Function batchedRead

build-system/common/transform-cache.js:108–124

* Returns the string contents and hash of the file at the specified path. If * multiple reads are requested for the same file before the first read has * completed, the result will be reused. * * @param {string} path * @return {Promise }

(path)

 * @return {Promise<ReadResult>}
 */
function batchedRead(path) {
  let read = readCache.get(path);
  if (!read) {
    read = fs
      .readFile(path)
      .then((contents) => ({
        contents,
        hash: md5(contents),
      }))
      .finally(() => {
        readCache.delete(path);
      });
    readCache.set(path, read);
  }

  return read;
}

module.exports = {
  batchedRead,