add back auto updater. closes #476

index.js

@@ -2,6 +2,7 @@
 
 const { app, BrowserWindow, shell, Menu } = require('electron')
 const { neutral } = require('dat-colors')
+const autoUpdater = require('./lib/auto-updater')
 const defaultMenu = require('electron-default-menu')
 const doctor = require('dat-doctor')
 const { Writable } = require('stream')
@@ -35,6 +36,11 @@ app.on('ready', () => {
   win.loadURL(`file://${__dirname}/index.html`)
   win.webContents.openDevTools()
   Menu.setApplicationMenu(Menu.buildFromTemplate(menu))
+
+  if (process.env.NODE_ENV === 'production') {
+    const log = str => win && win.webContents.send('log', str)
+    autoUpdater({ log })
+  }
 })
 
 app.on('window-all-closed', () => app.quit())

lib/auto-updater.js

@@ -0,0 +1,36 @@
+const os = require('os')
+const { app, dialog, autoUpdater } = require('electron')
+const ms = require('ms')
+
+module.exports = ({ log }) => {
+  const onerror = err => err && log(err.stack)
+
+  const platform = `${os.platform()}_${os.arch()}`
+  const version = app.getVersion()
+
+  autoUpdater.setFeedURL(`http://dat.land:6000/update/${platform}/${version}`)
+  autoUpdater.on('error', onerror)
+  autoUpdater.on('checking-for-update', () => log('checking for update'))
+  autoUpdater.on('update-available', () => log('update available, downloading…'))
+  autoUpdater.on('update-not-available', () => log('update not available'))
+  autoUpdater.on('download-progress', p => log('download progress ' + p.percent))
+  autoUpdater.once('update-downloaded', (ev, notes, version) => {
+    log('update downloaded')
+
+    dialog.showMessageBox({
+      type: 'question',
+      buttons: ['Install and Relaunch', 'Dismiss'],
+      defaultId: 0,
+      title: 'A new version of Dat Desktop is ready to install!',
+      message: `Dat Desktop ${version} has been downloaded and is ready to use! Would you like to install it and relaunch Dat Desktop now?`
+    }, res => {
+      const update = res === 0
+      if (!update) return log('dismiss')
+      log('updating…')
+      autoUpdater.quitAndInstall()
+    })
+  })
+
+  setTimeout(() => autoUpdater.checkForUpdates(), ms('10s'))
+  setInterval(() => autoUpdater.checkForUpdates(), ms('30m'))
+}