packages/flutter_tools/lib/src/windows/build_windows.dart - mirrors/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 'package:unified_analytics/unified_analytics.dart';

 import '../artifacts.dart';
 import '../base/analyze_size.dart';
 import '../base/common.dart';
 import '../base/file_system.dart';
 import '../base/logger.dart';
 import '../base/project_migrator.dart';
 import '../base/terminal.dart';
 import '../base/utils.dart';
 import '../build_info.dart';
 import '../cache.dart';
 import '../cmake.dart';
 import '../cmake_project.dart';
 import '../convert.dart';
 import '../flutter_plugins.dart';
 import '../globals.dart' as globals;
 import '../migrations/cmake_custom_command_migration.dart';
 import '../migrations/cmake_native_assets_migration.dart';
 import 'migrations/build_architecture_migration.dart';
 import 'migrations/show_window_migration.dart';
 import 'migrations/version_migration.dart';
 import 'visual_studio.dart';

 // These characters appear to be fine: @%()-+_{}[]`~
 const String _kBadCharacters = r"'#!$^&*=|,;<>?";

 /// Builds the Windows project using msbuild.
 Future<void> buildWindows(
   WindowsProject windowsProject,
   BuildInfo buildInfo,
   TargetPlatform targetPlatform, {
   String? target,
   VisualStudio? visualStudioOverride,
   SizeAnalyzer? sizeAnalyzer,
 }) async {
   // MSBuild files generated by CMake do not properly escape some characters
   // In the directories. This check produces more meaningful error messages
   // on failure as pertains to https://github.com/flutter/flutter/issues/104802
   final String projectPath = windowsProject.parent.directory.absolute.path;
   final bool badPath = _kBadCharacters.runes
       .any((int i) => projectPath.contains(String.fromCharCode(i)));
   if (badPath) {
     throwToolExit(
       'Path $projectPath contains invalid characters in "$_kBadCharacters". '
       'Please rename your directory so as to not include any of these characters '
       'and retry.',
     );
   }

   if (!windowsProject.cmakeFile.existsSync()) {
     throwToolExit(
       'No Windows desktop project configured. See '
       'https://docs.flutter.dev/desktop#add-desktop-support-to-an-existing-flutter-app '
       'to learn about adding Windows support to a project.');
   }

   final Directory buildDirectory = globals.fs.directory(globals.fs.path.join(
     projectPath,
     getWindowsBuildDirectory(targetPlatform),
   ));

   final List<ProjectMigrator> migrators = <ProjectMigrator>[
     CmakeCustomCommandMigration(windowsProject, globals.logger),
     CmakeNativeAssetsMigration(windowsProject, 'windows', globals.logger),
     VersionMigration(windowsProject, globals.logger),
     ShowWindowMigration(windowsProject, globals.logger),
     BuildArchitectureMigration(windowsProject, buildDirectory, globals.logger),
   ];

   final ProjectMigration migration = ProjectMigration(migrators);
   await migration.run();

   // Ensure that necessary ephemeral files are generated and up to date.
   _writeGeneratedFlutterConfig(windowsProject, buildInfo, target);
   createPluginSymlinks(windowsProject.parent);

   final VisualStudio visualStudio = visualStudioOverride ?? VisualStudio(
     fileSystem: globals.fs,
     platform: globals.platform,
     logger: globals.logger,
     processManager: globals.processManager,
     osUtils: globals.os,
   );
   final String? cmakePath = visualStudio.cmakePath;
   final String? cmakeGenerator = visualStudio.cmakeGenerator;
   if (cmakePath == null || cmakeGenerator == null) {
     throwToolExit('Unable to find suitable Visual Studio toolchain. '
         'Please run `flutter doctor` for more details.');
   }

