Don't do iOS-specific setup when not supported

Summary:
Now flipper will include iOS devices in the dropdown, but you'll also get a message saying they aren't yet supported.
Also doesn't start up the PortForwardingMacApp instances in this case, because it's pointless.

Reviewed By: priteshrnandgaonkar

Differential Revision: D13319990

fbshipit-source-id: 75d72c6ed2478c7b999c5f43b764f097141b33de

src/dispatcher/iOSDevice.js

@@ -9,8 +9,8 @@ import type {ChildProcess} from 'child_process';
 import type {Store} from '../reducers/index.js';
 import type Logger from '../fb-stubs/Logger.js';
 import type {DeviceType} from '../devices/BaseDevice';
-import {RecurringError} from '../utils/errors';
 
+import {RecurringError} from '../utils/errors';
 import {promisify} from 'util';
 import path from 'path';
 import child_process from 'child_process';
@@ -18,6 +18,7 @@ const execFile = child_process.execFile;
 import IOSDevice from '../devices/IOSDevice';
 import iosUtil from '../fb-stubs/iOSContainerUtility';
 import isProduction from '../utils/isProduction.js';
+import GK from '../fb-stubs/GK';
 
 type iOSSimulatorDevice = {|
   state: 'Booted' | 'Shutdown' | 'Shutting Down',
@@ -43,10 +44,9 @@ function forwardPort(port: number, multiplexChannelPort: number) {
   ]);
 }
 // start port forwarding server for real device connections
-const portForwarders: Array<ChildProcess> = [
-  forwardPort(8089, 8079),
-  forwardPort(8088, 8078),
-];
+const portForwarders: Array<ChildProcess> = GK.get('flipper_ios_device_support')
+  ? [forwardPort(8089, 8079), forwardPort(8088, 8078)]
+  : [];
 window.addEventListener('beforeunload', () => {
   portForwarders.forEach(process => process.kill());
 });
@@ -112,12 +112,10 @@ function getActiveSimulators(): Promise<Array<IOSDeviceParams>> {
 }
 
 function getActiveDevices(): Promise<Array<IOSDeviceParams>> {
-  return iosUtil.isAvailable()
-    ? iosUtil.targets().catch(e => {
+  return iosUtil.targets().catch(e => {
     console.error(new RecurringError(e.message));
     return [];
-      })
-    : Promise.resolve([]);
+  });
 }
 
 export default (store: Store, logger: Logger) => {

src/fb-stubs/iOSContainerUtility.js

@@ -4,6 +4,8 @@
  * LICENSE file in the root directory of this source tree.
  * @format
  */
+import {promisify} from 'util';
+const exec = promisify(require('child_process').exec);
 
 const errorMessage = 'Physical iOS devices not yet supported';
 
@@ -18,7 +20,21 @@ function isAvailable(): boolean {
 }
 
 function targets(): Promise<Array<DeviceTarget>> {
-  return Promise.reject(errorMessage);
+  return exec('instruments -s devices').then(({stdout}) =>
+    stdout
+      .toString()
+      .split('\n')
+      .map(line => line.trim())
+      .map(line => /(.+) \([^(]+\) \[(.*)\]( \(Simulator\))?/.exec(line))
+      .filter(Boolean)
+      .filter(
+        ([match, name, udid, isSim]) =>
+          !isSim && (name.includes('iPhone') || name.includes('iPad')),
+      )
+      .map(([match, name, udid]) => {
+        return {udid: udid, type: 'physical', name: name};
+      }),
+  );
 }
 
 function push(

src/reducers/connections.js

@@ -10,6 +10,7 @@ import type Client from '../Client';
 import type {UninitializedClient} from '../UninitializedClient';
 import {isEqual} from 'lodash';
 import {RecurringError} from '../utils/errors';
+import iosUtil from '../fb-stubs/iOSContainerUtility';
 
 export type State = {|
   devices: Array<BaseDevice>,
@@ -153,12 +154,20 @@ export default function reducer(
         selection = {};
       }
 
+      const error =
+        payload.os === 'iOS' &&
+        payload.deviceType === 'physical' &&
+        !iosUtil.isAvailable()
+          ? 'iOS Devices are not yet supported'
+          : null;
+
       return {
         ...state,
         devices,
         // select device if none was selected before
         selectedDevice,
         ...selection,
+        error,
       };
     }
     case 'UNREGISTER_DEVICES': {