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bp2build: framework for generating BazelTargetModules.

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This CL creates the framework necessary for generating
BazelTargetModules from regular Soong Android modules.
BazelTargetModules are code-generated into Bazel targets in BUILD files.

See the follow-up CL for examples of creating filegroup/genrule
BazelTargetModules.

Test: GENERATE_BAZEL_FILES=true m nothing # creates out/soong/bp2build
with no BUILD files, because there are no BazelTargetModules in the
module graph.

Change-Id: I33a96365bd439043b13af6db9e439592e9983188
This commit is contained in:
Jingwen Chen
2020-12-14 08:25:34 -05:00
parent de1357378b
commit 7385067640
15 changed files with 295 additions and 51 deletions
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28
android/mutator.go
View File

@@ -44,9 +44,16 @@ func registerMutatorsToContext(ctx *blueprint.Context, mutators []*mutator) {
}
}
func registerMutatorsForBazelConversion(ctx *blueprint.Context) {
// FIXME(b/171263886): Start bringing in mutators to make the Bionic
// module subgraph suitable for automated conversion.
// RegisterMutatorsForBazelConversion is a alternate registration pipeline for bp2build. Exported for testing.
func RegisterMutatorsForBazelConversion(ctx *blueprint.Context, bp2buildMutators []RegisterMutatorFunc) {
mctx := &registerMutatorsContext{}
// Register bp2build mutators
for _, f := range bp2buildMutators {
f(mctx)
}
registerMutatorsToContext(ctx, mctx.mutators)
}
func registerMutators(ctx *blueprint.Context, preArch, preDeps, postDeps, finalDeps []RegisterMutatorFunc) {
@@ -196,6 +203,21 @@ func FinalDepsMutators(f RegisterMutatorFunc) {
finalDeps = append(finalDeps, f)
}
var bp2buildMutators = []RegisterMutatorFunc{}
// RegisterBp2BuildMutator registers specially crafted mutators for
// converting Blueprint/Android modules into special modules that can
// be code-generated into Bazel BUILD targets.
//
// TODO(b/178068862): bring this into TestContext.
func RegisterBp2BuildMutator(moduleType string, m func(TopDownMutatorContext)) {
mutatorName := moduleType + "_bp2build"
f := func(ctx RegisterMutatorsContext) {
ctx.TopDown(mutatorName, m)
}
bp2buildMutators = append(bp2buildMutators, f)
}
type BaseMutatorContext interface {
BaseModuleContext