Enable screenshot for physical devices

Summary: Uses idb to get screenshot for physical devices.

Reviewed By: jknoxville

Differential Revision: D24017656

fbshipit-source-id: 89ffd17259d6f94d03a1442ffb341b79797f260b

desktop/app/src/devices/IOSDevice.tsx

@@ -56,7 +56,10 @@ export default class IOSDevice extends BaseDevice {
     const tmpImageName = uuid() + '.png';
     const tmpDirectory = (electron.app || electron.remote.app).getPath('temp');
     const tmpFilePath = path.join(tmpDirectory, tmpImageName);
-    const command = `xcrun simctl io booted screenshot ${tmpFilePath}`;
+    const command =
+      this.deviceType === 'emulator'
+        ? `xcrun simctl io booted screenshot ${tmpFilePath}`
+        : `idb screenshot --udid ${this.serial} ${tmpFilePath}`;
     return promisify(exec)(command)
       .then(() => promisify(fs.readFile)(tmpFilePath))
       .then((buffer) => {

desktop/app/src/init.tsx

@@ -73,6 +73,7 @@ const AppFrame = () => (
 function setProcessState(store: Store) {
   const settings = store.getState().settingsState;
   const androidHome = settings.androidHome;
+  const idbPath = settings.idbPath;
 
   if (!process.env.ANDROID_HOME) {
     process.env.ANDROID_HOME = androidHome;
@@ -83,7 +84,9 @@ function setProcessState(store: Store) {
   process.env.PATH =
     ['emulator', 'tools', 'platform-tools']
       .map((directory) => path.resolve(androidHome, directory))
-      .join(':') + `:${process.env.PATH}`;
+      .join(':') +
+    `:${idbPath}` +
+    `:${process.env.PATH}`;
 
   window.requestIdleCallback(() => {
     setupPrefetcher(settings);