[flutter_tools] default tree-shake-icons to enabled and improve performance (#54923)

dev/benchmarks/macrobenchmarks/pubspec.yaml

@@ -16,6 +16,7 @@ dependencies:
   # and run
   #   flutter update-packages --force-upgrade
   flutter_gallery_assets: 0.1.9+2
+  cupertino_icons: 0.1.3
 
   archive: 2.0.13 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   args: 1.6.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -91,4 +92,4 @@ flutter:
   - packages/flutter_gallery_assets/food/cherry_pie.png
   - assets/999x1000.png
 
-# PUBSPEC CHECKSUM: 3a55
+# PUBSPEC CHECKSUM: 49fa

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

@@ -60,9 +60,9 @@ Future<Depfile> copyAssets(Environment environment, Directory outputDirectory) a
         file.parent.createSync(recursive: true);
         final DevFSContent content = entry.value;
         if (content is DevFSFileContent && content.file is File) {
-          inputs.add(globals.fs.file(content.file.path));
+          inputs.add(content.file as File);
           if (!await iconTreeShaker.subsetFont(
-            inputPath: content.file.path,
+            input: content.file as File,
             outputPath: file.path,
             relativePath: entry.key,
           )) {

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

@@ -4,6 +4,7 @@
 
 import 'package:meta/meta.dart';
 import 'package:process/process.dart';
+import 'package:mime/mime.dart' as mime;
 
 import '../../artifacts.dart';
 import '../../base/common.dart';
@@ -20,7 +21,7 @@ import 'dart.dart';
 const String kIconTreeShakerFlag = 'TreeShakeIcons';
 
 /// Whether icon font subsetting is enabled by default.
-const bool kIconTreeShakerEnabledDefault = false;
+const bool kIconTreeShakerEnabledDefault = true;
 
 List<Map<String, dynamic>> _getList(dynamic object, String errorMessage) {
   try {
@@ -66,6 +67,12 @@ class IconTreeShaker {
     }
   }
 
+  /// The MIME type for ttf fonts.
+  static const Set<String> kTtfMimeTypes = <String>{
+    'font/ttf', // based on internet search
+    'application/x-font-ttf', // based on running locally.
+  };
+
   /// The [Source] inputs that targets using this should depend on.
   ///
   /// See [Target.inputs].
@@ -77,6 +84,7 @@ class IconTreeShaker {
 
   final Environment _environment;
   final String _fontManifest;
+  Future<void> _iconDataProcessing;
   Map<String, _IconTreeShakerData> _iconData;
 
   final ProcessManager _processManager;
@@ -89,10 +97,10 @@ class IconTreeShaker {
                    && _environment.defines[kIconTreeShakerFlag] == 'true'
                    && _environment.defines[kBuildMode] != 'debug';
 
-  /// Fills the [_iconData] map.
+  // Fills the [_iconData] map.
-  Future<Map<String, _IconTreeShakerData>> _getIconData(Environment environment) async {
+  Future<void> _getIconData(Environment environment) async {
     if (!enabled) {
-      return null;
+      return;
     }
 
     final File appDill = environment.buildDir.childFile('app.dill');
@@ -135,13 +143,11 @@ class IconTreeShaker {
         codePoints: iconData[entry.key],
       );
     }
-    return result;
+    _iconData = result;
   }
 
-  /// Calls font-subset, which transforms the `inputPath` font file to a
+  /// Calls font-subset, which transforms the [input] font file to a
-  /// subsetted version at `outputPath`.
+  /// subsetted version at [outputPath].
-  ///
-  /// The `relativePath` parameter
   ///
   /// All parameters are required.
   ///
@@ -150,15 +156,24 @@ class IconTreeShaker {
   /// If the font-subset subprocess fails, it will [throwToolExit].
   /// Otherwise, it will return true.
   Future<bool> subsetFont({
-    @required String inputPath,
+    @required File input,
     @required String outputPath,
     @required String relativePath,
   }) async {
     if (!enabled) {
       return false;
     }
-
+    if (input.lengthSync() < 12) {
-    _iconData ??= await _getIconData(_environment);
+      return false;
+    }
+    final String mimeType = mime.lookupMimeType(
+      input.path,
+      headerBytes: await input.openRead(0, 12).first,
+    );
+    if (!kTtfMimeTypes.contains(mimeType)) {
+      return false;
+    }
+    await (_iconDataProcessing ??= _getIconData(_environment));
     assert(_iconData != null);
 
