Revert "let NOTICES be double gzip wrapped to reduce on-disk installe…

…d space (#71899)"

This reverts commit 4ed3432.

dev/devicelab/bin/tasks/module_test.dart

@@ -2,11 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'dart:convert';
 import 'dart:io';
-import 'dart:typed_data';
 
-import 'package:archive/archive.dart';
 import 'package:flutter_devicelab/framework/apk_utils.dart';
 import 'package:flutter_devicelab/framework/framework.dart';
 import 'package:flutter_devicelab/framework/task_result.dart';
@@ -317,24 +314,6 @@ Future<void> main() async {
         'lib/armeabi-v7a/libflutter.so',
       ], await getFilesInApk(releaseHostApk));
 
-      section('Check the NOTICE file is correct');
-
-      await inDirectory(hostApp, () async {
-        final File apkFile = File(releaseHostApk);
-        final Archive apk = ZipDecoder().decodeBytes(apkFile.readAsBytesSync());
-        // Shouldn't be missing since we already checked it exists above.
-        final ArchiveFile noticesFile = apk.findFile('assets/flutter_assets/NOTICES.Z');
-
-        final Uint8List licenseData = noticesFile.content as Uint8List;
-        if (licenseData == null) {
-          return TaskResult.failure('Invalid license file.');
-        }
-        final String licenseString = utf8.decode(gzip.decode(licenseData));
-        if (!licenseString.contains('skia') || !licenseString.contains('Flutter Authors')) {
-          return TaskResult.failure('License content missing.');
-        }
-      });
-
       section('Check release AndroidManifest.xml');
 
       final String androidManifestRelease = await getAndroidManifest(debugHostApk);

dev/devicelab/bin/tasks/module_test_ios.dart

@@ -2,9 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'dart:convert';
 import 'dart:io';
-import 'dart:typed_data';
 
 import 'package:flutter_devicelab/framework/framework.dart';
 import 'package:flutter_devicelab/framework/ios.dart';
@@ -214,8 +212,6 @@ Future<void> main() async {
 
       final File objectiveCAnalyticsOutputFile = File(path.join(tempDir.path, 'analytics-objc.log'));
       final Directory objectiveCBuildDirectory = Directory(path.join(tempDir.path, 'build-objc'));
-
-      section('Build iOS Objective-C host app');
       await inDirectory(objectiveCHostApp, () async {
         await exec(
           'pod',
@@ -272,28 +268,6 @@ Future<void> main() async {
         'isolate_snapshot_data',
       ));
 
-      section('Check the NOTICE file is correct');
-
-      final String licenseFilePath = path.join(
-        objectiveCBuildDirectory.path,
-        'Host.app',
-        'Frameworks',
-        'App.framework',
-        'flutter_assets',
-        'NOTICES.Z',
-      );
-      checkFileExists(licenseFilePath);
-
-      await inDirectory(objectiveCBuildDirectory, () async {
-        final Uint8List licenseData = File(licenseFilePath).readAsBytesSync();
-        final String licenseString = utf8.decode(gzip.decode(licenseData));
-        if (!licenseString.contains('skia') || !licenseString.contains('Flutter Authors')) {
-          return TaskResult.failure('License content missing');
-        }
-      });
-
-      section('Check that the host build sends the correct analytics');
-
       final String objectiveCAnalyticsOutput = objectiveCAnalyticsOutputFile.readAsStringSync();
       if (!objectiveCAnalyticsOutput.contains('cd24: ios')
           || !objectiveCAnalyticsOutput.contains('cd25: true')

dev/devicelab/lib/framework/apk_utils.dart

@@ -13,7 +13,7 @@ final String platformLineSep = Platform.isWindows ? '\r\n' : '\n';
 
 final List<String> flutterAssets = <String>[
   'assets/flutter_assets/AssetManifest.json',
-  'assets/flutter_assets/NOTICES.Z',
+  'assets/flutter_assets/NOTICES',
   'assets/flutter_assets/fonts/MaterialIcons-Regular.otf',
   'assets/flutter_assets/packages/cupertino_icons/assets/CupertinoIcons.ttf',
 ];

dev/devicelab/lib/tasks/perf_tests.dart

@@ -1070,7 +1070,7 @@ class CompileTest {
 
     final _UnzipListEntry libflutter = fileToMetadata['lib/armeabi-v7a/libflutter.so'];
     final _UnzipListEntry libapp = fileToMetadata['lib/armeabi-v7a/libapp.so'];
-    final _UnzipListEntry license = fileToMetadata['assets/flutter_assets/NOTICES.Z'];
+    final _UnzipListEntry license = fileToMetadata['assets/flutter_assets/NOTICES'];
 
