src/cli/stream-utils.js
function (vinyl) {
    return path.extname(vinyl.path) === ".lnxs" ? options.spec.dir : options.output;
  }
function (vinyl) {
    return path.extname(vinyl.path) === ".lnxs" ? options.spec.dir : options.output;
  }
function ( vinyl ) { return path . extname ( vinyl . path ) === ".lnxs" ? options . spec . dir : options . output ; }
convert from vinyl stream to regular stream
convert from vinyl stream to regular stream