     final _IconTreeShakerData iconTreeShakerData = _iconData[relativePath];
@@ -176,7 +191,7 @@ class IconTreeShaker {
     final List<String> cmd = <String>[
       fontSubset.path,
       outputPath,
-      inputPath,
+      input.path,
     ];
     final String codePoints = iconTreeShakerData.codePoints.join(' ');
     _logger.printTrace('Running font-subset: ${cmd.join(' ')}, '
@@ -186,9 +201,7 @@ class IconTreeShaker {
       fontSubsetProcess.stdin.writeln(codePoints);
       await fontSubsetProcess.stdin.flush();
       await fontSubsetProcess.stdin.close();
-    } on Exception catch (_) {
+    } on Exception {
-      // handled by checking the exit code.
-    } on OSError catch (_) {  // ignore: dead_code_on_catch_subtype
       // handled by checking the exit code.
     }
 

packages/flutter_tools/test/commands.shard/permeable/build_bundle_test.dart

@@ -219,7 +219,7 @@ void main() {
         kBuildMode: 'debug',
         kTargetPlatform: 'android-arm',
         kTrackWidgetCreation: 'true',
-        kIconTreeShakerFlag: null,
+        kIconTreeShakerFlag: 'true',
       });
 
       return BuildResult(success: true);

packages/flutter_tools/test/general.shard/build_system/targets/icon_tree_shaker_test.dart

@@ -23,38 +23,39 @@ import '../../../src/common.dart';
 import '../../../src/context.dart';
 import '../../../src/mocks.dart' as mocks;
 
-final Platform _kNoAnsiPlatform = FakePlatform(stdoutSupportsAnsi: false);
+final Platform kNoAnsiPlatform = FakePlatform(stdoutSupportsAnsi: false);
+const List<int> _kTtfHeaderBytes = <int>[0, 1, 0, 0, 0, 15, 0, 128, 0, 3, 0, 112];
+
+const String dartPath = '/flutter/dart';
+const String constFinderPath = '/flutter/const_finder.snapshot.dart';
+const String fontSubsetPath = '/flutter/font-subset';
+
+const String inputPath = '/input/fonts/MaterialIcons-Regular.ttf';
+const String outputPath = '/output/fonts/MaterialIcons-Regular.ttf';
+const String relativePath = 'fonts/MaterialIcons-Regular.ttf';
+
+List<String> getConstFinderArgs(String appDillPath) => <String>[
+  dartPath,
+  constFinderPath,
+  '--kernel-file', appDillPath,
+  '--class-library-uri', 'package:flutter/src/widgets/icon_data.dart',
+  '--class-name', 'IconData',
+];
+
+const List<String> fontSubsetArgs = <String>[
+  fontSubsetPath,
+  outputPath,
+  inputPath,
+];
 
 void main() {
   BufferLogger logger;
-  MemoryFileSystem fs;
+  MemoryFileSystem fileSystem;
   MockProcessManager mockProcessManager;
   MockProcess fontSubsetProcess;
   MockArtifacts mockArtifacts;
   DevFSStringContent fontManifestContent;
 
