languages/go: add injections for gotmpl

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

@@ -104,6 +104,10 @@
 
 - Renamed `languages.ts` to `languages.typescript`.
 
+- Added {option}`vim.languages.go.treesitter.gotmpl.injection` and Renamed
+  `languages.go.treesitter.gotmplPackage` to
+  {option}`vim.languages.go.treesitter.gotmpl.package`
+
 ## Changelog {#sec-release-0-9-changelog}
 
 [SecBear](https://github.com/SecBear):

modules/extra/deprecations.nix

@@ -362,6 +362,7 @@ in {
     # 2026-04-19
     [
       (mkRenamedOptionModule ["vim" "utility" "vim-wakatime" "cli-path"] ["vim" "utility" "vim-wakatime" "setupOpts" "cli_path"])
+      (mkRenamedOptionModule ["vim" "languages" "go" "treesitter" "gotmplPackage"] ["vim" "languages" "go" "treesitter" "gotmpl" "package"])
     ]
   ];
 }

modules/plugins/languages/go.nix

@@ -143,7 +143,14 @@ in {
       gomodPackage = mkGrammarOption pkgs "gomod";
       gosumPackage = mkGrammarOption pkgs "gosum";
       goworkPackage = mkGrammarOption pkgs "gowork";
-      gotmplPackage = mkGrammarOption pkgs "gotmpl";
+      gotmpl = {
+        package = mkGrammarOption pkgs "gotmpl";
+        injection = mkOption {
+          type = str;
+          default = "html";
+          description = "Treesitter language to inject in Go templates";
+        };
+      };
     };
 
     lsp = {
@@ -274,7 +281,21 @@ in {
           cfg.treesitter.gomodPackage
           cfg.treesitter.gosumPackage
           cfg.treesitter.goworkPackage
-          cfg.treesitter.gotmplPackage
+          cfg.treesitter.gotmpl.package
+        ];
+        queries = [
+          {
+            type = "injections";
+            filetypes = ["gotmpl"];
+            content = ''
+              ;; extends
+
+              ((text) @injection.content
+                (#set! injection.language "${cfg.treesitter.gotmpl.injection}")
+                (#set! injection.combined)
+              )
+            '';
+          }
         ];
       };
     })