aapt2: Add command to rename overlay "targetPackage" attribute

Bug: 154960712
Test: atest ManifestFixerTest
Change-Id: I556fc11e271337de40c70d4ed56a0381a2f79712

tools/aapt2/cmd/Link.h

@@ -263,6 +263,10 @@ class LinkCommand : public Command {
         "Changes the name of the target package for instrumentation. Most useful\n"
             "when used in conjunction with --rename-manifest-package.",
         &options_.manifest_fixer_options.rename_instrumentation_target_package);
+    AddOptionalFlag("--rename-overlay-target-package",
+        "Changes the name of the target package for overlay. Most useful\n"
+            "when used in conjunction with --rename-manifest-package.",
+        &options_.manifest_fixer_options.rename_overlay_target_package);
     AddOptionalFlagList("-0", "File suffix not to compress.",
         &options_.extensions_to_not_compress);
     AddOptionalSwitch("--no-compress", "Do not compress any resources.",

tools/aapt2/link/ManifestFixer.cpp

@@ -263,6 +263,16 @@ bool ManifestFixer::BuildRules(xml::XmlActionExecutor* executor,
     }
   }
 
+  if (options_.rename_overlay_target_package) {
+    if (!util::IsJavaPackageName(options_.rename_overlay_target_package.value())) {
+      diag->Error(DiagMessage()
+                  << "invalid overlay target package override '"
+                  << options_.rename_overlay_target_package.value()
+                  << "'");
+      return false;
+    }
+  }
+
   // Common <intent-filter> actions.
   xml::XmlNodeAction intent_filter_action;
   intent_filter_action["action"].Action(RequiredNameIsNotEmpty);
@@ -373,7 +383,17 @@ bool ManifestFixer::BuildRules(xml::XmlActionExecutor* executor,
   manifest_action["attribution"];
   manifest_action["attribution"]["inherit-from"];
   manifest_action["original-package"];
-  manifest_action["overlay"];
+  manifest_action["overlay"].Action([&](xml::Element* el) -> bool {
+    if (!options_.rename_overlay_target_package) {
+      return true;
+    }
+
+    if (xml::Attribute* attr =
+            el->FindAttribute(xml::kSchemaAndroid, "targetPackage")) {
+      attr->value = options_.rename_overlay_target_package.value();
+    }
+    return true;
+  });
   manifest_action["protected-broadcast"];
   manifest_action["adopt-permissions"];
   manifest_action["uses-permission"];

tools/aapt2/link/ManifestFixer.h

@@ -44,6 +44,10 @@ struct ManifestFixerOptions {
   // <instrumentation>.
   Maybe<std::string> rename_instrumentation_target_package;
 
+  // The Android package to use instead of the one defined in 'android:targetPackage' in
+  // <overlay>.
+  Maybe<std::string> rename_overlay_target_package;
+
   // The version name to set if 'android:versionName' is not defined in <manifest> or if
   // replace_version is set.
   Maybe<std::string> version_name_default;

tools/aapt2/link/ManifestFixer_test.cpp

@@ -325,6 +325,32 @@ TEST_F(ManifestFixerTest,
   EXPECT_THAT(attr->value, StrEq("com.android"));
 }
 
+TEST_F(ManifestFixerTest,
+       RenameManifestOverlayPackageAndFullyQualifyTarget) {
+  ManifestFixerOptions options;
+  options.rename_overlay_target_package = std::string("com.android");
+
+  std::unique_ptr<xml::XmlResource> doc = VerifyWithOptions(R"EOF(
+      <manifest xmlns:android="http://schemas.android.com/apk/res/android"
+                package="android">
+        <overlay android:targetName="Customization" android:targetPackage="android" />
+      </manifest>)EOF",
+                                                            options);
+  ASSERT_THAT(doc, NotNull());
+
+  xml::Element* manifest_el = doc->root.get();
+  ASSERT_THAT(manifest_el, NotNull());
+
+  xml::Element* overlay_el =
+      manifest_el->FindChild({}, "overlay");
+  ASSERT_THAT(overlay_el, NotNull());
+
+  xml::Attribute* attr =
+      overlay_el->FindAttribute(xml::kSchemaAndroid, "targetPackage");
+  ASSERT_THAT(attr, NotNull());
+  EXPECT_THAT(attr->value, StrEq("com.android"));
+}
+
 TEST_F(ManifestFixerTest, UseDefaultVersionNameAndCode) {
   ManifestFixerOptions options;
   options.version_name_default = std::string("Beta");