bug: helix doesn't support absolute paths for language servers

[zoedsoupe]

Are you following the right branch?

• [X] My Nixpkgs and Home Manager versions are in sync

Is there an existing issue for this?

• [X] I have searched the existing issues

Issue description

Helix languages config options module documentation wrongly uses absolute paths for languages servers, which is not supported by Helix yet.

https://nix-community.github.io/home-manager/options.html#opt-programs.helix.languages

Setting up like the docs above gives the following error on Helix (elixir-ls in this example):

$ hx --health elixir

Configured language server: elixir-ls
Binary for language server: 'elixir-ls' not found in $PATH
Configured debug adapter: None
Highlight queries: ✓
Textobject queries: ✓
Indent queries: ✓

More information can be found on a discussion thread created on the helix repo: https://github.com/helix-editor/helix/discussions/8457

Maintainer CC

No response

System information

- system: `"aarch64-darwin"`
 - host os: `Darwin 23.0.0, macOS 14.0`
 - multi-user?: `yes`
 - sandbox: `no`
 - version: `nix-env (Nix) 2.18.0`
 - channels(root): `"nixpkgs"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixpkgs`

[zoedsoupe]

Solution is to add LSP clients packages directly on the home.packages attr or symlink those paths and wrap the helix executable manually.

[zoedsoupe]

maybe will be closed with https://github.com/helix-editor/helix/pull/8511

[zoedsoupe]

that’s strange because it actually does support absolute paths. but something is wrong when running and setting up helix with home manager…

I really need help with this because I don’t know where to start to search about this “bug"

[mschwaig]

I'm using an absolute path in my config, but I've found it difficult to write that config based on the few examples I found online.

Here's what I'm doing: https://github.com/mschwaig/nixos-config/blob/68df68e3b218627b283aad1fcbe08d7056500b5b/home/text/default.nix#L28-L37

Does this help you?

[zoedsoupe]

that’s exactly what i’m doing… using the flake that the helix provides seems to work fine with aboslute paths. however with the default derivation of home-manager it seems the package tries to read other config than the generated one. I’ll investigate but is a weid behaviour…

[MOIS3Y]

@zoedsoupe It looks like the helix version is 23.05 (7f5940be) the way of adding LSP has been changed since it refuses to accept the parameter

language-servers = [ "foo" "bar" ];

 hx test.nix
Bad language config: unknown field `language-servers`, expected one of `name`, `scope`, `file-types`, `shebangs`, `roots`, `comment-token`, `text-width`, `soft-wrap`, `config`, `auto-format`, `formatter`, `diagnostic-severity`, `grammar`, `injection-regex`, `language-server`, `indent`, `debugger`, `auto-pairs`, `rulers`, `workspace-lsp-roots`
in `language`

Now the configuration should look something like this:

# ...
languages = {
  language = [
    {
      name = "nix";
      auto-format = false;
      language-server = {
        name = "nil";
        command = "${pkgs.nil}/bin/nil";
        config = {};  # <-- important I don’t know why(
      };
    }
    # ... add more languages here:
  ];
};

Result healthcheck:

╰─➤  hx --health nix
Configured language server: /nix/store/v0y8i3wqjfjdpmavwndz8wrrknqql9k1-nil-2023-08-09/bin/nil
Binary for language server: /nix/store/v0y8i3wqjfjdpmavwndz8wrrknqql9k1-nil-2023-08-09/bin/nil
Configured debug adapter: None
Highlight queries: ✓
Textobject queries: ✘
Indent queries: ✘

╰─➤  hx --health python
Configured language server: /nix/store/2rrkscyqvfbg0wql8nj08yaril8scm3q-pyright-1.1.329/bin/pyright-langserver
Binary for language server: /nix/store/2rrkscyqvfbg0wql8nj08yaril8scm3q-pyright-1.1.329/bin/pyright-langserver
Configured debug adapter: None
Highlight queries: ✓
Textobject queries: ✓
Indent queries: ✓
╭─stepan@workstation ~

[zoedsoupe]

@MOIS3Y that makes sense but i'm building the flake from version 23.05 from their repo too and i can configure multiple language servers, as I already set up nextls and elixir-la for elixir.

i don't think this is the issue. i will try to build from home manager again and try to understand why is picking the wrong/default config and not the generated one.

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