Regenerate R.java files from LOCAL_STATIC_ANDROID_LIBRARIES

If a static android library lib1 has static_libs: ["lib2"] then the
R.class files for packages in lib2 will be merged into the jar for
lib1.  If an app has lib1 in its static_libs it will get the R.class
files from lib2 through lib1, instead of regenerating the R.java
files with numbering that matches the resource table of the app.

Pass transtive static android library dependencies on the aapt2
command line so that aapt2 will always regenerate the R.java
constants for those packages.

Also extract the packages that have R.java files after each aapt2
invocation.  This is not necessary for Soong, but is passed to
make to let it force regenerating the packages using
--extra-packages.

Bug: 78300023
Test: m checkbuild
Change-Id: I0f3444af44d2a9f370d1f156c908972f8cc3a1ee

cmd/extract_jar_packages/Android.bp

@@ -0,0 +1,25 @@
+// Copyright 2018 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+blueprint_go_binary {
+    name: "extract_jar_packages",
+    deps: [
+        "android-archive-zip",
+        "blueprint-pathtools",
+    ],
+    srcs: [
+        "extract_jar_packages.go",
+    ],
+}
+

cmd/extract_jar_packages/extract_jar_packages.go

@@ -0,0 +1,88 @@
+// Copyright 2018 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+	"archive/zip"
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+)
+
+var (
+	outputFile = flag.String("o", "", "output file")
+	prefix     = flag.String("prefix", "", "prefix for each entry in the output file")
+	inputFile  = flag.String("i", "", "input jar or srcjar")
+)
+
+func must(err error) {
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
+func fileToPackage(file string) string {
+	dir := filepath.Dir(file)
+	return strings.Replace(dir, "/", ".", -1)
+}
+
+func main() {
+	flag.Usage = func() {
+		fmt.Fprintln(os.Stderr, "usage: extract_jar_packages -i <input file> -o <output -file> [-prefix <prefix>]")
+		flag.PrintDefaults()
+	}
+
+	flag.Parse()
+
+	if *outputFile == "" || *inputFile == "" {
+		flag.Usage()
+		os.Exit(1)
+	}
+
+	pkgSet := make(map[string]bool)
+
+	reader, err := zip.OpenReader(*inputFile)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer reader.Close()
+
+	for _, f := range reader.File {
+		ext := filepath.Ext(f.Name)
+		if ext == ".java" || ext == ".class" {
+			pkgSet[fileToPackage(f.Name)] = true
+		}
+	}
+
+	var pkgs []string
+	for k := range pkgSet {
+		pkgs = append(pkgs, k)
+	}
+	sort.Strings(pkgs)
+
+	var data []byte
+	for _, pkg := range pkgs {
+		data = append(data, *prefix...)
+		data = append(data, pkg...)
+		data = append(data, "\n"...)
+	}
+
+	must(ioutil.WriteFile(*outputFile, data, 0666))
+}

java/aapt2.go

@@ -113,14 +113,17 @@ var aapt2LinkRule = pctx.AndroidStaticRule("aapt2Link",
 	blueprint.RuleParams{
 		Command: `${config.Aapt2Cmd} link -o $out $flags --java $genDir --proguard $proguardOptions ` +
 			`--output-text-symbols ${rTxt} $inFlags && ` +
-			`${config.SoongZipCmd} -write_if_changed -jar -o $genJar -C $genDir -D $genDir`,
+			`${config.SoongZipCmd} -write_if_changed -jar -o $genJar -C $genDir -D $genDir &&` +
+			`${config.ExtractJarPackagesCmd} -i $genJar -o $extraPackages --prefix '--extra-packages '`,
+
 		CommandDeps: []string{
 			"${config.Aapt2Cmd}",
 			"${config.SoongZipCmd}",
+			"${config.ExtractJarPackagesCmd}",
 		},
 		Restat: true,
 	},
-	"flags", "inFlags", "proguardOptions", "genDir", "genJar", "rTxt")
+	"flags", "inFlags", "proguardOptions", "genDir", "genJar", "rTxt", "extraPackages")
 
 var fileListToFileRule = pctx.AndroidStaticRule("fileListToFile",
 	blueprint.RuleParams{
@@ -130,7 +133,7 @@ var fileListToFileRule = pctx.AndroidStaticRule("fileListToFile",
 	})
 
 func aapt2Link(ctx android.ModuleContext,
-	packageRes, genJar, proguardOptions, rTxt android.WritablePath,
+	packageRes, genJar, proguardOptions, rTxt, extraPackages android.WritablePath,
 	flags []string, deps android.Paths,
 	compiledRes, compiledOverlay android.Paths) {
 
