做个笔记，常用的npm包

命令行

• commander （v2.9.0）

const program = require('commander')
program
 .usage(' [project-name]')  //示例
 .option('-c, --clone', 'use git clone')   //选项
//更详细的选项
(function () {
 program.parse(process.argv)  //解析参数
 if (program.args.length < 1) return program.help()  //触发on --help事件
})()

program.on( '--help', () => {
 console.log('  Examples:')
 console.log()
 console.log(chalk.gray('    # create a new project with an official template'))
 console.log('    $ vue init webpack my-project')
 console.log()
 console.log(chalk.gray('    # create a new project straight from a github template'))
 console.log('    $ vue init username/repo my-project')
 console.log()
} )

命令行着色

• chalk (v2.1.0)

const chalk = require( 'chalk' )
//变成红色
console.log( chalk.red('    # hello world ！') );

询问confirm

• inquirer (v6.0.0)

const inquirer = require('inquirer')
inquirer.prompt([{
    type: 'confirm',  //类型
    message: '你确定要这么干下去？',
    name: 'answers'  //返回的promise的  resolve值
  }]).then(answers => {
        console.log( answers )  //  true | false
   }).catch()

版本号

• semver (v5.1.0)

const semver = require('semver');
semver.satisfies( process.version,  >=5.0 ) // true | false //当前运行版本是否满足 大于5.0
semver.clean('  =v1.2.3   ') // '1.2.3'  格式化

加载动画

• ora (v1.3.0)

⠴ downloading template  这样子的
const ora = require('ora')
let spinner = ora(' downloading template!! ')
spinner.start()   //开始
spinner.stop()  //结束

删除文件

• rimraf (v2.5.0)

const rm = require('rimraf')
rm.sync( '/User/hehe')  //同步删除该目录  rm -rf 

下载模板&&仓库

• download-git-repo (v1.0.1)

const download = require( 'download-git-repo' )
//clone true: git clone 下载 false: http down
download('git地址', '存放的目录', { clone: false }, err => {
    console.log('成功')
})

命令行解析参数

• minimist (laster)

node index.js --beep=boop -t -z 12 -n5 foo bar
const argv = require('minimist')(process.argv.slice(2));
console.dir(argv);
// { _: [ 'foo', 'bar' ], beep: 'boop', t: true, z: 12, n: 5 }