     return <String, dynamic>{
       'libflutter_uncompressed_bytes': libflutter.uncompressedSize,

dev/integration_tests/flutter_gallery/test/example_code_parser_test.dart

@@ -46,7 +46,7 @@ class TestAssetBundle extends AssetBundle {
   }
 
   @override
-  Future<String> loadString(String key, { bool cache = true, bool unzip = false }) async {
+  Future<String> loadString(String key, { bool cache = true }) async {
     if (key == 'lib/gallery/example_code.dart')
       return testCodeFile;
     return '';

packages/flutter/lib/src/services/asset_bundle.dart

@@ -64,16 +64,7 @@ abstract class AssetBundle {
   /// caller is going to be doing its own caching. (It might not be cached if
   /// it's set to true either, that depends on the asset bundle
   /// implementation.)
-  ///
-  /// If the `unzip` argument is set to true, it would first unzip file at the
-  /// specified location before retrieving the string content.
-  Future<String> loadString(
-    String key,
-    {
-      bool cache = true,
-      bool unzip = false,
-    }
-  ) async {
+  Future<String> loadString(String key, { bool cache = true }) async {
     final ByteData data = await load(key);
     // Note: data has a non-nullable type, but might be null when running with
     // weak checking, so we need to null check it anyway (and ignore the warning
@@ -82,26 +73,15 @@ abstract class AssetBundle {
       throw FlutterError('Unable to load asset: $key'); // ignore: dead_code
     // 50 KB of data should take 2-3 ms to parse on a Moto G4, and about 400 μs
     // on a Pixel 4.
-    if (data.lengthInBytes < 50 * 1024 && !unzip) {
-      return _utf8Decode(data);
+    if (data.lengthInBytes < 50 * 1024) {
+      return utf8.decode(data.buffer.asUint8List());
     }
-
     // For strings larger than 50 KB, run the computation in an isolate to
     // avoid causing main thread jank.
-    return compute(
-      unzip ? _utf8ZipDecode : _utf8Decode,
-      data,
-      debugLabel: '${unzip ? "Unzip and ": ""}UTF8 decode for "$key"',
-    );
-  }
-
-  static String _utf8ZipDecode(ByteData data) {
-    List<int> bytes = data.buffer.asUint8List();
-    bytes = gzip.decode(bytes);
-    return utf8.decode(bytes);
+    return compute(_utf8decode, data, debugLabel: 'UTF8 decode for "$key"');
   }
 
-  static String _utf8Decode(ByteData data) {
+  static String _utf8decode(ByteData data) {
     return utf8.decode(data.buffer.asUint8List());
   }
 
@@ -183,10 +163,10 @@ abstract class CachingAssetBundle extends AssetBundle {
   final Map<String, Future<dynamic>> _structuredDataCache = <String, Future<dynamic>>{};
 
   @override
-  Future<String> loadString(String key, { bool cache = true, bool unzip = false }) {
+  Future<String> loadString(String key, { bool cache = true }) {
     if (cache)
-      return _stringCache.putIfAbsent(key, () => super.loadString(key, unzip: unzip));
-    return super.loadString(key, unzip: unzip);
+      return _stringCache.putIfAbsent(key, () => super.loadString(key));
+    return super.loadString(key);
   }
 
   /// Retrieve a string from the asset bundle, parse it with the given function,

packages/flutter/lib/src/services/binding.dart

@@ -104,19 +104,7 @@ mixin ServicesBinding on BindingBase, SchedulerBinding {
     // TODO(ianh): Remove this complexity once these bugs are fixed.
     final Completer<String> rawLicenses = Completer<String>();
     scheduleTask(() async {
-      rawLicenses.complete(
-        await rootBundle.loadString(
-          // NOTICES for web isn't compressed since we don't have access to
-          // dart:io on the client side and it's already compressed between
-          // the server and client.
-          //
-          // The compressed version doesn't have a more common .gz extension
-          // because gradle for Android non-transparently manipulates .gz files.
-          kIsWeb ? 'NOTICES' : 'NOTICES.Z',
-          cache: false,
-          unzip: !kIsWeb,
-        )
-      );
+      rawLicenses.complete(await rootBundle.loadString('NOTICES', cache: false));
     }, Priority.animation);
     await rawLicenses.future;
     final Completer<List<LicenseEntry>> parsedLicenses = Completer<List<LicenseEntry>>();

packages/flutter/test/services/asset_bundle_test.dart

@@ -3,7 +3,6 @@
 // found in the LICENSE file.
 
