feat(emacs-lisp,lispy): recognize ;;* outline headings

Permit `;;* ...` be recognized by imenu and outline-minor-mode (and
outline's commands). This also patches Lispy to reflect this new
configuration (if :lang emacs-lisp is active).

Close: #6732
Co-authored-by: LemonBreezes <LemonBreezes@users.noreply.github.com>

modules/editor/lispy/config.el

@@ -22,7 +22,15 @@
       (local-set-key (vector 'remap (lookup-key lispy-mode-map (kbd "TAB"))) #'completion-at-point)))
   :config
   (setq lispy-close-quotes-at-end-p t)
-  (add-hook 'lispy-mode-hook #'turn-off-smartparens-mode))
+  (add-hook 'lispy-mode-hook #'turn-off-smartparens-mode)
+
+  (when (modulep! :lang emacs-lisp)
+    (setq lispy-outline
+          (concat
+           ;; `lispy-mode' requires `lispy-outline' start with ^
+           (unless (string-prefix-p "^" +emacs-lisp-outline-regexp) "^")
+           +emacs-lisp-outline-regexp))
+    (advice-add #'lispy-outline-level :override #'+emacs-lisp-outline-level)))
 
 
 (use-package! lispyville

modules/lang/emacs-lisp/autoload.el

@@ -28,6 +28,12 @@ to a pop up buffer."
         (kill-buffer buffer))))
    (current-buffer)))
 
+;;;###autoload
+(defun +emacs-lisp-outline-level ()
+  "Return outline level for comment at point.
+Intended to replace `lisp-outline-level'."
+  (- (match-end 1) (match-beginning 1)))
+
 
 ;;
 ;;; Handlers
@@ -232,7 +238,7 @@ https://emacs.stackexchange.com/questions/10230/how-to-indent-keywords-aligned"
 (defun +emacs-lisp-extend-imenu-h ()
   "Improve imenu support in `emacs-lisp-mode' for Doom's APIs."
   (setq imenu-generic-expression
-        `(("Section" "^[ \t]*;;;;*[ \t]+\\([^\n]+\\)" 1)
+        `(("Section" "^[ \t]*;;;*\\**[ \t]+\\([^\n]+\\)" 1)
           ("Evil commands" "^\\s-*(evil-define-\\(?:command\\|operator\\|motion\\) +\\(\\_<[^ ()\n]+\\_>\\)" 1)
           ("Unit tests" "^\\s-*(\\(?:ert-deftest\\|describe\\) +\"\\([^\")]+\\)\"" 1)
           ("Package" "^\\s-*\\(?:;;;###package\\|(\\(?:package!\\|use-package!?\\|after!\\)\\) +\\(\\_<[^ ()\n]+\\_>\\)" 1)

modules/lang/emacs-lisp/config.el

@@ -3,7 +3,7 @@
 (defvar +emacs-lisp-enable-extra-fontification t
   "If non-nil, highlight special forms, and defined functions and variables.")
 
-(defvar +emacs-lisp-outline-regexp "[ \t]*;;;;* [^ \t\n]"
+(defvar +emacs-lisp-outline-regexp "[ \t]*;;;\\(;*\\**\\) [^ \t\n]"
   "Regexp to use for `outline-regexp' in `emacs-lisp-mode'.
 This marks a foldable marker for `outline-minor-mode' in elisp buffers.")
 
@@ -60,7 +60,8 @@ See `+emacs-lisp-non-package-mode' for details.")
     mode-name "Elisp"
     ;; Don't treat autoloads or sexp openers as outline headers, we have
     ;; hideshow for that.
-    outline-regexp +emacs-lisp-outline-regexp)
+    outline-regexp +emacs-lisp-outline-regexp
+    outline-level #'+emacs-lisp-outline-level)
 
   ;; Fixed indenter that intends plists sensibly.
   (advice-add #'calculate-lisp-indent :override #'+emacs-lisp--calculate-lisp-indent-a)