packages/flutter_tools/lib/src/build_system/targets/macos.dart - external/github.com/flutter/flutter - Git at Google

 // Copyright 2014 The Flutter Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 import '../../artifacts.dart';
 import '../../base/build.dart';
 import '../../base/file_system.dart';
 import '../../base/io.dart';
 import '../../base/process.dart';
 import '../../build_info.dart';
 import '../../globals.dart' as globals hide fs, logger, artifacts, processManager;
 import '../build_system.dart';
 import '../depfile.dart';
 import '../exceptions.dart';
 import 'assets.dart';
 import 'common.dart';
 import 'icon_tree_shaker.dart';

 /// Copy the macOS framework to the correct copy dir by invoking 'cp -R'.
 ///
 /// This class is abstract to share logic between the three concrete
 /// implementations. The shelling out is done to avoid complications with
 /// preserving special files (e.g., symbolic links) in the framework structure.
 ///
 /// Removes any previous version of the framework that already exists in the
 /// target directory.
 ///
 /// The real implementations are:
 ///   * [DebugUnpackMacOS]
 ///   * [ProfileUnpackMacOS]
 ///   * [ReleaseUnpackMacOS]
 abstract class UnpackMacOS extends Target {
   const UnpackMacOS();

   @override
   List<Source> get inputs => const <Source>[
     Source.pattern('{FLUTTER_ROOT}/packages/flutter_tools/lib/src/build_system/targets/macos.dart'),
   ];

   @override
   List<Source> get outputs => const <Source>[];

   @override
   List<Target> get dependencies => <Target>[];

   @override
   List<String> get depfiles => const <String>['unpack_macos.d'];

   @override
   Future<void> build(Environment environment) async {
     if (environment.defines[kBuildMode] == null) {
       throw MissingDefineException(kBuildMode, 'unpack_macos');
     }
     final BuildMode buildMode = getBuildModeForName(environment.defines[kBuildMode]);
     final String basePath = environment.artifacts.getArtifactPath(Artifact.flutterMacOSFramework, mode: buildMode);
     final Directory targetDirectory = environment
       .outputDir
       .childDirectory('FlutterMacOS.framework');
     // Deleting this directory is required or else the FlutterMacOS module
     // cannot be found.
     if (targetDirectory.existsSync()) {
       targetDirectory.deleteSync(recursive: true);
     }
     final List<File> inputs = environment.fileSystem.directory(basePath)
       .listSync(recursive: true)
       .whereType<File>()
       .toList();
     final List<File> outputs = inputs.map((File file) {
       final String relativePath = environment.fileSystem.path.relative(file.path, from: basePath);
       return environment.fileSystem.file(environment.fileSystem.path.join(targetDirectory.path, relativePath));
     }).toList();
     final ProcessResult result = await environment.processManager
         .run(<String>['cp', '-R', basePath, targetDirectory.path]);
     if (result.exitCode != 0) {
       throw Exception(
         'Failed to copy framework (exit ${result.exitCode}:\n'
         '${result.stdout}\n---\n${result.stderr}',
       );
     }
     final DepfileService depfileService = DepfileService(
       logger: environment.logger,
       fileSystem: environment.fileSystem,
     );
     depfileService.writeToFile(
       Depfile(inputs, outputs),
       environment.buildDir.childFile('unpack_macos.d'),
     );
   }
 }

 /// Unpack the release prebuilt engine framework.
 class ReleaseUnpackMacOS extends UnpackMacOS {
   const ReleaseUnpackMacOS();

   @override
   String get name => 'release_unpack_macos';

   @override
   List<Source> get inputs => <Source>[
     ...super.inputs,
     const Source.artifact(Artifact.flutterMacOSFramework, mode: BuildMode.release),
   ];
 }

 /// Unpack the profile prebuilt engine framework.
 class ProfileUnpackMacOS extends UnpackMacOS {
   const ProfileUnpackMacOS();

   @override
   String get name => 'profile_unpack_macos';

   @override
   List<Source> get inputs => <Source>[
     ...super.inputs,
     const Source.artifact(Artifact.flutterMacOSFramework, mode: BuildMode.profile),
   ];
 }

 /// Unpack the debug prebuilt engine framework.
 class DebugUnpackMacOS extends UnpackMacOS {
   const DebugUnpackMacOS();

