/*! simple-concat. MIT License. Feross Aboukhadijeh <https://feross.org/opensource> */
module.exports = function (stream, cb) {
  var chunks = [];
  stream.on('data', function (chunk) {
    chunks.push(chunk);
  });
  stream.once('end', function () {
    if (cb) cb(null, Buffer.concat(chunks));
    cb = null;
  });
  stream.once('error', function (err) {
    if (cb) cb(err);
    cb = null;
  });
};