build_log_simplifier validation failures

If build_log_simplifier failed your build, then your change caused the AndroidX build to generate new build output messages

Why is new build output important?

  • This new output might contain new warnings. If you can fix these issues, please do so

  • Developers in the future might encounter unrelated build failures, and could have difficulty diagnosing them due to being distracted/confused by the output that you would be adding now

Can I see the full Gradle output?

  • The full output from Gradle (before build_log_simplifier.py processes it) should be found in gradle.log

    • If your build failed on the build server, you can download gradle.log via your browser:

      • Press the left arrow to go back to the screen that lists build server artifacts

      • Press “ctrl-f” and search for the file that you are looking for

      • Click the file to download it

How can I update the baseline file?

Where is the baseline file?

  • Exemptions for output that is always/deterministically generated by the build go in messages.ignore

    • We may periodically garbage collect exemptions in this file via update.sh --gc, so they may be automatically removed after their underlying issue is fixed

    • In most cases, this will be the correct file to update

  • Exemptions for output that is only sometimes (flakily) generated by the build go in message-flakes.ignore

    • These exemptions will not be automatically garbage collected

What changes do I make to the baseline file?

  • If the build failed on a build server:

    • You may automatically update the baseline to include the output for a given build id

      • Run ./development/build_log_simplifier/update.sh ${buildId}

  • If your build failed on your computer, you can copy the suggested exemptions file

    • If your build failed on your computer, you can read its instructions about where to copy the suggested exemptions file from

  • You can manually edit the exemptions file

    • These build message exemptions files are each a list of regular expressions and comments, which you can modify manually

    • If you would like to test your changes to the exemptions file without having to rerun Gradle, you can download gradle.log (see above) and ask build_log_simplifier.py to validate the result:

      • frameworks/support $ development/build_log_simplifier.py --validate ~/gradle.log