@@ -172,7 +175,7 @@ func aapt2Link(ctx android.ModuleContext,
 		Description:     "aapt2 link",
 		Implicits:       deps,
 		Output:          packageRes,
-		ImplicitOutputs: android.WritablePaths{proguardOptions, genJar, rTxt},
+		ImplicitOutputs: android.WritablePaths{proguardOptions, genJar, rTxt, extraPackages},
 		Args: map[string]string{
 			"flags":           strings.Join(flags, " "),
 			"inFlags":         strings.Join(inFlags, " "),
@@ -180,6 +183,7 @@ func aapt2Link(ctx android.ModuleContext,
 			"genDir":          genDir.String(),
 			"genJar":          genJar.String(),
 			"rTxt":            rTxt.String(),
+			"extraPackages":   extraPackages.String(),
 		},
 	})
 }

java/aar.go

@@ -26,6 +26,7 @@ type AndroidLibraryDependency interface {
 	Dependency
 	ExportPackage() android.Path
 	ExportedProguardFlagFiles() android.Paths
+	ExportedStaticPackages() android.Paths
 }
 
 func init() {
@@ -58,12 +59,13 @@ type aaptProperties struct {
 }
 
 type aapt struct {
-	aaptSrcJar          android.Path
-	exportPackage       android.Path
-	manifestPath        android.Path
-	proguardOptionsFile android.Path
-	rroDirs             android.Paths
-	rTxt                android.Path
+	aaptSrcJar            android.Path
+	exportPackage         android.Path
+	manifestPath          android.Path
+	proguardOptionsFile   android.Path
+	rroDirs               android.Paths
+	rTxt                  android.Path
+	extraAaptPackagesFile android.Path
 
 	aaptProperties aaptProperties
 }
@@ -123,9 +125,9 @@ func (a *aapt) aapt2Flags(ctx android.ModuleContext, sdkVersion string) (flags [
 	linkFlags = append(linkFlags, android.JoinWithPrefix(assetDirs.Strings(), "-A "))
 	linkDeps = append(linkDeps, assetFiles...)
 
-	staticLibs, libDeps, libFlags := aaptLibs(ctx, sdkVersion)
+	transitiveStaticLibs, libDeps, libFlags := aaptLibs(ctx, sdkVersion)
 
-	overlayFiles = append(overlayFiles, staticLibs...)
+	overlayFiles = append(overlayFiles, transitiveStaticLibs...)
 	linkDeps = append(linkDeps, libDeps...)
 	linkFlags = append(linkFlags, libFlags...)
 
@@ -178,6 +180,8 @@ func (a *aapt) buildActions(ctx android.ModuleContext, sdkVersion string, extraL
 	srcJar := android.PathForModuleGen(ctx, "R.jar")
 	proguardOptionsFile := android.PathForModuleGen(ctx, "proguard.options")
 	rTxt := android.PathForModuleOut(ctx, "R.txt")
+	// This file isn't used by Soong, but is generated for exporting
+	extraPackages := android.PathForModuleOut(ctx, "extra_packages")
 
 	var compiledRes, compiledOverlay android.Paths
 	for _, dir := range resDirs {
@@ -189,7 +193,7 @@ func (a *aapt) buildActions(ctx android.ModuleContext, sdkVersion string, extraL
 
 	compiledOverlay = append(compiledOverlay, overlayFiles...)
 
-	aapt2Link(ctx, packageRes, srcJar, proguardOptionsFile, rTxt,
+	aapt2Link(ctx, packageRes, srcJar, proguardOptionsFile, rTxt, extraPackages,
 		linkFlags, linkDeps, compiledRes, compiledOverlay)
 
 	a.aaptSrcJar = srcJar
@@ -197,11 +201,14 @@ func (a *aapt) buildActions(ctx android.ModuleContext, sdkVersion string, extraL
 	a.manifestPath = manifestPath
 	a.proguardOptionsFile = proguardOptionsFile
 	a.rroDirs = rroDirs
+	a.extraAaptPackagesFile = extraPackages
 	a.rTxt = rTxt
 }
 
 // aaptLibs collects libraries from dependencies and sdk_version and converts them into paths
-func aaptLibs(ctx android.ModuleContext, sdkVersion string) (staticLibs, deps android.Paths, flags []string) {
+func aaptLibs(ctx android.ModuleContext, sdkVersion string) (transitiveStaticLibs, deps android.Paths,
+	flags []string) {
+
 	var sharedLibs android.Paths
 
 	sdkDep := decodeSdkDep(ctx, sdkVersion)
@@ -211,7 +218,8 @@ func aaptLibs(ctx android.ModuleContext, sdkVersion string) (staticLibs, deps an
 
 	ctx.VisitDirectDeps(func(module android.Module) {
 		var exportPackage android.Path
-		if aarDep, ok := module.(AndroidLibraryDependency); ok {
+		aarDep, _ := module.(AndroidLibraryDependency)
+		if aarDep != nil {
 			exportPackage = aarDep.ExportPackage()
 		}
 
