# File lib/chef/knife/environment_from_file.rb, line 35
      def run
        if @name_args[0].nil?
          show_usage
          ui.fatal("You must specify a file to load")
          exit 1
        end


        updated = loader.load_from("environments", @name_args[0])
        updated.save
        output(format_for_display(updated)) if config[:print_after]
        ui.info("Updated Environment #{updated.name}")
      end