Merge changes I9e94662d,I4b4e0dc8

* changes:
  Export implementation class jars for java_boot_libs
  Improve module filtering in hiddenapi stubFlagsRule()

android/sdk.go

@@ -177,12 +177,6 @@ type SnapshotBuilder interface {
 	// to the zip
 	CopyToSnapshot(src Path, dest string)
 
-	// Return the path to an empty file.
-	//
-	// This can be used by sdk member types that need to create an empty file in the snapshot, simply
-	// pass the value returned from this to the CopyToSnapshot() method.
-	EmptyFile() Path
-
 	// Unzip the supplied zip into the snapshot relative directory destDir.
 	UnzipToSnapshot(zipPath Path, destDir string)
 

java/dexpreopt_bootjars.go

@@ -435,6 +435,11 @@ func (d *dexpreoptBootJars) GenerateSingletonBuildActions(ctx android.SingletonC
 // Inspect this module to see if it contains a bootclasspath dex jar.
 // Note that the same jar may occur in multiple modules.
 // This logic is tested in the apex package to avoid import cycle apex <-> java.
+//
+// This is similar to logic in isModuleInConfiguredList() so any changes needed here are likely to
+// be needed there too.
+//
+// TODO(b/177892522): Avoid having to perform this type of check or if necessary dedup it.
 func getBootImageJar(ctx android.SingletonContext, image *bootImageConfig, module android.Module) (int, android.Path) {
 	name := ctx.ModuleName(module)
 

java/hiddenapi_singleton.go

@@ -213,6 +213,10 @@ func stubFlagsRule(ctx android.SingletonContext) {
 
 	var bootDexJars android.Paths
 
+	// Get the configured non-updatable and updatable boot jars.
+	nonUpdatableBootJars := ctx.Config().NonUpdatableBootJars()
+	updatableBootJars := ctx.Config().UpdatableBootJars()
+
 	ctx.VisitAllModules(func(module android.Module) {
 		// Collect dex jar paths for the modules listed above.
 		if j, ok := module.(Dependency); ok {
@@ -227,11 +231,8 @@ func stubFlagsRule(ctx android.SingletonContext) {
 		// Collect dex jar paths for modules that had hiddenapi encode called on them.
 		if h, ok := module.(hiddenAPIIntf); ok {
 			if jar := h.bootDexJar(); jar != nil {
-				// For a java lib included in an APEX, only take the one built for
-				// the platform variant, and skip the variants for APEXes.
-				// Otherwise, the hiddenapi tool will complain about duplicated classes
-				apexInfo := ctx.ModuleProvider(module, android.ApexInfoProvider).(android.ApexInfo)
-				if !apexInfo.IsForPlatform() {
+				if !isModuleInConfiguredList(ctx, module, nonUpdatableBootJars) &&
+					!isModuleInConfiguredList(ctx, module, updatableBootJars) {
 					return
 				}
 
@@ -280,6 +281,47 @@ func stubFlagsRule(ctx android.SingletonContext) {
 	rule.Build("hiddenAPIStubFlagsFile", "hiddenapi stub flags")
 }
 
+// Checks to see whether the supplied module variant is in the list of boot jars.
+//
+// This is similar to logic in getBootImageJar() so any changes needed here are likely to be needed
+// there too.
+//
+// TODO(b/179354495): Avoid having to perform this type of check or if necessary dedup it.
+func isModuleInConfiguredList(ctx android.SingletonContext, module android.Module, configuredBootJars android.ConfiguredJarList) bool {
+	name := ctx.ModuleName(module)
+
+	// Strip a prebuilt_ prefix so that this can match a prebuilt module that has not been renamed.
+	name = android.RemoveOptionalPrebuiltPrefix(name)
+
+	// Ignore any module that is not listed in the boot image configuration.
+	index := configuredBootJars.IndexOfJar(name)
+	if index == -1 {
+		return false
+	}
+
+	// It is an error if the module is not an ApexModule.
+	if _, ok := module.(android.ApexModule); !ok {
+		ctx.Errorf("module %q configured in boot jars does not support being added to an apex", module)
+		return false
+	}
+
+	apexInfo := ctx.ModuleProvider(module, android.ApexInfoProvider).(android.ApexInfo)
+
+	// Now match the apex part of the boot image configuration.
+	requiredApex := configuredBootJars.Apex(index)
+	if requiredApex == "platform" {
+		if len(apexInfo.InApexes) != 0 {
+			// A platform variant is required but this is for an apex so ignore it.
+			return false
+		}
+	} else if !apexInfo.InApexByBaseName(requiredApex) {
+		// An apex variant for a specific apex is required but this is the wrong apex.
+		return false
+	}
+
+	return true
+}
+
 func prebuiltFlagsRule(ctx android.SingletonContext) android.Path {
 	outputPath := hiddenAPISingletonPaths(ctx).flags
 	inputPath := android.PathForSource(ctx, ctx.Config().PrebuiltHiddenApiDir(ctx), "hiddenapi-flags.csv")

java/java.go

@@ -40,18 +40,21 @@ func init() {
 	// Register sdk member types.
 	android.RegisterSdkMemberType(javaHeaderLibsSdkMemberType)
 
