Extract method

Rakefile

@@ -337,14 +337,8 @@ task :setup_github_pages, :repo do |t, args|
       end
     end
   end
-  url = if File.exists?('source/CNAME')
-    "http://#{IO.read('source/CNAME').strip}"
-  else
-    "http://#{user}.github.io"
-  end
-  url += "/#{project}" unless project == ''
   jekyll_config = IO.read('_config.yml')
-  jekyll_config.sub!(/^url:.*$/, "url: #{url}")
+  jekyll_config.sub!(/^url:.*$/, "url: #{blog_url(user,project)}")
   File.open('_config.yml', 'w') do |f|
     f.write jekyll_config
   end
@@ -389,6 +383,15 @@ def ask(message, valid_options)
   answer
 end
 
+def blog_url(user, project)
+  url = if File.exists?('source/CNAME')
+    "http://#{IO.read('source/CNAME').strip}"
+  else
+    "http://#{user}.github.io"
+  end
+  url += "/#{project}" unless project == ''
+end
+
 desc "list tasks"
 task :list do
   puts "Tasks: #{(Rake::Task.tasks - [Rake::Task[:list]]).join(', ')}"