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Re: Offering the differences on exit
From: |
Kim F. Storm |
Subject: |
Re: Offering the differences on exit |
Date: |
02 Jul 2002 22:47:09 +0200 |
User-agent: |
Gnus/5.09 (Gnus v5.9.0) Emacs/21.3.50 |
Mario Lang <address@hidden> writes:
> One feature I miss since I tried out Emacs the first time
> is the ability to see a diff when you are asked if you want to
> save changed you've made.
I agree this would be extremely useful.
However, I would prefer if this was built-in as a default option in
save-some-buffers.
In that case, I don't see a great need for the more general approach
you have taken with the save-some-buffers-action-alist (although it
might have other uses).
The following function may be useful here (it doesn't
use a temp file, but maybe that's not portable diff
behaviour):
(defun diff-buffer-to-visited-file (&optional buffer)
(interactive "bBuffer: ")
(setq buffer (get-buffer (or buffer (current-buffer))))
(let ((file (buffer-file-name buffer)))
(if file
(with-current-buffer buffer
(save-restriction
(widen)
(shell-command-on-region (point-min) (point-max)
(concat "diff -c " file " -"))))
(message "No file is associated with buffer"))))
--
Kim F. Storm <address@hidden> http://www.cua.dk