remove flutter listen (#6198)

packages/flutter_tools/lib/executable.dart

@@ -23,7 +23,6 @@ import 'src/commands/doctor.dart';
 import 'src/commands/drive.dart';
 import 'src/commands/format.dart';
 import 'src/commands/install.dart';
-import 'src/commands/listen.dart';
 import 'src/commands/logs.dart';
 import 'src/commands/setup.dart';
 import 'src/commands/packages.dart';
@@ -70,7 +69,6 @@ Future<Null> main(List<String> args) async {
     ..addCommand(new DriveCommand())
     ..addCommand(new FormatCommand())
     ..addCommand(new InstallCommand())
-    ..addCommand(new ListenCommand())
     ..addCommand(new LogsCommand())
     ..addCommand(new PackagesCommand())
     ..addCommand(new PrecacheCommand())

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

@@ -1,129 +0,0 @@
-// Copyright 2015 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 'dart:async';
-import 'dart:io';
-
-import '../base/os.dart';
-import '../base/process.dart';
-import '../cache.dart';
-import '../device.dart';
-import '../globals.dart';
-import 'run.dart';
-
-class ListenCommand extends RunCommandBase {
-  ListenCommand({ this.singleRun: false });
-
-  @override
-  final String name = 'listen';
-
-  @override
-  final String description = 'Listen for changes to files and reload the running app.';
-
-  @override
-  final String usageFooter =
-    'By default, only listens to "./" and "./lib/". To listen to additional directories, list them on\n'
-    'the command line.';
-
-  /// Only run once. Used for testing.
-  final bool singleRun;
-
-  Device device;
-
-  @override
-  Future<int> verifyThenRunCommand() async {
-    if (!commandValidator())
-      return 1;
-    device = await findTargetDevice();
-    if (device == null)
-      return 1;
-    return super.verifyThenRunCommand();
-  }
-
-  @override
-  Future<int> runCommand() async {
-    Iterable<String> directories = () sync* {
-      yield* argResults.rest;
-      yield '.';
-      yield 'lib';
-    }();
-
-    List<String> watchCommand = _constructWatchCommand(directories);
-
-    if (watchCommand == null)
-      return 1;
-
-    Cache.releaseLockEarly();
-
-    printStatus('Listening for changes in '
-      '${directories.map((String name) => "'$name${Platform.pathSeparator}'").join(', ')}'
-      '.');
-
-    int result = 0;
-    bool firstTime = true;
-    do {
-      printStatus('');
-
-      // TODO(devoncarew): We could print out here what changes we detected that caused a re-run.
-      if (!firstTime)
-        printStatus('Re-running app...');
-
-      result = await startApp(
-        device,
-        target: targetFile,
-        install: firstTime,
-        stop: true,
-        debuggingOptions: new DebuggingOptions.enabled(getBuildMode()),
-        traceStartup: traceStartup,
-        route: route
-      );
-      firstTime = false;
-    } while (!singleRun && result == 0 && _watchDirectory(watchCommand));
-
-    return 0;
-  }
-
-  List<String> _constructWatchCommand(Iterable<String> directories) {
-    if (Platform.isMacOS) {
-      if (os.which('fswatch') == null) {
-        printError('"listen" command is only useful if you have installed '
-          'fswatch on Mac. Run "brew install fswatch" to install it with homebrew.');
-        return null;
-      } else {
-        return <String>['fswatch', '-r', '-v', '-1']..addAll(directories);
-      }
-    } else if (Platform.isLinux) {
-      if (os.which('inotifywait') == null) {
-        printError('"listen" command is only useful if you have installed '
-          'inotifywait on Linux. Run "apt-get install inotify-tools" or '
-          'equivalent to install it.');
-        return null;
-      } else {
-        return <String>[
-          'inotifywait',
-          '-r',
-          '-e',
-          // Only listen for events that matter, to avoid triggering constantly
-          // from the editor watching files.
-          'modify,close_write,move,create,delete',
-        ]..addAll(directories);
-      }
-    } else {
-      printError('"listen" command is only available on Mac and Linux.');
-    }
-
-    return null;
-  }
-
-  bool _watchDirectory(List<String> watchCommand) {
-    assert(watchCommand != null);
-    try {
-      runCheckedSync(watchCommand);
-    } catch (e) {
-      printError('Watching directories failed.', e);
-      return false;
-    }
-    return true;
-  }
-}

packages/flutter_tools/test/all.dart

@@ -28,7 +28,6 @@ import 'devices_test.dart' as devices_test;
 import 'drive_test.dart' as drive_test;
 import 'format_test.dart' as format_test;
 import 'install_test.dart' as install_test;
-import 'listen_test.dart' as listen_test;
 import 'logs_test.dart' as logs_test;
 import 'os_utils_test.dart' as os_utils_test;
 import 'packages_test.dart' as packages_test;
@@ -62,7 +61,6 @@ void main() {
   drive_test.main();
   format_test.main();
   install_test.main();
-  listen_test.main();
   logs_test.main();
   os_utils_test.main();
   packages_test.main();

packages/flutter_tools/test/listen_test.dart

@@ -1,22 +0,0 @@
-// Copyright 2015 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:flutter_tools/src/commands/listen.dart';
-import 'package:test/test.dart';
-
-import 'src/common.dart';
-import 'src/context.dart';
-import 'src/mocks.dart';
-
-void main() {
-  group('listen', () {
-    testUsingContext('returns 1 when no device is connected', () {
-      ListenCommand command = new ListenCommand(singleRun: true);
-      applyMocksToCommand(command);
-      return createTestCommandRunner(command).run(<String>['listen']).then((int code) {
-        expect(code, 1);
-      });
-    });
-  });
-}