skia2/site/dev/design/sync-and-gyp.md

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sync-and-gyp

sync-and-gyp is a Python program that wraps gclient sync and gyp_skia. Motivations for using it:

  • Fewer steps to configure and compile Skia and Skia's dependencies. This makes documentation cleaner, too.

  • Written in Python, so it will work on all platforms. Python is already necessary for gyp.

  • Sets up gclient better than gclient config, which has been broken.

  • Checks to see if the DEPS file has changed since it last ran gclient sync. If not, it skips that step.

  • Checks to see if gyp needs to be re-run (it checks environment variables and changed or added files); if not, it skips running gyp_skia.

  • Since running sync-and-gyp is fast when it can do nothing, it is easy to do before every recompile of Skia. This is a good habit.