Add --no-compile-sdk-metadata switch to AAPT2

This switch suppresses output of compile SDK-related attributes
in AndroidManifest.xml, including android:compileSdkVersion and
platformBuildVersion.

Fixes: 278115511
Test: ManifestFixer_test
Merged-In: I552e50802a328c2318c9f261e30beadcbca5fd29
Change-Id: I552e50802a328c2318c9f261e30beadcbca5fd29

Author: alanv

tools/aapt2/cmd/Link.h

@@ -206,6 +206,11 @@ class LinkCommand : public Command {
     AddOptionalFlag("--compile-sdk-version-name",
         "Version name to inject into the AndroidManifest.xml if none is present.",
         &options_.manifest_fixer_options.compile_sdk_version_codename);
+    AddOptionalSwitch(
+        "--no-compile-sdk-metadata",
+        "Suppresses output of compile SDK-related attributes in AndroidManifest.xml,\n"
+        "including android:compileSdkVersion and platformBuildVersion.",
+        &options_.manifest_fixer_options.no_compile_sdk_metadata);
     AddOptionalSwitch("--shared-lib", "Generates a shared Android runtime library.",
         &shared_lib_);
     AddOptionalSwitch("--static-lib", "Generate a static Android library.", &static_lib_);

tools/aapt2/link/ManifestFixer.cpp

@@ -635,7 +635,7 @@ bool ManifestFixer::Consume(IAaptContext* context, xml::XmlResource* doc) {
     root->InsertChild(0, std::move(uses_sdk));
   }
 
-  if (options_.compile_sdk_version) {
+  if (!options_.no_compile_sdk_metadata && options_.compile_sdk_version) {
     xml::Attribute* attr = root->FindOrCreateAttribute(xml::kSchemaAndroid, "compileSdkVersion");
 
     // Make sure we un-compile the value if it was set to something else.
@@ -647,10 +647,9 @@ bool ManifestFixer::Consume(IAaptContext* context, xml::XmlResource* doc) {
     // Make sure we un-compile the value if it was set to something else.
     attr->compiled_value = {};
     attr->value = options_.compile_sdk_version.value();
-
   }
 
-  if (options_.compile_sdk_version_codename) {
+  if (!options_.no_compile_sdk_metadata && options_.compile_sdk_version_codename) {
     xml::Attribute* attr =
         root->FindOrCreateAttribute(xml::kSchemaAndroid, "compileSdkVersionCodename");
 

tools/aapt2/link/ManifestFixer.h

@@ -68,11 +68,12 @@ struct ManifestFixerOptions {
   std::optional<std::string> revision_code_default;
 
   // The version of the framework being compiled against to set for 'android:compileSdkVersion' in
-  // the <manifest> tag.
+  // the <manifest> tag. Not used if no_compile_sdk_metadata is set.
   std::optional<std::string> compile_sdk_version;
 
   // The version codename of the framework being compiled against to set for
-  // 'android:compileSdkVersionCodename' in the <manifest> tag.
+  // 'android:compileSdkVersionCodename' in the <manifest> tag. Not used if no_compile_sdk_metadata
+  // is set.
   std::optional<std::string> compile_sdk_version_codename;
 
   // Whether validation errors should be treated only as warnings. If this is 'true', then an
@@ -85,6 +86,9 @@ struct ManifestFixerOptions {
 
   // Whether to replace the manifest version with the the command line version
   bool replace_version = false;
+
+  // Whether to suppress `android:compileSdkVersion*` and `platformBuildVersion*` attributes.
+  bool no_compile_sdk_metadata = false;
 };
 
 // Verifies that the manifest is correctly formed and inserts defaults where specified with

tools/aapt2/link/ManifestFixer_test.cpp

@@ -892,6 +892,35 @@ TEST_F(ManifestFixerTest, InsertCompileSdkVersions) {
   EXPECT_THAT(attr->value, StrEq("P"));
 }
 
+TEST_F(ManifestFixerTest, DoNotInsertCompileSdkVersions) {
+  std::string input = R"(<manifest package="com.pkg" />)";
+  ManifestFixerOptions options;
+  options.no_compile_sdk_metadata = true;
+  options.compile_sdk_version = {"28"};
+  options.compile_sdk_version_codename = {"P"};
+
+  std::unique_ptr<xml::XmlResource> manifest = VerifyWithOptions(input, options);
+  ASSERT_THAT(manifest, NotNull());
+
+  // There should be a declaration of kSchemaAndroid, even when the input
+  // didn't have one.
+  EXPECT_EQ(manifest->root->namespace_decls.size(), 1);
+  EXPECT_EQ(manifest->root->namespace_decls[0].prefix, "android");
+  EXPECT_EQ(manifest->root->namespace_decls[0].uri, xml::kSchemaAndroid);
+
+  xml::Attribute* attr = manifest->root->FindAttribute(xml::kSchemaAndroid, "compileSdkVersion");
+  ASSERT_THAT(attr, IsNull());
+
+  attr = manifest->root->FindAttribute(xml::kSchemaAndroid, "compileSdkVersionCodename");
+  ASSERT_THAT(attr, IsNull());
+
+  attr = manifest->root->FindAttribute("", "platformBuildVersionCode");
+  ASSERT_THAT(attr, IsNull());
+
+  attr = manifest->root->FindAttribute("", "platformBuildVersionName");
+  ASSERT_THAT(attr, IsNull());
+}
+
 TEST_F(ManifestFixerTest, OverrideCompileSdkVersions) {
   std::string input = R"(
       <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="android"