   @override
   String get name => 'debug_unpack_macos';

   @override
   List<Source> get inputs => <Source>[
     ...super.inputs,
     const Source.artifact(Artifact.flutterMacOSFramework, mode: BuildMode.debug),
   ];
 }

 /// Create an App.framework for debug macOS targets.
 ///
 /// This framework needs to exist for the Xcode project to link/bundle,
 /// but it isn't actually executed. To generate something valid, we compile a trivial
 /// constant.
 class DebugMacOSFramework extends Target {
   const DebugMacOSFramework();

   @override
   String get name => 'debug_macos_framework';

   @override
   Future<void> build(Environment environment) async {
     final File outputFile = environment.fileSystem.file(environment.fileSystem.path.join(
         environment.buildDir.path, 'App.framework', 'App'));
     outputFile.createSync(recursive: true);
     final File debugApp = environment.buildDir.childFile('debug_app.cc')
         ..writeAsStringSync(r'''
 static const int Moo = 88;
 ''');
     final RunResult result = await globals.xcode.clang(<String>[
       '-x',
       'c',
       debugApp.path,
       '-arch', 'x86_64',
       '-dynamiclib',
       '-Xlinker', '-rpath', '-Xlinker', '@executable_path/Frameworks',
       '-Xlinker', '-rpath', '-Xlinker', '@loader_path/Frameworks',
       '-install_name', '@rpath/App.framework/App',
       '-o', outputFile.path,
     ]);
     if (result.exitCode != 0) {
       throw Exception('Failed to compile debug App.framework');
     }
   }

   @override
   List<Target> get dependencies => const <Target>[];

   @override
   List<Source> get inputs => const <Source>[
     Source.pattern('{FLUTTER_ROOT}/packages/flutter_tools/lib/src/build_system/targets/macos.dart'),
   ];

   @override
   List<Source> get outputs => const <Source>[
     Source.pattern('{BUILD_DIR}/App.framework/App'),
   ];
 }

 class CompileMacOSFramework extends Target {
   const CompileMacOSFramework();

   @override
   String get name => 'compile_macos_framework';

   @override
   Future<void> build(Environment environment) async {
     if (environment.defines[kBuildMode] == null) {
       throw MissingDefineException(kBuildMode, 'compile_macos_framework');
     }
     final BuildMode buildMode = getBuildModeForName(environment.defines[kBuildMode]);
     if (buildMode == BuildMode.debug) {
       throw Exception('precompiled macOS framework only supported in release/profile builds.');
     }
     final String codeSizeDirectory = environment.defines[kCodeSizeDirectory];
     final String splitDebugInfo = environment.defines[kSplitDebugInfo];
     final bool dartObfuscation = environment.defines[kDartObfuscation] == 'true';
     final List<String> extraGenSnapshotOptions = decodeDartDefines(environment.defines, kExtraGenSnapshotOptions);

     if (codeSizeDirectory != null) {
       final File codeSizeFile = environment.fileSystem
         .directory(codeSizeDirectory)
         .childFile('snapshot.${getNameForDarwinArch(DarwinArch.x86_64)}.json');
       extraGenSnapshotOptions.add('--write-v8-snapshot-profile-to=${codeSizeFile.path}');
       final File precompilerTraceFile = environment.fileSystem
         .directory(codeSizeDirectory)
         .childFile('trace.${getNameForDarwinArch(DarwinArch.x86_64)}.json');
       extraGenSnapshotOptions.add('--write-v8-snapshot-profile-to=${codeSizeFile.path}');
       extraGenSnapshotOptions.add('--trace-precompiler-to=${precompilerTraceFile.path}');
     }

     final AOTSnapshotter snapshotter = AOTSnapshotter(
       reportTimings: false,
       fileSystem: environment.fileSystem,
       logger: environment.logger,
       xcode: globals.xcode,
       artifacts: environment.artifacts,
       processManager: environment.processManager
     );
     final int result = await snapshotter.build(
       bitcode: false,
       buildMode: buildMode,
       mainPath: environment.buildDir.childFile('app.dill').path,
       outputPath: environment.buildDir.path,
       platform: TargetPlatform.darwin_x64,
       darwinArch: DarwinArch.x86_64,
       packagesPath: environment.projectDir.childFile('.packages').path,
       splitDebugInfo: splitDebugInfo,
       dartObfuscation: dartObfuscation,
       extraGenSnapshotOptions: extraGenSnapshotOptions,
     );
     if (result != 0) {
       throw Exception('gen shapshot failed.');
     }
   }

