# File lib/coffee_script.rb, line 46
      def execute(command)
        out = `#{command}`.chomp
        if $?.success?
          status, result = out[0, 1], out[1..-1]
          if status == "+"
            result
          else
            raise CompilationError, result[/^(?:Error: )?(.*)/, 1]
          end
        else
          raise EngineError, out
        end
      end