@@ -222,15 +230,16 @@ func aaptLibs(ctx android.ModuleContext, sdkVersion string) (staticLibs, deps an
 			}
 		case staticLibTag:
 			if exportPackage != nil {
-				staticLibs = append(staticLibs, exportPackage)
+				transitiveStaticLibs = append(transitiveStaticLibs, exportPackage)
+				transitiveStaticLibs = append(transitiveStaticLibs, aarDep.ExportedStaticPackages()...)
 			}
 		}
 	})
 
 	deps = append(deps, sharedLibs...)
-	deps = append(deps, staticLibs...)
+	deps = append(deps, transitiveStaticLibs...)
 
-	if len(staticLibs) > 0 {
+	if len(transitiveStaticLibs) > 0 {
 		flags = append(flags, "--auto-add-overlay")
 	}
 
@@ -238,7 +247,9 @@ func aaptLibs(ctx android.ModuleContext, sdkVersion string) (staticLibs, deps an
 		flags = append(flags, "-I "+sharedLib.String())
 	}
 
-	return staticLibs, deps, flags
+	transitiveStaticLibs = android.FirstUniquePaths(transitiveStaticLibs)
+
+	return transitiveStaticLibs, deps, flags
 }
 
 type AndroidLibrary struct {
@@ -250,12 +261,17 @@ type AndroidLibrary struct {
 	aarFile android.WritablePath
 
 	exportedProguardFlagFiles android.Paths
+	exportedStaticPackages    android.Paths
 }
 
 func (a *AndroidLibrary) ExportedProguardFlagFiles() android.Paths {
 	return a.exportedProguardFlagFiles
 }
 
+func (a *AndroidLibrary) ExportedStaticPackages() android.Paths {
+	return a.exportedStaticPackages
+}
+
 var _ AndroidLibraryDependency = (*AndroidLibrary)(nil)
 
 func (a *AndroidLibrary) DepsMutator(ctx android.BottomUpMutatorContext) {
@@ -290,10 +306,13 @@ func (a *AndroidLibrary) GenerateAndroidBuildActions(ctx android.ModuleContext)
 	ctx.VisitDirectDeps(func(m android.Module) {
 		if lib, ok := m.(AndroidLibraryDependency); ok && ctx.OtherModuleDependencyTag(m) == staticLibTag {
 			a.exportedProguardFlagFiles = append(a.exportedProguardFlagFiles, lib.ExportedProguardFlagFiles()...)
+			a.exportedStaticPackages = append(a.exportedStaticPackages, lib.ExportPackage())
+			a.exportedStaticPackages = append(a.exportedStaticPackages, lib.ExportedStaticPackages()...)
 		}
 	})
 
 	a.exportedProguardFlagFiles = android.FirstUniquePaths(a.exportedProguardFlagFiles)
+	a.exportedStaticPackages = android.FirstUniquePaths(a.exportedStaticPackages)
 }
 
 func AndroidLibraryFactory() android.Module {
@@ -331,9 +350,12 @@ type AARImport struct {
 
 	properties AARImportProperties
 
-	classpathFile android.WritablePath
-	proguardFlags android.WritablePath
-	exportPackage android.WritablePath
+	classpathFile         android.WritablePath
+	proguardFlags         android.WritablePath
+	exportPackage         android.WritablePath
+	extraAaptPackagesFile android.WritablePath
+
+	exportedStaticPackages android.Paths
 }
 
 var _ AndroidLibraryDependency = (*AARImport)(nil)
@@ -346,6 +368,10 @@ func (a *AARImport) ExportedProguardFlagFiles() android.Paths {
 	return android.Paths{a.proguardFlags}
 }
 
+func (a *AARImport) ExportedStaticPackages() android.Paths {
+	return a.exportedStaticPackages
+}
+
 func (a *AARImport) Prebuilt() *android.Prebuilt {
 	return &a.prebuilt
 }
@@ -362,7 +388,7 @@ func (a *AARImport) DepsMutator(ctx android.BottomUpMutatorContext) {
 		}
 	}
 
-	ctx.AddDependency(ctx.Module(), staticLibTag, a.properties.Libs...)
+	ctx.AddDependency(ctx.Module(), libTag, a.properties.Libs...)
 	ctx.AddDependency(ctx.Module(), staticLibTag, a.properties.Static_libs...)
 }
 
