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