Send check-for-update message over ipc

src/browser/atom-application.coffee

@@ -304,6 +304,9 @@ class AtomApplication
     ipcMain.on 'execute-javascript-in-dev-tools', (event, code) ->
       event.sender.devToolsWebContents?.executeJavaScript(code)
 
+    ipcMain.on 'check-for-update', =>
+      @autoUpdateManager.check()
+
   setupDockMenu: ->
     if process.platform is 'darwin'
       dockMenu = Menu.buildFromTemplate [

src/browser/auto-update-manager.coffee

@@ -3,6 +3,7 @@ _ = require 'underscore-plus'
 Config = require '../config'
 {EventEmitter} = require 'events'
 path = require 'path'
+ipc = require 'ipc'
 
 IdleState = 'idle'
 CheckingState = 'checking'
@@ -47,7 +48,7 @@ class AutoUpdateManager
 
     autoUpdater.on 'update-available', =>
       @setState(DownladingState)
-      # We use sendMessage to send an event called 'update-available' below
+      # We use sendMessage to send an event called 'update-available' in 'update-downloaded'
       # once the update download is complete. This mismatch between the electron
       # autoUpdater events is unfortunate but in the interest of not changing the
       # one existing event handled by applicationDelegate

src/update.js

@@ -1,6 +1,7 @@
 'use babel'
 
 import {Emitter, CompositeDisposable} from 'event-kit'
+import ipc from 'ipc'
 
 export default class Update {
   constructor () {
@@ -55,10 +56,6 @@ export default class Update {
   }
 
   check () {
-    // TODO
-  }
-
-  getState () {
-    // TODO
+    ipc.send('check-for-update')
   }
 }