   final String buildModeName = buildInfo.mode.cliName;
   final Status status = globals.logger.startProgress(
     'Building Windows application...',
   );
   try {
     await _runCmakeGeneration(
       cmakePath: cmakePath,
       generator: cmakeGenerator,
       targetPlatform: targetPlatform,
       buildDir: buildDirectory,
       sourceDir: windowsProject.cmakeFile.parent,
     );
     if (visualStudio.displayVersion == '17.1.0') {
       _fixBrokenCmakeGeneration(buildDirectory);
     }
     await _runBuild(cmakePath, buildDirectory, buildModeName);
   } finally {
     status.stop();
   }

   final String? binaryName = getCmakeExecutableName(windowsProject);
   final File binaryFile = buildDirectory
     .childDirectory('runner')
     .childDirectory(sentenceCase(buildModeName))
     .childFile('$binaryName.exe');
   final FileSystemEntity buildOutput =  binaryFile.existsSync() ? binaryFile : binaryFile.parent;
   // We don't print a size because the output directory can contain
   // optional files not needed by the user and because the binary is not
   // self-contained.
   globals.logger.printStatus(
     '${globals.logger.terminal.successMark} '
     'Built ${globals.fs.path.relative(buildOutput.path)}',
     color: TerminalColor.green,
   );

   if (buildInfo.codeSizeDirectory != null && sizeAnalyzer != null) {
     final String arch = getNameForTargetPlatform(targetPlatform);
     final File codeSizeFile = globals.fs.directory(buildInfo.codeSizeDirectory)
       .childFile('snapshot.$arch.json');
     final File precompilerTrace = globals.fs.directory(buildInfo.codeSizeDirectory)
       .childFile('trace.$arch.json');
     final Map<String, Object?> output = await sizeAnalyzer.analyzeAotSnapshot(
       aotSnapshot: codeSizeFile,
       // This analysis is only supported for release builds.
       outputDirectory: globals.fs.directory(
         globals.fs.path.join(
           buildDirectory.path,
           'runner',
           'Release'
         ),
       ),
       precompilerTrace: precompilerTrace,
       type: 'windows',
     );
     final File outputFile = globals.fsUtils.getUniqueFile(
       globals.fs
         .directory(globals.fsUtils.homeDirPath)
         .childDirectory('.flutter-devtools'), 'windows-code-size-analysis', 'json',
     )..writeAsStringSync(jsonEncode(output));
     // This message is used as a sentinel in analyze_apk_size_test.dart
     globals.printStatus(
       'A summary of your Windows bundle analysis can be found at: ${outputFile.path}',
     );

     // DevTools expects a file path relative to the .flutter-devtools/ dir.
     final String relativeAppSizePath = outputFile.path.split('.flutter-devtools/').last.trim();
     globals.printStatus(
       '\nTo analyze your app size in Dart DevTools, run the following command:\n'
       'dart devtools --appSizeBase=$relativeAppSizePath'
     );
   }
 }

 String getCmakeWindowsArch(TargetPlatform targetPlatform) {
   return switch (targetPlatform) {
     TargetPlatform.windows_x64 => 'x64',
     TargetPlatform.windows_arm64 => 'ARM64',
     _ => throw Exception('Unsupported target platform "$targetPlatform".'),
   };
 }

 Future<void> _runCmakeGeneration({
   required String cmakePath,
   required String generator,
   required TargetPlatform targetPlatform,
   required Directory buildDir,
   required Directory sourceDir,
 }) async {
   final Stopwatch sw = Stopwatch()..start();

   await buildDir.create(recursive: true);
   int result;

   try {
     result = await globals.processUtils.stream(
       <String>[
         cmakePath,
         '-S',
         sourceDir.path,
         '-B',
         buildDir.path,
         '-G',
         generator,
         '-A',
         getCmakeWindowsArch(targetPlatform),
         '-DFLUTTER_TARGET_PLATFORM=${getNameForTargetPlatform(targetPlatform)}',
       ],
       trace: true,
     );
   } on ArgumentError {
     throwToolExit("cmake not found. Run 'flutter doctor' for more information.");
   }
   if (result != 0) {
     throwToolExit('Unable to generate build files');
   }
   final Duration elapsedDuration = sw.elapsed;
   globals.flutterUsage.sendTiming('build', 'windows-cmake-generation', elapsedDuration);
   globals.analytics.send(Event.timing(
     workflow: 'build',
     variableName: 'windows-cmake-generation',
     elapsedMilliseconds: elapsedDuration.inMilliseconds,
   ));
 }