   @override
   List<Target> get dependencies => const <Target>[
     KernelSnapshot(),
   ];

   @override
   List<Source> get inputs => const <Source>[
     Source.pattern('{BUILD_DIR}/app.dill'),
     Source.pattern('{FLUTTER_ROOT}/packages/flutter_tools/lib/src/build_system/targets/macos.dart'),
     Source.artifact(Artifact.genSnapshot, mode: BuildMode.release, platform: TargetPlatform.darwin_x64),
   ];

   @override
   List<Source> get outputs => const <Source>[
     Source.pattern('{BUILD_DIR}/App.framework/App'),
   ];
 }

 /// Bundle the flutter assets into the App.framework.
 ///
 /// In debug mode, also include the app.dill and precompiled runtimes.
 ///
 /// See https://developer.apple.com/library/archive/documentation/MacOSX/Conceptual/BPFrameworks/Concepts/FrameworkAnatomy.html
 /// for more information on Framework structure.
 abstract class MacOSBundleFlutterAssets extends Target {
   const MacOSBundleFlutterAssets();

   @override
   List<Source> get inputs => const <Source>[
     Source.pattern('{BUILD_DIR}/App.framework/App'),
     ...IconTreeShaker.inputs,
   ];

   @override
   List<Source> get outputs => const <Source>[
     Source.pattern('{OUTPUT_DIR}/App.framework/Versions/A/App'),
     Source.pattern('{OUTPUT_DIR}/App.framework/Versions/A/Resources/Info.plist'),
   ];

   @override
   List<String> get depfiles => const <String>[
     'flutter_assets.d',
   ];

   @override
   Future<void> build(Environment environment) async {
     if (environment.defines[kBuildMode] == null) {
       throw MissingDefineException(kBuildMode, 'compile_macos_framework');
     }
     final BuildMode buildMode = getBuildModeForName(environment.defines[kBuildMode]);
     final Directory frameworkRootDirectory = environment
         .outputDir
         .childDirectory('App.framework');
     final Directory outputDirectory = frameworkRootDirectory
         .childDirectory('Versions')
         .childDirectory('A')
         ..createSync(recursive: true);

     // Copy App into framework directory.
     environment.buildDir
       .childDirectory('App.framework')
       .childFile('App')
       .copySync(outputDirectory.childFile('App').path);

     // Copy assets into asset directory.
     final Directory assetDirectory = outputDirectory
       .childDirectory('Resources')
       .childDirectory('flutter_assets');
     assetDirectory.createSync(recursive: true);

     final Depfile assetDepfile = await copyAssets(
       environment,
       assetDirectory,
       targetPlatform: TargetPlatform.darwin_x64,
     );
     final DepfileService depfileService = DepfileService(
       fileSystem: environment.fileSystem,
       logger: environment.logger,
     );
     depfileService.writeToFile(
       assetDepfile,
       environment.buildDir.childFile('flutter_assets.d'),
     );

     // Copy Info.plist template.
     assetDirectory.parent.childFile('Info.plist')
       ..createSync()
       ..writeAsStringSync(r'''
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>en</string>
 	<key>CFBundleExecutable</key>
 	<string>App</string>
 	<key>CFBundleIdentifier</key>
 	<string>io.flutter.flutter.app</string>
 	<key>CFBundleInfoDictionaryVersion</key>
 	<string>6.0</string>
 	<key>CFBundleName</key>
 	<string>App</string>
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
 	<string>1.0</string>
 	<key>CFBundleVersion</key>
 	<string>1.0</string>
 </dict>
 </plist>

