code: function isWritable(p) {
      if (!fs.existsSync(p)) {
          return false;
      }
      let stats = fs.statSync(p);
      let mode = stats.mode;
      let uid = process.getuid ? process.getuid() : 0;
      let gid = process.getgid ? process.getgid() : 0;
      let owner = uid === stats.uid;
      let group = gid === stats.gid;
      return !!(owner && (mode & parseInt('00200', 8)) ||
          group && (mode & parseInt('00020', 8)) ||
          (mode & parseInt('00002', 8)));
  }
docs: Checks if the file or folder p is writable
  
  @param {string} p
  @returns {boolean}