-  const String dartPath = '/flutter/dart';
-  const String constFinderPath = '/flutter/const_finder.snapshot.dart';
-  const String fontSubsetPath = '/flutter/font-subset';
-
-  const String inputPath = '/input/fonts/MaterialIcons-Regular.ttf';
-  const String outputPath = '/output/fonts/MaterialIcons-Regular.ttf';
-  const String relativePath = 'fonts/MaterialIcons-Regular.ttf';
-
-  List<String> getConstFinderArgs(String appDillPath) => <String>[
-    dartPath,
-    constFinderPath,
-    '--kernel-file', appDillPath,
-    '--class-library-uri', 'package:flutter/src/widgets/icon_data.dart',
-    '--class-name', 'IconData',
-  ];
-
-  const List<String> fontSubsetArgs = <String>[
-    fontSubsetPath,
-    outputPath,
-    inputPath,
-  ];
-
   void _addConstFinderInvocation(
     String appDillPath, {
     int exitCode = 0,
@@ -89,19 +90,21 @@ void main() {
     mockProcessManager = MockProcessManager();
     fontSubsetProcess = MockProcess();
     mockArtifacts = MockArtifacts();
-
+    fileSystem = MemoryFileSystem();
-    fs = MemoryFileSystem();
     logger = BufferLogger(
       terminal: AnsiTerminal(
         stdio: mocks.MockStdio(),
-        platform: _kNoAnsiPlatform,
+        platform: kNoAnsiPlatform,
       ),
       outputPreferences: OutputPreferences.test(showColor: false),
     );
 
-    fs.file(constFinderPath).createSync(recursive: true);
+    fileSystem.file(constFinderPath).createSync(recursive: true);
-    fs.file(dartPath).createSync(recursive: true);
+    fileSystem.file(dartPath).createSync(recursive: true);
-    fs.file(fontSubsetPath).createSync(recursive: true);
+    fileSystem.file(fontSubsetPath).createSync(recursive: true);
+    fileSystem.file(inputPath)
+      ..createSync(recursive: true)
+      ..writeAsBytesSync(_kTtfHeaderBytes);
     when(mockArtifacts.getArtifactPath(Artifact.constFinder)).thenReturn(constFinderPath);
     when(mockArtifacts.getArtifactPath(Artifact.fontSubset)).thenReturn(fontSubsetPath);
     when(mockArtifacts.getArtifactPath(Artifact.engineDartBinary)).thenReturn(dartPath);
@@ -109,11 +112,11 @@ void main() {
 
   Environment _createEnvironment(Map<String, String> defines) {
     return Environment.test(
-      fs.directory('/icon_test')..createSync(recursive: true),
+      fileSystem.directory('/icon_test')..createSync(recursive: true),
       defines: defines,
       artifacts: mockArtifacts,
       processManager: FakeProcessManager.any(),
-      fileSystem: fs,
+      fileSystem: fileSystem,
       logger: BufferLogger.test(),
     );
   }
@@ -129,18 +132,19 @@ void main() {
       fontManifestContent,
       logger: logger,
       processManager: mockProcessManager,
-      fileSystem: fs,
+      fileSystem: fileSystem,
       artifacts: mockArtifacts,
     );
 
     expect(
       logger.errorText,
-      'Font subetting is not supported in debug mode. The --tree-shake-icons flag will be ignored.\n',
+      'Font subetting is not supported in debug mode. The --tree-shake-icons'
+      ' flag will be ignored.\n',
     );
     expect(iconTreeShaker.enabled, false);
 
     final bool subsets = await iconTreeShaker.subsetFont(
-      inputPath: inputPath,
+      input: fileSystem.file(inputPath),
       outputPath: outputPath,
       relativePath: relativePath,
     );
@@ -161,7 +165,7 @@ void main() {
       null,
       logger: logger,
       processManager: mockProcessManager,
-      fileSystem: fs,
+      fileSystem: fileSystem,
       artifacts: mockArtifacts,
     );
 
@@ -185,7 +189,7 @@ void main() {
       fontManifestContent,
       logger: logger,
       processManager: mockProcessManager,
-      fileSystem: fs,
+      fileSystem: fileSystem,
       artifacts: mockArtifacts,
     );
 
@@ -209,13 +213,13 @@ void main() {
       fontManifestContent,
       logger: logger,
       processManager: mockProcessManager,
-      fileSystem: fs,
+      fileSystem: fileSystem,
       artifacts: mockArtifacts,
     );
 
     expect(
-      () => iconTreeShaker.subsetFont(
+      () async => await iconTreeShaker.subsetFont(
-        inputPath: inputPath,
+        input: fileSystem.file(inputPath),
         outputPath: outputPath,
         relativePath: relativePath,
       ),
@@ -223,20 +227,20 @@ void main() {
     );
   });
 