 ''');
     if (buildMode == BuildMode.debug) {
       // Copy dill file.
       try {
         final File sourceFile = environment.buildDir.childFile('app.dill');
         sourceFile.copySync(assetDirectory.childFile('kernel_blob.bin').path);
       } on Exception catch (err) {
         throw Exception('Failed to copy app.dill: $err');
       }
       // Copy precompiled runtimes.
       try {
         final String vmSnapshotData = environment.artifacts.getArtifactPath(Artifact.vmSnapshotData,
             platform: TargetPlatform.darwin_x64, mode: BuildMode.debug);
         final String isolateSnapshotData = environment.artifacts.getArtifactPath(Artifact.isolateSnapshotData,
             platform: TargetPlatform.darwin_x64, mode: BuildMode.debug);
         environment.fileSystem.file(vmSnapshotData).copySync(
             assetDirectory.childFile('vm_snapshot_data').path);
         environment.fileSystem.file(isolateSnapshotData).copySync(
             assetDirectory.childFile('isolate_snapshot_data').path);
       } on Exception catch (err) {
         throw Exception('Failed to copy precompiled runtimes: $err');
       }
     }
     // Create symlink to current version. These must be relative, from the
     // framework root for Resources/App and from the versions root for
     // Current.
     try {
       final Link currentVersion = outputDirectory.parent
           .childLink('Current');
       if (!currentVersion.existsSync()) {
         final String linkPath = environment.fileSystem.path.relative(outputDirectory.path,
             from: outputDirectory.parent.path);
         currentVersion.createSync(linkPath);
       }
       // Create symlink to current resources.
       final Link currentResources = frameworkRootDirectory
           .childLink('Resources');
       if (!currentResources.existsSync()) {
         final String linkPath = environment.fileSystem.path.relative(environment.fileSystem.path.join(currentVersion.path, 'Resources'),
             from: frameworkRootDirectory.path);
         currentResources.createSync(linkPath);
       }
       // Create symlink to current binary.
       final Link currentFramework = frameworkRootDirectory
           .childLink('App');
       if (!currentFramework.existsSync()) {
         final String linkPath = environment.fileSystem.path.relative(environment.fileSystem.path.join(currentVersion.path, 'App'),
             from: frameworkRootDirectory.path);
         currentFramework.createSync(linkPath);
       }
     } on FileSystemException {
       throw Exception('Failed to create symlinks for framework. try removing '
         'the "${environment.outputDir.path}" directory and rerunning');
     }
   }
 }

 /// Bundle the debug flutter assets into the App.framework.
 class DebugMacOSBundleFlutterAssets extends MacOSBundleFlutterAssets {
   const DebugMacOSBundleFlutterAssets();

   @override
   String get name => 'debug_macos_bundle_flutter_assets';

   @override
   List<Target> get dependencies => const <Target>[
     KernelSnapshot(),
     DebugMacOSFramework(),
     DebugUnpackMacOS(),
   ];

   @override
   List<Source> get inputs => <Source>[
     ...super.inputs,
     const Source.pattern('{BUILD_DIR}/app.dill'),
     const Source.artifact(Artifact.isolateSnapshotData, platform: TargetPlatform.darwin_x64, mode: BuildMode.debug),
     const Source.artifact(Artifact.vmSnapshotData, platform: TargetPlatform.darwin_x64, mode: BuildMode.debug),
   ];

   @override
   List<Source> get outputs => <Source>[
     ...super.outputs,
     const Source.pattern('{OUTPUT_DIR}/App.framework/Versions/A/Resources/flutter_assets/kernel_blob.bin'),
     const Source.pattern('{OUTPUT_DIR}/App.framework/Versions/A/Resources/flutter_assets/vm_snapshot_data'),
     const Source.pattern('{OUTPUT_DIR}/App.framework/Versions/A/Resources/flutter_assets/isolate_snapshot_data'),
   ];
 }

 /// Bundle the profile flutter assets into the App.framework.
 class ProfileMacOSBundleFlutterAssets extends MacOSBundleFlutterAssets {
   const ProfileMacOSBundleFlutterAssets();

   @override
   String get name => 'profile_macos_bundle_flutter_assets';

   @override
   List<Target> get dependencies => const <Target>[
     CompileMacOSFramework(),
     ProfileUnpackMacOS(),
   ];
 }


 /// Bundle the release flutter assets into the App.framework.
 class ReleaseMacOSBundleFlutterAssets extends MacOSBundleFlutterAssets {
   const ReleaseMacOSBundleFlutterAssets();

   @override
   String get name => 'release_macos_bundle_flutter_assets';

