wrapper/build: allow nulling treesitter grammars

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: Iafdfb65fbaf24b7fa95c99a6bc4fa9176a6a6964

docs/manual/release-notes/rl-0.9.md

@@ -6,6 +6,7 @@
   `vimPlugins.nvim-treesitter`. Namely, it changes from the frozen `master`
   branch to the new main branch. This change removes incremental selections, so
   it is no longer available.
+
 - [obsidian.nvim] now uses a maintained fork which has removed the `dir`
   setting. Use `workspaces` instead:
 
@@ -78,6 +79,8 @@
 [NotAShelf](https://github.com/notashelf):
 
 - Lazyload noice.nvim and nvim-web-devicons on `DeferredUIEnter`
+- Allow nulling treesitter packages for various language modules, filter `null`
+  values in `vim.treesitter.grammars`.
 
 [jfeo](https://github.com/jfeo):
 

modules/wrapper/build/config.nix

@@ -24,7 +24,10 @@
     );
 
   # Build a given Treesitter grammar.
-  buildTreesitterPlug = grammars: vimPlugins.nvim-treesitter.withPlugins (_: grammars);
+  buildTreesitterPlug = grammars:
+    vimPlugins.nvim-treesitter.withPlugins (
+      _: builtins.filter (g: g != null) grammars
+    );
 
   pluginBuilders = {
     nvim-treesitter = buildTreesitterPlug config.vim.treesitter.grammars;