Add generate action to labels controller which allow creation of default labels set for project

app/controllers/labels_controller.rb

@@ -10,6 +10,12 @@ class LabelsController < ProjectResourceController
     @labels = @project.issues_labels.order('count DESC')
   end
+  def generate
+    Gitlab::Labels.generate(@project)
+
+    redirect_to project_labels_path(@project)
+  end
+
   protected
   def module_enabled

app/views/labels/index.html.haml

@@ -3,12 +3,13 @@
 %h3.page_title
   Labels
 %br
-%div.ui-box
-  %ul.well-list.labels-table
+
+.light-well
+  %ul.bordered-list.labels-table
     - @labels.each do |label|
       = render 'label', label: label
     - unless @labels.present?
       %li
-        %h3.nothing_here_message Nothing to show here
+        %h3.nothing_here_message Add first label to your issues or #{link_to 'generate', generate_project_labels_path(@project), method: :post} default set of labels

config/routes.rb

@@ -269,7 +269,13 @@ Gitlab::Application.routes.draw do
     resources :team, controller: 'team_members', only: [:index]
     resources :milestones, except: [:destroy]
-    resources :labels, only: [:index]
+
+    resources :labels, only: [:index] do
+      collection do
+        post :generate
+      end
+    end
+
     resources :issues, except: [:destroy] do
       collection do
         post  :bulk_update