   @override
   List<Target> get dependencies => const <Target>[
     CompileMacOSFramework(),
     ReleaseUnpackMacOS(),
   ];
 }
	// Copyright 2014 The Flutter Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	import '../../artifacts.dart';
	import '../../base/build.dart';
	import '../../base/file_system.dart';
	import '../../base/io.dart';
	import '../../base/process.dart';
	import '../../build_info.dart';
	import '../../globals.dart' as globals hide fs, logger, artifacts, processManager;
	import '../build_system.dart';
	import '../depfile.dart';
	import '../exceptions.dart';
	import 'assets.dart';
	import 'common.dart';
	import 'icon_tree_shaker.dart';

	/// Copy the macOS framework to the correct copy dir by invoking 'cp -R'.
	///
	/// This class is abstract to share logic between the three concrete
	/// implementations. The shelling out is done to avoid complications with
	/// preserving special files (e.g., symbolic links) in the framework structure.
	///
	/// Removes any previous version of the framework that already exists in the
	/// target directory.
	///
	/// The real implementations are:
	/// * [DebugUnpackMacOS]
	/// * [ProfileUnpackMacOS]
	/// * [ReleaseUnpackMacOS]
	abstract class UnpackMacOS extends Target {
	const UnpackMacOS();

	@override
	List<Source> get inputs => const <Source>[
	Source.pattern('{FLUTTER_ROOT}/packages/flutter_tools/lib/src/build_system/targets/macos.dart'),
	];

	@override
	List<Source> get outputs => const <Source>[];

	@override
	List<Target> get dependencies => <Target>[];

	@override
	List<String> get depfiles => const <String>['unpack_macos.d'];

	@override
	Future<void> build(Environment environment) async {
	if (environment.defines[kBuildMode] == null) {
	throw MissingDefineException(kBuildMode, 'unpack_macos');
	}
	final BuildMode buildMode = getBuildModeForName(environment.defines[kBuildMode]);
	final String basePath = environment.artifacts.getArtifactPath(Artifact.flutterMacOSFramework, mode: buildMode);
	final Directory targetDirectory = environment
	.outputDir
	.childDirectory('FlutterMacOS.framework');
	// Deleting this directory is required or else the FlutterMacOS module
	// cannot be found.
	if (targetDirectory.existsSync()) {
	targetDirectory.deleteSync(recursive: true);
	}
	final List<File> inputs = environment.fileSystem.directory(basePath)
	.listSync(recursive: true)
	.whereType<File>()
	.toList();
	final List<File> outputs = inputs.map((File file) {
	final String relativePath = environment.fileSystem.path.relative(file.path, from: basePath);
	return environment.fileSystem.file(environment.fileSystem.path.join(targetDirectory.path, relativePath));
	}).toList();
	final ProcessResult result = await environment.processManager
	.run(<String>['cp', '-R', basePath, targetDirectory.path]);
	if (result.exitCode != 0) {
	throw Exception(
	'Failed to copy framework (exit ${result.exitCode}:\n'
	'${result.stdout}\n---\n${result.stderr}',
	);
	}
	final DepfileService depfileService = DepfileService(
	logger: environment.logger,
	fileSystem: environment.fileSystem,
	);
	depfileService.writeToFile(
	Depfile(inputs, outputs),
	environment.buildDir.childFile('unpack_macos.d'),
	);
	}
	}

	/// Unpack the release prebuilt engine framework.
	class ReleaseUnpackMacOS extends UnpackMacOS {
	const ReleaseUnpackMacOS();

	@override
	String get name => 'release_unpack_macos';

	@override
	List<Source> get inputs => <Source>[
	...super.inputs,
	const Source.artifact(Artifact.flutterMacOSFramework, mode: BuildMode.release),
	];
	}

	/// Unpack the profile prebuilt engine framework.
	class ProfileUnpackMacOS extends UnpackMacOS {
	const ProfileUnpackMacOS();

	@override
	String get name => 'profile_unpack_macos';

	@override
	List<Source> get inputs => <Source>[
	...super.inputs,
	const Source.artifact(Artifact.flutterMacOSFramework, mode: BuildMode.profile),
	];
	}

	/// Unpack the debug prebuilt engine framework.
	class DebugUnpackMacOS extends UnpackMacOS {
	const DebugUnpackMacOS();

	@override
	String get name => 'debug_unpack_macos';

	@override
	List<Source> get inputs => <Source>[
	...super.inputs,
	const Source.artifact(Artifact.flutterMacOSFramework, mode: BuildMode.debug),
	];
	}

