Get iOS devices working on Mac if you specify sky-src-path.

packages/flutter_tools/lib/src/device.dart

@@ -92,6 +92,9 @@ class IOSDevice extends _Device {
   String _loggerPath;
   String get loggerPath => _loggerPath;
 
+  String _pusherPath;
+  String get pusherPath => _pusherPath;
+
   String _name;
   String get name => _name;
 
@@ -107,6 +110,13 @@ class IOSDevice extends _Device {
     _informerPath = _checkForCommand('ideviceinfo');
     _debuggerPath = _checkForCommand('idevicedebug');
     _loggerPath = _checkForCommand('idevicesyslog');
+    _pusherPath = _checkForCommand(
+        'ios-deploy',
+        'To copy files to iOS devices, please install ios-deploy. '
+        'You can do this using homebrew as follows:\n'
+        '\$ brew tap flutter/flutter\n'
+        '\$ brew install ios-deploy',
+        'Copying files to iOS devices is not currently supported on Linux.');
   }
 
   static List<IOSDevice> getAttachedDevices([IOSDevice mockIOS]) {
@@ -208,6 +218,33 @@ class IOSDevice extends _Device {
     return false;
   }
 
+  Future<bool> pushFile(
+      ApplicationPackage app, String localFile, String targetFile) async {
+    if (Platform.isMacOS) {
+      runSync([
+        pusherPath,
+        '-t',
+        '1',
+        '--bundle_id',
+        app.appPackageID,
+        '--upload',
+        localFile,
+        '--to',
+        targetFile
+      ]);
+      return true;
+    } else {
+      // TODO(iansf): It may be possible to make this work on Linux. Since this
+      //              functionality appears to be the only that prevents us from
+      //              supporting iOS on Linux, it may be worth putting some time
+      //              into investigating this.
+      //              See https://bbs.archlinux.org/viewtopic.php?id=192655
+      return false;
+    }
+    return false;
+  }
+
+  /// Note that clear is not supported on iOS at this time.
   Future<int> logs({bool clear: false}) {
     return runCommandAndStreamOutput([loggerPath],
         prefix: 'IOS DEV: ', filter: new RegExp(r'.*SkyShell.*'));

packages/flutter_tools/lib/src/listen.dart

@@ -19,22 +19,14 @@ class ListenCommand extends Command {
   final name = 'listen';
   final description = 'Listen for changes to files and reload the running app '
       'on all connected devices.';
-  AndroidDevice android = null;
+  AndroidDevice android;
+  IOSDevice ios;
   List<String> watchCommand;
 
   /// Only run once.  Used for testing.
   bool singleRun;
 
-  ListenCommand({this.android, this.singleRun: false}) {
-    argParser.addFlag('checked',
-        negatable: true,
-        defaultsTo: true,
-        help: 'Toggle Dart\'s checked mode.');
-    argParser.addOption('target',
-        defaultsTo: '.',
-        abbr: 't',
-        help: 'Target app path or filename to start.');
-  }
+  ListenCommand({this.android, this.ios, this.singleRun: false}) {}
 
   @override
   Future<int> run() async {
@@ -42,6 +34,10 @@ class ListenCommand extends Command {
       android = new AndroidDevice();
     }
 
+    if (ios == null) {
+      ios = new IOSDevice();
+    }
+
     if (argResults.rest.length > 0) {
       watchCommand = _initWatchCommand(argResults.rest);
     } else {
@@ -51,10 +47,37 @@ class ListenCommand extends Command {
     Map<BuildPlatform, ApplicationPackage> packages =
         ApplicationPackageFactory.getAvailableApplicationPackages();
     ApplicationPackage androidApp = packages[BuildPlatform.android];
+    ApplicationPackage iosApp = packages[BuildPlatform.iOS];
 
     while (true) {
       _logging.info('Updating running Sky apps...');
 
+      // TODO(iansf): refactor build command so that this doesn't have
+      //              to call out like this.
+      List<String> command = ['pub', 'run', 'sky_tools', 'build',];
+
+      try {
+        // In testing, sky-src-path isn't added to the options, and
+        // the ArgParser module throws an exception, so we have to
+        // catch and ignore the error in order to test.
+        if (globalResults.wasParsed('sky-src-path')) {
+          command.addAll([
+            // TODO(iansf): Don't rely on sky-src-path for the snapshotter.
+            '--compiler',
+            '${globalResults['sky-src-path']}'
+                '/out/ios_Debug/clang_x64/sky_snapshot'
+          ]);
+        }
+      } catch (e) {}
+      runSync(command);
+
+      String localFLXPath = 'app.flx';
+      String remoteFLXPath = 'Documents/app.flx';
+
+      if (ios.isConnected()) {
+        await ios.pushFile(iosApp, localFLXPath, remoteFLXPath);
+      }
+
       if (android.isConnected()) {
         await android.startServer(
             argResults['target'], true, argResults['checked'], androidApp);

packages/flutter_tools/test/listen_test.dart

@@ -20,8 +20,10 @@ defineTests() {
 
       MockAndroidDevice android = new MockAndroidDevice();
       when(android.isConnected()).thenReturn(false);
+      MockIOSDevice ios = new MockIOSDevice();
+      when(ios.isConnected()).thenReturn(false);
       ListenCommand command =
-          new ListenCommand(android: android, singleRun: true);
+          new ListenCommand(android: android, ios: ios, singleRun: true);
 
       CommandRunner runner = new CommandRunner('test_flutter', '')
         ..addCommand(command);