Nix noob. How do I add rustaceanvim to my home-manager config and set it up correctly

[multivac61]

Here's my config. Would love to learn how to add rustaceanvim to it 🤩

[mrcjkb]

Hey 👋

rustaceanvim is available in nixpkgs-unstable and will be available in the NixOS 23.11 release (which should be out by the end of this month).

It looks like your flake is using the master branch of nixpks, so it should be available there, too. I.e. you should be able to just add rustaceanvim to your plugins list and you're good to go.

If you want to use the bleeding-edge latest version of this plugin, I also provide a flake that you can add to your flake's inputs:

rustaceanvim.url = "github:mrcjkb/rustaceanvim";

And then you can add inputs.rustaceanvim.overlays.default to your NixOS module:

nixpkgs.overlays = [
  inputs.rustaceanvim.overlays.default
];

As you've been using rust-tools.nvim with lspconfig, you'll have to remove it from your config (or it may conflict with this plugin).
You can keep lspconfig, but don't setup rust_analyzer with it.

The rust-tools.nvim options are pretty much the same as the rustaceanvim ones, only that you set them with a vim.g.rustaceanvim = {...} table, instead of calling a setup function (which is what lazy.nvim does under the hood when you pass it an opts table). You can put that anywhere in your Neovim config. I just put it in init.lua, but you can also put it in plugin/rustaceanvim.lua or in a lazy.nvim plugin spec's init or config function.

Breaking changes from rust-tools.nvim to rustaceanvim are covered in the changelog.

Hope this helps 😄
Please let me know if you run into any issues.

[jdsee]

Hi 👋

Thanks a lot for this elaborate answer and the great work on the plugin!

Unfortunately I'm still stuck. My Neovim-config is written in Lua even though I'm using Home-Manager on NixOS. I don't really want to migrate that whole thing to Home-Manager.

It seems like rustaceanvim doesn't work properly on NixOS when not installed via Nix. Most LSP features work just fine on local code but some of them (go to definition, hover, etc.) don't work on the standard library and other external sources.

nix run "github:mrcjkb/rustaceanvim#nvim-minimal-stable" works perfectly.

Running minimal.lua results in the same problem. The following error is shown in the log:

[ERROR project_model::workspace] failed fetching data layout for ManifestPath { file: AbsPathBuf("/home/jdsee/projects/rust/ownership/Cargo.toml") } workspace e=RUSTC_BOOTSTRAP="1" "rustc" "-Z" "unstable-options" "--print" "target-spec-json" failed

I also tried to add the overlay from the flake, but got the same error there.

I guess this issue could be related to the dynamic linker but have absolutely no idea how to further debug it. Is it possible to integrate rustaceanvim via Nix without needing to migrate my whole config to Home-Manager?

Any ideas or help is very much appreciated 🙏

[mrcjkb]

@jdsee this looks like a toolchain issue (I think the error message you're seeing comes from rust-analyzer).

In your config, you add rust-analyzer to your home.packages, but no other rust tools. You also need cargo and rustc.

If you run :checkhealth rustaceanvim, it should tell you what is missing 😄

[jdsee]

Oh wow, now I feel silly 😄

I have cargo installed in another place and so far used nix-shells to pull in rust toolchain. Unfortunately I didn’t have a nix-shell in the project that I used to try out rustacaenvim.

Thanks a bunch for the quick reply and your help 🙏 I’m completely new to rust and this plugin as well as your support are a huge motivation!

[damccull]

Solved my toolchain issue too. :D And I am using kickstart-nix.nvim.