 Future<void> _runBuild(
   String cmakePath,
   Directory buildDir,
   String buildModeName,
   { bool install = true }
 ) async {
   final Stopwatch sw = Stopwatch()..start();

   // MSBuild sends all output to stdout, including build errors. This surfaces
   // known error patterns.
   final RegExp errorMatcher = RegExp(
     <String>[
       // Known error messages
       r'(:\s*(?:warning|(?:fatal )?error).*?:)',
       r'Error detected in pubspec\.yaml:',

       // Known secondary error lines for pubspec.yaml
       r'No file or variants found for asset:',
     ].join('|'),
   );

   int result;
   try {
     result = await globals.processUtils.stream(
       <String>[
         cmakePath,
         '--build',
         buildDir.path,
         '--config',
         sentenceCase(buildModeName),
         if (install)
           ...<String>['--target', 'INSTALL'],
         if (globals.logger.isVerbose)
           '--verbose',
       ],
       environment: <String, String>{
         if (globals.logger.isVerbose)
           'VERBOSE_SCRIPT_LOGGING': 'true',
       },
       trace: true,
       stdoutErrorMatcher: errorMatcher,
     );
   } on ArgumentError {
     throwToolExit("cmake not found. Run 'flutter doctor' for more information.");
   }
   if (result != 0) {
     throwToolExit('Build process failed.');
   }
   final Duration elapsedDuration = sw.elapsed;
   globals.flutterUsage.sendTiming('build', 'windows-cmake-build', elapsedDuration);
   globals.analytics.send(Event.timing(
     workflow: 'build',
     variableName: 'windows-cmake-build',
     elapsedMilliseconds: elapsedDuration.inMilliseconds,
   ));
 }

 /// Writes the generated CMake file with the configuration for the given build.
 void _writeGeneratedFlutterConfig(
   WindowsProject windowsProject,
   BuildInfo buildInfo,
   String? target,
 ) {
   final Map<String, String> environment = <String, String>{
     'FLUTTER_ROOT': Cache.flutterRoot!,
     'FLUTTER_EPHEMERAL_DIR': windowsProject.ephemeralDirectory.path,
     'PROJECT_DIR': windowsProject.parent.directory.path,
     if (target != null)
       'FLUTTER_TARGET': target,
     ...buildInfo.toEnvironmentConfig(),
   };
   final LocalEngineInfo? localEngineInfo = globals.artifacts?.localEngineInfo;
   if (localEngineInfo != null) {
     final String targetOutPath = localEngineInfo.targetOutPath;
     // Get the engine source root $ENGINE/src/out/foo_bar_baz -> $ENGINE/src
     environment['FLUTTER_ENGINE'] = globals.fs.path.dirname(globals.fs.path.dirname(targetOutPath));
     environment['LOCAL_ENGINE'] = localEngineInfo.localTargetName;
     environment['LOCAL_ENGINE_HOST'] = localEngineInfo.localHostName;
   }
   writeGeneratedCmakeConfig(Cache.flutterRoot!, windowsProject, buildInfo, environment, globals.logger);
 }

