d0b02cf801
Some distributions (namely Fedora Core 40) have started replacing
wget with wget2. There are some changes to wget2 that make it
incompatible with wget:
1. ftp/ftps is not supported anymore
2. progress 'dot' is not yet supported
3. Relative paths in -P and -O are not correctly dealt with
Item 1: Is already dealt with since Scarthgap by only adding the
option --passive-ftp when the URL specifies ftp/sftp. While that
won't help if ftp/sftp is actually required it at least does
not break http/https downloads.
Item 2: While not supported it at least does not break the operation.
Item 3: If there are relative path components in -P or -O then wget2
only deals with them correctly if there is one, and only one, relative
path component at the beginning of the path:
-P ./downloads works
-P ../downloads works
-P ../../downloads does not work
-P ./../downloads does not work
-P /home/user/downloads/../downloads does not work
In cases where there are more than one relative path component at
the beginning of the path and/or one or more reltaive path
component somewhere in the middle or end of the path, wget2 aborts
with the message Internal error: Unexpected relative path: '<path>')
Such can happen if DL_DIR includes relative path components e.g.
DL_DIR = "${TOPDIR}/../../downloads".
This patch canonicalizes DL_DIR before it is passed to wget.
(Bitbake rev: 3e4208952b086adc510e78c1c5f9cf4550d79dc9)
Signed-off-by: Rudolf J Streif <rudolf.streif@ibeeto.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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.