Don't write transitive dependencies to Android-${TARGET_PRODUCT}.mk

Java libraries were writing lists of files that changed whenever
transitive dependencies changed to Android-${TARGET_PRODUCT}.mk, causing
Kati analysis to rerun whenever a dependency was changed in Soong.
In both cases, Make would immediately use the list to write a single
output file.  Write the files in Soong and pass the path to the file
to Make instead, which will both reduce the size of
Android-${TARGET_PRODUCT}.mk and skip Kati analysis more often.

Bug: 309006256
Test: m checkbuild
Change-Id: I5dff16c6fb7cca8c6da927b37c612c7b1d0954e6

java/aar.go

@@ -17,6 +17,7 @@ package java
 import (
 	"fmt"
 	"path/filepath"
+	"slices"
 	"strconv"
 	"strings"
 
@@ -110,7 +111,7 @@ type aaptProperties struct {
 type aapt struct {
 	aaptSrcJar                         android.Path
 	transitiveAaptRJars                android.Paths
-	transitiveAaptResourcePackages android.Paths
+	transitiveAaptResourcePackagesFile android.Path
 	exportPackage                      android.Path
 	manifestPath                       android.Path
 	proguardOptionsFile                android.Path
@@ -552,9 +553,16 @@ func (a *aapt) buildActions(ctx android.ModuleContext, opts aaptBuildActionOptio
 		aapt2ExtractExtraPackages(ctx, extraPackages, srcJar)
 	}
 
+	transitiveAaptResourcePackages := staticDeps.resPackages().Strings()
+	transitiveAaptResourcePackages = slices.DeleteFunc(transitiveAaptResourcePackages, func(p string) bool {
+		return p == packageRes.String()
+	})
+	transitiveAaptResourcePackagesFile := android.PathForModuleOut(ctx, "transitive-res-packages")
+	android.WriteFileRule(ctx, transitiveAaptResourcePackagesFile, strings.Join(transitiveAaptResourcePackages, "\n"))
+
 	a.aaptSrcJar = srcJar
 	a.transitiveAaptRJars = transitiveRJars
-	a.transitiveAaptResourcePackages = staticDeps.resPackages()
+	a.transitiveAaptResourcePackagesFile = transitiveAaptResourcePackagesFile
 	a.exportPackage = packageRes
 	a.manifestPath = manifestPath
 	a.proguardOptionsFile = proguardOptionsFile
@@ -820,9 +828,13 @@ func (a *AndroidLibrary) GenerateAndroidBuildActions(ctx android.ModuleContext)
 
 	proguardSpecInfo := a.collectProguardSpecInfo(ctx)
 	ctx.SetProvider(ProguardSpecInfoProvider, proguardSpecInfo)
-	a.exportedProguardFlagFiles = proguardSpecInfo.ProguardFlagsFiles.ToList()
-	a.extraProguardFlagFiles = append(a.extraProguardFlagFiles, a.exportedProguardFlagFiles...)
-	a.extraProguardFlagFiles = append(a.extraProguardFlagFiles, a.proguardOptionsFile)
+	exportedProguardFlagsFiles := proguardSpecInfo.ProguardFlagsFiles.ToList()
+	a.extraProguardFlagsFiles = append(a.extraProguardFlagsFiles, exportedProguardFlagsFiles...)
+	a.extraProguardFlagsFiles = append(a.extraProguardFlagsFiles, a.proguardOptionsFile)
+
+	combinedExportedProguardFlagFile := android.PathForModuleOut(ctx, "export_proguard_flags")
+	writeCombinedProguardFlagsFile(ctx, combinedExportedProguardFlagFile, exportedProguardFlagsFiles)
+	a.combinedExportedProguardFlagsFile = combinedExportedProguardFlagFile
 
 	var extraSrcJars android.Paths
 	var extraCombinedJars android.Paths
@@ -943,7 +955,7 @@ type AARImport struct {
 	classpathFile                      android.WritablePath
 	proguardFlags                      android.WritablePath
 	exportPackage                      android.WritablePath
-	transitiveAaptResourcePackages android.Paths
+	transitiveAaptResourcePackagesFile android.Path
 	extraAaptPackagesFile              android.WritablePath
 	manifest                           android.WritablePath
 	assetsPackage                      android.WritablePath
@@ -1211,7 +1223,13 @@ func (a *AARImport) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 	_ = staticManifestsDepSet
 	a.manifestsDepSet = manifestDepSetBuilder.Build()
 
