-Add update mechanism via electron-updater

-Add environment constants
-Don't pop open dev tools in about window if we're in prod build

Author: chrisknepper

src/background.js

@@ -6,6 +6,7 @@
 import path from "path";
 import url from "url";
 import { app, Menu } from "electron";
+import { autoUpdater } from 'electron-updater';
 import { appMenuTemplate } from './menu/app_menu_template';
 import { devMenuTemplate } from "./menu/dev_menu_template";
 import { editMenuTemplate } from "./menu/edit_menu_template";
@@ -35,6 +36,7 @@ if (env.name !== "production") {
 
 app.on("ready", () => {
   setApplicationMenu();
+  autoUpdater.checkForUpdatesAndNotify();
 
   const mainWindow = createWindow("main", {
     width: 1100,

src/constants/index.js

@@ -1,13 +1,26 @@
+import env from 'env';
+
 const osMap = {
-    win32: "Windows",
-    darwin: "macOS",
-    linux: "Linux"
+    win32: 'Windows',
+    darwin: 'macOS',
+    linux: 'Linux'
 };
 
+// Operating system
 const osName = process.platform;
 const osNameFriendly = osMap[osName];
-const IS_WINDOWS = osName === 'win32';
-const IS_MAC = osName === 'darwin';
-const IS_LINUX = osName === 'linux';
+const IS_WINDOWS = (osName === 'win32');
+const IS_MAC = (osName === 'darwin');
+const IS_LINUX = (osName === 'linux');
+
+// Environment
+const IS_DEV = (env.name === 'development');
 
-export { osName, osNameFriendly, IS_WINDOWS, IS_MAC, IS_LINUX };
+export {
+    osName,
+    osNameFriendly,
+    IS_WINDOWS,
+    IS_MAC,
+    IS_LINUX,
+    IS_DEV
+};

src/menu/items/about.js

@@ -1,11 +1,12 @@
 import appIcon from '../../../resources/icons/512x512.png';
+import { IS_DEV } from '../../constants';
 import openAboutWindow from 'about-window';
 
 export const aboutMenu = () => {
     openAboutWindow({
         icon_path: appIcon,
         copyright: 'Copyright © 2018 Chris Knepper, All rights reserved.',
         product_name: 'Android Messages Desktop',
-        open_devtools: true
+        open_devtools: IS_DEV
     });
 };