	/// Create an App.framework for debug macOS targets.
	///
	/// This framework needs to exist for the Xcode project to link/bundle,
	/// but it isn't actually executed. To generate something valid, we compile a trivial
	/// constant.
	class DebugMacOSFramework extends Target {
	const DebugMacOSFramework();

	@override
	String get name => 'debug_macos_framework';

	@override
	Future<void> build(Environment environment) async {
	final File outputFile = environment.fileSystem.file(environment.fileSystem.path.join(
	environment.buildDir.path, 'App.framework', 'App'));
	outputFile.createSync(recursive: true);
	final File debugApp = environment.buildDir.childFile('debug_app.cc')
	..writeAsStringSync(r'''
	static const int Moo = 88;
	''');
	final RunResult result = await globals.xcode.clang(<String>[
	'-x',
	'c',
	debugApp.path,
	'-arch', 'x86_64',
	'-dynamiclib',
	'-Xlinker', '-rpath', '-Xlinker', '@executable_path/Frameworks',
	'-Xlinker', '-rpath', '-Xlinker', '@loader_path/Frameworks',
	'-install_name', '@rpath/App.framework/App',
	'-o', outputFile.path,
	]);
	if (result.exitCode != 0) {
	throw Exception('Failed to compile debug App.framework');
	}
	}

	@override
	List<Target> get dependencies => const <Target>[];

	@override
	List<Source> get inputs => const <Source>[
	Source.pattern('{FLUTTER_ROOT}/packages/flutter_tools/lib/src/build_system/targets/macos.dart'),
	];

	@override
	List<Source> get outputs => const <Source>[
	Source.pattern('{BUILD_DIR}/App.framework/App'),
	];
	}

	class CompileMacOSFramework extends Target {
	const CompileMacOSFramework();

	@override
	String get name => 'compile_macos_framework';

	@override
	Future<void> build(Environment environment) async {
	if (environment.defines[kBuildMode] == null) {
	throw MissingDefineException(kBuildMode, 'compile_macos_framework');
	}
	final BuildMode buildMode = getBuildModeForName(environment.defines[kBuildMode]);
	if (buildMode == BuildMode.debug) {
	throw Exception('precompiled macOS framework only supported in release/profile builds.');
	}
	final String codeSizeDirectory = environment.defines[kCodeSizeDirectory];
	final String splitDebugInfo = environment.defines[kSplitDebugInfo];
	final bool dartObfuscation = environment.defines[kDartObfuscation] == 'true';
	final List<String> extraGenSnapshotOptions = decodeDartDefines(environment.defines, kExtraGenSnapshotOptions);

	if (codeSizeDirectory != null) {
	final File codeSizeFile = environment.fileSystem
	.directory(codeSizeDirectory)
	.childFile('snapshot.${getNameForDarwinArch(DarwinArch.x86_64)}.json');
	extraGenSnapshotOptions.add('--write-v8-snapshot-profile-to=${codeSizeFile.path}');
	final File precompilerTraceFile = environment.fileSystem
	.directory(codeSizeDirectory)
	.childFile('trace.${getNameForDarwinArch(DarwinArch.x86_64)}.json');
	extraGenSnapshotOptions.add('--write-v8-snapshot-profile-to=${codeSizeFile.path}');
	extraGenSnapshotOptions.add('--trace-precompiler-to=${precompilerTraceFile.path}');
	}

	final AOTSnapshotter snapshotter = AOTSnapshotter(
	reportTimings: false,
	fileSystem: environment.fileSystem,
	logger: environment.logger,
	xcode: globals.xcode,
	artifacts: environment.artifacts,
	processManager: environment.processManager
	);
	final int result = await snapshotter.build(
	bitcode: false,
	buildMode: buildMode,
	mainPath: environment.buildDir.childFile('app.dill').path,
	outputPath: environment.buildDir.path,
	platform: TargetPlatform.darwin_x64,
	darwinArch: DarwinArch.x86_64,
	packagesPath: environment.projectDir.childFile('.packages').path,
	splitDebugInfo: splitDebugInfo,
	dartObfuscation: dartObfuscation,
	extraGenSnapshotOptions: extraGenSnapshotOptions,
	);
	if (result != 0) {
	throw Exception('gen shapshot failed.');
	}
	}

