implement auto update

main.js

@@ -6,11 +6,17 @@ const app = electron.app;
 // Module to create native browser window.
 const BrowserWindow = electron.BrowserWindow;
 
+const autoUpdater = require('auto-updater');
+const appVersion = require('./package.json').version;
+const os = require('os').platform();
+const dialog = require('electron').dialog;
+
+
 // Keep a global reference of the window object, if you don't, the window will
 // be closed automatically when the JavaScript object is garbage collected.
 let mainWindow;
 
-function createWindow () {
+function createWindow() {
     // Create the browser window.
     mainWindow = new BrowserWindow({width: 800, height: 600});
 
@@ -21,7 +27,7 @@ function createWindow () {
     mainWindow.webContents.openDevTools();
 
     // Emitted when the window is closed.
-    mainWindow.on('closed', function() {
+    mainWindow.on('closed', function () {
         // Dereference the window object, usually you would store windows
         // in an array if your app supports multi windows, this is the time
         // when you should delete the corresponding element.
@@ -31,7 +37,12 @@ function createWindow () {
 
 // This method will be called when Electron has finished
 // initialization and is ready to create browser windows.
-app.on('ready', createWindow);
+app.on('ready', function () {
+    createWindow();
+    autoUpdater.setFeedURL('http://localhost:3000/release');
+    autoUpdater.checkForUpdates();
+
+});
 
 // Quit when all windows are closed.
 app.on('window-all-closed', function () {
@@ -48,4 +59,22 @@ app.on('activate', function () {
     if (mainWindow === null) {
         createWindow();
     }
-});
+});
+
+autoUpdater.on('update-downloaded', notifyUserAboutUpdate);
+
+function notifyUserAboutUpdate() {
+    let buttons = ['Sure, get me a new version!', 'Nah, I\'m good, I can wait.'];
+    let options = {
+        type: 'question',
+        message: 'Hey, new version of app is downloaded! Do you want to restart it now and get the newest version?',
+        cancelId: -1,
+        buttons
+    };
+
+    dialog.showMessageBox(options, function (response) {
+        if (response == 0) {
+            autoUpdater.quitAndInstall();
+        }
+    });
+}