From 205e91183ea1dd0508a2b8726cd984059b5c963f Mon Sep 17 00:00:00 2001
From: Colin Cross <ccross@android.com>
Date: Thu, 6 Aug 2020 13:20:17 -0700
Subject: [PATCH] Merge libs/ directory of imported aars into classes.jar

AARs can provide extra classes in the libs/ directory that should
be treated the same as classes.jar, merge them into a single jar
when extracting the AAR.

Bug: 162892721
Test: m androidx.appsearch_appsearch
Change-Id: I92bf46f47ce5f3dce16c42197c15ed256304fda2
---
 java/aar.go | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/java/aar.go b/java/aar.go
index ad9b5e7d2..cbb624850 100644
--- a/java/aar.go
+++ b/java/aar.go
@@ -641,9 +641,11 @@ func (a *AARImport) DepsMutator(ctx android.BottomUpMutatorContext) {
 var unzipAAR = pctx.AndroidStaticRule("unzipAAR",
 	blueprint.RuleParams{
 		Command: `rm -rf $outDir && mkdir -p $outDir && ` +
-			`unzip -qoDD -d $outDir $in && rm -rf $outDir/res && touch $out`,
+			`unzip -qoDD -d $outDir $in && rm -rf $outDir/res && touch $out && ` +
+			`${config.MergeZipsCmd} $combinedClassesJar $$(ls $outDir/classes.jar 2> /dev/null) $$(ls $outDir/libs/*.jar 2> /dev/null)`,
+		CommandDeps: []string{"${config.MergeZipsCmd}"},
 	},
-	"outDir")
+	"outDir", "combinedClassesJar")
 
 func (a *AARImport) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 	if len(a.properties.Aars) != 1 {
@@ -661,7 +663,7 @@ func (a *AARImport) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 	}
 
 	extractedAARDir := android.PathForModuleOut(ctx, "aar")
-	a.classpathFile = extractedAARDir.Join(ctx, "classes.jar")
+	a.classpathFile = extractedAARDir.Join(ctx, "classes-combined.jar")
 	a.proguardFlags = extractedAARDir.Join(ctx, "proguard.txt")
 	a.manifest = extractedAARDir.Join(ctx, "AndroidManifest.xml")
 
@@ -671,7 +673,8 @@ func (a *AARImport) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 		Outputs:     android.WritablePaths{a.classpathFile, a.proguardFlags, a.manifest},
 		Description: "unzip AAR",
 		Args: map[string]string{
-			"outDir": extractedAARDir.String(),
+			"outDir":             extractedAARDir.String(),
+			"combinedClassesJar": a.classpathFile.String(),
 		},
 	})