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  1. Bitbake
    2. 

  2. =======
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  3. 

  4. BitBake is a generic task execution engine that allows shell and Python tasks to be run
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  5. efficiently and in parallel while working within complex inter-task dependency constraints.
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  6. One of BitBake's main users, OpenEmbedded, takes this core and builds embedded Linux software
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  7. stacks using a task-oriented approach.
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  8. 

  9. For information about Bitbake, see the OpenEmbedded website:
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  10.     https://www.openembedded.org/
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  11. 

  12. Bitbake plain documentation can be found under the doc directory or its integrated
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  13. html version at the Yocto Project website:
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  14.     https://docs.yoctoproject.org
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  15. 

  16. Bitbake requires Python version 3.8 or newer.
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  17. 

  18. Contributing
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  19. ------------
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  20. 

  21. Please refer to our contributor guide here: https://docs.yoctoproject.org/contributor-guide/
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  22. for full details on how to submit changes.
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  23. 

  24. As a quick guide, patches should be sent to bitbake-devel@lists.openembedded.org
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  25. The git command to do that would be:
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  26. 

  27.     git send-email -M -1 --to bitbake-devel@lists.openembedded.org
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  28. 

  29. If you're sending a patch related to the BitBake manual, make sure you copy
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  30. the Yocto Project documentation mailing list:
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  31. 

  32.     git send-email -M -1 --to bitbake-devel@lists.openembedded.org --cc docs@lists.yoctoproject.org
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  33. 

  34. Mailing list:
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  35. 

  36.     https://lists.openembedded.org/g/bitbake-devel
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  37. 

  38. Source code:
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  39. 

  40.     https://git.openembedded.org/bitbake/
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  41. 

  42. Testing
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  43. -------
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  44. 

  45. Bitbake has a testsuite located in lib/bb/tests/ whichs aim to try and prevent regressions.
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  46. You can run this with "bitbake-selftest". In particular the fetcher is well covered since
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  47. it has so many corner cases. The datastore has many tests too. Testing with the testsuite is
    48. 

  48. recommended before submitting patches, particularly to the fetcher and datastore. We also
    49. 

  49. appreciate new test cases and may require them for more obscure issues.
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  50. 

  51. To run the tests "zstd" and "git" must be installed.
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  52. 

  53. The assumption is made that this testsuite is run from an initialized OpenEmbedded build
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  54. environment (i.e. `source oe-init-build-env` is used). If this is not the case, run the
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  55. testsuite as follows:
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  56. 

  57.     export PATH=$(pwd)/bin:$PATH
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  58.     bin/bitbake-selftest
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  59. 

  60. The testsuite can alternatively be executed using pytest, e.g. obtained from PyPI (in this
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  61. case, the PATH is configured automatically):
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  62. 

  63.     pytest
    64.