dotfiles VS ghcup-hs

You need to ensure that the version of GHC you're using works with HLS, I've been bitten by this a few times when I'm not paying attention when upgrading GHC. I use mason and haven't had any issues getting HLS to work with it, well, rather, getting it to work took a little bit but now it's been working flawlessly since. You can glance at my config for LSP here if you want.

The other answers are now wrong with the 0.7 release, using the resolved_capabilities table is now deprecated. I personally moved to using lukas-reineke/lsp-format.nvim together with null-ls. You can see the change in my dotfiles if you want to. I had some weird formatting behaviour with rustfmt and async formatting, so I changed the lsp-format.nvim setup to be require("lsp-format").setup({ sync = true }).

I'm not OP, but here is my setup for Rust/Typescript/Lua/Deno with null-ls and autoformatting. I've also had a bunch of problems getting everything working together, but this setup finally works. You also need to look at the ’lsp.lua’ file for keybindings and such setups for LSP, but the linked file is the guts of my setup.

But also ghcup does that and I already use ghcup to manage stack itself, the haskell language server (hls), and even the compatible ghc version. Recently I’ve been hooking up stack to make it use ghcup-installed ghc versions. So, it feels simpler to just use ghcup.

I'd recommend using ghcup to install Haskell nowadays. (https://www.haskell.org/ghcup/) It makes it easy to install and switch versions of the compiler, language server, and build tools.

The compiler now shows more helpful error messages and GHCup allows us to manage multiple versions of GHC, Stack, and HLS (Haskell Language Server) in a breeze. Compilation time is faster now, but I believe it is because hardware has become faster over the years. Unfortunately, cross-compiling is not yet as simple.

Install Haskell using GHCup. In days of old installing Haskell used to be a pain, but nowadays Haskell comes with a self-isolated thing call ghcup - you install it once, and then it installs the rest of the universe in its own isolated directory that can be independently deleted or updated without affecting the rest of your system.

Try this https://www.haskell.org/ghcup/ but with Window's WSL2.

I've downloaded GHCup, hls and stack from the command from this link https://www.haskell.org/ghcup/

The instructions to install ghcup are here: https://www.haskell.org/ghcup/

I have been using helix with ghcup installed ghc(s) and language servers. It works with Haskell out of box, no configuration necessary. Helix is a modal editor, similar to but distinctly different from the vi family. Although a long time vim user I have found the switch to helix not too difficult and definitely worth the trouble.