From 2a9983b1efde27242775229a3d4fbb6bdc6ec2ec Mon Sep 17 00:00:00 2001
From: Lawrence Lomax <lawrencelomax@fb.com>
Date: Thu, 10 Feb 2022 07:56:49 -0800
Subject: [PATCH] Use Promise.all for checking xcode-select and apps in
 parallel

Summary: These can be batched together rather nicely

Reviewed By: lblasa

Differential Revision: D34139753

fbshipit-source-id: 7388630dcae34d40308d54f18a37215cf18e5904
---
 .../src/devices/ios/iOSDeviceManager.tsx              | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/desktop/flipper-server-core/src/devices/ios/iOSDeviceManager.tsx b/desktop/flipper-server-core/src/devices/ios/iOSDeviceManager.tsx
index 10f1d844a..a419d6808 100644
--- a/desktop/flipper-server-core/src/devices/ios/iOSDeviceManager.tsx
+++ b/desktop/flipper-server-core/src/devices/ios/iOSDeviceManager.tsx
@@ -192,11 +192,14 @@ export class IOSDeviceManager {
 
   async checkXcodeVersionMismatch() {
     try {
-      const {stdout: xcodeSelectStdout} = await exec('xcode-select -p');
+      const [{stdout: xcodeSelectStdout}, {stdout: simulatorProcessStdout}] =
+        await Promise.all([
+          exec('xcode-select -p'),
+          exec(
+            "pgrep Simulator | xargs ps -o command | grep -v grep | grep Simulator.app | awk '{print $1}'",
+          ),
+        ]);
       const xcodeCLIVersion = xcodeSelectStdout!.toString().trim();
-      const {stdout: simulatorProcessStdout} = await exec(
-        "pgrep Simulator | xargs ps -o command | grep -v grep | grep Simulator.app | awk '{print $1}'",
-      );
       const runningSimulatorApplications = simulatorProcessStdout!
         .toString()
         .split('\n')