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Change-Id: Iaef366aaf6e152ec6938c60acaefb89177ec735d Bug: 360878342 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5846888 Reviewed-by: Prakhar Asthana <pasthana@google.com> Reviewed-by: Struan Shrimpton <sshrimp@google.com> Commit-Queue: Tony Seaward <seawardt@google.com> Cr-Commit-Position: refs/heads/main@{#1373534}
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:
-
"gen" - the main
gn geninvocation that generates the Ninja files needed for the build. -
"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: