yargs

yargs.js

const i = yargs
  .usage('$0 -u <url> [options]')
  .option('url', {
    alias: 'u',
    describe: '专辑/歌单 url',
    required: true,
    type: 'string',
  })
  .option('concurrency', {
    alias: 'c',
    describe: '设置同时下载数量',
    default: 5,
    type: 'number',
  })
  .option('format', {
    alias: 'f',
    describe: '设置文件格式',
    default: ':name/:singer - :songName.:ext',
  })
  .choices('quality', [128, 192, 320])
  .option('quality', {
    alias: 'q',
    describe: '设置音质',
    default: 320,
  })
  .coerce('quality', num => num * 1000)
  .option('max-times', {
    describe: '设置下载重试次数',
    default: 5,
    type: 'number',
  })
  .option('timeout', {
    describe: '设置下载超时(分)',
    default: 3,
    type: 'number',
  })
  .coerce('timeout', num => num * 60 * 1000) // to ms
  .example(
    '10首同时下载',
    'yun -c 10 -u http://music.163.com/#/playlist?id=12583200'
  )
  .example(
    `下载格式为 '歌手 - 歌名'`,
    `yun -f ':singer - :songName.:ext' -u http://music.163.com/#/playlist?id=12583200`
  )
  .epilog('Homepage: http://github.com/magicdawn/yun-playlist-downloader')
  .version(pkgVersion)
  .help(true)

const argv = i.argv
console.log(argv)

https://github.com/magicdawn/yun-playlist-downloader