11cb0ef41Sopenharmony_ci# MB - The Meta-Build wrapper 21cb0ef41Sopenharmony_ci 31cb0ef41Sopenharmony_ciMB is a simple wrapper intended to provide a uniform interface to either 41cb0ef41Sopenharmony_ciGYP or GN, such that users and bots can call one script and not need to 51cb0ef41Sopenharmony_ciworry about whether a given bot is meant to use GN or GYP. 61cb0ef41Sopenharmony_ci 71cb0ef41Sopenharmony_ciIt supports two main functions: 81cb0ef41Sopenharmony_ci 91cb0ef41Sopenharmony_ci1. "gen" - the main `gyp_chromium` / `gn gen` invocation that generates the 101cb0ef41Sopenharmony_ci Ninja files needed for the build. 111cb0ef41Sopenharmony_ci 121cb0ef41Sopenharmony_ci2. "analyze" - the step that takes a list of modified files and a list of 131cb0ef41Sopenharmony_ci desired targets and reports which targets will need to be rebuilt. 141cb0ef41Sopenharmony_ci 151cb0ef41Sopenharmony_ciWe also use MB as a forcing function to collect all of the different 161cb0ef41Sopenharmony_cibuild configurations that we actually support for Chromium builds into 171cb0ef41Sopenharmony_cione place, in `//tools/mb/mb_config.pyl`. 181cb0ef41Sopenharmony_ci 191cb0ef41Sopenharmony_ciFor more information, see: 201cb0ef41Sopenharmony_ci 211cb0ef41Sopenharmony_ci* [The User Guide](docs/user_guide.md) 221cb0ef41Sopenharmony_ci* [The Design Spec](docs/design_spec.md) 23