解决fs.rename重复操作文件消失问题

最近需要将大量图片重命名 发现重复执行rename脚本之后 图片会消失 原因在于fs.rename异步执行
解决方案如下：

let dirpath = 'img'
async function readDir (path) {
  return new Promise(resolve => {
    fs.readdir(path, (err, files) => {
      if (err) throw err
      resolve(files)
    })
  })
}
async function renameFile (oldName, newName) {
  return new Promise(resolve => {
    fs.rename(oldName, newName, function (err) {
      if (err) throw err
      resolve(console.log('suc'))
    })
  })
}
async function rename (path) {
  let files = await readDir(path)
  files.map(async (file, index) => {
    let oldName = path + '/' + file
    let newName = path + '/' + index + file.slice(-4)
    await renameFile(oldName, newName)
  })
}
rename(dirpath)