code: function buildVdt(destPath) {
      return gulp.src(['./components/**/*.vdt'], {base: './'})
          .pipe(vdt({
              format: 'cjs',
              delimiters: ['{{', '}}'],
              noWith: true,
              skipWhitespace: true,
          }))
          .pipe(babel())
          .pipe(tap(function(file) {
              file.path = file.path.replace('.js', '.vdt.js');
          }))
          .pipe(gulp.dest(destPath));
  }
docs: ****************
  build packages
  ****************