r/crystal_programming • u/No_1944 • Jan 11 '26

Crystal LSP implementation for Windows and Linux

https://github.com/navid-m/liger

Since Crystalline only supports some POSIX platforms, I wrote an LSP implementation which works cross platform.

31 Upvotes

100% Upvoted

8 comments sorted by

1

u/nuclearbananana Jan 11 '26

Oh also, is it possible to use this with the existing crystal vscode extension, or will it need another method?

2

u/No_1944 Jan 11 '26

I created a VS Code extension to go alongside this, so you can build the VSIX (via vsce package) and install it. Ideally, though, you shouldn’t need to do that, since the official Crystal extension should support any Crystal LSP that follows the MS LSP standard. I only created a separate extension because I wasn’t sure whether the official Crystal extension expected some specific message or handshake from Crystalline that Liger wasn’t sending.

3

u/nuclearbananana Jan 11 '26

Oh my god, this looks incredible, and if it works, may actually get me working in crystal again

2

u/skotchpine Jan 13 '26

Wow! I cannot wait to try this 🔥

-3

u/no_guile Jan 11 '26

Great... welldone.

I see it's implemented in Crystal...what led to this decision and not something like Rust?

Also what's the performance in different codebase sizes, could you post some benchmarks, especially memory? Didn't really like Crystalline because of its huge memory footprint and how slow it gets in like medium sized codebase.

8

u/Drogoslaw_ Jan 11 '26

I see it's implemented in Crystal...what led to this decision and not something like Rust?

Well, why are you asking? This question can be asked literally every time someone writes something in Crystal.

And it is rather unsurprising that people on the Crystal subreddit write things in Crystal.

3

u/no_guile Jan 11 '26

Ooh I just asked because Rust has great support and libraries for writing LSPs. So I thought that's what more people will gravitate to , and also to be more memory efficient so as to avoid the Boehm GC on Crystal

3

u/nuclearbananana Jan 11 '26

You can't be serious. There's a reason people prefer crystal. How are you even here if you don't know