feat(yaml): add treesit support

modules/lang/yaml/README.org

@@ -11,8 +11,8 @@ This module provides support for the [[https://yaml.org/][YAML file format]] to
 
 ** Module flags
 - +lsp ::
-  Enable LSP support for ~yaml-mode~. Requires [[doom-module::tools lsp]] and a langserver
-  (supports [[https://github.com/redhat-developer/yaml-language-server][yaml-language-server]]).
+  Enable LSP support for ~yaml-mode~. Requires [[doom-module::tools lsp]] and a
+  langserver (supports [[https://github.com/redhat-developer/yaml-language-server][yaml-language-server]]).
 - +tree-sitter ::
   Leverages tree-sitter for better syntax highlighting and structural text
   editing. Requires [[doom-module::tools tree-sitter]].

modules/lang/yaml/config.el

@@ -2,10 +2,22 @@
 
 (use-package! yaml-mode
   :mode "Procfile\\'"
-  :init
+  :config
   (when (modulep! +lsp)
     (add-hook 'yaml-mode-local-vars-hook #'lsp! 'append))
-  (when (modulep! +tree-sitter)
-    (add-hook 'yaml-mode-local-vars-hook #'tree-sitter! 'append))
-  :config
   (setq-hook! 'yaml-mode-hook tab-width yaml-indent-offset))
+
+
+(use-package! yaml-ts-mode
+  :when (modulep! +tree-sitter)
+  :when (fboundp 'yaml-ts-mode) ; 29.1+ only
+  :init
+  (set-tree-sitter! 'yaml-mode 'yaml-ts-mode
+    '((yaml :url "https://github.com/tree-sitter-grammars/tree-sitter-yaml"
+            :rev "v0.7.0")))
+  :config
+  ;; HACK: Rely on `major-mode-remap-defaults'.
+  (cl-callf2 rassq-delete-all 'yaml-ts-mode auto-mode-alist)
+
+  (when (modulep! +lsp)
+    (add-hook 'yaml-ts-mode-local-vars-hook #'lsp! 'append)))

modules/lang/yaml/doctor.el

@@ -0,0 +1,9 @@
+;;; lang/yaml/doctor.el -*- lexical-binding: t; -*-
+
+(assert! (or (not (modulep! +lsp))
+             (modulep! :tools lsp))
+         "This module requires (:tools lsp)")
+
+(assert! (or (not (modulep! +tree-sitter))
+             (modulep! :tools tree-sitter))
+         "This module requires (:tools tree-sitter)")