# File lib/chef/knife/environment_from_file.rb, line 66
      def run
        if config[:all] == true
          load_all_environments
        else
          if @name_args[0].nil?
            show_usage
            ui.fatal("You must specify a file to load")
            exit 1
          end
  
          @name_args.each do |arg|
            load_environment(arg)
          end
        end
      end