-  testWithoutContext('The happy path', () async {
+  testWithoutContext('Can subset a font', () async {
     final Environment environment = _createEnvironment(<String, String>{
       kIconTreeShakerFlag: 'true',
       kBuildMode: 'release',
     });
-    final File appDill = environment.buildDir.childFile('app.dill')..createSync(recursive: true);
+    final File appDill = environment.buildDir.childFile('app.dill')
-    fs.file(inputPath).createSync(recursive: true);
+      ..createSync(recursive: true);
 
     final IconTreeShaker iconTreeShaker = IconTreeShaker(
       environment,
       fontManifestContent,
       logger: logger,
       processManager: mockProcessManager,
-      fileSystem: fs,
+      fileSystem: fileSystem,
       artifacts: mockArtifacts,
     );
 
@@ -245,7 +249,7 @@ void main() {
     _resetFontSubsetInvocation(stdinSink: stdinSink);
 
     bool subsetted = await iconTreeShaker.subsetFont(
-      inputPath: inputPath,
+      input: fileSystem.file(inputPath),
       outputPath: outputPath,
       relativePath: relativePath,
     );
@@ -254,7 +258,7 @@ void main() {
 
     expect(subsetted, true);
     subsetted = await iconTreeShaker.subsetFont(
-      inputPath: inputPath,
+      input: fileSystem.file(inputPath),
       outputPath: outputPath,
       relativePath: relativePath,
     );
@@ -265,33 +269,104 @@ void main() {
     verify(mockProcessManager.start(fontSubsetArgs)).called(2);
   });
 
-  testWithoutContext('Non-constant instances', () async {
+  testWithoutContext('Does not subset a non-ttf font', () async {
     final Environment environment = _createEnvironment(<String, String>{
       kIconTreeShakerFlag: 'true',
       kBuildMode: 'release',
     });
-    final File appDill = environment.buildDir.childFile('app.dill')..createSync(recursive: true);
+    final File appDill = environment.buildDir.childFile('app.dill')
-    fs.file(inputPath).createSync(recursive: true);
+      ..createSync(recursive: true);
 
     final IconTreeShaker iconTreeShaker = IconTreeShaker(
       environment,
       fontManifestContent,
       logger: logger,
       processManager: mockProcessManager,
-      fileSystem: fs,
+      fileSystem: fileSystem,
+      artifacts: mockArtifacts,
+    );
+
+    final mocks.CompleterIOSink stdinSink = mocks.CompleterIOSink();
+    _addConstFinderInvocation(appDill.path, stdout: validConstFinderResult);
+    _resetFontSubsetInvocation(stdinSink: stdinSink);
+
+    final File notAFont = fileSystem.file('input/foo/bar.txt')
+      ..createSync(recursive: true)
+      ..writeAsStringSync('I could not think of a better string');
+    final bool subsetted = await iconTreeShaker.subsetFont(
+      input: notAFont,
+      outputPath: outputPath,
+      relativePath: relativePath,
+    );
+    expect(subsetted, false);
+
+    verifyNever(mockProcessManager.run(getConstFinderArgs(appDill.path)));
+    verifyNever(mockProcessManager.start(fontSubsetArgs));
+  });
+
+  testWithoutContext('Does not subset an invalid ttf font', () async {
+    final Environment environment = _createEnvironment(<String, String>{
+      kIconTreeShakerFlag: 'true',
+      kBuildMode: 'release',
+    });
+    final File appDill = environment.buildDir.childFile('app.dill')
+      ..createSync(recursive: true);
+
+    final IconTreeShaker iconTreeShaker = IconTreeShaker(
+      environment,
+      fontManifestContent,
+      logger: logger,
+      processManager: mockProcessManager,
+      fileSystem: fileSystem,
+      artifacts: mockArtifacts,
+    );
+
+    final mocks.CompleterIOSink stdinSink = mocks.CompleterIOSink();
+    _addConstFinderInvocation(appDill.path, stdout: validConstFinderResult);
+    _resetFontSubsetInvocation(stdinSink: stdinSink);
+
+    final File notAFont = fileSystem.file(inputPath)
+      ..writeAsBytesSync(<int>[0, 1, 2]);
+    final bool subsetted = await iconTreeShaker.subsetFont(
+      input: notAFont,
+      outputPath: outputPath,
+      relativePath: relativePath,
+    );
+
+    expect(subsetted, false);
+    verifyNever(mockProcessManager.run(getConstFinderArgs(appDill.path)));
+    verifyNever(mockProcessManager.start(fontSubsetArgs));
+  });
+
+  testWithoutContext('Non-constant instances', () async {
+    final Environment environment = _createEnvironment(<String, String>{
+      kIconTreeShakerFlag: 'true',
+      kBuildMode: 'release',
+    });
+    final File appDill = environment.buildDir.childFile('app.dill')
+      ..createSync(recursive: true);
+
+    final IconTreeShaker iconTreeShaker = IconTreeShaker(
+      environment,
+      fontManifestContent,
+      logger: logger,
+      processManager: mockProcessManager,
+      fileSystem: fileSystem,
       artifacts: mockArtifacts,
     );
 
