Show Git status indicators on directories

Closes #301

src/packages/tree-view/lib/directory-view.coffee

@@ -26,12 +26,31 @@ class DirectoryView extends View
     if git?
       path = @directory.getPath()
       if parent
-        @directoryName.addClass('ignored') if git.isPathIgnored(path)
-        iconClass = 'submodule-icon' if git.isSubmodule(path)
+        if git.isSubmodule(path)
+          iconClass = 'submodule-icon'
+        else
+          @subscribe git, 'status-changed', (path, status) =>
+            @updateStatus() if path.substring("#{@getPath()}/") is 0
+          @subscribe git, 'statuses-changed', =>
+            @updateStatus()
+          @updateStatus()
       else
         iconClass = 'repository-icon' if path is git.getWorkingDirectory()
+
     @directoryName.addClass(iconClass)
 
+  updateStatus: ->
+    @removeClass('ignored modified new')
+    path = @directory.getPath()
+    if git.isPathIgnored(path)
+      @addClass('ignored')
+    else
+      status = git.getDirectoryStatus(path)
+      if git.isStatusModified(status)
+        @addClass('modified')
+      else if git.isStatusNew(status)
+        @addClass('new')
+
   getPath: ->
     @directory.path
 

src/packages/tree-view/spec/tree-view-spec.coffee

@@ -927,31 +927,48 @@ describe "TreeView", ->
       expect(treeView.find('.file:contains(tree-view.js)').length).toBe 1
 
   describe "Git status decorations", ->
-    [ignoreFile, modifiedFile, originalFileContent] = []
+    [ignoreFile, newFile, modifiedFile, originalFileContent] = []
 
     beforeEach ->
       config.set "core.hideGitIgnoredFiles", false
       ignoreFile = fs.join(require.resolve('fixtures/tree-view'), '.gitignore')
       fs.write(ignoreFile, 'tree-view.js')
       git.getPathStatus(ignoreFile)
-      modifiedFile = fs.join(require.resolve('fixtures/tree-view'), 'tree-view.txt')
+
+      newFile = fs.join(require.resolve('fixtures/tree-view/dir2'), 'new2')
+      fs.write(newFile, '')
+      git.getPathStatus(newFile)
+
+      modifiedFile = fs.join(require.resolve('fixtures/tree-view/dir1'), 'file1')
       originalFileContent = fs.read(modifiedFile)
       fs.write modifiedFile, 'ch ch changes'
       git.getPathStatus(modifiedFile)
+
       treeView.updateRoot()
+      treeView.root.entries.find('.directory:contains(dir1)').view().expand()
+      treeView.root.entries.find('.directory:contains(dir2)').view().expand()
 
     afterEach ->
       fs.remove(ignoreFile) if fs.exists(ignoreFile)
+      fs.remove(newFile) if fs.exists(newFile)
       fs.write modifiedFile, originalFileContent
 
     describe "when a file is modified", ->
       it "adds a custom style", ->
-        expect(treeView.find('.file:contains(tree-view.txt)')).toHaveClass 'modified'
+        expect(treeView.find('.file:contains(file1)')).toHaveClass 'modified'
+
+    describe "when a directory if modified", ->
+      it "adds a custom style", ->
+        expect(treeView.find('.directory:contains(dir1)')).toHaveClass 'modified'
 
     describe "when a file is new", ->
       it "adds a custom style", ->
         expect(treeView.find('.file:contains(.gitignore)')).toHaveClass 'new'
 
+    describe "when a directory is new", ->
+      it "adds a custom style", ->
+        expect(treeView.find('.directory:contains(dir2)')).toHaveClass 'new'
+
     describe "when a file is ignored", ->
       it "adds a custom style", ->
         expect(treeView.find('.file:contains(tree-view.js)')).toHaveClass 'ignored'