npm重要模块--commander

https://github.com/tj/commander.js/blob/master/Readme_zh-CN.md#%E5%A3%B0%E6%98%8E-program-%E5%8F%98%E9%87%8F

#!/usr/bin/env node

var program = require('commander');
 
program
    .version(require('../package').version)
    .parse(process.argv);

program
    .command('buildRouter')
    .description('refresh routers..')
    .action(require('../lib/buildRouter'))

    console.log('hello cl22ooo2i');


program
  .option('-d, --debug', 'output extra debugging')
  .option('-s, --small', 'small pizza size')
  .option('-p, --pizza-type ', 'flavour of pizza');

program.parse(process.argv);

const options = program.opts();
if (options.debug) console.log(options);
console.log('pizza details:');
if (options.small) console.log('- small pizza size');
if (options.pizzaType) console.log(`- ${options.pizzaType}`);


// 选填：

program
  .option('-c, --cheese [type]', 'Add cheese with optional type');

program.parse(process.argv);

const options = program.opts();
if (options.cheese === undefined) console.log('no cheese');
else if (options.cheese === true) console.log('add cheese');
else console.log(`add cheese type ${options.cheese}`);

// 必填
program
  .requiredOption('-c, --cheese ', 'pizza must have cheese');

program.parse(process.argv);


// 命令
program
  .command('clone  [destination]')
  .description('clone a repository into a newly created directory')
  .action((source, destination) => {
    console.log('clone command called');
  });



program
  .command('start ', 'start named service')
  .command('stop [service]', 'stop named service, or all if no name supplied');



// 设置命令参数
program
  .version('0.1.0')
  .arguments(' [password]')
  .description('test command', {
    username: 'user to login',
    password: 'password for user, if required'
  })
  .action((username, password) => {
    console.log('username:', username);
    console.log('environment:', password || 'no password given');
  });



// 可变参数
  program
  .version('0.1.0')
  .command('rmdir ')
  .action(function (dirs) {
    dirs.forEach((dir) => {
      console.log('rmdir %s', dir);
    });
  });
// 这个非常重要，不能丢
program.parse(process.argv)