 import 'dart:convert';
-import 'dart:io';
 import 'dart:typed_data';
 
 import 'package:flutter/foundation.dart';
@@ -16,13 +15,10 @@ class TestAssetBundle extends CachingAssetBundle {
 
   @override
   Future<ByteData> load(String key) async {
-    loadCallCount[key] = loadCallCount[key] ?? 0 + 1;
     if (key == 'AssetManifest.json')
       return ByteData.view(Uint8List.fromList(const Utf8Encoder().convert('{"one": ["one"]}')).buffer);
 
-    if (key == 'NOTICES.Z')
-      return ByteData.view(Uint8List.fromList(gzip.encode(utf8.encode('All your base are belong to us'))).buffer);
-
+    loadCallCount[key] = loadCallCount[key] ?? 0 + 1;
     if (key == 'one')
       return ByteData(1)..setInt8(0, 49);
     throw FlutterError('key not found');
@@ -52,26 +48,6 @@ void main() {
     expect(loadException, isFlutterError);
   });
 
-  test('Test loading zipped strings', () async {
-    final TestAssetBundle bundle = TestAssetBundle();
-
-    String assetString = await bundle.loadString('NOTICES.Z', unzip: true);
-    expect(assetString, equals('All your base are belong to us'));
-
-    expect(bundle.loadCallCount['NOTICES.Z'], 1);
-
-    assetString = await bundle.loadString('NOTICES.Z', unzip: true);
-    expect(assetString, equals('All your base are belong to us'));
-
-    // Should have been cached and shouldn't retrieve and decode another time.
-    expect(bundle.loadCallCount['NOTICES.Z'], 1);
-  }, onPlatform: <String, dynamic>{
-    'browser': const Skip(
-      'Skip the NOTICES unzipping test because NOTICES are'
-      'not zipped for the web'
-    ),
-  });
-
   test('AssetImage.obtainKey succeeds with ImageConfiguration.empty', () async {
     // This is a regression test for https://github.com/flutter/flutter/issues/12392
     final AssetImage assetImage = AssetImage('one', bundle: TestAssetBundle());

packages/flutter/test/services/binding_test.dart

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'dart:convert';
-import 'dart:io';
 import 'dart:typed_data';
 
 import 'package:flutter/foundation.dart';
@@ -46,10 +44,7 @@ class TestBinding extends BindingBase with SchedulerBinding, ServicesBinding {
   BinaryMessenger createBinaryMessenger() {
     return super.createBinaryMessenger()
       ..setMockMessageHandler('flutter/assets', (ByteData? message) async {
-        if (const StringCodec().decodeMessage(message) == 'NOTICES.Z' && !kIsWeb) {
-          return Uint8List.fromList(gzip.encode(utf8.encode(licenses))).buffer.asByteData();
-        }
-        if (const StringCodec().decodeMessage(message) == 'NOTICES' && kIsWeb) {
+        if (const StringCodec().decodeMessage(message) == 'NOTICES') {
           return const StringCodec().encodeMessage(licenses);
         }
         return null;

packages/flutter/test/widgets/image_resolution_test.dart

@@ -66,7 +66,7 @@ class TestAssetBundle extends CachingAssetBundle {
   }
 
   @override
-  Future<String> loadString(String key, { bool cache = true, bool unzip = false }) {
+  Future<String> loadString(String key, { bool cache = true }) {
     if (key == 'AssetManifest.json')
       return SynchronousFuture<String>(manifest);
     return SynchronousFuture<String>('');

packages/flutter_tools/bin/fuchsia_asset_builder.dart

@@ -7,7 +7,6 @@ import 'package:flutter_tools/src/asset.dart' hide defaultManifestPath;
 import 'package:flutter_tools/src/base/context.dart';
 import 'package:flutter_tools/src/base/file_system.dart' as libfs;
 import 'package:flutter_tools/src/base/io.dart';
-import 'package:flutter_tools/src/build_info.dart';
 import 'package:flutter_tools/src/cache.dart';
 import 'package:flutter_tools/src/context_runner.dart';
 import 'package:flutter_tools/src/devfs.dart';
@@ -60,7 +59,6 @@ Future<void> run(List<String> args) async {
     manifestPath: argResults[_kOptionManifest] as String ?? defaultManifestPath,
     assetDirPath: assetDir,
     packagesPath: argResults[_kOptionPackages] as String,
-    targetPlatform: TargetPlatform.fuchsia_arm64 // This is not arch specific.
   );
 
   if (assets == null) {

packages/flutter_tools/lib/src/asset.dart

@@ -7,7 +7,6 @@ import 'package:package_config/package_config.dart';
 
 import 'base/context.dart';
 import 'base/file_system.dart';
-import 'base/io.dart';
 import 'base/logger.dart';
 import 'base/platform.dart';
 import 'build_info.dart';
@@ -73,7 +72,6 @@ abstract class AssetBundle {
     String manifestPath = defaultManifestPath,
     String assetDirPath,
     @required String packagesPath,
-    TargetPlatform targetPlatform,
   });
 }
 
