Support aapt2 resources flagging

This change modifies the aconfig and aapt2 build rules to support
resources flagging in aapt2.

Implementation details:
- Modify the aconfig text rule to include flag permission in the output
  text file
- Pass the `--flags-packages` argument to `aapt2 compile` command,
  similar to what is currently being done in the `aapt2 link` command

Bug: 344979955
Test: m nothing --no-skip-soong-tests
Change-Id: I3b0b1fd6dcd691b7cc50ba3d081ecafd82c2c904

aconfig/init.go

@@ -47,7 +47,7 @@ var (
 	// For create-device-config-sysprops: Generate aconfig flag value map text file
 	aconfigTextRule = pctx.AndroidStaticRule("aconfig_text",
 		blueprint.RuleParams{
-			Command: `${aconfig} dump-cache --dedup --format='{fully_qualified_name}={state:bool}'` +
+			Command: `${aconfig} dump-cache --dedup --format='{fully_qualified_name}:{permission}={state:bool}'` +
 				` --cache ${in}` +
 				` --out ${out}.tmp` +
 				` && ( if cmp -s ${out}.tmp ${out} ; then rm ${out}.tmp ; else mv ${out}.tmp ${out} ; fi )`,

java/aapt2.go

@@ -69,7 +69,7 @@ var aapt2CompileRule = pctx.AndroidStaticRule("aapt2Compile",
 
 // aapt2Compile compiles resources and puts the results in the requested directory.
 func aapt2Compile(ctx android.ModuleContext, dir android.Path, paths android.Paths,
-	flags []string, productToFilter string) android.WritablePaths {
+	flags []string, productToFilter string, featureFlagsPaths android.Paths) android.WritablePaths {
 	if productToFilter != "" && productToFilter != "default" {
 		// --filter-product leaves only product-specific resources. Product-specific resources only exist
 		// in value resources (values/*.xml), so filter value resource files only. Ignore other types of
@@ -85,6 +85,10 @@ func aapt2Compile(ctx android.ModuleContext, dir android.Path, paths android.Pat
 		flags = append([]string{"--filter-product " + productToFilter}, flags...)
 	}
 
+	for _, featureFlagsPath := range android.SortedUniquePaths(featureFlagsPaths) {
+		flags = append(flags, "--feature-flags", "@"+featureFlagsPath.String())
+	}
+
 	// Shard the input paths so that they can be processed in parallel. If we shard them into too
 	// small chunks, the additional cost of spinning up aapt2 outweighs the performance gain. The
 	// current shard size, 100, seems to be a good balance between the added cost and the gain.
@@ -112,6 +116,7 @@ func aapt2Compile(ctx android.ModuleContext, dir android.Path, paths android.Pat
 		ctx.Build(pctx, android.BuildParams{
 			Rule:        aapt2CompileRule,
 			Description: "aapt2 compile " + dir.String() + shardDesc,
+			Implicits:   featureFlagsPaths,
 			Inputs:      shard,
 			Outputs:     outPaths,
 			Args: map[string]string{

java/aar.go

@@ -440,7 +440,8 @@ func (a *aapt) buildActions(ctx android.ModuleContext, opts aaptBuildActionOptio
 	var compiledResDirs []android.Paths
 	for _, dir := range resDirs {
 		a.resourceFiles = append(a.resourceFiles, dir.files...)
-		compiledResDirs = append(compiledResDirs, aapt2Compile(ctx, dir.dir, dir.files, compileFlags, a.filterProduct()).Paths())
+		compiledResDirs = append(compiledResDirs, aapt2Compile(ctx, dir.dir, dir.files,
+			compileFlags, a.filterProduct(), opts.aconfigTextFiles).Paths())
 	}
 
 	for i, zip := range resZips {
@@ -499,7 +500,8 @@ func (a *aapt) buildActions(ctx android.ModuleContext, opts aaptBuildActionOptio
 	}
 
 	for _, dir := range overlayDirs {
-		compiledOverlay = append(compiledOverlay, aapt2Compile(ctx, dir.dir, dir.files, compileFlags, a.filterProduct()).Paths()...)
+		compiledOverlay = append(compiledOverlay, aapt2Compile(ctx, dir.dir, dir.files,
+			compileFlags, a.filterProduct(), opts.aconfigTextFiles).Paths()...)
 	}
 
 	var splitPackages android.WritablePaths

java/app_test.go

@@ -4364,7 +4364,16 @@ func TestPrivappAllowlistAndroidMk(t *testing.T) {
 }
 
 func TestAppFlagsPackages(t *testing.T) {
-	ctx := testApp(t, `
+	ctx := android.GroupFixturePreparers(
+		prepareForJavaTest,
+		android.FixtureMergeMockFs(
+			map[string][]byte{
+				"res/layout/layout.xml":         nil,
+				"res/values/strings.xml":        nil,
+				"res/values-en-rUS/strings.xml": nil,
+			},
+		),
+	).RunTestWithBp(t, `
 		android_app {
 			name: "foo",
 			srcs: ["a.java"],
@@ -4396,10 +4405,10 @@ func TestAppFlagsPackages(t *testing.T) {
 
 	// android_app module depends on aconfig_declarations listed in flags_packages
 	android.AssertBoolEquals(t, "foo expected to depend on bar", true,
-		CheckModuleHasDependency(t, ctx, "foo", "android_common", "bar"))
+		CheckModuleHasDependency(t, ctx.TestContext, "foo", "android_common", "bar"))
 
 	android.AssertBoolEquals(t, "foo expected to depend on baz", true,
-		CheckModuleHasDependency(t, ctx, "foo", "android_common", "baz"))
+		CheckModuleHasDependency(t, ctx.TestContext, "foo", "android_common", "baz"))
 
 	aapt2LinkRule := foo.Rule("android/soong/java.aapt2Link")
 	linkInFlags := aapt2LinkRule.Args["inFlags"]
@@ -4408,6 +4417,14 @@ func TestAppFlagsPackages(t *testing.T) {
 		linkInFlags,
 		"--feature-flags @out/soong/.intermediates/bar/intermediate.txt --feature-flags @out/soong/.intermediates/baz/intermediate.txt",
 	)
+
+	aapt2CompileRule := foo.Rule("android/soong/java.aapt2Compile")
+	compileFlags := aapt2CompileRule.Args["cFlags"]
+	android.AssertStringDoesContain(t,
+		"aapt2 compile command expected to pass feature flags arguments",
+		compileFlags,
+		"--feature-flags @out/soong/.intermediates/bar/intermediate.txt --feature-flags @out/soong/.intermediates/baz/intermediate.txt",
+	)
 }
 
 func TestAppFlagsPackagesPropagation(t *testing.T) {