poky/bitbake
Antonin Godard c0e2fa79c7 bitbake: bitbake-user-manual/ref-variables: extend PERSISTENT_DIR doc
Extend the current documentation of PERSISTENT_DIR:

- Mention that it also contains the hash equivalence database when
  BB_HASHSERVE = auto.
- Mention that it should not be shared between builds.

[YOCTO #15727]

(Bitbake rev: 682c2dccb67a57ecbf93aac8e9deea88bff10155)

Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2025-11-03 17:43:31 +00:00
..
bin bitbake: bitbake-setup: correctly define --global argument for settings management 2025-11-03 17:43:31 +00:00
contrib bitbake: contrib: vim: Update file detection regex 2025-11-03 17:43:31 +00:00
default-registry/configurations bitbake: bitbake: registry: make a separate configuration for poky with sstate mirror 2025-10-14 11:24:57 +01:00
doc bitbake: bitbake-user-manual/ref-variables: extend PERSISTENT_DIR doc 2025-11-03 17:43:31 +00:00
lib bitbake: fetch2/git: when raising ParameterError for an invalid proto, include the proto in the message 2025-11-03 17:43:31 +00:00
.b4-config bitbake: b4-config: Add basic support for b4 contribution workflow 2025-02-06 10:40:10 +00:00
.gitattributes
AUTHORS
ChangeLog
LICENSE
LICENSE.GPL-2.0-only
LICENSE.MIT
README bitbake: doc: README: simpler link to contributor guide 2024-02-10 14:13:51 +00:00
SECURITY.md bitbake: SECURITY.md: add file 2023-10-24 12:49:56 +01:00
toaster-requirements.txt bitbake: Update toaster-requirements to add django-log-viewer==1.1.7 2023-10-15 09:12:05 +01:00

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 our contributor guide here: https://docs.yoctoproject.org/contributor-guide/
for full details on how to submit changes.

As a quick guide, patches should be sent to bitbake-devel@lists.openembedded.org
The git command to do that would be:

    git send-email -M -1 --to bitbake-devel@lists.openembedded.org

If you're sending a patch related to the BitBake manual, make sure you copy
the Yocto Project documentation mailing list:

    git send-email -M -1 --to bitbake-devel@lists.openembedded.org --cc docs@lists.yoctoproject.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.

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

The testsuite can alternatively be executed using pytest, e.g. obtained from PyPI (in this
case, the PATH is configured automatically):

    pytest