-	// Register java implementation libraries for use only in module_exports (not sdk).
-	android.RegisterSdkMemberType(&librarySdkMemberType{
-		android.SdkMemberTypeBase{
-			PropertyName: "java_libs",
-		},
-		func(_ android.SdkMemberContext, j *Library) android.Path {
+	// Export implementation classes jar as part of the sdk.
+	exportImplementationClassesJar := func(_ android.SdkMemberContext, j *Library) android.Path {
 		implementationJars := j.ImplementationAndResourcesJars()
 		if len(implementationJars) != 1 {
 			panic(fmt.Errorf("there must be only one implementation jar from %q", j.Name()))
 		}
 		return implementationJars[0]
+	}
+
+	// Register java implementation libraries for use only in module_exports (not sdk).
+	android.RegisterSdkMemberType(&librarySdkMemberType{
+		android.SdkMemberTypeBase{
+			PropertyName: "java_libs",
 		},
+		exportImplementationClassesJar,
 		sdkSnapshotFilePathForJar,
 		copyEverythingToSnapshot,
 	})
@@ -72,19 +75,11 @@ func init() {
 			PropertyName: "java_boot_libs",
 			SupportsSdk:  true,
 		},
-		func(ctx android.SdkMemberContext, j *Library) android.Path {
-			// Java boot libs are only provided in the SDK to provide access to their dex implementation
-			// jar for use by dexpreopting and boot jars package check. They do not need to provide an
-			// actual implementation jar but the java_import will need a file that exists so just copy an
-			// empty file. Any attempt to use that file as a jar will cause a build error.
-			return ctx.SnapshotBuilder().EmptyFile()
-		},
-		func(osPrefix, name string) string {
-			// Create a special name for the implementation jar to try and provide some useful information
-			// to a developer that attempts to compile against this.
-			// TODO(b/175714559): Provide a proper error message in Soong not ninja.
-			return filepath.Join(osPrefix, "java_boot_libs", "snapshot", "jars", "are", "invalid", name+jarFileSuffix)
-		},
+		// Temporarily export implementation classes jar for java_boot_libs as it is required for the
+		// hiddenapi processing.
+		// TODO(b/179354495): Revert once hiddenapi processing has been modularized.
+		exportImplementationClassesJar,
+		sdkSnapshotFilePathForJar,
 		onlyCopyJarToSnapshot,
 	})
 

sdk/java_sdk_test.go

@@ -503,7 +503,7 @@ java_import {
     sdk_member_name: "myjavalib",
     visibility: ["//visibility:public"],
     apex_available: ["//apex_available:platform"],
-    jars: ["java_boot_libs/snapshot/jars/are/invalid/myjavalib.jar"],
+    jars: ["java/myjavalib.jar"],
 }
 
 java_import {
@@ -511,7 +511,7 @@ java_import {
     prefer: false,
     visibility: ["//visibility:public"],
     apex_available: ["//apex_available:platform"],
-    jars: ["java_boot_libs/snapshot/jars/are/invalid/myjavalib.jar"],
+    jars: ["java/myjavalib.jar"],
 }
 
 module_exports_snapshot {
@@ -519,10 +519,9 @@ module_exports_snapshot {
     visibility: ["//visibility:public"],
     java_boot_libs: ["myexports_myjavalib@current"],
 }
-
 `),
 		checkAllCopyRules(`
-.intermediates/myexports/common_os/empty -> java_boot_libs/snapshot/jars/are/invalid/myjavalib.jar
+.intermediates/myjavalib/android_common/withres/myjavalib.jar -> java/myjavalib.jar
 `),
 	)
 }

sdk/update.go

@@ -653,9 +653,6 @@ type snapshotBuilder struct {
 	filesToZip  android.Paths
 	zipsToMerge android.Paths
 
-	// The path to an empty file.
-	emptyFile android.WritablePath
-
 	prebuiltModules map[string]*bpModule
 	prebuiltOrder   []*bpModule
 
@@ -706,19 +703,6 @@ func (s *snapshotBuilder) UnzipToSnapshot(zipPath android.Path, destDir string)
 	s.zipsToMerge = append(s.zipsToMerge, tmpZipPath)
 }
 
-func (s *snapshotBuilder) EmptyFile() android.Path {
-	if s.emptyFile == nil {
-		ctx := s.ctx
-		s.emptyFile = android.PathForModuleOut(ctx, "empty")
-		s.ctx.Build(pctx, android.BuildParams{
-			Rule:   android.Touch,
-			Output: s.emptyFile,
-		})
-	}
-
-	return s.emptyFile
-}
-
 func (s *snapshotBuilder) AddPrebuiltModule(member android.SdkMember, moduleType string) android.BpModule {
 	name := member.Name()
 	if s.prebuiltModules[name] != nil {