	@override
	List<Target> get dependencies => const <Target>[
	KernelSnapshot(),
	];

	@override
	List<Source> get inputs => const <Source>[
	Source.pattern('{BUILD_DIR}/app.dill'),
	Source.pattern('{FLUTTER_ROOT}/packages/flutter_tools/lib/src/build_system/targets/macos.dart'),
	Source.artifact(Artifact.genSnapshot, mode: BuildMode.release, platform: TargetPlatform.darwin_x64),
	];

	@override
	List<Source> get outputs => const <Source>[
	Source.pattern('{BUILD_DIR}/App.framework/App'),
	];
	}

	/// Bundle the flutter assets into the App.framework.
	///
	/// In debug mode, also include the app.dill and precompiled runtimes.
	///
	/// See https://developer.apple.com/library/archive/documentation/MacOSX/Conceptual/BPFrameworks/Concepts/FrameworkAnatomy.html
	/// for more information on Framework structure.
	abstract class MacOSBundleFlutterAssets extends Target {
	const MacOSBundleFlutterAssets();

	@override
	List<Source> get inputs => const <Source>[
	Source.pattern('{BUILD_DIR}/App.framework/App'),
	...IconTreeShaker.inputs,
	];

	@override
	List<Source> get outputs => const <Source>[
	Source.pattern('{OUTPUT_DIR}/App.framework/Versions/A/App'),
	Source.pattern('{OUTPUT_DIR}/App.framework/Versions/A/Resources/Info.plist'),
	];

	@override
	List<String> get depfiles => const <String>[
	'flutter_assets.d',
	];

	@override
	Future<void> build(Environment environment) async {
	if (environment.defines[kBuildMode] == null) {
	throw MissingDefineException(kBuildMode, 'compile_macos_framework');
	}
	final BuildMode buildMode = getBuildModeForName(environment.defines[kBuildMode]);
	final Directory frameworkRootDirectory = environment
	.outputDir
	.childDirectory('App.framework');
	final Directory outputDirectory = frameworkRootDirectory
	.childDirectory('Versions')
	.childDirectory('A')
	..createSync(recursive: true);

	// Copy App into framework directory.
	environment.buildDir
	.childDirectory('App.framework')
	.childFile('App')
	.copySync(outputDirectory.childFile('App').path);

	// Copy assets into asset directory.
	final Directory assetDirectory = outputDirectory
	.childDirectory('Resources')
	.childDirectory('flutter_assets');
	assetDirectory.createSync(recursive: true);

	final Depfile assetDepfile = await copyAssets(
	environment,
	assetDirectory,
	targetPlatform: TargetPlatform.darwin_x64,
	);
	final DepfileService depfileService = DepfileService(
	fileSystem: environment.fileSystem,
	logger: environment.logger,
	);
	depfileService.writeToFile(
	assetDepfile,
	environment.buildDir.childFile('flutter_assets.d'),
	);

	// Copy Info.plist template.
	assetDirectory.parent.childFile('Info.plist')
	..createSync()
	..writeAsStringSync(r'''
	<?xml version="1.0" encoding="UTF-8"?>
	<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
	<plist version="1.0">
	<dict>
	<key>CFBundleDevelopmentRegion</key>
	<string>en</string>
	<key>CFBundleExecutable</key>
	<string>App</string>
	<key>CFBundleIdentifier</key>
	<string>io.flutter.flutter.app</string>
	<key>CFBundleInfoDictionaryVersion</key>
	<string>6.0</string>
	<key>CFBundleName</key>
	<string>App</string>
	<key>CFBundlePackageType</key>
	<string>FMWK</string>
	<key>CFBundleShortVersionString</key>
	<string>1.0</string>
	<key>CFBundleVersion</key>
	<string>1.0</string>
	</dict>
	</plist>

