nodejs 命令行解析器 comander 介绍

忘是亡心i 2022-03-06 16:18 347阅读 0赞

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][https_blog.csdn.net_henryhu712_article_details_84262290]

[https_blog.csdn.net_henryhu712_article_details_84262290]: https://blog.csdn.net/henryhu712/article/details/84262290