[feature] Share rules

[q0w]

⭐ Suggestion

A way to use external rules, not only in local dirs.

💻 Use Cases

I want to implement a set of rules in one repo and use it in another. It would be great with some way to enable external rules.

[HerringtonDarkholme]

Hi @q0w , thanks for your continuous support for ast-grep!

Sharing rules are not done on purpose because I have not decided the best way to share rules.

Is using git submodule solving your problem? Or publishing it on npm?

Looking forward to your feedback.

[q0w]

I can package my rules through pypi, but the problem is an auto-discovery of these rules. Users can use different names for virtualenv. I cant force it in config ruleDirs. Maybe local configs + default root config can solve this

[HerringtonDarkholme]

If I understand it correctly, you are suggesting local configs which can discover rules installed in virtualenv?
It will require ast-grep implement pypi's resolution logic or discovery logic. Is it correct?

[q0w]

I think ast-grep should not implement pyp's resolution logic. Local config is needed to provide a path for a local venv.

So there is a root config sgconfig.yml that handles local rules:

ruleDirs:
  - .rules
  - .venv/package-name/rules # default venv name

And there is a local user config which is not tracked by git

ruleDirs:
  - .venv2/package-name/rules # user's venv name

Ast-grep should merge ruleDirs = .rules + .venv/package-name/rules + .venv2/package-name/rules