add tags autocomplete

app/controllers/tags_controller.rb

+class TagsController < ApplicationController
+	def index
+	end
+
+	def autocomplete
+		tags = Project.tag_counts.limit 8
+		tags = tags.where('name like ?', "%#{params[:term]}%") unless params[:term].blank?
+		tags = tags.map {|t| t.name}
+
+		respond_to do |format|
+			format.json { render json: tags}
+		end
+	end
+
+end

app/views/projects/_form.html.haml

@@ -57,9 +57,19 @@
   $(function(){
     var tag_field = $('#tag_field').tagify();
 
+
+    tag_field.tagify('inputField').autocomplete({
+        source: '/tags/autocomplete.json',
+        position: { of: tag_field.tagify('containerDiv') },
+        close: function(event, ui) { tag_field.tagify('add'); },
+    });
+
+
     $('form').submit( function() {
       var tag_field = $('#tag_field')
          tag_field.val( tag_field.tagify('serialize') );
          return true;
     });
+
+
   })  

app/views/tags/autocomplete.html.haml

+%h1 Tags#autocomplete
+%p Find me in app/views/tags/autocomplete.html.haml
\ No newline at end of file

app/views/tags/index.html.haml

+%h1 Tags#index
+%p Find me in app/views/tags/index.html.haml
\ No newline at end of file

config/routes.rb

 Gitlab::Application.routes.draw do
+  get "tags/index"
+  get "tags/autocomplete"
+
   namespace :admin do
     resources :users
     resources :projects

spec/requests/tags_spec.rb

+require 'spec_helper'
+
+describe "Tags" do
+  before { login_as :user }
+
+  # describe "GET 'tags/index'" do
+  #   it "should be successful" do
+  #     get 'tags/index'
+  #     response.should be_success
+  #   end
+  # end
+
+
+  describe "GET '/tags/autocomplete'" do
+    before do
+     @project = Factory :project
+     @project.add_access(@user, :read)
+     @project.tag_list = 'demo1'
+     @project.save
+     visit '/tags/autocomplete.json'
+    end
+
+
+    it "should contains tags" do
+      page.should have_content('demo1')
+    end
+end
+
+
+
+end