implement barebones auto updater

main/auto-updater.js

@@ -0,0 +1,41 @@
+module.exports = {
+  init
+}
+
+var electron = require('electron')
+
+var config = require('../config')
+
+// var app = electron.app
+var autoUpdater = electron.autoUpdater
+
+function init () {
+  autoUpdater.on('error', function (err) {
+    console.error('error downloading app update', err.message || err)
+  })
+
+  autoUpdater.setFeedURL(config.AUTO_UPDATE_URL)
+
+  // TODO: remove
+  autoUpdater.checkForUpdates()
+
+  /*
+   * We always check for updates on app startup. To keep app startup fast, we delay this
+   * first check so it happens when there is less going on.
+   */
+  setTimeout(() => autoUpdater.checkForUpdates(), config.AUTO_UPDATE_CHECK_STARTUP_DELAY)
+
+  /*
+   * After the first check for updates, we continually check for updates on a regular
+   * interval. This is to ensure that checks happen even when the app is left open for a
+   * long time.
+   */
+  setInterval(() => autoUpdater.checkForUpdates(), config.AUTO_UPDATE_CHECK_INTERVAL)
+
+  autoUpdater.on('checking-for-update', () => console.log('checking for app update'))
+  autoUpdater.on('update-available', () => console.log('app update available'))
+  autoUpdater.on('update-not-available', () => console.log('app update not available'))
+  autoUpdater.on('update-downloaded', function (e) {
+    console.log('app update downloaded', e)
+  })
+}