nvim: move to services we do not specify a pkgset

services/nvim/treesitter.nix

@@ -0,0 +1,54 @@
+{
+  lib,
+  config,
+  pkgs,
+  ...
+}:
+
+lib.mkIf (lib.elem "nvim::treesitter" config.machine.pkgs) {
+  programs.nvim-lazy.lazyPlugins =
+    let
+      treesitter = pkgs.vimPlugins.nvim-treesitter.withAllGrammars;
+      grammars = pkgs.symlinkJoin {
+        name = "treesitter-parsers";
+        paths = treesitter.dependencies;
+      };
+    in
+    [
+      {
+        lazy = false;
+        dir = _: treesitter;
+        event = [
+          "BufReadPost"
+          "BufWritePost"
+          "BufNewFile"
+          "VeryLazy"
+        ];
+        opts = {
+          auto_install = false;
+          highlight = {
+            enable = true;
+          };
+          incremental_selection = {
+            enable = true;
+            keymaps = {
+              init_selection = "gnn"; # set to `false` to disable one of the mappings
+              node_incremental = "grn";
+              scope_incremental = "grc";
+              node_decremental = "grm";
+            };
+          };
+          indent = {
+            enable = true;
+          };
+        };
+        config = # lua
+          ''
+            function(_, opts)
+              vim.opt.rtp:prepend("${grammars}")
+              require("nvim-treesitter.configs").setup(opts)
+            end
+          '';
+      }
+    ];
+}