# File lib/rails/generators/haml/application_layout/application_layout_generator.rb, line 14
      def convert
        app_layout_from = ::Rails.root.join(HTML_LAYOUT_PATH).to_s
        app_layout_to   = ::Rails.root.join(HAML_LAYOUT_PATH).to_s

        if File.exist?(app_layout_from)

          if !File.exist?(app_layout_to)
            `html2haml #{app_layout_from.shellescape} #{app_layout_to.shellescape}`
            puts "Success! app/views/layouts/application.html.haml is created.\n" \
                 "Please remove the erb file: app/views/layouts/application.html.erb"
          else
            puts "Error! There is a file named app/views/layouts/application.html.haml already."
          end
        else
          puts "Error! There is no file named app/views/layouts/application.html.erb."
        end

      end