code: function getProductionPath(assetPath, flags) {
    var ext = path.extname(assetPath);
    var filename = assetPath.slice(0, assetPath.lastIndexOf(ext));
    var out = filename;
    if (_.contains(flags, 'min')) {
      out += '.min';
    }
    out += ext;
    if (_.contains(flags, 'gz')) {
      out += '.gz';
    }
    return out;
  }
docs: Changes paths like so: ASSET{/src/script.js,gz,min} => /src/script.min.js.gz