	''');
	if (buildMode == BuildMode.debug) {
	// Copy dill file.
	try {
	final File sourceFile = environment.buildDir.childFile('app.dill');
	sourceFile.copySync(assetDirectory.childFile('kernel_blob.bin').path);
	} on Exception catch (err) {
	throw Exception('Failed to copy app.dill: $err');
	}
	// Copy precompiled runtimes.
	try {
	final String vmSnapshotData = environment.artifacts.getArtifactPath(Artifact.vmSnapshotData,
	platform: TargetPlatform.darwin_x64, mode: BuildMode.debug);
	final String isolateSnapshotData = environment.artifacts.getArtifactPath(Artifact.isolateSnapshotData,
	platform: TargetPlatform.darwin_x64, mode: BuildMode.debug);
	environment.fileSystem.file(vmSnapshotData).copySync(
	assetDirectory.childFile('vm_snapshot_data').path);
	environment.fileSystem.file(isolateSnapshotData).copySync(
	assetDirectory.childFile('isolate_snapshot_data').path);
	} on Exception catch (err) {
	throw Exception('Failed to copy precompiled runtimes: $err');
	}
	}
	// Create symlink to current version. These must be relative, from the
	// framework root for Resources/App and from the versions root for
	// Current.
	try {
	final Link currentVersion = outputDirectory.parent
	.childLink('Current');
	if (!currentVersion.existsSync()) {
	final String linkPath = environment.fileSystem.path.relative(outputDirectory.path,
	from: outputDirectory.parent.path);
	currentVersion.createSync(linkPath);
	}
	// Create symlink to current resources.
	final Link currentResources = frameworkRootDirectory
	.childLink('Resources');
	if (!currentResources.existsSync()) {
	final String linkPath = environment.fileSystem.path.relative(environment.fileSystem.path.join(currentVersion.path, 'Resources'),
	from: frameworkRootDirectory.path);
	currentResources.createSync(linkPath);
	}
	// Create symlink to current binary.
	final Link currentFramework = frameworkRootDirectory
	.childLink('App');
	if (!currentFramework.existsSync()) {
	final String linkPath = environment.fileSystem.path.relative(environment.fileSystem.path.join(currentVersion.path, 'App'),
	from: frameworkRootDirectory.path);
	currentFramework.createSync(linkPath);
	}
	} on FileSystemException {
	throw Exception('Failed to create symlinks for framework. try removing '
	'the "${environment.outputDir.path}" directory and rerunning');
	}
	}
	}

	/// Bundle the debug flutter assets into the App.framework.
	class DebugMacOSBundleFlutterAssets extends MacOSBundleFlutterAssets {
	const DebugMacOSBundleFlutterAssets();

	@override
	String get name => 'debug_macos_bundle_flutter_assets';

	@override
	List<Target> get dependencies => const <Target>[
	KernelSnapshot(),
	DebugMacOSFramework(),
	DebugUnpackMacOS(),
	];

	@override
	List<Source> get inputs => <Source>[
	...super.inputs,
	const Source.pattern('{BUILD_DIR}/app.dill'),
	const Source.artifact(Artifact.isolateSnapshotData, platform: TargetPlatform.darwin_x64, mode: BuildMode.debug),
	const Source.artifact(Artifact.vmSnapshotData, platform: TargetPlatform.darwin_x64, mode: BuildMode.debug),
	];

	@override
	List<Source> get outputs => <Source>[
	...super.outputs,
	const Source.pattern('{OUTPUT_DIR}/App.framework/Versions/A/Resources/flutter_assets/kernel_blob.bin'),
	const Source.pattern('{OUTPUT_DIR}/App.framework/Versions/A/Resources/flutter_assets/vm_snapshot_data'),
	const Source.pattern('{OUTPUT_DIR}/App.framework/Versions/A/Resources/flutter_assets/isolate_snapshot_data'),
	];
	}

	/// Bundle the profile flutter assets into the App.framework.
	class ProfileMacOSBundleFlutterAssets extends MacOSBundleFlutterAssets {
	const ProfileMacOSBundleFlutterAssets();

	@override
	String get name => 'profile_macos_bundle_flutter_assets';

	@override
	List<Target> get dependencies => const <Target>[
	CompileMacOSFramework(),
	ProfileUnpackMacOS(),
	];
	}


	/// Bundle the release flutter assets into the App.framework.
	class ReleaseMacOSBundleFlutterAssets extends MacOSBundleFlutterAssets {
	const ReleaseMacOSBundleFlutterAssets();

	@override
	String get name => 'release_macos_bundle_flutter_assets';

	@override
	List<Target> get dependencies => const <Target>[
	CompileMacOSFramework(),
	ReleaseUnpackMacOS(),
	];
	}