Use atom.notifications when there is a config file error

spec/config-spec.coffee

@@ -554,11 +554,13 @@ describe "Config", ->
     describe "when the config file contains invalid cson", ->
       beforeEach ->
         spyOn(console, 'error')
+        spyOn(atom.notifications, 'addError')
         fs.writeFileSync(atom.config.configFilePath, "{{{{{")
 
       it "logs an error to the console and does not overwrite the config file on a subsequent save", ->
         atom.config.loadUserConfig()
         expect(console.error).toHaveBeenCalled()
+        expect(atom.notifications.addError.callCount).toBe 1
         atom.config.set("hair", "blonde") # trigger a save
         expect(atom.config.save).not.toHaveBeenCalled()
 
@@ -692,7 +694,6 @@ describe "Config", ->
             expect(atom.config.get(['.source.ruby'], 'foo.bar')).toBe 'baz'
             expect(atom.config.get(['.source.ruby'], 'foo.scoped')).toBe true
 
-
     describe "when the config file changes to omit a setting with a default", ->
       it "resets the setting back to the default", ->
         fs.writeFileSync(atom.config.configFilePath, "foo: { baz: 'new'}")

src/config.coffee

@@ -724,21 +724,26 @@ class Config
       @configFileHasErrors = false
     catch error
       @configFileHasErrors = true
-      console.error "Failed to load user config '#{@configFilePath}'", error.message
-      console.error error.stack
+      @notifyFailure('Failed to load user config', error)
 
   observeUserConfig: ->
     try
       @watchSubscription ?= pathWatcher.watch @configFilePath, (eventType) =>
         @loadUserConfig() if eventType is 'change' and @watchSubscription?
     catch error
-      console.error "Failed to watch user config '#{@configFilePath}'", error.message
-      console.error error.stack
+      @notifyFailure('Failed to watch user config', error)
 
   unobserveUserConfig: ->
     @watchSubscription?.close()
     @watchSubscription = null
 
+  notifyFailure: (errorMessage, error) ->
+    message = "#{errorMessage}"
+    detail = error.stack
+    atom.notifications.addError(message, {detail, closable: true})
+    console.error message
+    console.error detail
+
   save: ->
     allSettings = global: @settings
     allSettings = _.extend allSettings, @scopedSettingsStore.propertiesForSource('user-config')