diff options
Diffstat (limited to 'lisp/loadhist.el')
| -rw-r--r-- | lisp/loadhist.el | 99 |
1 files changed, 64 insertions, 35 deletions
diff --git a/lisp/loadhist.el b/lisp/loadhist.el index 28d0b18c812..693050d7044 100644 --- a/lisp/loadhist.el +++ b/lisp/loadhist.el @@ -162,6 +162,69 @@ documentation of `unload-feature' for details.") ;; mode, or proposed is not nil and not major-mode, and so we use it. (funcall (or proposed 'fundamental-mode))))))) +(cl-defgeneric loadhist-unload-element (x) + "Unload an element from the `load-history'." + (message "Unexpected element %S in load-history" x)) + +;; In `load-history', the definition of a previously autoloaded +;; function is represented by 2 entries: (t . SYMBOL) comes before +;; (defun . SYMBOL) and says we should restore SYMBOL's autoload when +;; we undefine it. +;; So we use this auxiliary variable to keep track of the last (t . SYMBOL) +;; that occurred. +(defvar loadhist--restore-autoload + "If non-nil, this is a symbol for which we should +restore a previous autoload if possible.") + +(cl-defmethod loadhist-unload-element ((x (head t))) + (setq loadhist--restore-autoload (cdr x))) + +(defun loadhist--unload-function (x) + (let ((fun (cdr x))) + (when (fboundp fun) + (when (fboundp 'ad-unadvise) + (ad-unadvise fun)) + (let ((aload (get fun 'autoload))) + (defalias fun + (if (and aload (eq fun loadhist--restore-autoload)) + (cons 'autoload aload) + nil))))) + (setq loadhist--restore-autoload nil)) + +(cl-defmethod loadhist-unload-element ((x (head defun))) + (loadhist--unload-function x)) +(cl-defmethod loadhist-unload-element ((x (head autoload))) + (loadhist--unload-function x)) + +(cl-defmethod loadhist-unload-element ((x (head require))) nil) +(cl-defmethod loadhist-unload-element ((x (head defface))) nil) +;; The following two might require more actions. +(cl-defmethod loadhist-unload-element ((x (head ert-deftest))) nil) +(cl-defmethod loadhist-unload-element ((x (head cl-defmethod))) nil) + +(cl-defmethod loadhist-unload-element ((x (head provide))) + ;; Remove any feature names that this file provided. + (setq features (delq (cdr x) features))) + +(cl-defmethod loadhist-unload-element ((x symbol)) + ;; Kill local values as much as possible. + (dolist (buf (buffer-list)) + (with-current-buffer buf + (if (and (boundp x) (timerp (symbol-value x))) + (cancel-timer (symbol-value x))) + (kill-local-variable x))) + (if (and (boundp x) (timerp (symbol-value x))) + (cancel-timer (symbol-value x))) + ;; Get rid of the default binding if we can. + (unless (local-variable-if-set-p x) + (makunbound x))) + +(cl-defmethod loadhist-unload-element ((x (head define-type))) + (let* ((name (cdr x)) + (slots (mapcar 'car (cdr (cl-struct-slot-info name))))) + ;; Remove the struct. + (setf (cl--find-class name) nil))) + ;;;###autoload (defun unload-feature (feature &optional force) "Unload the library that provided FEATURE. @@ -200,9 +263,6 @@ something strange, such as redefining an Emacs function." (prin1-to-string dependents) file)))) (let* ((unload-function-defs-list (feature-symbols feature)) (file (pop unload-function-defs-list)) - ;; If non-nil, this is a symbol for which we should - ;; restore a previous autoload if possible. - restore-autoload (name (symbol-name feature)) (unload-hook (intern-soft (concat name "-unload-hook"))) (unload-func (intern-soft (concat name "-unload-function")))) @@ -250,38 +310,7 @@ something strange, such as redefining an Emacs function." (when (symbolp elt) (elp-restore-function elt)))) - (dolist (x unload-function-defs-list) - (if (consp x) - (pcase (car x) - ;; Remove any feature names that this file provided. - (`provide - (setq features (delq (cdr x) features))) - ((or `defun `autoload) - (let ((fun (cdr x))) - (when (fboundp fun) - (when (fboundp 'ad-unadvise) - (ad-unadvise fun)) - (let ((aload (get fun 'autoload))) - (if (and aload (eq fun restore-autoload)) - (fset fun (cons 'autoload aload)) - (fmakunbound fun)))))) - ;; (t . SYMBOL) comes before (defun . SYMBOL) - ;; and says we should restore SYMBOL's autoload - ;; when we undefine it. - (`t (setq restore-autoload (cdr x))) - ((or `require `defface) nil) - (_ (message "Unexpected element %s in load-history" x))) - ;; Kill local values as much as possible. - (dolist (buf (buffer-list)) - (with-current-buffer buf - (if (and (boundp x) (timerp (symbol-value x))) - (cancel-timer (symbol-value x))) - (kill-local-variable x))) - (if (and (boundp x) (timerp (symbol-value x))) - (cancel-timer (symbol-value x))) - ;; Get rid of the default binding if we can. - (unless (local-variable-if-set-p x) - (makunbound x)))) + (mapc #'loadhist-unload-element unload-function-defs-list) ;; Delete the load-history element for this file. (setq load-history (delq (assoc file load-history) load-history)))) ;; Don't return load-history, it is not useful. |