 // Works around the Visual Studio 17.1.0 CMake bug described in
 // https://github.com/flutter/flutter/issues/97086
 //
 // Rather than attempt to remove all the duplicate entries within the
 // <CustomBuild> element, which would require a more complicated parser, this
 // just fixes the incorrect duplicates to have the correct `$<CONFIG>` value,
 // making the duplication harmless.
 //
 // TODO(stuartmorgan): Remove this workaround either once 17.1.0 is
 // sufficiently old that we no longer need to support it, or when
 // dropping VS 2022 support.
 void _fixBrokenCmakeGeneration(Directory buildDirectory) {
   final File assembleProject = buildDirectory
     .childDirectory('flutter')
     .childFile('flutter_assemble.vcxproj');
   if (assembleProject.existsSync()) {
     // E.g.: <Command Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
     final RegExp commandRegex = RegExp(
       r'<Command Condition=.*\(Configuration\)\|\$\(Platform\).==.(Debug|Profile|Release)\|');
     // E.g.: [...]/flutter_tools/bin/tool_backend.bat windows-x64 Debug
     final RegExp assembleCallRegex = RegExp(
       r'^.*/tool_backend\.bat windows[^ ]* (Debug|Profile|Release)');
     String? lastCommandConditionConfig;
     final StringBuffer newProjectContents = StringBuffer();
     // vcxproj files contain a BOM, which readAsLinesSync drops; re-add it.
     newProjectContents.writeCharCode(unicodeBomCharacterRune);
     for (final String line in assembleProject.readAsLinesSync()) {
       final RegExpMatch? commandMatch = commandRegex.firstMatch(line);
       if (commandMatch != null) {
         lastCommandConditionConfig = commandMatch.group(1);
       } else if (lastCommandConditionConfig != null) {
         final RegExpMatch? assembleCallMatch = assembleCallRegex.firstMatch(line);
         if (assembleCallMatch != null) {
           final String callConfig = assembleCallMatch.group(1)!;
           if (callConfig != lastCommandConditionConfig) {
             // The config is the end of the line; make sure to replace that one,
             // in case config-matching strings appear anywhere else in the line
             // (e.g., the project path).
             final int badConfigIndex = line.lastIndexOf(assembleCallMatch.group(1)!);
             final String correctedLine = line.replaceFirst(
               callConfig, lastCommandConditionConfig, badConfigIndex);
             newProjectContents.writeln('$correctedLine\r');
             continue;
           }
         }
       }
       newProjectContents.writeln('$line\r');
     }
     assembleProject.writeAsStringSync(newProjectContents.toString());
   }
 }
	// 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 'package:unified_analytics/unified_analytics.dart';

	import '../artifacts.dart';
	import '../base/analyze_size.dart';
	import '../base/common.dart';
	import '../base/file_system.dart';
	import '../base/logger.dart';
	import '../base/project_migrator.dart';
	import '../base/terminal.dart';
	import '../base/utils.dart';
	import '../build_info.dart';
	import '../cache.dart';
	import '../cmake.dart';
	import '../cmake_project.dart';
	import '../convert.dart';
	import '../flutter_plugins.dart';
	import '../globals.dart' as globals;
	import '../migrations/cmake_custom_command_migration.dart';
	import '../migrations/cmake_native_assets_migration.dart';
	import 'migrations/build_architecture_migration.dart';
	import 'migrations/show_window_migration.dart';
	import 'migrations/version_migration.dart';
	import 'visual_studio.dart';

	// These characters appear to be fine: @%()-+_{}[]`~
	const String _kBadCharacters = r"'#!$^&*=\|,;<>?";

	/// Builds the Windows project using msbuild.
	Future<void> buildWindows(
	WindowsProject windowsProject,
	BuildInfo buildInfo,
	TargetPlatform targetPlatform, {
	String? target,
	VisualStudio? visualStudioOverride,
	SizeAnalyzer? sizeAnalyzer,
	}) async {
	// MSBuild files generated by CMake do not properly escape some characters
	// In the directories. This check produces more meaningful error messages
	// on failure as pertains to https://github.com/flutter/flutter/issues/104802
	final String projectPath = windowsProject.parent.directory.absolute.path;
	final bool badPath = _kBadCharacters.runes
	.any((int i) => projectPath.contains(String.fromCharCode(i)));
	if (badPath) {
	throwToolExit(
	'Path $projectPath contains invalid characters in "$_kBadCharacters". '
	'Please rename your directory so as to not include any of these characters '
	'and retry.',
	);
	}