     _addConstFinderInvocation(appDill.path, stdout: constFinderResultWithInvalid);
 
-    expect(
+    await expectLater(
-      iconTreeShaker.subsetFont(
+      () async => await iconTreeShaker.subsetFont(
-        inputPath: inputPath,
+        input: fileSystem.file(inputPath),
         outputPath: outputPath,
         relativePath: relativePath,
       ),
       throwsToolExit(
-        message: 'Avoid non-constant invocations of IconData or try to build again with --no-tree-shake-icons.',
+        message:
+          'Avoid non-constant invocations of IconData or try to build'
+          ' again with --no-tree-shake-icons.',
       ),
     );
 
@@ -304,15 +379,16 @@ void main() {
       kIconTreeShakerFlag: 'true',
       kBuildMode: 'release',
     });
-    final File appDill = environment.buildDir.childFile('app.dill')..createSync(recursive: true);
+    final File appDill = environment.buildDir.childFile('app.dill')
-    fs.file(inputPath).createSync(recursive: true);
+      ..createSync(recursive: true);
+    fileSystem.file(inputPath).createSync(recursive: true);
 
     final IconTreeShaker iconTreeShaker = IconTreeShaker(
       environment,
       fontManifestContent,
       logger: logger,
       processManager: mockProcessManager,
-      fileSystem: fs,
+      fileSystem: fileSystem,
       artifacts: mockArtifacts,
     );
 
@@ -320,9 +396,9 @@ void main() {
     _addConstFinderInvocation(appDill.path, stdout: validConstFinderResult);
     _resetFontSubsetInvocation(exitCode: -1, stdinSink: stdinSink);
 
-    expect(
+    await expectLater(
-      iconTreeShaker.subsetFont(
+      () async => await iconTreeShaker.subsetFont(
-        inputPath: inputPath,
+        input: fileSystem.file(inputPath),
         outputPath: outputPath,
         relativePath: relativePath,
       ),
@@ -330,7 +406,7 @@ void main() {
     );
 
     verify(mockProcessManager.run(getConstFinderArgs(appDill.path))).called(1);
-    verifyNever(mockProcessManager.start(fontSubsetArgs));
+    verify(mockProcessManager.start(fontSubsetArgs)).called(1);
   });
 
   testWithoutContext('font-subset throws on write to sdtin', () async {
@@ -338,15 +414,15 @@ void main() {
       kIconTreeShakerFlag: 'true',
       kBuildMode: 'release',
     });
-    final File appDill = environment.buildDir.childFile('app.dill')..createSync(recursive: true);
+    final File appDill = environment.buildDir.childFile('app.dill')
-    fs.file(inputPath).createSync(recursive: true);
+      ..createSync(recursive: true);
 
     final IconTreeShaker iconTreeShaker = IconTreeShaker(
       environment,
       fontManifestContent,
       logger: logger,
       processManager: mockProcessManager,
-      fileSystem: fs,
+      fileSystem: fileSystem,
       artifacts: mockArtifacts,
     );
 
@@ -354,9 +430,9 @@ void main() {
     _addConstFinderInvocation(appDill.path, stdout: validConstFinderResult);
     _resetFontSubsetInvocation(exitCode: -1, stdinSink: stdinSink);
 
