def dialog(options)
    type = options[:type]
    string = ""
    options.each_pair do |key, value|
      str << " --#{e_sh key} "
      Array(value).map { |s| e_sh s }.join(" ")
    end
    cd = ENV['TM_SUPPORT_PATH'] + '/bin/CocoaDialog.app/Contents/MacOS/CocoaDialog'
    result = %x{#{e_sh cd} 2>/dev/console #{e_sh type} #{str}}
    return_value = result.slice!(/^([^\n]+)\n/).chomp
    if return_value == "Cancel" then
      if block_given? then
        throw SystemExit
      else
        return nil
      end
    else
      yield result if block_given?
      return result
    end
  end