no longer necessary with ddc fix (#33271)

packages/flutter_tools/bin/web_swap.dart

-// Copyright 2019 The Chromium 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:args/args.dart';
-import 'package:flutter_tools/src/base/file_system.dart';
-import 'package:flutter_tools/src/cache.dart';
-import 'package:flutter_tools/src/context_runner.dart';
-import 'package:flutter_tools/src/globals.dart';
-import 'package:flutter_tools/src/runner/flutter_command_runner.dart';
-
-final ArgParser argParser = ArgParser()
-  ..addFlag('back', help: 'Swap back to dart:ui from web_ui', defaultsTo: false);
-
-/// Swap the dart:ui imports with web_ui for local development.
-///
-/// This is only intended as a temporary bridge to the new development
-/// workflow and will be removed at a later time.
-Future<void> main(List<String> arguments) async {
-  final ArgResults results = argParser.parse(arguments);
-  await runInContext(() {
-    // Normally this is initialized by the command runner.
-    Cache.flutterRoot = FlutterCommandRunner.defaultFlutterRoot;
-    printError(
-      'WARNING: This is only intended for use by flutter contributors.'
-      ' Running this command will alter the code in your flutter checkout.'
-    );
-    final String engineDirectory = fs.path.join(Cache.flutterRoot, '..', 'engine', 'src', 'flutter', 'lib', 'stub_ui');
-    final String flutterPath = fs.path.join(Cache.flutterRoot, 'packages', 'flutter');
-    final String flutterTestPath = fs.path.join(Cache.flutterRoot, 'packages', 'flutter_test');
-    final List<List<Pattern>> codePatterns = <List<Pattern>>[
-      <Pattern>['import \'dart:ui\'', 'import \'package:flutter_web_ui/ui.dart\''],
-      <Pattern>['export \'dart:ui\'', 'export \'package:flutter_web_ui/ui.dart\''],
-      <Pattern>[
-        'export \'bitfield.dart\' if (dart.library.html) \'bitfield_unsupported.dart\';',
-        'export \'bitfield_unsupported.dart\';'
-      ]
-    ];
-    final List<List<Pattern>> configPatterns = <List<Pattern>>[
-      <Pattern>[
-'''
-sky_engine:
-  sdk: flutter
-''',
-'''
-flutter_web_ui:
-  path: $engineDirectory
-'''
-      ],
-      <Pattern>[
-'''
-flutter:
-  sdk: flutter
-''',
-'''
-flutter:
-  path: $flutterPath
-'''
-      ],
-      <Pattern>[
-'''
-flutter_driver:
-  sdk: flutter
-''',
-'''
-#  flutter_driver:
-#    sdk: flutter
-'''
-      ],
-      <Pattern>[
-'''
-flutter_test:
-  sdk: flutter
-''',
-'''
-flutter_test:
-  path: $flutterTestPath
-build_runner: '>=0.8.10 <2.0.0'
-build_web_compilers: '>=0.3.6 <2.0.0'
-  '''
-      ],
-      <Pattern>[
-r'''
-flutter_goldens:
-  sdk: flutter
-''',
-r'''
-#  flutter_goldens:
-#    sdk: flutter
-'''
-      ],
-    ];
-
-    final Iterable<File> searchFiles = <Directory>[
-      fs.directory(fs.path.join(Cache.flutterRoot, 'packages')),
-      fs.directory(fs.path.join(Cache.flutterRoot, 'examples')),
-    ].expand((Directory directory) => directory.listSync(recursive: true))
-      .whereType<File>()
-      .where((File file) => file.path.endsWith('.dart') || file.path.endsWith('pubspec.yaml'));
-
-    for (File file in searchFiles) {
-      String contents = file.readAsStringSync();
-      final List<List<Pattern>> patterns = file.path.endsWith('.dart')
-          ? codePatterns
-          : configPatterns;
-      if (file.path.endsWith('.dart')) {
-        for (List<Pattern> patterns in patterns) {
-          contents = results['back']
-              ? contents.replaceAll(patterns.last, patterns.first)
-              : contents.replaceAll(patterns.first, patterns.last);
-        }
-        file.writeAsStringSync(contents);
-      }
-    }
-  });
-}
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