def wait(*args)
      pattern = args.pop
      unless pattern
        raise ArgumentError, 'Please provide condition to wait for'
      end

      run(*args) do |out, _|
        raise if out =~ /#{pattern}/
      end
    rescue ExitError
      # noop
    end
def wait(*args)
      pattern = args.pop
      unless pattern
        raise ArgumentError, 'Please provide condition to wait for'
      end

      run(*args) do |out, _|
        raise if out =~ /#{pattern}/
      end
    rescue ExitError
      # noop
    end
Wait on long running script until output matches a specific pattern

 @example
   cmd.wait 'tail -f /var/log/php.log', /something happened/

 @api public