@@ -124,13 +122,6 @@ class ManifestAssetBundle implements AssetBundle {
 
   static const String _kAssetManifestJson = 'AssetManifest.json';
   static const String _kNoticeFile = 'NOTICES';
-  // Comically, this can't be name with the more common .gz file extension
-  // because when it's part of an AAR and brought into another APK via gradle,
-  // gradle individually traverses all the files of the AAR and unzips .gz
-  // files (b/37117906). A less common .Z extension still describes how the
-  // file is formatted if users want to manually inspect the application
-  // bundle and is recognized by default file handlers on OS such as macOS.˚
-  static const String _kNoticeZippedFile = 'NOTICES.Z';
 
   @override
   bool wasBuiltOnce() => _lastBuildTimestamp != null;
@@ -169,7 +160,6 @@ class ManifestAssetBundle implements AssetBundle {
     String manifestPath = defaultManifestPath,
     String assetDirPath,
     @required String packagesPath,
-    TargetPlatform targetPlatform,
   }) async {
     assetDirPath ??= getAssetBuildDirectory();
     FlutterProject flutterProject;
@@ -330,6 +320,7 @@ class ManifestAssetBundle implements AssetBundle {
     final DevFSStringContent assetManifest  = _createAssetManifest(assetVariants);
     final DevFSStringContent fontManifest = DevFSStringContent(json.encode(fonts));
     final LicenseResult licenseResult = _licenseCollector.obtainLicenses(packageConfig);
+    final DevFSStringContent licenses = DevFSStringContent(licenseResult.combinedLicenses);
     additionalDependencies = licenseResult.dependencies;
 
     if (wildcardDirectories.isNotEmpty) {
@@ -347,27 +338,7 @@ class ManifestAssetBundle implements AssetBundle {
 
     _setIfChanged(_kAssetManifestJson, assetManifest);
     _setIfChanged(kFontManifestJson, fontManifest);
-    if (targetPlatform == TargetPlatform.web_javascript) {
-      // Don't compress the NOTICES file on web since the client doesn't have
-      // dart:io to decompress it.
-      _setIfChanged(_kNoticeFile, DevFSStringContent(licenseResult.combinedLicenses));
-    } else {
-      final List<int> licenseBytes = utf8.encode(licenseResult.combinedLicenses);
-      if (entries[_kNoticeZippedFile] == null ||
-          gzip.decode((entries[_kNoticeZippedFile] as DevFSByteContent).bytes)
-              != licenseBytes) {
-        entries[_kNoticeZippedFile] = DevFSByteContent(
-          ZLibEncoder(
-            // A zlib dictionary is a hinting string sequence with the most
-            // likely string occurrences at the end. This ends up just being
-            // common English words with domain specific words like copyright.
-            dictionary: utf8.encode('copyrightsoftwaretothisinandorofthe'),
-            gzip: true,
-            level: 9,
-          ).convert(licenseBytes)
-        );
-      }
-    }
+    _setIfChanged(_kNoticeFile, licenses);
     return 0;
   }
 

packages/flutter_tools/lib/src/base/io.dart

@@ -102,8 +102,7 @@ export 'dart:io'
         systemEncoding,
         WebSocket,
         WebSocketException,
-        WebSocketTransformer,
-        ZLibEncoder;
+        WebSocketTransformer;
 
 /// Exits the process with the given [exitCode].
 typedef ExitFunction = void Function(int exitCode);

packages/flutter_tools/lib/src/build_system/targets/assets.dart

@@ -54,7 +54,6 @@ Future<Depfile> copyAssets(Environment environment, Directory outputDirectory, {
     manifestPath: pubspecFile.path,
     packagesPath: environment.projectDir.childFile('.packages').path,
     assetDirPath: null,
-    targetPlatform: targetPlatform,
   );
   if (resultCode != 0) {
     throw Exception('Failed to bundle asset files.');