tree: b56fa495b73edbc460d6970046235ec9ae27fa08 [path history] [tgz]
  1. docs/
  2. lib/
  3. __init__.py
  4. mb
  5. mb.bat
  6. mb.py
  7. mb_config.pyl
  8. mb_config_buckets.pyl
  9. mb_unittest.py
  10. mb_validation_unittest.py
  11. OWNERS
  12. PRESUBMIT.py
  13. README.md
tools/mb/README.md

MB - The Meta-Build wrapper

MB is a simple wrapper around the GN build tool.

It was originally written as part of the GYP->GN migration, in order to provide a uniform interface to either GYP or GN, such that users and bots can call one script and not need to worry about whether a given bot was meant to use GN or GYP.

It eventually grew additional functionality and is now still used even though everything is GN-only.

It supports two main functions:

  1. “gen” - the main gn gen invocation that generates the Ninja files needed for the build.

  2. “analyze” - the step that takes a list of modified files and a list of desired targets and reports which targets will need to be rebuilt.

We also use MB as a forcing function to collect all of the different build configurations that we actually support for Chromium builds into one place, in //tools/mb/mb_config.pyl.

For more information, see: