Ignore unreachable iOS devices in IOSDevice.getAttachedDevices (#23776)

AUTHORS

@@ -29,3 +29,4 @@ Lukasz Piliszczuk <lukasz@intheloup.io>
 Felix Schmidt <felix.free@gmx.de>
 Artur Rymarz <artur.rymarz@gmail.com>
 Stefan Mitev <mr.mitew@gmail.com>
+Mattijs Fuijkschot <mattijs.fuijkschot@gmail.com>

packages/flutter_tools/lib/src/ios/devices.dart

@@ -149,9 +149,14 @@ class IOSDevice extends Device {
       if (id.isEmpty)
         continue;
 
+      try {
         final String deviceName = await iMobileDevice.getInfoForDevice(id, 'DeviceName');
         final String sdkVersion = await iMobileDevice.getInfoForDevice(id, 'ProductVersion');
         devices.add(IOSDevice(id, name: deviceName, sdkVersion: sdkVersion));
+      } on IOSDeviceNotFoundError catch (error) {
+        // Unable to find device with given udid. Possibly a network device.
+        printTrace('Error getting attached iOS device: $error');
+      }
     }
     return devices;
   }

packages/flutter_tools/lib/src/ios/mac.dart

@@ -83,6 +83,17 @@ class PropertyList {
   }
 }
 
+/// Specialized exception for expected situations where the ideviceinfo
+/// tool responds with exit code 255 / 'No device found' message
+class IOSDeviceNotFoundError implements Exception {
+  IOSDeviceNotFoundError(this.message);
+
+  final String message;
+
+  @override
+  String toString() => message;
+}
+
 class IMobileDevice {
   const IMobileDevice();
 
@@ -118,11 +129,13 @@ class IMobileDevice {
   Future<String> getInfoForDevice(String deviceID, String key) async {
     try {
       final ProcessResult result = await processManager.run(<String>['ideviceinfo', '-u', deviceID, '-k', key, '--simple']);
+      if (result.exitCode == 255 && result.stdout != null && result.stdout.contains('No device found'))
+        throw IOSDeviceNotFoundError('ideviceinfo could not find device:\n${result.stdout}');
       if (result.exitCode != 0)
-        throw ToolExit('idevice_id returned an error:\n${result.stderr}');
+        throw ToolExit('ideviceinfo returned an error:\n${result.stderr}');
       return result.stdout.trim();
     } on ProcessException {
-      throw ToolExit('Failed to invoke idevice_id. Run flutter doctor.');
+      throw ToolExit('Failed to invoke ideviceinfo. Run flutter doctor.');
     }
   }
 

packages/flutter_tools/test/ios/devices_test.dart

@@ -77,6 +77,25 @@ f577a7903cc54959be2e34bc4f7f80b7009efcf4
     }, overrides: <Type, Generator>{
       IMobileDevice: () => mockIMobileDevice,
     });
+
+    testUsingContext('returns attached devices and ignores devices that cannot be found by ideviceinfo', () async {
+      when(iMobileDevice.isInstalled).thenReturn(true);
+      when(iMobileDevice.getAvailableDeviceIDs())
+          .thenAnswer((Invocation invocation) => Future<String>.value('''
+98206e7a4afd4aedaff06e687594e089dede3c44
+f577a7903cc54959be2e34bc4f7f80b7009efcf4
+'''));
+      when(iMobileDevice.getInfoForDevice('98206e7a4afd4aedaff06e687594e089dede3c44', 'DeviceName'))
+          .thenAnswer((_) => Future<String>.value('La tele me regarde'));
+      when(iMobileDevice.getInfoForDevice('f577a7903cc54959be2e34bc4f7f80b7009efcf4', 'DeviceName'))
+          .thenThrow(IOSDeviceNotFoundError('Device not found'));
+      final List<IOSDevice> devices = await IOSDevice.getAttachedDevices();
+      expect(devices, hasLength(1));
+      expect(devices[0].id, '98206e7a4afd4aedaff06e687594e089dede3c44');
+      expect(devices[0].name, 'La tele me regarde');
+    }, overrides: <Type, Generator>{
+      IMobileDevice: () => mockIMobileDevice,
+    });
   });
 
   group('decodeSyslog', () {

packages/flutter_tools/test/ios/mac_test.dart

@@ -127,6 +127,14 @@ void main() {
       ProcessManager: () => mockProcessManager,
     });
 
+    testUsingContext('getInfoForDevice throws IOSDeviceNotFoundError when ideviceinfo returns specific error code and message', () async {
+      when(mockProcessManager.run(<String>['ideviceinfo', '-u', 'foo', '-k', 'bar', '--simple']))
+          .thenAnswer((_) => Future<ProcessResult>.value(ProcessResult(1, 255, 'No device found with udid foo, is it plugged in?', '')));
+      expect(() async => await iMobileDevice.getInfoForDevice('foo', 'bar'), throwsA(isInstanceOf<IOSDeviceNotFoundError>()));
+    }, overrides: <Type, Generator>{
+      ProcessManager: () => mockProcessManager,
+    });
+
     group('screenshot', () {
       final String outputPath = fs.path.join('some', 'test', 'path', 'image.png');
       MockProcessManager mockProcessManager;