直接贴代码：

// https://stackoverflow.com/questions/18112204/get-all-directories-within-directory-nodejs
function getDirectories(srcpath) {
  return fs.readdirSync(srcpath)
    .filter(file => fs.lstatSync(path.join(srcpath, file)).isDirectory())
}

function getFiles(srcpath) {
  return fs.readdirSync(srcpath)
    .filter(file => !fs.lstatSync(path.join(srcpath, file)).isDirectory())
}