I’m thinking about writing a pattern matching library for rewrite-clj nodes. Is this something others would use?

Interesting! So find me all the things that match <some pattern>. And maybe also optionally replace? Have you worked out what <some pattern> might look like?

Like a regex for nodes?

My inspiration is Rubocop’s https://docs.rubocop.org/rubocop-ast/node_pattern.html, so I’m going to explore a Clojure-styled version

My mind drifted to https://github.com/lambdaisland/regal and its high level syntax, not sure if that would be of any interest.

It might be helpful to your efforts if I finally got around to implementing those https://github.com/clj-commons/rewrite-clj/issues/114.

What will you be using this for? Do you know yet?

Regal is a good thought, I forgot about that. I’ll check it out

I’ve been doing more work on clj-kondo, which has got me thinking a lot about the nature of writing lints, and I have some limited experience with rubocop and the rubocop ecosystem so I'm curious what clj-kondo’s lints would look like if built using this kind of system instead of how it's currently done (strictly one pass, lint as you go, etc)

If by a long shot what I build ends up helping clj-kondo, then great. Otherwise, I’m just looking to sate my curiosity and have some fun

And maybe build something others could use! But do the interesting and fun part first, which is build a sexp pattern matching library lol

Cool! If you want to bounce ideas or need some enhancements to rewrite-clj, don't be shy!

there are few libs out there. meander is the most stable i think. if you feel it is a bit too much for the task then i have a small one called matchete

clj-kondo traverses the rewrite-clj only once for almost all linters for performance