feat(emacs-tree-sitter-move): load more than one tree sitter grammar

Change-Id: I43b8ddb180c056f1b8c650ccc915ec41bae83960
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2262
Reviewed-by: Profpatsch <mail@profpatsch.de>
Tested-by: BuildkiteCI

users/Profpatsch/emacs-tree-sitter-move/tmp.el

@@ -1,14 +1,28 @@
-(tree-sitter-load
- 'python
- (format "%s/bin/python"
-         (getenv "TREE_SITTER_GRAMMAR_DIR")))
+(defun tree-sitter-load-from-grammar-dir (grammar-dir sym lang-name)
+  (tree-sitter-load
+   sym
+   (format "%s/bin/%s"
+           (getenv grammar-dir)
+           lang-name)))
+
+(defun tree-sitter-init-tmp-langs (alist)
+  (mapcar
+   (lambda (lang)
+     (pcase-let ((`(,name ,sym ,mode) lang))
+       (tree-sitter-load-from-grammar-dir "TREE_SITTER_GRAMMAR_DIR" sym name)
+       (cons mode sym)))
+   alist))
+
 
 (setq tree-sitter-major-mode-language-alist
-      '((python-mode . python)))
-
+      (tree-sitter-init-tmp-langs
+       '(("python" python python-mode)
+         ("json" json js-mode)
+         ("bash" bash sh-mode)
+         )))
 
 (define-key evil-normal-state-map (kbd "C-.") #'tree-sitter-move-reset)
 (define-key evil-normal-state-map (kbd "C-<right>") #'tree-sitter-move-right)
 (define-key evil-normal-state-map (kbd "C-<left>") #'tree-sitter-move-left)
-(define-key evil-normal-state-map (kbd "C-<up>") 'tree-sitter-move-up)
-(define-key evil-normal-state-map (kbd "C-<down>") 'tree-sitter-move-down)
+(define-key evil-normal-state-map (kbd "C-<up>") #'tree-sitter-move-up)
+(define-key evil-normal-state-map (kbd "C-<down>") #'tree-sitter-move-down)

users/Profpatsch/emacs-tree-sitter-move/tree-sitter-move.el

@@ -15,6 +15,7 @@
 (defun tree-sitter-move--setup ()
   ;; TODO
   (progn
+    ;; TODO: if tree-sitter-mode fails to load, display a better error
     (tree-sitter-mode t)
     (setq tree-sitter-move--cursor (tsc-root-node tree-sitter-tree))
     (add-variable-watcher