class Autotest::Rspec

  def make_test_cmd(files_to_test)
    return '' if files_to_test.empty?
    return "#{ruby} -S #{spec_command} #{add_options_if_present} #{files_to_test.keys.flatten.join(' ')}"
  end

  # Finds the proper spec command to use.  Precendence is set in the
  # lazily-evaluated method spec_commands.  Alias + Override that in
  # ~/.autotest to provide a different spec command then the default
  # paths provided.
  def spec_command(separator=File::ALT_SEPARATOR)
    unless defined? @spec_command then
      @spec_command = spec_commands.find { |cmd| File.exists? cmd }

      raise RspecCommandError, "No spec command could be found!" unless @spec_command

      @spec_command.gsub! File::SEPARATOR, separator if separator
    end
    @spec_command
  end

  # Autotest will look for spec commands in the following
  # locations, in this order:
  #
  #   * bin/spec
  #   * default spec bin/loader installed in Rubygems
  def spec_commands
    [
      File.expand_path(File.join(File.dirname(__FILE__), '..', '..', 'bin', 'spec')),
      File.join(Config::CONFIG['bindir'], 'spec')
    ]
  end

end