-    expect(
+    await expectLater(
-      iconTreeShaker.subsetFont(
+      () async => await iconTreeShaker.subsetFont(
-        inputPath: inputPath,
+        input: fileSystem.file(inputPath),
         outputPath: outputPath,
         relativePath: relativePath,
       ),
@@ -364,7 +440,7 @@ void main() {
     );
 
     verify(mockProcessManager.run(getConstFinderArgs(appDill.path))).called(1);
-    verifyNever(mockProcessManager.start(fontSubsetArgs));
+    verify(mockProcessManager.start(fontSubsetArgs)).called(1);
   });
 
   testWithoutContext('Invalid font manifest', () async {
@@ -372,8 +448,8 @@ void main() {
       kIconTreeShakerFlag: 'true',
       kBuildMode: 'release',
     });
-    final File appDill = environment.buildDir.childFile('app.dill')..createSync(recursive: true);
+    final File appDill = environment.buildDir.childFile('app.dill')
-    fs.file(inputPath).createSync(recursive: true);
+      ..createSync(recursive: true);
 
     fontManifestContent = DevFSStringContent(invalidFontManifestJson);
 
@@ -382,15 +458,15 @@ void main() {
       fontManifestContent,
       logger: logger,
       processManager: mockProcessManager,
-      fileSystem: fs,
+      fileSystem: fileSystem,
       artifacts: mockArtifacts,
     );
 
     _addConstFinderInvocation(appDill.path, stdout: validConstFinderResult);
 
-    expect(
+    await expectLater(
-      iconTreeShaker.subsetFont(
+      () async => await iconTreeShaker.subsetFont(
-        inputPath: inputPath,
+        input: fileSystem.file(inputPath),
         outputPath: outputPath,
         relativePath: relativePath,
       ),
@@ -406,8 +482,8 @@ void main() {
       kIconTreeShakerFlag: 'true',
       kBuildMode: 'release',
     });
-    final File appDill = environment.buildDir.childFile('app.dill')..createSync(recursive: true);
+    final File appDill = environment.buildDir.childFile('app.dill')
-    fs.file(inputPath).createSync(recursive: true);
+      ..createSync(recursive: true);
 
     fontManifestContent = DevFSStringContent(invalidFontManifestJson);
 
@@ -416,15 +492,15 @@ void main() {
       fontManifestContent,
       logger: logger,
       processManager: mockProcessManager,
-      fileSystem: fs,
+      fileSystem: fileSystem,
       artifacts: mockArtifacts,
     );
 
     _addConstFinderInvocation(appDill.path, exitCode: -1);
 
-    expect(
+    await expectLater(
-      iconTreeShaker.subsetFont(
+      () async => await iconTreeShaker.subsetFont(
-        inputPath: inputPath,
+        input: fileSystem.file(inputPath),
         outputPath: outputPath,
         relativePath: relativePath,
       ),

packages/flutter_tools/test/general.shard/commands/build_aot_test.dart

@@ -110,7 +110,7 @@ void main() {
 
   testUsingContext('build aot outputs timing info', () async {
     globals.fs
-      .file('.dart_tool/flutter_build/0c21fd4ab3b8bde8b385ff01d08e0093/app.so')
+      .file('.dart_tool/flutter_build/3f206b606f73e08587a94405f2e86fad/app.so')
       .createSync(recursive: true);
     when(globals.buildSystem.build(any, any))
       .thenAnswer((Invocation invocation) async {

