feat: preview markdown files via mdopen or grip

lisp/init-markdown.el

@@ -98,8 +98,8 @@ mermaid.initialize({
  (funcall fn)))
  (advice-add #'markdown-export-and-preview :around #'my-markdown-export-and-preview))
 
- ;; Preview via `grip'
- ;; Install: pip install grip
+ ;; Preview markdown files
+ ;; @see: https://github.com/seagle0128/grip-mode?tab=readme-ov-file#prerequisite
  (use-package grip-mode
  :defines org-mode-map
  :functions auth-source-user-and-password
@@ -110,10 +110,14 @@ mermaid.initialize({
  (bind-key "C-c C-g" #'grip-mode org-mode-map))
 
  (setq grip-update-after-change nil)
- (when-let ((credential (and (require 'auth-source nil t)
- (auth-source-user-and-password "api.github.com"))))
- (setq grip-github-user (car credential)
- grip-github-password (cadr credential))))
+
+ ;; mdopen doesn't need credentials, and only support external browsers
+ (if (executable-find "mdopen")
+ (setq grip-use-mdopen t)
+ (when-let ((credential (and (require 'auth-source nil t)
+ (auth-source-user-and-password "api.github.com"))))
+ (setq grip-github-user (car credential)
+ grip-github-password (cadr credential)))))
 
  ;; Table of contents
  (use-package markdown-toc