7bd328f9d2
We have some confusion for users since some classes are meant to work in the configuration space (or "globally") and some are meant to be selected by recipes individually. The cleanest way I could find to clarify this is to create "classes-global" and "classes-recipe" directories which contain the approproate classes and have bitbake switch scope between them at the appropriate point during parsing. The existing "classes" directory is always searched as a fallback. Once a class is moved to a specific directory, it will no longer be found in the incorrect context. A good example from OE is that INHERIT += "testimage" will no longer work but IMAGE_CLASSES += "testimage" will, which makes the global scope cleaner by only including it where it is useful and intended to be used (images). (Bitbake rev: f33ce7e742f46635658c400b82558cf822690b5e) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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
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.