    # File lib/compass/app_integration/rails/installer.rb, line 20
            def write_configuration_files(config_file = nil)
              config_file ||= targetize('config/compass.rb')
              unless File.exists?(config_file)
                directory File.dirname(config_file)
                write_file config_file, config_contents
              end
              unless rails3?
                directory File.dirname(targetize('config/initializers/compass.rb'))
                write_file targetize('config/initializers/compass.rb'), initializer_contents
              end
            end