nodejs 命令行解析器 comander 介绍

直接举例：

安装 commander

使用下面的命令，创建路径，安装 commander 包：

mkdir ex
cd ex
node init
node install commander

创建命令文件

创建命令文件 ex1.js

#!/usr/bin/env node

var program = require('commander')

program
  .version('0.1.1')
  .option('-p, --peppers', 'Add peppers')
  .option('-P, --pineapple', 'Add pineapple')
  .option('-b, --bbq-sauce', 'Add bbq sauce')
  .option('-c, --cheese [type]', 'Add the specified type of cheese [marble]', 'marble')
  .parse(process.argv)

console.log('You ordered a pizza with:')
if (program.peppers) console.log(' - peppers')
if (program.pineapple) console.log(' - pineapple')
if (program.bbqSauce) console.log('  - bbq')
console.log(' - %s cheese', program.cheese)

使其可执行：

chmod +x ex1.js

运行结果

[MAIN] ➜  ~/25.ser git:(master) ✗ ./ex1.js 
You ordered a pizza with:
 - marble cheese
[MAIN] ➜  ~/25.ser git:(master) ✗ ./ex1.js -p
You ordered a pizza with:
 - peppers
 - marble cheese
[MAIN] ➜  ~/25.ser git:(master) ✗ ./ex1.js -pP
You ordered a pizza with:
 - peppers
 - pineapple
 - marble cheese
[MAIN] ➜  ~/25.ser git:(master) ✗ ./ex1.js -p -P
You ordered a pizza with:
 - peppers
 - pineapple
 - marble cheese
[MAIN] ➜  ~/25.ser git:(master) ✗ ./ex1.js -p -P -c Feta
You ordered a pizza with:
 - peppers
 - pineapple
 - Feta cheese

如果用 node.js 写命令行，请看这篇文章：https://blog.csdn.net/henryhu712/article/details/84262290