Problem with Neovim Treesitter Go on Nix

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1

I created an issue on the nvim-treesitter tracker but wanted to ask around here as well. I can’t use go.so files compiled through Nix, but things work if let the nvim-treesitter plugin do the compilation in nix-shell -p gcc. Please see the issue for details. I wanted to package the parsers as Vim plugins in Nixpkgs but before that these things should at least work on NixOS :frowning:

@teto tagging you because I know you use more or less the same combination although you reuse the builtGrammars. Funnily, those too fail for me in the case of Go.

2

There’s a lockfile where certain working revisions of the parsers are pinned. This helps maintain ABI compatibility. Using the revision from the lockfile for go solved my issue.

3

dont know for go but I’ve fixed recently (<1 month) C and bash grammars in nixpkgs.

Last week, @vigoux merged a patch in neovim that checks for the treesitter ABI to give nicer error messages.

I am trying to improve the (neo)vim support into nixos. For now it’s easier to rely on modules but eventually I would like to be able to generate a runtime without. Here are some ways to install the grammars in the correct place:

# with home-manager
  home.file."${config.xdg.configHome}/nvim/parser/c.so".source = "${pkgs.tree-sitter.builtGrammars.c}/parser";

# when using the new nixos neovim module
    runtime."parser/c.so".source = "${pkgs.tree-sitter.builtGrammars.c}/parser";
1 Like
4

@teto problem here is that it is not using the treesitter’r own locked version –
an alternate solution – not pretty but works:

5

I personally have this in my dotfiles

  grammarNix = makeGrammar {
    parserName = "nix";
    includedFiles = [ "parser.c" "scanner.c" ];
    src = "${builtins.fetchGit {
      "url" = "https://github.com/cstrahan/tree-sitter-nix";
      "ref" = "master";
      "rev" = "d5287aac195ab06da4fe64ccf93a76ce7c918445";
      }}/src";
  };

  makeGrammar =
    { includedFiles
    , parserName
    , src
    , name ? parserName
    , version ? "latest"
    }:
    pkgs.vimUtils.buildVimPluginFrom2Nix {
      version = version;
      name = "nvim-treesitter-${name}";
      src = src;
      buildPhase = ''
        runHook preBuild
        mkdir -p parser/
        ${pkgs.gcc}/bin/gcc -o parser/${parserName}.so -I$src/ ${builtins.concatStringsSep " " includedFiles}  -shared  -Os -lstdc++ -fPIC
        runHook postBuild
      '';
    };

and I just manually update the rev with what I get from nvim-treesitter/lockfile.json at 788d212ab3d249a673160779528fe6b03eff93a4 · nvim-treesitter/nvim-treesitter · GitHub

I’d like to at some point upstream something where nvim-treesitter and the grammars are one derivation that you can configure because there’s a dependency between the parsers and nvim-treesitter. Honestly, there’s even a dependency between nvim-treesitter and neovim as far as I understand it.

1 Like
6

Some of these issues are due to the unstable aspect of nvim-treesitter etc.
Upstreaming this could be useful in
GitHub - nix-community/neovim-nightly-overlay: [maintainer=@mjlbach] for instance

7

Yet another solution, this one uses the lockfile too:
https://github.com/hurricanehrndz/nixcfg/tree/main/nix/pkgs/nvim-ts-grammars

1 Like
8

Yet another implementation; dotfiles/default.nix at 0bb5bbb388031283a604f64c2e9afe94e1f4cd55 · willruggiano/dotfiles · GitHub

:slight_smile: