Add Nim language support

[omentic]

No description provided.

[omentic]

Ah, I now see that there have been quite a few previous PRs. Also looks like nvim-treesitter/nvim-treesitter#3320 is a WIP for nvim-treesitter.

[zetashift]

There is also https://github.com/nim-lang/langserver which one might want to use instead of nimlsp

[mtoohey31]

Would it be possible to merge these changes minus the grammar for now, so we at least have comment, indentation, and language server support out of the box?

[omentic]

Thanks for the bump. Rebased on master and switched to nimlangserver.

Currently playing around with writing basic highlight / indentation queries based on alaviss/tree-sitter-nim - I think eventually aMOPel/tree-sitter-nim will be better as it exposes much more of Nim, but it's also more complicated, and I don't want to mess around with it right now while the rule structure is in flux.

[mtoohey31]

On nimlangserver vs nimlsp, it looks like the nimlsp project is more active, but that's just based on commits/issues/stars, so take that with a grain of salt. There's a comparison here: nim-lang/langserver#2, but it's not too in-depth. Also, I wrote my first line of nim today, so I'm not really qualified to comment on which works better. However, I was using nimlsp earlier today and it looks like it crashes if the file doesn't exist on disk yet...

@zetashift have you used both? Would you be able to offer your opinion on which we should include?

[omentic]

I switched to nimlangserver after getting fed up with nimlsp's constant crashes and have found it much more mature and stable (fewer crashes, better recovery after crashes, equivalent support via nimsuggest, no bug with orphan processes pegging your CPU at 100%)

[bfg-coding]

Is there anything that I can help with to get this moving forward? I'd like to have a good DX with helix and nim

[Desdaemon]

Been experimenting with this on my end, some small thoughts:

• The grammar from aMOPel/tree-sitter-nim seems to work fine, however type annotations are a bit hard to write highlight queries for.
• Agreed with nimlangserver working much better, but at least on my Mac M1 it has a bug where child processes are not cleaned up properly, though luckily was easy to fix/patch.

[omentic]

Hi, apologies, I've been pretty busy and will continue to be busy for at least another week or so. I ran into issues getting helix to recognize my .scm files whatsoever, that I still need to debug, and left off there.

If any of you would like to work on it in the meantime, feel free - I was modelling the .scm files off of the corresponding Rust and Python files, and adding in keywords taken from the manual as necessary - but getting this up and running is definitely on my todo list (just not a high priority right now).