node.js 设置脚本命令

Posted 2020-10-31 Ajanuw

yargs模块 https://www.npmjs.com/package/yargs https://github.com/yargs/yargs/blob/HEAD/docs/api.md

脚本文件

// /bin/main.js
#!/usr/bin/env node
console.log(
  123
);

package.json

{
  "name": "sh",
  "version": "1.0.0",
  "description": "",
  "main": "main.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "bin": {
    "r32": "./bin/main.js"
  }
}

在脚本根目录执行 cnpm i -g ./
r32 执行命令就会出现 123

这是一个返回 随机数的命令

#!/usr/bin/env node

const {
  argv
} = require('yargs')
  .config({
    s: 'c0'
  })
  .option('all', {
    describe: '查看返回字符串类型'
  })
  .alias('v', 'version')
  .help('help')


if (argv.version) {
  console.log('1.0.0');
  return;
}

if (argv.all) {
  console.log(`
    --s=c0  默认返回大小写字母和数字 [c1 全大写] [c2 全小写] [c3 全小写]
  `);
  return;
}

let len = argv._[0] && typeof + argv._[0] === "number" ?
  +argv._[0] :
  32

const c0 = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678'; // 大小写字母和数字
const c1 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'; // 大写
const c2 = 'abcdefghijklmnopqrstuvwxyz'; // 小写
const c3 = '123456789'; // 小写

let c = argv.s; // 默认大小写数字

switch (c) {
  case 'c1':
    c = c1;
    break;
  case 'c2':
    c = c2;
    break;
  case 'c3':
    c = c3;
    break;
  default:
    c = c0;
    break;
}

const random = (a, b) => Math.floor(Math.random() * (b - a + 1) + a);

function randomString32(len, c) {
  // 返回随机字符串
  const c_len = c.length;
  return new Array(len)
    .fill()
    .reduce((acc) => acc += c[random(0, c_len - 1)], '')
}

const str = randomString32(len, c);
const exec = require('child_process').exec ;
exec(`echo ${str} | clip`, (error, stdout, stderr)=>{
  if(error) console.log('复制到粘贴板失败!');
})
console.log(str);

>node .\bin\main.js 6 --s=c3
842773