neovim-flake/modules/plugins/languages/cue.nix

{
  pkgs,
  config,
  lib,
  ...
}: let
  inherit (lib.options) mkEnableOption literalExpression;
  inherit (lib.meta) getExe;
  inherit (lib.modules) mkIf mkMerge;
  inherit (lib.nvim.types) mkGrammarOption;

  lspOptions = {
    cmd = [(getExe pkgs.cue) "lsp"];
    filetypes = ["cue"];
    root_markers = ["cue.mod" ".git"];
  };

  cfg = config.vim.languages.cue;
in {
  options.vim.languages.cue = {
    enable = mkEnableOption "CUE language support";

    treesitter = {
      enable =
        mkEnableOption "CUE treesitter"
        // {
          default = config.vim.languages.enableTreesitter;
          defaultText = literalExpression "config.vim.languages.enableTreesitter";
        };

      package = mkGrammarOption pkgs "cue";
    };

    lsp = {
      enable =
        mkEnableOption "CUE LSP support"
        // {
          default = config.vim.lsp.enable;
          defaultText = literalExpression "config.vim.lsp.enable";
        };
    };
  };

  config = mkIf cfg.enable (mkMerge [
    (mkIf cfg.treesitter.enable {
      vim.treesitter.enable = true;
      vim.treesitter.grammars = [cfg.treesitter.package];
    })

    (mkIf cfg.lsp.enable {
      vim.lsp.servers.cue = lspOptions;
    })
  ]);
}