[PLUGIN REQUEST] Support for roslyn-ls or roslyn.nvim integration

[XhuyZ]

Hi! I'm currently using roslyn.nvim for C# and .NET development in Neovim and a newbie in Nix community.

According to its documentation, Nix users are required to have roslyn-ls available in nixpkgs, along with some steps to install it. However, I’ve tried multiple approaches and couldn’t get it to work properly.

While Omnisharp is already supported and works to some extent, it's noticeably slower and lacks many features that make the experience feel IDE-like compared to roslyn.nvim

I would love to see either:

• roslyn-ls added as a module in lsp.servers, so it can be configured directly like other language servers, or
• roslyn.nvim added to the list of supported plugins via plugins.roslyn-nvim or similar.

This would greatly simplify the setup for C# developers using Nixvim.
Thanks so much for all the great work!

[KennethHoff]

I started adding roslyn.nvim in this pr ( #3166 ) but didn't finish it for a few reasons:

1. The repo was seemingly in the middle of a restructuring on how modules were structured
   • Not sure what the current state is
2. Not entirely clear whether this is a plugin or an LSP
   • It's effectively an LSP, but technically a plugin
3. Was asked about being marked as the maintainer, but unsure what that entails.

Your input, especially on the second point, would be greatly appreciated!

[XhuyZ]

I'm still using the lua version — just need roslyn lsp installed via Mason. Still waiting to see proper support in Nixvim. Anyway, great try!

[khaneliman]

This worked to get roslyn-ls setup for me.

plugins.lspconfig.enable = true;
lsp.servers.roslyn_ls = {
    enable = true;

    settings = {
      cmd = [
        "${lib.getExe' pkgs.roslyn-ls "Microsoft.CodeAnalysis.LanguageServer"}"
        "--logLevel"
        "Information"
        "--extensionLogDirectory"
        "fs.joinpath(uv.os_tmpdir() \"roslyn_ls/logs\")"
        "--stdio"
      ];
    };
  };