code: function (onlyMain) {
      codeList.forEach(function (pair) {
        var dom = pair[0]
          , file = pair[1]
          , basename = file.split('.')[0];
        if ((dom === 'app') !== onlyMain) {
          return;
        }
        var code = before(compile(join(o.domains[dom], file)));
        l.push(defineWrap(basename, dom, code));
      });
    }
docs: 6. harvest function splits code into app and non-app code and defineWraps