inject bash highlighting in nix shell scripts

flake.nix

@@ -144,6 +144,7 @@
         (import ./overlays/neovim-plugins.nix inputs)
         (import ./overlays/calibre-web.nix)
         (import ./overlays/disko.nix inputs)
+        (import ./overlays/tree-sitter-bash.nix)
       ];
 
       # System types to support.

modules/common/neovim/config/syntax.nix

@@ -3,19 +3,28 @@
   plugins = [
     (pkgs.vimPlugins.nvim-treesitter.withPlugins (_plugins:
       with pkgs.tree-sitter-grammars; [
-        tree-sitter-hcl
-        tree-sitter-python
-        tree-sitter-lua
-        tree-sitter-nix
+        tree-sitter-bash
         tree-sitter-fish
+        tree-sitter-hcl
+        tree-sitter-json
+        tree-sitter-lua
+        tree-sitter-markdown
+        tree-sitter-markdown-inline
+        tree-sitter-nix
+        tree-sitter-python
         tree-sitter-toml
         tree-sitter-yaml
-        tree-sitter-json
       ]))
     pkgs.vimPlugins.vim-matchup # Better % jumping in languages
+    pkgs.vimPlugins.playground # Tree-sitter experimenting
     pkgs.vimPlugins.nginx-vim
     pkgs.vimPlugins.vim-helm
     pkgs.vimPlugins.vim-puppet
+    (pkgs.vimUtils.buildVimPluginFrom2Nix {
+      pname = "nmasur";
+      version = "0.1";
+      src = ../plugin;
+    })
   ];
 
   setup."nvim-treesitter.configs" = {

modules/common/neovim/plugin/after/queries/nix/injections.scm

@@ -0,0 +1,8 @@
+expression: (apply_expression
+  function: (apply_expression
+    function: (select_expression
+      attrpath: (attrpath) @writeshell (#match? @writeshell "^writeShell.*$")
+      )
+    )
+  (indented_string_expression) @bash
+)

overlays/tree-sitter-bash.nix

@@ -0,0 +1,16 @@
+# Fix: bash highlighting doesn't work as of this commit:
+# https://github.com/NixOS/nixpkgs/commit/49cce41b7c5f6b88570a482355d9655ca19c1029
+
+_final: prev: {
+  tree-sitter-grammars = prev.tree-sitter-grammars // {
+    tree-sitter-bash = prev.tree-sitter-grammars.tree-sitter-bash.overrideAttrs
+      (old: {
+        src = prev.fetchFromGitHub {
+          owner = "tree-sitter";
+          repo = "tree-sitter-bash";
+          rev = "493646764e7ad61ce63ce3b8c59ebeb37f71b841";
+          sha256 = "sha256-gl5F3IeZa2VqyH/qFj8ey2pRbGq4X8DL5wiyvRrH56U=";
+        };
+      });
+  };
+}