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  1. 204529e Move 'Windows deterministic' from FYI to the main waterfall. by Nico Weber · 4 hours ago master
  2. c2a5ea2 Put back strip_absolute_paths_from_debug_symbols=true on goma bots. by Nico Weber · 13 hours ago
  3. 81dda33 Stop explicitly setting strip_absolute_paths_from_debug_symbols to true. by Nico Weber · 30 hours ago
  4. 2f3c7d1 [code coverage] Split linux-code-coverage-generation as builder/tester. by Roberto Carrillo · 4 days ago
  5. cdee8d5 Add src-side configs for android-jumbo-rel CI bot. by Ben Pastene · 4 days ago

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: