Asynchronous map function that await's returns Promise instead of value

try

async function addFiles(dir,tree) {
  const files = await readDir(dir)
  await Promise.all(files.map(async (name) => {await readDir(dir); return name;})
}

If you're using bluebird you can use this cleaner, shorter syntax with Promise.map

async function addFiles(dir, tree) {
  const files = await readDir(dir);
  return Promise.map(files, async (name) => { await readDir(dir); return name; });
}