update.js

import { app, BrowserWindow } from 'electron'

import { autoUpdater } from "electron-updater"
import log from "electron-log"

autoUpdater.logger = log;
autoUpdater.logger.transports.file.level = "info";
log.info("App starting...");

/**
 * Set `__static` path to static files in production
 * https://simulatedgreg.gitbooks.io/electron-vue/content/en/using-static-assets.html
 */
if (process.env.NODE_ENV !== 'development') {
  global.__static = require('path').join(__dirname, '/static').replace(/\\/g, '\\\\')
}

let mainWindow
const winURL = process.env.NODE_ENV === 'development'
  ? `http://localhost:9080`
  : `file://${__dirname}/index.html`

function createWindow() {
  /**
   * Initial window options
   */
  mainWindow = new BrowserWindow({
    height: 563,
    useContentSize: true,
    width: 1000
  })

  mainWindow.loadURL(winURL)

  mainWindow.on('closed', () => {
    mainWindow = null
  })

  autoUpdater.setFeedURL("http://localhost:8080");
  autoUpdater.checkForUpdatesAndNotify();
}

app.on('ready', createWindow)

app.on('window-all-closed', () => {
  if (process.platform !== 'darwin') {
    app.quit()
  }
})

app.on('activate', () => {
  if (mainWindow === null) {
    createWindow()
  }
})

function sendStatusToWindow(text) {
  log.info(text);
  win.webContents.send("message", text);
}

autoUpdater.on("checking-for-update", () => {
  sendStatusToWindow("Checking for update...");
});
autoUpdater.on("update-available", info => {
  sendStatusToWindow("Update available.");
});
autoUpdater.on("update-not-available", info => {
  sendStatusToWindow("Update not available.");
});
autoUpdater.on("error", err => {
  sendStatusToWindow("Error in auto-updater. " + err);
});
autoUpdater.on("download-progress", progressObj => {
  let log_message = "Download speed: " + progressObj.bytesPerSecond;
  log_message = log_message + " - Downloaded " + progressObj.percent + "%";
  log_message =
    log_message +
    " (" +
    progressObj.transferred +
    "/" +
    progressObj.total +
    ")";
  sendStatusToWindow(log_message);
});
autoUpdater.on("update-downloaded", info => {
  sendStatusToWindow("Update downloaded");
});


/**
 * Auto Updater
 *
 * Uncomment the following code below and install `electron-updater` to
 * support auto updating. Code Signing with a valid certificate is required.
 * https://simulatedgreg.gitbooks.io/electron-vue/content/en/using-electron-builder.html#auto-updating
 */

/*
import { autoUpdater } from 'electron-updater'

autoUpdater.on('update-downloaded', () => {
  autoUpdater.quitAndInstall()
})

app.on('ready', () => {
  if (process.env.NODE_ENV === 'production') autoUpdater.checkForUpdates()
})
 */