Implement transition mutators. These are more limited than bottom-up or top-down mutators but in exchange have some pleasant properties: - "variant not found" errors are impossible - The logic is pleasantly split into multiple, mostly orthogonal parts - Theoretically, if every mutator is refactored like this, they make it possible to partially cache the module graph - Are quite close to a "configuration transition" in Bazel. Bug: 231370928 Test: Presubmits. Change-Id: Idcdb66b5ea75c0d2838f527aaa988df3b12553d8
Blueprint is being archived on 2021 May 3.
On 2021 May 3, we will be archiving the Blueprint project. This means it will not be possible to file new issues or open new pull requests for this GitHub project. As the project is being archived, patches -- including security patches -- will not be applied after May 3. The source tree will remain available, but changes to Blueprint in AOSP will not be merged here and Blueprint's source tree in AOSP will eventually stop being usable outside of Android.
Whereas there are no meta-build systems one can use as a drop-in replacement for Blueprint, there are a number of build systems that can be used: