New Feature: Diff patch file export for commit

app/controllers/commits_controller.rb

@@ -64,4 +64,15 @@ class CommitsController < ApplicationController
       @commit = Commit.new(older)
     end
   end
+
+  def patch
+    @commit = project.commit(params[:id])
+    
+    send_data(
+      @commit.to_patch,
+      :type => "text/plain",
+      :disposition => 'attachment',
+      :filename => (@commit.id.to_s + ".patch")
+    )
+  end
 end

app/models/commit.rb

@@ -19,6 +19,7 @@ class Commit
     :diffs,
     :tree,
     :id,
+    :to_patch,
     :to => :commit

app/views/commits/_commit_box.html.haml

 .commit-box{class: @commit.parents.count > 1 ? "merge-commit" : ""}
   .commit-head
-    = link_to "Browse Code »", tree_project_ref_path(@project, @commit.id), :class => "browse-button"
+    .right
+      = link_to tree_project_ref_path(@project, @commit.id), :class => "browse-button primary" do 
+        %strong Browse Code »
+      - if @notes_count > 0
+        %span.btn.disabled
+          %i.icon-comment
+          = @notes_count
+          
+      = link_to patch_project_commit_path(@project, @commit.id), :class => "btn small" do 
+        %i.icon-download-alt
+        Get Patch  
+        
     %h3.commit-title
       = commit_msg_with_link_to_issues(@project, @commit.title)
     - if @commit.description.present?

config/routes.rb

@@ -154,6 +154,10 @@ Gitlab::Application.routes.draw do
       collection do 
         get :compare
       end
+
+      member do 
+        get :patch
+      end
     end
     resources :team_members
     resources :milestones