	if (!windowsProject.cmakeFile.existsSync()) {
	throwToolExit(
	'No Windows desktop project configured. See '
	'https://docs.flutter.dev/desktop#add-desktop-support-to-an-existing-flutter-app '
	'to learn about adding Windows support to a project.');
	}

	final Directory buildDirectory = globals.fs.directory(globals.fs.path.join(
	projectPath,
	getWindowsBuildDirectory(targetPlatform),
	));

	final List<ProjectMigrator> migrators = <ProjectMigrator>[
	CmakeCustomCommandMigration(windowsProject, globals.logger),
	CmakeNativeAssetsMigration(windowsProject, 'windows', globals.logger),
	VersionMigration(windowsProject, globals.logger),
	ShowWindowMigration(windowsProject, globals.logger),
	BuildArchitectureMigration(windowsProject, buildDirectory, globals.logger),
	];

	final ProjectMigration migration = ProjectMigration(migrators);
	await migration.run();

	// Ensure that necessary ephemeral files are generated and up to date.
	_writeGeneratedFlutterConfig(windowsProject, buildInfo, target);
	createPluginSymlinks(windowsProject.parent);

	final VisualStudio visualStudio = visualStudioOverride ?? VisualStudio(
	fileSystem: globals.fs,
	platform: globals.platform,
	logger: globals.logger,
	processManager: globals.processManager,
	osUtils: globals.os,
	);
	final String? cmakePath = visualStudio.cmakePath;
	final String? cmakeGenerator = visualStudio.cmakeGenerator;
	if (cmakePath == null \|\| cmakeGenerator == null) {
	throwToolExit('Unable to find suitable Visual Studio toolchain. '
	'Please run `flutter doctor` for more details.');
	}

	final String buildModeName = buildInfo.mode.cliName;
	final Status status = globals.logger.startProgress(
	'Building Windows application...',
	);
	try {
	await _runCmakeGeneration(
	cmakePath: cmakePath,
	generator: cmakeGenerator,
	targetPlatform: targetPlatform,
	buildDir: buildDirectory,
	sourceDir: windowsProject.cmakeFile.parent,
	);
	if (visualStudio.displayVersion == '17.1.0') {
	_fixBrokenCmakeGeneration(buildDirectory);
	}
	await _runBuild(cmakePath, buildDirectory, buildModeName);
	} finally {
	status.stop();
	}

	final String? binaryName = getCmakeExecutableName(windowsProject);
	final File binaryFile = buildDirectory
	.childDirectory('runner')
	.childDirectory(sentenceCase(buildModeName))
	.childFile('$binaryName.exe');
	final FileSystemEntity buildOutput = binaryFile.existsSync() ? binaryFile : binaryFile.parent;
	// We don't print a size because the output directory can contain
	// optional files not needed by the user and because the binary is not
	// self-contained.
	globals.logger.printStatus(
	'${globals.logger.terminal.successMark} '
	'Built ${globals.fs.path.relative(buildOutput.path)}',
	color: TerminalColor.green,
	);

	if (buildInfo.codeSizeDirectory != null && sizeAnalyzer != null) {
	final String arch = getNameForTargetPlatform(targetPlatform);
	final File codeSizeFile = globals.fs.directory(buildInfo.codeSizeDirectory)
	.childFile('snapshot.$arch.json');
	final File precompilerTrace = globals.fs.directory(buildInfo.codeSizeDirectory)
	.childFile('trace.$arch.json');
	final Map<String, Object?> output = await sizeAnalyzer.analyzeAotSnapshot(
	aotSnapshot: codeSizeFile,
	// This analysis is only supported for release builds.
	outputDirectory: globals.fs.directory(
	globals.fs.path.join(
	buildDirectory.path,
	'runner',
	'Release'
	),
	),
	precompilerTrace: precompilerTrace,
	type: 'windows',
	);
	final File outputFile = globals.fsUtils.getUniqueFile(
	globals.fs
	.directory(globals.fsUtils.homeDirPath)
	.childDirectory('.flutter-devtools'), 'windows-code-size-analysis', 'json',
	)..writeAsStringSync(jsonEncode(output));
	// This message is used as a sentinel in analyze_apk_size_test.dart
	globals.printStatus(
	'A summary of your Windows bundle analysis can be found at: ${outputFile.path}',
	);

