Add option to cold boot emulators

Summary: This is useful when your emulator freezes.

Reviewed By: mweststrate

Differential Revision: D25998579

fbshipit-source-id: 236c16c3008f0e33d62e4c486b5a04383b1a59ba

desktop/app/src/devices/AndroidDevice.tsx

@@ -202,16 +202,20 @@ export default class AndroidDevice extends BaseDevice {
   }
 }
 
-export async function launchEmulator(name: string) {
+export async function launchEmulator(name: string, coldBoot: boolean = false) {
   // On Linux, you must run the emulator from the directory it's in because
   // reasons ...
   return which('emulator')
     .then((emulatorPath) => {
       if (emulatorPath) {
-        const child = spawn(emulatorPath, [`@${name}`], {
+        const child = spawn(
+          emulatorPath,
+          [`@${name}`, ...(coldBoot ? ['-no-snapshot-load'] : [])],
+          {
             detached: true,
             cwd: dirname(emulatorPath),
-        });
+          },
+        );
         child.stderr.on('data', (data) => {
           console.error(`Android emulator error: ${data}`);
         });

desktop/app/src/sandy-chrome/appinspect/LaunchEmulator.tsx

@@ -8,8 +8,13 @@
  */
 
 import React, {useEffect, useState} from 'react';
-import {Modal, Button, message, Alert} from 'antd';
-import {AndroidOutlined, AppleOutlined} from '@ant-design/icons';
+import {Modal, Button, message, Alert, Menu, Dropdown} from 'antd';
+import {
+  AppleOutlined,
+  PoweroffOutlined,
+  MoreOutlined,
+  AndroidOutlined,
+} from '@ant-design/icons';
 import {Store} from '../../reducers';
 import {useStore} from '../../utils/useStore';
 import {launchEmulator} from '../../devices/AndroidDevice';
@@ -23,6 +28,8 @@ import {
 import GK from '../../fb-stubs/GK';
 import {JSEmulatorLauncherSheetSandy} from '../../chrome/JSEmulatorLauncherSheet';
 
+const COLD_BOOT = 'cold-boot';
+
 export function showEmulatorLauncher(store: Store) {
   renderReactRoot((unmount) => (
     <Provider store={store}>
@@ -65,25 +72,45 @@ export const LaunchEmulatorDialog = withTrackingScope(
     }, [iosEnabled, getSimulators]);
 
     const items = [
-      ...androidEmulators.map((name) => (
-        <Button
-          key={name}
-          icon={<AndroidOutlined />}
-          onClick={() =>
-            launchEmulator(name)
+      ...(androidEmulators.length > 0 ? [<AndroidOutlined />] : []),
+      ...androidEmulators.map((name) => {
+        const launch = (coldBoot: boolean) => {
+          launchEmulator(name, coldBoot)
             .catch((e) => {
               console.error(e);
               message.error('Failed to start emulator: ' + e);
             })
-              .then(onClose)
-          }>
+            .then(onClose);
+        };
+        const menu = (
+          <Menu
+            onClick={({key}) => {
+              switch (key) {
+                case COLD_BOOT: {
+                  launch(true);
+                  break;
+                }
+              }
+            }}>
+            <Menu.Item key={COLD_BOOT} icon={<PoweroffOutlined />}>
+              Cold Boot
+            </Menu.Item>
+          </Menu>
+        );
+        return (
+          <Dropdown.Button
+            key={name}
+            overlay={menu}
+            icon={<MoreOutlined />}
+            onClick={() => launch(false)}>
             {name}
-        </Button>
-      )),
+          </Dropdown.Button>
+        );
+      }),
+      ...(iosEmulators.length > 0 ? [<AppleOutlined />] : []),
       ...iosEmulators.map((device) => (
         <Button
           key={device.udid}
-          icon={<AppleOutlined />}
           onClick={() =>
             launchSimulator(device.udid)
               .catch((e) => {

desktop/app/src/sandy-chrome/appinspect/__tests__/LaunchEmulator.spec.tsx

@@ -66,5 +66,5 @@ test('Can render and launch android apps', async () => {
   fireEvent.click(renderer.getByText('emulator2'));
   await sleep(1000);
   expect(onClose).toBeCalled();
-  expect(launchEmulator).toBeCalledWith('emulator2');
+  expect(launchEmulator).toBeCalledWith('emulator2', false);
 });