隐藏功能的正则不支持断言

[Sdator]

Please make sure of the following things

• [X] I have read the documentation.
• [X] I'm sure there are no duplicate issues or discussions.
• [X] I'm sure it's due to alist and not something else(such as Dependencies or Operational).
• [X] I'm sure I'm using the latest version

Alist Version / Alist 版本

v3.2.1

Driver used / 使用的存储驱动

All

Describe the bug / 问题描述

场景：只显示特定格式文件而隐藏其他文件或文件夹。

在元信息中的隐藏填入以下正则，以下正则在vscode、js中测试过可行如果写错了或你有更好的办法请告诉我

.*\.(?!mp4$).*

保存后，右上角提示红色错误信息

..(?!mp4$). is illegal: error parsing regexp: invalid or unsupported Perl syntax: (?!

测试过 (?!exp) 和 (?<!exp) 两种断言都会报错，猜测是特殊字符触发了字符串的安全过滤？

建议

Alist目前的正则不太友好，很多对正则不熟悉的人无法通过它来实现一些比较复杂的过滤，希望能加入一些UI组件来帮助用户。

比如我们可以内置一些选项让用户去勾选或填写

文件过滤

• 匹配的是文件还是文件夹还是所有

  • [ ] 文件
  • [ ] 文件夹
  • [ ] 所有

• 匹配的前缀、匹配的后缀（应该是大多数人需要的），匹配的关键字

  • [用户编辑框]

• 功能

  • [ ] 隐藏
  • [ ] 显示

这样当我想要只显示mp4和mp3文件时我可以这样做

第一条过滤:

• [x] 所有
• [x] 关键字
  • "*"
• [x] 隐藏

第二条过滤:

• [x] 文件
• [x] 后缀
  • "mp4,mp3"
• [x] 显示

通过以上两条规则我们就实现了只显示mp4和mp3类型的文件，规则优先级是从上到下，所以它会先隐藏掉所有文件然后只显示我们感兴趣的文件。当然这只是一个抛砖引玉的方法，可以实现的方式还有很多比如大家熟悉的 .gitignore

Reproduction / 复现链接

没有链接

Logs / 日志

.*\.(?!mp4$).* is illegal: error parsing regexp: invalid or unsupported Perl syntax: `(?!`

[welcome[bot]]

Thanks for opening your first issue here! Be sure to follow the issue template!

[xhofe]

Negative lookahead isn't supported for technical reasons, specifically because it conflicts with the O(n)-time guarantees of the library. See the golang-nuts group discussion about this, as well as the Caveats section in Regular Expression Matching in the Wild.

https://stackoverflow.com/questions/26771592/negative-look-ahead-in-go-regular-expressions

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