add --port options to run-android, defaults to 8081

Summary: Closes #15316

Differential Revision: D5582599

Pulled By: javache

fbshipit-source-id: 575e0540965792a25e6cc572cff103da2c65a262

Author: Chris Trinh

local-cli/runAndroid/runAndroid.js

@@ -66,10 +66,10 @@ function getAdbPath() {
 }
 
 // Runs ADB reverse tcp:8081 tcp:8081 to allow loading the jsbundle from the packager
-function tryRunAdbReverse(device) {
+function tryRunAdbReverse(packagerPort, device) {
   try {
     const adbPath = getAdbPath();
-    const adbArgs = ['reverse', 'tcp:8081', 'tcp:8081'];
+    const adbArgs = ['reverse', `tcp:${packagerPort}`, `tcp:${packagerPort}`];
 
     // If a device is specified then tell adb to use it
     if (device) {
@@ -177,7 +177,7 @@ function tryLaunchAppOnDevice(device, packageNameWithSuffix, packageName, adbPat
 }
 
 function installAndLaunchOnDevice(args, selectedDevice, packageNameWithSuffix, packageName, adbPath) {
-  tryRunAdbReverse(selectedDevice);
+  tryRunAdbReverse(args.port, selectedDevice);
   tryInstallAppOnDevice(args, selectedDevice);
   tryLaunchAppOnDevice(selectedDevice, packageNameWithSuffix, packageName, adbPath, args.mainActivity);
 }
@@ -226,7 +226,7 @@ function runOnAllDevices(args, cmd, packageNameWithSuffix, packageName, adbPath)
     const devices = adb.getDevices();
     if (devices && devices.length > 0) {
       devices.forEach((device) => {
-        tryRunAdbReverse(device);
+        tryRunAdbReverse(args.port, device);
         tryLaunchAppOnDevice(device, packageNameWithSuffix, packageName, adbPath, args.mainActivity);
       });
     } else {
@@ -317,5 +317,9 @@ module.exports = {
   }, {
     command: '--no-packager',
     description: 'Do not launch packager while building',
+  }, {
+    command: '--port [number]',
+    default: 8081,
+    parse: (val: string) => Number(val),
   }],
 };