	// DevTools expects a file path relative to the .flutter-devtools/ dir.
	final String relativeAppSizePath = outputFile.path.split('.flutter-devtools/').last.trim();
	globals.printStatus(
	'\nTo analyze your app size in Dart DevTools, run the following command:\n'
	'dart devtools --appSizeBase=$relativeAppSizePath'
	);
	}
	}

	String getCmakeWindowsArch(TargetPlatform targetPlatform) {
	return switch (targetPlatform) {
	TargetPlatform.windows_x64 => 'x64',
	TargetPlatform.windows_arm64 => 'ARM64',
	_ => throw Exception('Unsupported target platform "$targetPlatform".'),
	};
	}

	Future<void> _runCmakeGeneration({
	required String cmakePath,
	required String generator,
	required TargetPlatform targetPlatform,
	required Directory buildDir,
	required Directory sourceDir,
	}) async {
	final Stopwatch sw = Stopwatch()..start();

	await buildDir.create(recursive: true);
	int result;

	try {
	result = await globals.processUtils.stream(
	<String>[
	cmakePath,
	'-S',
	sourceDir.path,
	'-B',
	buildDir.path,
	'-G',
	generator,
	'-A',
	getCmakeWindowsArch(targetPlatform),
	'-DFLUTTER_TARGET_PLATFORM=${getNameForTargetPlatform(targetPlatform)}',
	],
	trace: true,
	);
	} on ArgumentError {
	throwToolExit("cmake not found. Run 'flutter doctor' for more information.");
	}
	if (result != 0) {
	throwToolExit('Unable to generate build files');
	}
	final Duration elapsedDuration = sw.elapsed;
	globals.flutterUsage.sendTiming('build', 'windows-cmake-generation', elapsedDuration);
	globals.analytics.send(Event.timing(
	workflow: 'build',
	variableName: 'windows-cmake-generation',
	elapsedMilliseconds: elapsedDuration.inMilliseconds,
	));
	}

	Future<void> _runBuild(
	String cmakePath,
	Directory buildDir,
	String buildModeName,
	{ bool install = true }
	) async {
	final Stopwatch sw = Stopwatch()..start();

	// MSBuild sends all output to stdout, including build errors. This surfaces
	// known error patterns.
	final RegExp errorMatcher = RegExp(
	<String>[
	// Known error messages
	r'(:\s(?:warning\|(?:fatal )?error).?:)',
	r'Error detected in pubspec\.yaml:',

	// Known secondary error lines for pubspec.yaml
	r'No file or variants found for asset:',
	].join('\|'),
	);

	int result;
	try {
	result = await globals.processUtils.stream(
	<String>[
	cmakePath,
	'--build',
	buildDir.path,
	'--config',
	sentenceCase(buildModeName),
	if (install)
	...<String>['--target', 'INSTALL'],
	if (globals.logger.isVerbose)
	'--verbose',
	],
	environment: <String, String>{
	if (globals.logger.isVerbose)
	'VERBOSE_SCRIPT_LOGGING': 'true',
	},
	trace: true,
	stdoutErrorMatcher: errorMatcher,
	);
	} on ArgumentError {
	throwToolExit("cmake not found. Run 'flutter doctor' for more information.");
	}
	if (result != 0) {
	throwToolExit('Build process failed.');
	}
	final Duration elapsedDuration = sw.elapsed;
	globals.flutterUsage.sendTiming('build', 'windows-cmake-build', elapsedDuration);
	globals.analytics.send(Event.timing(
	workflow: 'build',
	variableName: 'windows-cmake-build',
	elapsedMilliseconds: elapsedDuration.inMilliseconds,
	));
	}