packages/flutter_tools/test/general.shard/commands/build_apk_test.dart

@@ -238,6 +238,7 @@ void main() {
           '-Ptarget=${globals.fs.path.join(tempDir.path, 'flutter_project', 'lib', 'main.dart')}',
           '-Ptrack-widget-creation=true',
           '-Pshrink=true',
+          '-Ptree-shake-icons=true',
           'assembleRelease',
         ],
         workingDirectory: anyNamed('workingDirectory'),
@@ -267,6 +268,7 @@ void main() {
           '-Ptrack-widget-creation=true',
           '-Pshrink=true',
           '-Psplit-debug-info=${tempDir.path}',
+          '-Ptree-shake-icons=true',
           'assembleRelease',
         ],
         workingDirectory: anyNamed('workingDirectory'),
@@ -299,6 +301,7 @@ void main() {
           '-Ptrack-widget-creation=true',
           '-Pextra-front-end-options=foo,bar',
           '-Pshrink=true',
+          '-Ptree-shake-icons=true',
           'assembleRelease',
         ],
         workingDirectory: anyNamed('workingDirectory'),
@@ -329,6 +332,7 @@ void main() {
           '-Ptarget-platform=android-arm,android-arm64,android-x64',
           '-Ptarget=${globals.fs.path.join(tempDir.path, 'flutter_project', 'lib', 'main.dart')}',
           '-Ptrack-widget-creation=true',
+          '-Ptree-shake-icons=true',
           'assembleRelease',
         ],
         workingDirectory: anyNamed('workingDirectory'),
@@ -353,6 +357,7 @@ void main() {
           '-Ptarget=${globals.fs.path.join(tempDir.path, 'flutter_project', 'lib', 'main.dart')}',
           '-Ptrack-widget-creation=true',
           '-Pshrink=true',
+          '-Ptree-shake-icons=true',
           'assembleRelease',
         ],
         workingDirectory: anyNamed('workingDirectory'),
@@ -414,6 +419,7 @@ void main() {
           '-Ptarget=${globals.fs.path.join(tempDir.path, 'flutter_project', 'lib', 'main.dart')}',
           '-Ptrack-widget-creation=true',
           '-Pshrink=true',
+          '-Ptree-shake-icons=true',
           'assembleRelease',
         ],
         workingDirectory: anyNamed('workingDirectory'),
@@ -465,6 +471,7 @@ void main() {
           '-Ptarget=${globals.fs.path.join(tempDir.path, 'flutter_project', 'lib', 'main.dart')}',
           '-Ptrack-widget-creation=true',
           '-Pshrink=true',
+          '-Ptree-shake-icons=true',
           'assembleRelease',
         ],
         workingDirectory: anyNamed('workingDirectory'),

packages/flutter_tools/test/general.shard/commands/build_appbundle_test.dart

@@ -225,6 +225,7 @@ void main() {
           '-Ptarget=${globals.fs.path.join(tempDir.path, 'flutter_project', 'lib', 'main.dart')}',
           '-Ptrack-widget-creation=false',
           '-Pshrink=true',
+          '-Ptree-shake-icons=true',
           'bundleRelease',
         ],
         workingDirectory: anyNamed('workingDirectory'),
@@ -257,6 +258,7 @@ void main() {
           '-Ptarget-platform=android-arm,android-arm64,android-x64',
           '-Ptarget=${globals.fs.path.join(tempDir.path, 'flutter_project', 'lib', 'main.dart')}',
           '-Ptrack-widget-creation=false',
+          '-Ptree-shake-icons=true',
           'bundleRelease',
         ],
         workingDirectory: anyNamed('workingDirectory'),
@@ -281,6 +283,7 @@ void main() {
           '-Ptarget=${globals.fs.path.join(tempDir.path, 'flutter_project', 'lib', 'main.dart')}',
           '-Ptrack-widget-creation=false',
           '-Pshrink=true',
+          '-Ptree-shake-icons=true',
           'bundleRelease',
         ],
         workingDirectory: anyNamed('workingDirectory'),
@@ -342,6 +345,7 @@ void main() {
           '-Ptarget=${globals.fs.path.join(tempDir.path, 'flutter_project', 'lib', 'main.dart')}',
           '-Ptrack-widget-creation=false',
           '-Pshrink=true',
+          '-Ptree-shake-icons=true',
           'assembleRelease',
         ],
         workingDirectory: anyNamed('workingDirectory'),
@@ -393,6 +397,7 @@ void main() {
           '-Ptarget=${globals.fs.path.join(tempDir.path, 'flutter_project', 'lib', 'main.dart')}',
           '-Ptrack-widget-creation=false',
           '-Pshrink=true',
+          '-Ptree-shake-icons=true',
           'assembleRelease',
         ],
         workingDirectory: anyNamed('workingDirectory'),