch"). We do 
+   have fairly extensive test coverage of the fetcher as it is the only way
+   to track all of its corner cases, it still doesn't give entire coverage 
+   though sadly.
+   
+l) If using tools during parse time, they will have to be in ASSUME_PROVIDED
+   in OE's context as we can't build git-native, then parse a recipe and use
+   git ls-remote.
+
+Not all fetchers support all features, autorev is optional and doesn't make
+sense for some. Upgrade detection means different things in different contexts
+too.
+

bitbake/lib/bb/fetch2/az.py

@@ -0,0 +1,93 @@
+"""
+BitBake 'Fetch' Azure Storage implementation
+
+"""
+
+# Copyright (C) 2021 Alejandro Hernandez Samaniego
+#
+# Based on bb.fetch2.wget:
+# Copyright (C) 2003, 2004  Chris Larson
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Based on functions from the base bb module, Copyright 2003 Holger Schurig
+
+import shlex
+import os
+import bb
+from   bb.fetch2 import FetchError
+from   bb.fetch2 import logger
+from   bb.fetch2.wget import Wget
+
+
+class Az(Wget):
+
+    def supports(self, ud, d):
+        """
+        Check to see if a given url can be fetched from Azure Storage
+        """
+        return ud.type in ['az']
+
+
+    def checkstatus(self, fetch, ud, d, try_again=True):
+
+        # checkstatus discards parameters either way, we need to do this before adding the SAS
+        ud.url = ud.url.replace('az://','https://').split(';')[0]
+
+        az_sas = d.getVar('AZ_SAS')
+        if az_sas and az_sas not in ud.url:
+            ud.url += az_sas
+
+        return Wget.checkstatus(self, fetch, ud, d, try_again)
+
+    # Override download method, include retries
+    def download(self, ud, d, retries=3):
+        """Fetch urls"""
+
+        # If were reaching the account transaction limit we might be refused a connection,
+        # retrying allows us to avoid false negatives since the limit changes over time
+        fetchcmd = self.basecmd + ' --retry-connrefused --waitretry=5'
+
+        # We need to provide a localpath to avoid wget using the SAS
+        # ud.localfile either has the downloadfilename or ud.path
+        localpath = os.path.join(d.getVar("DL_DIR"), ud.localfile)
+        bb.utils.mkdirhier(os.path.dirname(localpath))
+        fetchcmd += " -O %s" % shlex.quote(localpath)
+
+
+        if ud.user and ud.pswd:
+            fetchcmd += " --user=%s --password=%s --auth-no-challenge" % (ud.user, ud.pswd)
+
+        # Check if a Shared Access Signature was given and use it
+        az_sas = d.getVar('AZ_SAS')
+
+        if az_sas:
+            azuri = '%s%s%s%s' % ('https://', ud.host, ud.path, az_sas)
+        else:
+            azuri = '%s%s%s' % ('https://', ud.host, ud.path)
+
+        if os.path.exists(ud.localpath):
+            # file exists, but we didnt complete it.. trying again.
+            fetchcmd += d.expand(" -c -P ${DL_DIR} '%s'" % azuri)
+        else:
+            fetchcmd += d.expand(" -P ${DL_DIR} '%s'" % azuri)
+
+        try:
+            self._runwget(ud, d, fetchcmd, False)
+        except FetchError as e:
+            # Azure fails on handshake sometimes when using wget after some stress, producing a
+            # FetchError from the fetcher, if the artifact exists retyring should succeed
+            if 'Unable to establish SSL connection' in str(e):
+                logger.debug2('Unable to establish SSL connection: Retries remaining: %s, Retrying...' % retries)
+                self.download(ud, d, retries -1)
+
+        # Sanity check since wget can pretend it succeed when it didn't
+        # Also, this used to happen if sourceforge sent us to the mirror page
+        if not os.path.exists(ud.localpath):
+            raise FetchError("The fetch command returned success for url %s but %s doesn't exist?!" % (azuri, ud.localpath), azuri)
+
+        if os.path.getsize(ud.localpath) == 0:
+            os.remove(ud.localpath)
+            raise FetchError("The fetch of %s resulted in a zero size file?! Deleting and failing since this isn't right." % (azuri), azuri)
+
+        return True