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Re: Offering the differences on exit
From: |
Mario Lang |
Subject: |
Re: Offering the differences on exit |
Date: |
Tue, 02 Jul 2002 22:25:47 +0200 |
User-agent: |
Gnus/5.090007 (Oort Gnus v0.07) Emacs/21.2 (i386-debian-linux-gnu) |
address@hidden (Kim F. Storm) writes:
> 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).
I figure people might want to use ediff instead of external diff.
Also, when diff is available, I would like to remove C-r, as I never
used it really before.
> The following function may be useful here (it doesn't
> use a temp file, but maybe that's not portable diff
> behaviour):
shell-command-on-region uses make-tempfile AFAICS.
> (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 " -"))))
If it went as a built-in into emacs I'd prefer to be able to configure
the diff options. Either use vc-cvs-diff-switches, or
ediff-custom-diff-options or some other variable.
> (message "No file is associated with buffer"))))
--
CYa,
Mario