怎么开发一个node切换源小工具

npmconfigsetregistry源地址

npmconfiggetregistry

{
"npm":{
"home":"https://www.npmjs.org",
"registry":"https://registry.npmjs.org/",
"ping":"https://registry.npmjs.org"
},
"yarn":{
"home":"https://yarnpkg.com",
"registry":"https://registry.yarnpkg.com/",
"ping":"https://registry.yarnpkg.com"
},
"tencent":{
"home":"https://mirrors.cloud.tencent.com/npm/",
"registry":"https://mirrors.cloud.tencent.com/npm/",
"ping":"https://mirrors.cloud.tencent.com/npm"
},
"cnpm":{
"home":"https://cnpmjs.org",
"registry":"https://r.cnpmjs.org/",
"ping":"https://r.cnpmjs.org"
},
"taobao":{
"home":"https://npmmirror.com",
"registry":"https://registry.npmmirror.com/",
"ping":"https://registry.npmmirror.com"
},
"npmMirror":{
"home":"https://skimdb.npmjs.com/",
"registry":"https://skimdb.npmjs.com/registry/",
"ping":"https://skimdb.npmjs.com/registry"
}
}

#!/usr/bin/envnode

const{program}=require('commander')
constPKG=require('../package.json')//引入packagejson
constregistries=require('../registries.json');//引入初始源
constinquirer=require('inquirer');
const{exec,execSync}=require('child_process')//子线程用于执行shell命令
constping=require('node-http-ping')//ping网址的一个库
constfs=require('fs')
constchalk=require("chalk");//console变颜色的一个库
constpath=require('path')
program.version(PKG.version)//设置版本默认命令-V--version

//读取源地址方便设置*
constgetOrigin=async()=>{
returnawaitexecSync('npmgetregistry',{encoding:"utf-8"})
}

//列出所有的源，如果当前有在使用前面加上*
program.command('ls').description('查看镜像').action(async()=>{

constres=awaitgetOrigin()

constkeys=Object.keys(registries)

constmessage=[]

//填充横线算法npm------yarn------
constmax=Math.max(...keys.map(v=>v.length))+3
keys.forEach(k=>{

constnewK=registries[k].registry==res.trim()?('*'+k):(''+k)
constArr=newArray(...newK)
Arr.length=max;
constprefix=Array.from(Arr).map(v=>v?v:'-').join('')

message.push(prefix+''+registries[k].registry)
})
console.log(message.join('n'))
})

//切换源
program.command('use').description('请选择镜像').action(()=>{
inquirer.prompt([
{
type:"list",
name:"sel",
message:"请选择镜像",
choices:Object.keys(registries)
}
]).then(result=>{

constreg=registries[result.sel].registry

exec(`npmconfigsetregistry${reg}`,null,(err,stdout,stderr)=>{

if(err){
console.error('切换错误',err)
}else{
console.log('切换成功')
}
})
})
})



//获取当前源
program.command('current').description('查看当前源').action(async()=>{
constreg=awaitgetOrigin()
constv=Object.keys(registries).find(k=>{
if(registries[k].registry===reg.trim()){
returnk;
}
})
console.log(chalk.blue('当前源:',v))
})

//ping源
program.command('ping').description('测试镜像地址速度').action(()=>{
inquirer.prompt([
{
type:"list",
name:"sel",
message:"请选择镜像",
choices:Object.keys(registries)
}
]).then(result=>{

consturl=registries[result.sel].ping.trim()

ping(url).then(time=>console.log(chalk.blue(`响应时长:${time}ms`)))
.catch(()=>console.log(chalk.red('GG')))

})
})

//添加源读写registries.json文件实现
program.command('add').description('自定义镜像').action(()=>{
inquirer.prompt([
{
type:"input",
name:"name",
message:"请输入镜像名称",
validate(answer){
constkeys=Object.keys(registries)
if(keys.includes(answer)){
return`不能起名${answer}跟保留字冲突`
}
if(!answer){
return'名称不能为空'
}
returntrue
}
},
{
type:"input",
name:"url",
message:"请输入镜像地址",
validate(answer){
if(!answer){
return`url不能为空`
}
returntrue
}
}
]).then(result=>{

constdel=(url)=>{
constarr=url.split('')
//本来想用at16以下不支持
returnarr[arr.length-1]=='/'?(arr.pop()&&arr.join('')):arr.join('')
}

registries[result.name]={
home:result.url.trim(),
registry:result.url.trim(),
ping:del(result.url.trim()),//去掉末尾/不然无法ping
}
fs.writeFileSync(path.join(__dirname,'../registries.json'),JSON.stringi免费云主机、域名fy(registries,null,4))
console.log(chalk.blue('添加完成'))
})
})



program.parse(process.argv)

npmixmzs-g

mmpls

mmpuse

mmpcurrent

mmpping

mapadd