demo-copy-fs v1.0.1

const program=require("commander");
const inquirer=require("inquirer");
const fs=require("fs");
program.command("create")
 .description("创建")
 .action((dir)=>{
       inquirer.prompt([{
           type:"checkbox",
           name:"list",
           message:"请选择你要合并的文件",
           choices:["a.js","b.js","c.js"]
       }]).then(res=>{
           const {list}=res;
           inquirer.prompt([{
               type:"input",
               name:"filename",
               message:"请输入你要创建的文件名?",
               validate:(val)=>{
                   if(val.indexOf(".")>-1){
                        return true
                   }  
               }   
           }]).then(res=>{
               let str="";
                str+=list.map(item=>{
                     return fs.readFileSync(item,"utf-8")
                 })
                fs.writeFileSync(res.filename,str)
           })
       })
 })
 program.version("1.0.0");
 program.parse(process.argv);