-	a.transitiveAaptResourcePackages = staticDeps.resPackages()
+	transitiveAaptResourcePackages := staticDeps.resPackages().Strings()
+	transitiveAaptResourcePackages = slices.DeleteFunc(transitiveAaptResourcePackages, func(p string) bool {
+		return p == a.exportPackage.String()
+	})
+	transitiveAaptResourcePackagesFile := android.PathForModuleOut(ctx, "transitive-res-packages")
+	android.WriteFileRule(ctx, transitiveAaptResourcePackagesFile, strings.Join(transitiveAaptResourcePackages, "\n"))
+	a.transitiveAaptResourcePackagesFile = transitiveAaptResourcePackagesFile
 
 	a.collectTransitiveHeaderJars(ctx)
 	ctx.SetProvider(JavaInfoProvider, JavaInfo{

java/androidmk.go

@@ -274,7 +274,7 @@ func (prebuilt *AARImport) AndroidMkEntries() []android.AndroidMkEntries {
 				entries.SetPath("LOCAL_SOONG_HEADER_JAR", prebuilt.classpathFile)
 				entries.SetPath("LOCAL_SOONG_CLASSES_JAR", prebuilt.classpathFile)
 				entries.SetPath("LOCAL_SOONG_RESOURCE_EXPORT_PACKAGE", prebuilt.exportPackage)
-				entries.SetPaths("LOCAL_SOONG_TRANSITIVE_RES_PACKAGES", prebuilt.transitiveAaptResourcePackages)
+				entries.SetPath("LOCAL_SOONG_TRANSITIVE_RES_PACKAGES", prebuilt.transitiveAaptResourcePackagesFile)
 				entries.SetPath("LOCAL_SOONG_EXPORT_PROGUARD_FLAGS", prebuilt.proguardFlags)
 				entries.SetPath("LOCAL_SOONG_STATIC_LIBRARY_EXTRA_PACKAGES", prebuilt.extraAaptPackagesFile)
 				entries.SetPath("LOCAL_FULL_MANIFEST_FILE", prebuilt.manifest)
@@ -532,10 +532,10 @@ func (a *AndroidLibrary) AndroidMkEntries() []android.AndroidMkEntries {
 		}
 
 		entries.SetPath("LOCAL_SOONG_RESOURCE_EXPORT_PACKAGE", a.exportPackage)
-		entries.SetPaths("LOCAL_SOONG_TRANSITIVE_RES_PACKAGES", a.transitiveAaptResourcePackages)
+		entries.SetPath("LOCAL_SOONG_TRANSITIVE_RES_PACKAGES", a.transitiveAaptResourcePackagesFile)
 		entries.SetPath("LOCAL_SOONG_STATIC_LIBRARY_EXTRA_PACKAGES", a.extraAaptPackagesFile)
 		entries.SetPath("LOCAL_FULL_MANIFEST_FILE", a.mergedManifestFile)
-		entries.AddStrings("LOCAL_SOONG_EXPORT_PROGUARD_FLAGS", a.exportedProguardFlagFiles.Strings()...)
+		entries.SetPath("LOCAL_SOONG_EXPORT_PROGUARD_FLAGS", a.combinedExportedProguardFlagsFile)
 		entries.SetBoolIfTrue("LOCAL_UNINSTALLABLE_MODULE", true)
 		entries.SetOptionalPaths("LOCAL_ACONFIG_FILES", a.getTransitiveAconfigFiles().ToList())
 	})

java/app.go

@@ -526,8 +526,8 @@ func (a *AndroidApp) proguardBuildActions(ctx android.ModuleContext) {
 
 	staticLibProguardFlagFiles = android.FirstUniquePaths(staticLibProguardFlagFiles)
 
-	a.Module.extraProguardFlagFiles = append(a.Module.extraProguardFlagFiles, staticLibProguardFlagFiles...)
-	a.Module.extraProguardFlagFiles = append(a.Module.extraProguardFlagFiles, a.proguardOptionsFile)
+	a.Module.extraProguardFlagsFiles = append(a.Module.extraProguardFlagsFiles, staticLibProguardFlagFiles...)
+	a.Module.extraProguardFlagsFiles = append(a.Module.extraProguardFlagsFiles, a.proguardOptionsFile)
 }
 
 func (a *AndroidApp) installPath(ctx android.ModuleContext) android.InstallPath {