@@ -410,6 +436,7 @@ func (a *AARImport) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 	srcJar := android.PathForModuleGen(ctx, "R.jar")
 	proguardOptionsFile := android.PathForModuleGen(ctx, "proguard.options")
 	rTxt := android.PathForModuleOut(ctx, "R.txt")
+	a.extraAaptPackagesFile = android.PathForModuleOut(ctx, "extra_packages")
 
 	var linkDeps android.Paths
 
@@ -422,14 +449,14 @@ func (a *AARImport) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 	linkFlags = append(linkFlags, "--manifest "+manifest.String())
 	linkDeps = append(linkDeps, manifest)
 
-	staticLibs, libDeps, libFlags := aaptLibs(ctx, String(a.properties.Sdk_version))
+	transitiveStaticLibs, libDeps, libFlags := aaptLibs(ctx, String(a.properties.Sdk_version))
 
 	linkDeps = append(linkDeps, libDeps...)
 	linkFlags = append(linkFlags, libFlags...)
 
-	overlayRes := append(android.Paths{flata}, staticLibs...)
+	overlayRes := append(android.Paths{flata}, transitiveStaticLibs...)
 
-	aapt2Link(ctx, a.exportPackage, srcJar, proguardOptionsFile, rTxt,
+	aapt2Link(ctx, a.exportPackage, srcJar, proguardOptionsFile, rTxt, a.extraAaptPackagesFile,
 		linkFlags, linkDeps, nil, overlayRes)
 }
 

java/androidmk.go

@@ -135,6 +135,7 @@ func (prebuilt *AARImport) AndroidMk() android.AndroidMkData {
 				fmt.Fprintln(w, "LOCAL_SOONG_HEADER_JAR :=", prebuilt.classpathFile.String())
 				fmt.Fprintln(w, "LOCAL_SOONG_RESOURCE_EXPORT_PACKAGE :=", prebuilt.exportPackage.String())
 				fmt.Fprintln(w, "LOCAL_SOONG_EXPORT_PROGUARD_FLAGS :=", prebuilt.proguardFlags.String())
+				fmt.Fprintln(w, "LOCAL_SOONG_STATIC_LIBRARY_EXTRA_PACKAGES :=", prebuilt.extraAaptPackagesFile.String())
 				fmt.Fprintln(w, "LOCAL_SDK_VERSION :=", String(prebuilt.properties.Sdk_version))
 			},
 		},
@@ -243,6 +244,7 @@ func (a *AndroidLibrary) AndroidMk() android.AndroidMkData {
 		}
 
 		fmt.Fprintln(w, "LOCAL_SOONG_RESOURCE_EXPORT_PACKAGE :=", a.exportPackage.String())
+		fmt.Fprintln(w, "LOCAL_SOONG_STATIC_LIBRARY_EXTRA_PACKAGES :=", a.extraAaptPackagesFile.String())
 		fmt.Fprintln(w, "LOCAL_FULL_MANIFEST_FILE :=", a.manifestPath.String())
 		fmt.Fprintln(w, "LOCAL_SOONG_EXPORT_PROGUARD_FLAGS :=",
 			strings.Join(a.exportedProguardFlagFiles.Strings(), " "))

java/app.go

@@ -67,6 +67,10 @@ func (a *AndroidApp) ExportedProguardFlagFiles() android.Paths {
 	return nil
 }
 
+func (a *AndroidApp) ExportedStaticPackages() android.Paths {
+	return nil
+}
+
 var _ AndroidLibraryDependency = (*AndroidApp)(nil)
 
 type certificate struct {

java/config/config.go

@@ -85,6 +85,7 @@ func init() {
 	pctx.SourcePathVariable("GenKotlinBuildFileCmd", "build/soong/scripts/gen-kotlin-build-file.sh")
 
 	pctx.SourcePathVariable("JarArgsCmd", "build/soong/scripts/jar-args.sh")
+	pctx.HostBinToolVariable("ExtractJarPackagesCmd", "extract_jar_packages")
 	pctx.HostBinToolVariable("SoongZipCmd", "soong_zip")
 	pctx.HostBinToolVariable("MergeZipsCmd", "merge_zips")
 	pctx.HostBinToolVariable("Zip2ZipCmd", "zip2zip")

java/config/makevars.go

@@ -77,4 +77,6 @@ func makeVarsProvider(ctx android.MakeVarsContext) {
 
 	ctx.Strict("JACOCO_CLI_JAR", "${JacocoCLIJar}")
 	ctx.Strict("DEFAULT_JACOCO_EXCLUDE_FILTER", strings.Join(DefaultJacocoExcludeFilter, ","))
+
+	ctx.Strict("EXTRACT_JAR_PACKAGES", "${ExtractJarPackagesCmd}")
 }