[flutter_tools] remove deprecated flutter command (#67478)

packages/flutter_tools/lib/executable.dart

@@ -42,7 +42,6 @@ import 'src/commands/test.dart';
 import 'src/commands/train.dart';
 import 'src/commands/update_packages.dart';
 import 'src/commands/upgrade.dart';
-import 'src/commands/version.dart';
 import 'src/features.dart';
 import 'src/globals.dart' as globals;
 // Files in `isolated` are intentionally excluded from google3 tooling.
@@ -116,7 +115,6 @@ Future<void> main(List<String> args) async {
     ShellCompletionCommand(),
     TestCommand(verboseHelp: verboseHelp),
     UpgradeCommand(),
-    VersionCommand(),
     SymbolizeCommand(
       stdio: globals.stdio,
       fileSystem: globals.fs,

packages/flutter_tools/lib/src/commands/version.dart

-// 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 '../base/common.dart';
-import '../base/io.dart';
-import '../base/os.dart';
-import '../base/process.dart';
-import '../base/version.dart';
-import '../cache.dart';
-import '../dart/pub.dart';
-import '../globals.dart' as globals;
-import '../runner/flutter_command.dart';
-
-class VersionCommand extends FlutterCommand {
-  VersionCommand() : super() {
-    argParser.addFlag('force',
-      abbr: 'f',
-      help: 'Force switch to older Flutter versions that do not include a version command',
-    );
-    // Don't use usesPubOption here. That will cause the version command to
-    // require a pubspec.yaml file, which it doesn't need.
-    argParser.addFlag('pub',
-      defaultsTo: true,
-      hide: true,
-      help: 'Whether to run "flutter pub get" after switching versions.',
-    );
-  }
-
-  @override
-  bool get deprecated => true;
-
-  @override
-  final String name = 'version';
-
-  @override
-  final String description = 'List or switch flutter versions.';
-
-  // The first version of Flutter which includes the flutter version command. Switching to older
-  // versions will require the user to manually upgrade.
-  Version minSupportedVersion = Version.parse('1.2.1');
-
-  Future<List<String>> getTags() async {
-    globals.flutterVersion.fetchTagsAndUpdate();
-    RunResult runResult;
-    try {
-      runResult = await processUtils.run(
-        <String>['git', 'tag', '-l', '*.*.*', '--sort=-creatordate'],
-        throwOnError: true,
-        workingDirectory: Cache.flutterRoot,
-      );
-    } on ProcessException catch (error) {
-      throwToolExit(
-        'Unable to get the tags. '
-        'This is likely due to an internal git error.'
-        '\nError: $error.'
-      );
-    }
-    return runResult.toString().split('\n');
-  }
-
-  @override
-  Future<FlutterCommandResult> runCommand() async {
-    final List<String> tags = await getTags();
-    if (argResults.rest.isEmpty) {
-      tags.forEach(globals.printStatus);
-      return FlutterCommandResult.success();
-    }
-
-    globals.printStatus(
-      '╔══════════════════════════════════════════════════════════════════════════════╗\n'
-      '║ Warning: "flutter version" will leave the SDK in a detached HEAD state.      ║\n'
-      '║ If you are using the command to return to a previously installed SDK version ║\n'
-      '║ consider using the "flutter downgrade" command instead.                      ║\n'
-      '╚══════════════════════════════════════════════════════════════════════════════╝\n',
-      emphasis: true,
-    );
-    if (globals.stdio.stdinHasTerminal) {
-      globals.terminal.usesTerminalUi = true;
-      final String result = await globals.terminal.promptForCharInput(
-        <String>['y', 'n'],
-        logger: globals.logger,
-        prompt: 'Are you sure you want to proceed?'
-      );
-      if (result == 'n') {
-        return FlutterCommandResult.success();
-      }
-    }
-
-    final String version = argResults.rest[0].replaceFirst(RegExp('^v'), '');
-    final List<String> matchingTags = tags.where((String tag) => tag.contains(version)).toList();
-    String matchingTag;
-    // TODO(fujino): make this a tool exit and fix tests
-    if (matchingTags.isEmpty) {
-      globals.printError('There is no version: $version');
-      matchingTag = version;
-    } else {
-      matchingTag = matchingTags.first.trim();
-    }
-
-    // check min supported version
-    final Version targetVersion = Version.parse(version);
-    if (targetVersion == null) {
-      throwToolExit('Failed to parse version "$version"');
-    }
-
-    bool withForce = false;
-    if (targetVersion < minSupportedVersion) {
-      if (!boolArg('force')) {
-        globals.printError(
-          'Version command is not supported in $targetVersion and it is supported since version $minSupportedVersion '
-          'which means if you switch to version $minSupportedVersion then you can not use version command. '
-          'If you really want to switch to version $targetVersion, please use `--force` flag: `flutter version --force $targetVersion`.'
-        );
-        return const FlutterCommandResult(ExitStatus.success);
-      }
-      withForce = true;
-    }
-
-    try {
-      await processUtils.run(
-        <String>['git', 'checkout', matchingTag],
-        throwOnError: true,
-        workingDirectory: Cache.flutterRoot,
-      );
-    } on Exception catch (e) {
-      throwToolExit('Unable to checkout version branch for version $version: $e');
-    }
-
-    globals.printStatus('Switching Flutter to version $matchingTag${withForce ? ' with force' : ''}');
-
-    // Check for and download any engine and pkg/ updates.
-    // We run the 'flutter' shell script re-entrantly here
-    // so that it will download the updated Dart and so forth
-    // if necessary.
-    globals.printStatus('Downloading engine...');
-    int code = await processUtils.stream(<String>[
-      globals.fs.path.join('bin', 'flutter'),
-      '--no-color',
-      'precache',
-    ], workingDirectory: Cache.flutterRoot, allowReentrantFlutter: true);
-
-    if (code != 0) {
-      throwToolExit(null, exitCode: code);
-    }
-
-    final String projectRoot = findProjectRoot();
-    if (projectRoot != null && boolArg('pub')) {
-      globals.printStatus('');
-      await pub.get(
-        context: PubContext.pubUpgrade,
-        directory: projectRoot,
-        upgrade: true,
-        checkLastModified: false,
-        generateSyntheticPackage: false,
-      );
-    }
-
-    // Run a doctor check in case system requirements have changed.
-    globals.printStatus('');
-    globals.printStatus('Running flutter doctor...');
-    code = await processUtils.stream(
-      <String>[
-        globals.fs.path.join('bin', 'flutter'),
-        'doctor',
-      ],
-      workingDirectory: Cache.flutterRoot,
-      allowReentrantFlutter: true,
-    );
-
-    if (code != 0) {
-      throwToolExit(null, exitCode: code);
-    }
-
-    return FlutterCommandResult.success();
-  }
-}