如何用nodejs 开发一个命令行交互工具

{
  "name": "test",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo "Error: no test specified" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "bin": {
    "gen": "bin/gen.js"
  },
  "dependencies": {
    "commander": "^2.15.1"
  }
}

#!/usr/bin/env node
var argv =process.argv;
var filePath =__dirname;
var currentPath =process.cwd();
console.log(argv)
console.log(filePath)
console.log(currentPath)

#!/usr/bin/env node
var program = require('commander');
 program
   .version('0.0.1')
   .option('-C, --chdir <path>', 'change the working directory')
   .option('-c, --config <path>', 'set config path. defaults to ./deploy.conf')
   .option('-T, --no-tests', 'ignore test hook')
   .option('-p, --peppers', 'Add peppers')
   .option('-P, --pineapple', 'Add pineapple')
   .option('-b, --bbq-sauce', 'Add bbq sauce')
   .option('--p, --fuck-you', 'fuckyou')
   .option('build --env <fuckyou>', 'fuckyou2')
   .parse(process.argv);
if (program.peppers) console.log('  - peppers');
if (program.pineapple) console.log('  - pineapple');
if (program.bbqSauce) console.log('  - bbq');
if (program.fuckYou) console.log('fuckyou');
if (program.env && program.args.length != 0) {
    console.log(program.args);
}
 program
   .command('init')
   .description('run remote setup commands')
   .action(function() {
     console.log('setup');
   });
 program
   .command('exec <cmd>')
   .description('run the given remote command')
   .action(function(cmd) {
     console.log('exec "%s"', cmd);
   });
 program
   .command('teardown <dir> [otherDirs...]')
   .description('run teardown commands')
   .action(function(dir, otherDirs) {
     console.log('dir "%s"', dir);
     if(otherDirs) {
       otherDirs.forEach(function(oDir) {
         console.log('dir "%s"', oDir);
       });
     }
   });