fix: don't throw MaxListenersExceeded error when more than 11 proccesses are started from sidekick

Author: Fatme

Diff for: lib/before-watch.js

@@ -1,22 +1,27 @@
 const { getWebpackProcesses, runWebpackCompiler, stopWebpackCompiler } = require("./compiler");
+let isAttachedOnEvents = false;
 
 module.exports = function ($logger, $liveSyncService, $devicesService, hookArgs) {
     if (hookArgs.config) {
         const appFilesUpdaterOptions = hookArgs.config.appFilesUpdaterOptions;
         if (appFilesUpdaterOptions.bundle) {
-            $liveSyncService.on("liveSyncStopped", data => {
-                const webpackProcesses = getWebpackProcesses();
-                Object.keys(webpackProcesses).forEach(platform => {
-                    const devices = $devicesService.getDevicesForPlatform(platform);
-                    if (!devices || !devices.length) {
-                        stopWebpackCompiler(platform);
-                    }
+            if (!isAttachedOnEvents) {
+                $liveSyncService.on("liveSyncStopped", data => {
+                    const webpackProcesses = getWebpackProcesses();
+                    Object.keys(webpackProcesses).forEach(platform => {
+                        const devices = $devicesService.getDevicesForPlatform(platform);
+                        if (!devices || !devices.length) {
+                            stopWebpackCompiler(platform);
+                        }
+                    });
                 });
-            });
 
-            process.on("exit", () => {
-                stopWebpackCompiler();
-            });
+                process.on("exit", () => {
+                    stopWebpackCompiler();
+                });
+
+                isAttachedOnEvents = true;
+            }
 
             const platforms = hookArgs.config.platforms;
             return Promise.all(platforms.map(platform => {