require 'singleton'

module Specinfra::Backend
  class ShellScript < Base
    def initialize(config = {})
      super

      @lines = [ "#!/bin/sh", "" ]
      ObjectSpace.define_finalizer(self, Writer.new(@lines))
    end

    def run_command(cmd, opts={})
      @lines << cmd
      CommandResult.new
    end

    class Writer
      def initialize(lines)
        @lines = lines
      end

      def call(*args)
        puts @lines
      end
    end
  end
end