Generalize the platformBootclasspathDepsMutator

Adds a BootclasspathDepsMutator that is currently only implemented by
the platform_bootclasspath but which can be implemented by
bootclasspath_fragment too.

Bug: 177892522
Test: m nothing
Change-Id: Ibe35854281004d6e40bf1f797144fb582e8c08b9

java/bootclasspath.go

@@ -24,6 +24,33 @@ import (
 
 // Contains code that is common to both platform_bootclasspath and bootclasspath_fragment.
 
+func init() {
+	registerBootclasspathBuildComponents(android.InitRegistrationContext)
+}
+
+func registerBootclasspathBuildComponents(ctx android.RegistrationContext) {
+	ctx.FinalDepsMutators(func(ctx android.RegisterMutatorsContext) {
+		ctx.BottomUp("bootclasspath_deps", bootclasspathDepsMutator)
+	})
+}
+
+// BootclasspathDepsMutator is the interface that a module must implement if it wants to add
+// dependencies onto APEX specific variants of bootclasspath fragments or bootclasspath contents.
+type BootclasspathDepsMutator interface {
+	// BootclasspathDepsMutator implementations should add dependencies using
+	// addDependencyOntoApexModulePair and addDependencyOntoApexVariants.
+	BootclasspathDepsMutator(ctx android.BottomUpMutatorContext)
+}
+
+// bootclasspathDepsMutator is called during the final deps phase after all APEX variants have
+// been created so can add dependencies onto specific APEX variants of modules.
+func bootclasspathDepsMutator(ctx android.BottomUpMutatorContext) {
+	m := ctx.Module()
+	if p, ok := m.(BootclasspathDepsMutator); ok {
+		p.BootclasspathDepsMutator(ctx)
+	}
+}
+
 // addDependencyOntoApexVariants adds dependencies onto the appropriate apex specific variants of
 // the module as specified in the ApexVariantReference list.
 func addDependencyOntoApexVariants(ctx android.BottomUpMutatorContext, propertyName string, refs []ApexVariantReference, tag blueprint.DependencyTag) {

java/platform_bootclasspath.go

@@ -27,10 +27,6 @@ func init() {
 
 func registerPlatformBootclasspathBuildComponents(ctx android.RegistrationContext) {
 	ctx.RegisterModuleType("platform_bootclasspath", platformBootclasspathFactory)
-
-	ctx.FinalDepsMutators(func(ctx android.RegisterMutatorsContext) {
-		ctx.BottomUp("platform_bootclasspath_deps", platformBootclasspathDepsMutator)
-	})
 }
 
 // The tag used for the dependency between the platform bootclasspath and any configured boot jars.
@@ -126,25 +122,22 @@ func (b *platformBootclasspathModule) hiddenAPIDepsMutator(ctx android.BottomUpM
 	hiddenAPIAddStubLibDependencies(ctx, sdkKindToStubLibModules)
 }
 
-func platformBootclasspathDepsMutator(ctx android.BottomUpMutatorContext) {
+func (b *platformBootclasspathModule) BootclasspathDepsMutator(ctx android.BottomUpMutatorContext) {
-	m := ctx.Module()
+	// Add dependencies on all the modules configured in the "art" boot image.
-	if p, ok := m.(*platformBootclasspathModule); ok {
+	artImageConfig := genBootImageConfigs(ctx)[artBootImageName]
-		// Add dependencies on all the modules configured in the "art" boot image.
+	addDependenciesOntoBootImageModules(ctx, artImageConfig.modules)
-		artImageConfig := genBootImageConfigs(ctx)[artBootImageName]
-		addDependenciesOntoBootImageModules(ctx, artImageConfig.modules)
 
-		// Add dependencies on all the modules configured in the "boot" boot image. That does not
+	// Add dependencies on all the modules configured in the "boot" boot image. That does not
-		// include modules configured in the "art" boot image.
+	// include modules configured in the "art" boot image.
-		bootImageConfig := p.getImageConfig(ctx)
+	bootImageConfig := b.getImageConfig(ctx)
-		addDependenciesOntoBootImageModules(ctx, bootImageConfig.modules)
+	addDependenciesOntoBootImageModules(ctx, bootImageConfig.modules)
 
-		// Add dependencies on all the updatable modules.
+	// Add dependencies on all the updatable modules.
-		updatableModules := dexpreopt.GetGlobalConfig(ctx).UpdatableBootJars
+	updatableModules := dexpreopt.GetGlobalConfig(ctx).UpdatableBootJars
-		addDependenciesOntoBootImageModules(ctx, updatableModules)
+	addDependenciesOntoBootImageModules(ctx, updatableModules)
 
-		// Add dependencies on all the fragments.
+	// Add dependencies on all the fragments.
-		p.properties.BootclasspathFragmentsDepsProperties.addDependenciesOntoFragments(ctx)
+	b.properties.BootclasspathFragmentsDepsProperties.addDependenciesOntoFragments(ctx)
-	}
 }
 
 func addDependenciesOntoBootImageModules(ctx android.BottomUpMutatorContext, modules android.ConfiguredJarList) {

java/testing.go

@@ -232,6 +232,7 @@ func registerRequiredBuildComponentsForTest(ctx android.RegistrationContext) {
 	RegisterAppBuildComponents(ctx)
 	RegisterAppImportBuildComponents(ctx)
 	RegisterAppSetBuildComponents(ctx)
+	registerBootclasspathBuildComponents(ctx)
 	RegisterBootImageBuildComponents(ctx)
 	RegisterDexpreoptBootJarsComponents(ctx)
 	RegisterDocsBuildComponents(ctx)