java/base.go

@@ -1615,7 +1615,7 @@ func (j *Module) compile(ctx android.ModuleContext, extraSrcJars, extraClasspath
 	if ctx.Device() && (Bool(j.properties.Installable) || Bool(compileDex)) {
 		if j.hasCode(ctx) {
 			if j.shouldInstrumentStatic(ctx) {
-				j.dexer.extraProguardFlagFiles = append(j.dexer.extraProguardFlagFiles,
+				j.dexer.extraProguardFlagsFiles = append(j.dexer.extraProguardFlagsFiles,
 					android.PathForSource(ctx, "build/make/core/proguard.jacoco.flags"))
 			}
 			// Dex compilation

java/builder.go

@@ -264,6 +264,16 @@ var (
 			Command:     `${config.Zip2ZipCmd} -i ${in} -o ${out} -x 'META-INF/services/**/*'`,
 			CommandDeps: []string{"${config.Zip2ZipCmd}"},
 		})
+
+	writeCombinedProguardFlagsFileRule = pctx.AndroidStaticRule("writeCombinedProguardFlagsFileRule",
+		blueprint.RuleParams{
+			Command: `rm -f $out && ` +
+				`for f in $in; do ` +
+				` echo  && ` +
+				` echo "# including $$f" && ` +
+				` cat $$f; ` +
+				`done > $out`,
+		})
 )
 
 func init() {
@@ -686,6 +696,15 @@ func TransformZipAlign(ctx android.ModuleContext, outputFile android.WritablePat
 	})
 }
 
+func writeCombinedProguardFlagsFile(ctx android.ModuleContext, outputFile android.WritablePath, files android.Paths) {
+	ctx.Build(pctx, android.BuildParams{
+		Rule:        writeCombinedProguardFlagsFileRule,
+		Description: "write combined proguard flags file",
+		Inputs:      files,
+		Output:      outputFile,
+	})
+}
+
 type classpath android.Paths
 
 func (x *classpath) formJoinedClassPath(optName string, sep string) string {

java/dex.go

@@ -91,7 +91,7 @@ type dexer struct {
 	dexProperties DexProperties
 
 	// list of extra proguard flag files
-	extraProguardFlagFiles android.Paths
+	extraProguardFlagsFiles android.Paths
 	proguardDictionary      android.OptionalPath
 	proguardConfiguration   android.OptionalPath
 	proguardUsageZip        android.OptionalPath
@@ -301,7 +301,7 @@ func (d *dexer) r8Flags(ctx android.ModuleContext, flags javaBuilderFlags) (r8Fl
 		android.PathForSource(ctx, "build/make/core/proguard.flags"),
 	}
 
-	flagFiles = append(flagFiles, d.extraProguardFlagFiles...)
+	flagFiles = append(flagFiles, d.extraProguardFlagsFiles...)
 	// TODO(ccross): static android library proguard files
 
 	flagFiles = append(flagFiles, android.PathsForModuleSrc(ctx, opt.Proguard_flags_files)...)

java/java.go

@@ -639,7 +639,7 @@ func normalizeJavaVersion(ctx android.BaseModuleContext, javaVersion string) jav
 type Library struct {
 	Module
 
-	exportedProguardFlagFiles android.Paths
+	combinedExportedProguardFlagsFile android.Path
 
 	InstallMixin func(ctx android.ModuleContext, installPath android.Path) (extraInstallDeps android.InstallPaths)
 }
@@ -700,8 +700,12 @@ func (j *Library) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 
 	proguardSpecInfo := j.collectProguardSpecInfo(ctx)
 	ctx.SetProvider(ProguardSpecInfoProvider, proguardSpecInfo)
-	j.exportedProguardFlagFiles = proguardSpecInfo.ProguardFlagsFiles.ToList()
-	j.extraProguardFlagFiles = append(j.extraProguardFlagFiles, j.exportedProguardFlagFiles...)
+	exportedProguardFlagsFiles := proguardSpecInfo.ProguardFlagsFiles.ToList()
+	j.extraProguardFlagsFiles = append(j.extraProguardFlagsFiles, exportedProguardFlagsFiles...)
+
+	combinedExportedProguardFlagFile := android.PathForModuleOut(ctx, "export_proguard_flags")
+	writeCombinedProguardFlagsFile(ctx, combinedExportedProguardFlagFile, exportedProguardFlagsFiles)
+	j.combinedExportedProguardFlagsFile = combinedExportedProguardFlagFile
 
 	apexInfo := ctx.Provider(android.ApexInfoProvider).(android.ApexInfo)
 	if !apexInfo.IsForPlatform() {