code: function readCache (path) {
    var _cache = {
      version : 0,
      items : [{
        name : '默认模板',
        _id  : 'default',
        desc : '默认模板'
      }]
    };
  
    if (!fs.existsSync(path)) {
      writeCache(_cache, path);
    }
    _cache = fs.readFileSync(path,'utf8');
    _cache = JSON.parse(_cache);
    return _cache;
  }
docs: 读取模板缓存