emacs - "Diff, save or kill"在 Emacs 中杀死缓冲区时

Question

当试图杀死包含 Emacs 更改的缓冲区时，消息:
显示“缓冲区 [缓冲区] 已修改；仍然杀死？(是或否)”。

而不是这个，我想让 Emacs 问我是否想:
1.查看变化的差异，
2.保存缓冲区，
3. 杀死缓冲区。

如何？

Answer 1

答案在于使用 advice , 因为在终止缓冲区运行时钩子(Hook)通常会运行 之后 您要更改的“缓冲区已修改”提示。

以下建议可以满足您的要求(我认为)。几点注意事项:

运行差异时，原始缓冲区被标记为未修改 - 但您确实需要保存它。

diff 中的另一个缓冲区不会被删除

(defadvice kill-buffer (around my-kill-buffer-check activate)
  "Prompt when a buffer is about to be killed."
  (let* ((buffer-file-name (buffer-file-name))
         backup-file)
    ;; see 'backup-buffer
    (if (and (buffer-modified-p)
             buffer-file-name
             (file-exists-p buffer-file-name)
             (setq backup-file (car (find-backup-file-name buffer-file-name))))
        (let ((answer (completing-read (format "Buffer modified %s, (d)iff, (s)ave, (k)ill? " (buffer-name))
                                       '("d" "s" "k") nil t)))
          (cond ((equal answer "d")
                 (set-buffer-modified-p nil)
                 (let ((orig-buffer (current-buffer))
                       (file-to-diff (if (file-newer-than-file-p buffer-file-name backup-file)
                                         buffer-file-name
                                       backup-file)))
                   (set-buffer (get-buffer-create (format "%s last-revision" (file-name-nondirectory file-to-diff))))
                   (buffer-disable-undo)
                   (insert-file-contents file-to-diff nil nil nil t)
                   (set-buffer-modified-p nil)
                   (setq buffer-read-only t)
                   (ediff-buffers (current-buffer) orig-buffer)))
                ((equal answer "k")
                 (set-buffer-modified-p nil)
                 ad-do-it)
                (t
                 (save-buffer)
                 ad-do-it)))
      ad-do-it)))