Lerna脚手架搭建(十四)：commander 脚手架命令注册

一、方法一：command 注册命令 👈

const clone = program.command('clone <source> [destination]');
clone
  .description('clone a repository')
  .option('-f, --force', '是否强制克隆')
  .action((source, destination, cmdObj) => {
    console.log('do clone', source, destination, cmdObj, force);
  });

二、方法二：addCommand 注册命令 👈

const service = new commander.Command('service');
service
  .command('start [port]')
  .description('start service at some port')
  .action((port) => {
    console.log('do service start', port);
  });

service
  .command('stop')
  .description('stop service')
  .action(() => {
    console.log('stop service');
  });

program.addCommand(service);

三、命令监听 👈

program
  .arguments('<cmd> [options]')
  .description('test command', {
    cmd: 'command to run',
    options: 'options for command',
  })
  .action(function(cmd, options){
    console.log(cmd, options);
  });

四、自定义 help 信息 👈

program.helpInformation = function() {
  return '';
}

program.on('--help', function() {
  console.log('your help information');
});

五、实现 debug 模式 👈

program.on('option:debug', function() {
  if (program.debug) {
    process.env.LOG_LEVEL = 'verbose';
  }
});

六、对未知命令监听 👈

program.on('command:*', function(obj) {
  // console.log(obj);
  console.log('未知的命令：' + obj[0]);
  const availableCommands = program.commands.map(cmd => cmd.name());
  console.log('可用命令：' + availableCommands.join(','));
});