	/// Writes the generated CMake file with the configuration for the given build.
	void _writeGeneratedFlutterConfig(
	WindowsProject windowsProject,
	BuildInfo buildInfo,
	String? target,
	) {
	final Map<String, String> environment = <String, String>{
	'FLUTTER_ROOT': Cache.flutterRoot!,
	'FLUTTER_EPHEMERAL_DIR': windowsProject.ephemeralDirectory.path,
	'PROJECT_DIR': windowsProject.parent.directory.path,
	if (target != null)
	'FLUTTER_TARGET': target,
	...buildInfo.toEnvironmentConfig(),
	};
	final LocalEngineInfo? localEngineInfo = globals.artifacts?.localEngineInfo;
	if (localEngineInfo != null) {
	final String targetOutPath = localEngineInfo.targetOutPath;
	// Get the engine source root $ENGINE/src/out/foo_bar_baz -> $ENGINE/src
	environment['FLUTTER_ENGINE'] = globals.fs.path.dirname(globals.fs.path.dirname(targetOutPath));
	environment['LOCAL_ENGINE'] = localEngineInfo.localTargetName;
	environment['LOCAL_ENGINE_HOST'] = localEngineInfo.localHostName;
	}
	writeGeneratedCmakeConfig(Cache.flutterRoot!, windowsProject, buildInfo, environment, globals.logger);
	}

	// Works around the Visual Studio 17.1.0 CMake bug described in
	// https://github.com/flutter/flutter/issues/97086
	//
	// Rather than attempt to remove all the duplicate entries within the
	// <CustomBuild> element, which would require a more complicated parser, this
	// just fixes the incorrect duplicates to have the correct `$<CONFIG>` value,
	// making the duplication harmless.
	//
	// TODO(stuartmorgan): Remove this workaround either once 17.1.0 is
	// sufficiently old that we no longer need to support it, or when
	// dropping VS 2022 support.
	void _fixBrokenCmakeGeneration(Directory buildDirectory) {
	final File assembleProject = buildDirectory
	.childDirectory('flutter')
	.childFile('flutter_assemble.vcxproj');
	if (assembleProject.existsSync()) {
	// E.g.: <Command Condition="'$(Configuration)\|$(Platform)'=='Debug\|x64'">
	final RegExp commandRegex = RegExp(
	r'<Command Condition=.*\(Configuration\)\\|\$\(Platform\).==.(Debug\|Profile\|Release)\\|');
	// E.g.: [...]/flutter_tools/bin/tool_backend.bat windows-x64 Debug
	final RegExp assembleCallRegex = RegExp(
	r'^./tool_backend\.bat windows[^ ] (Debug\|Profile\|Release)');
	String? lastCommandConditionConfig;
	final StringBuffer newProjectContents = StringBuffer();
	// vcxproj files contain a BOM, which readAsLinesSync drops; re-add it.
	newProjectContents.writeCharCode(unicodeBomCharacterRune);
	for (final String line in assembleProject.readAsLinesSync()) {
	final RegExpMatch? commandMatch = commandRegex.firstMatch(line);
	if (commandMatch != null) {
	lastCommandConditionConfig = commandMatch.group(1);
	} else if (lastCommandConditionConfig != null) {
	final RegExpMatch? assembleCallMatch = assembleCallRegex.firstMatch(line);
	if (assembleCallMatch != null) {
	final String callConfig = assembleCallMatch.group(1)!;
	if (callConfig != lastCommandConditionConfig) {
	// The config is the end of the line; make sure to replace that one,
	// in case config-matching strings appear anywhere else in the line
	// (e.g., the project path).
	final int badConfigIndex = line.lastIndexOf(assembleCallMatch.group(1)!);
	final String correctedLine = line.replaceFirst(
	callConfig, lastCommandConditionConfig, badConfigIndex);
	newProjectContents.writeln('$correctedLine\r');
	continue;
	}
	}
	}
	newProjectContents.writeln('$line\r');
	}
	assembleProject.writeAsStringSync(newProjectContents.toString());
	}
	}