languages/liquid: add syntax highlighting support for liquid templating

configuration.nix

@@ -105,6 +105,7 @@ isMaximal: {
       jinja.enable = false;
       tailwind.enable = false;
       svelte.enable = false;
+      liquid.enable = false;
       tera.enable = false;
       twig.enable = false;
       gettext.enable = false;

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

@@ -229,6 +229,9 @@
 - Added [tera](https://keats.github.io/tera/) language support (syntax
   highlighting only).
 
+- Added [liquid](https://keats.github.io/tera/) language support (syntax
+  highlighting only) via `languages.liquid`.
+
 - Added Debugging support to `languages.odin` with
   [nvim-dap-odin](https://github.com/NANDquark/nvim-dap-odin).
 

modules/plugins/languages/default.nix

@@ -25,6 +25,7 @@ in {
     ./html.nix
     ./tera.nix
     ./twig.nix
+    ./liquid.nix
     ./haskell.nix
     ./java.nix
     ./jinja.nix

modules/plugins/languages/liquid.nix

@@ -0,0 +1,34 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}: let
+  inherit (lib.options) mkEnableOption literalExpression;
+  inherit (lib.modules) mkIf mkMerge;
+  inherit (lib.nvim.types) mkGrammarOption;
+
+  cfg = config.vim.languages.liquid;
+in {
+  options.vim.languages.liquid = {
+    enable = mkEnableOption "Liquid templating language support";
+
+    treesitter = {
+      enable =
+        mkEnableOption "Liquid treesitter"
+        // {
+          default = config.vim.languages.enableTreesitter;
+          defaultText = literalExpression "config.vim.languages.enableTreesitter";
+        };
+      package = mkGrammarOption pkgs "liquid";
+    };
+    # TODO: if curlylint gets packaged for nix, add it.
+  };
+
+  config = mkIf cfg.enable (mkMerge [
+    (mkIf cfg.treesitter.enable {
+      vim.treesitter.enable = true;
+      vim.treesitter.grammars = [cfg.treesitter.package];
+    })
+  ]);
+}