Pass project to Git.open in the options hash

Previously the project global was unavailable in the Git constructor
since it had not been set as a global yet and so the Git instance was never
configured to watch the project's buffers for save/reload events.  This caused
the status to be out of sync in places like the gutter and status bar.

spec/git-spec.coffee

@@ -204,3 +204,39 @@ describe "Git", ->
         expect(statuses[cleanPath]).toBeUndefined()
         expect(repo.isStatusNew(statuses[newPath])).toBeTruthy()
         expect(repo.isStatusModified(statuses[modifiedPath])).toBeTruthy()
+
+  describe "when a buffer is changed and then saved", ->
+    [originalContent, editSession] = []
+
+    afterEach ->
+      fsUtils.writeSync(editSession.getPath(), originalContent)
+
+    it "emits a status-changed event", ->
+      editSession = project.open('sample.js')
+      originalContent = editSession.getText()
+      editSession.insertNewline()
+
+      statusHandler = jasmine.createSpy('statusHandler')
+      project.getRepo().on 'status-changed', statusHandler
+      editSession.save()
+      expect(statusHandler.callCount).toBe 1
+      expect(statusHandler).toHaveBeenCalledWith editSession.getPath(), 256
+
+  describe "when a buffer is reloaded and has been changed", ->
+    [originalContent, editSession] = []
+
+    afterEach ->
+      fsUtils.writeSync(editSession.getPath(), originalContent)
+
+    it "emits a status-changed event", ->
+      editSession = project.open('sample.js')
+      originalContent = editSession.getText()
+      fsUtils.writeSync(editSession.getPath(), 'changed')
+
+      statusHandler = jasmine.createSpy('statusHandler')
+      project.getRepo().on 'status-changed', statusHandler
+      editSession.getBuffer().reload()
+      expect(statusHandler.callCount).toBe 1
+      expect(statusHandler).toHaveBeenCalledWith editSession.getPath(), 256
+      editSession.getBuffer().reload()
+      expect(statusHandler.callCount).toBe 1

src/git.coffee

@@ -52,6 +52,8 @@ class Git
   # * options:
   #    + refreshOnWindowFocus: If `true`, {#refreshIndex} and {#refreshStatus}
   #      are called on focus
+  #    + project: A project that supplies buffers that will be monitored for
+  #      save and reload events to trigger status refreshes.
   constructor: (path, options={}) ->
     @repo = GitUtils.open(path)
     unless @repo?
@@ -59,20 +61,25 @@ class Git
 
     @statuses = {}
     @upstream = {ahead: 0, behind: 0}
+    {project, refreshOnWindowFocus} = options
 
-    refreshOnWindowFocus = options.refreshOnWindowFocus ? true
+    refreshOnWindowFocus ?= true
     if refreshOnWindowFocus
       $ = require 'jquery'
       @subscribe $(window), 'focus', =>
         @refreshIndex()
         @refreshStatus()
 
-    project?.eachBuffer this, (buffer) =>
-      bufferStatusHandler = =>
-        path = buffer.getPath()
-        @getPathStatus(path) if path
-      @subscribe buffer, 'saved', bufferStatusHandler
-      @subscribe buffer, 'reloaded', bufferStatusHandler
+    if project?
+      @subscribeToBuffer(buffer) for buffer in project.getBuffers()
+      @subscribe project, 'buffer-created', (buffer) => @subscribeToBuffer(buffer)
+
+  subscribeToBuffer: (buffer) ->
+    bufferStatusHandler = =>
+      if path = buffer.getPath()
+        @getPathStatus(path)
+    @subscribe buffer, 'saved', bufferStatusHandler
+    @subscribe buffer, 'reloaded', bufferStatusHandler
 
   # Private:
   destroy: ->

src/project.coffee

@@ -121,7 +121,7 @@ class Project
     if projectPath?
       directory = if fsUtils.isDirectorySync(projectPath) then projectPath else path.dirname(projectPath)
       @rootDirectory = new Directory(directory)
-      @repo = Git.open(projectPath)
+      @repo = Git.open(projectPath, project: this)
     else
       @rootDirectory = null