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bug#11605: 24.1.50; vc-ediff revert annoyance


From: Lars Ingebrigtsen
Subject: bug#11605: 24.1.50; vc-ediff revert annoyance
Date: Wed, 24 Feb 2016 17:33:44 +1100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (gnu/linux)

William Xu <address@hidden> writes:

>   1. emacs -Q
>   2. visit a version controlled file, say `foo'.
>   3. M-x vc-ediff, run it couple of times.
>
> You will see this annoying message many times:
>
>   File foo.~master~ changed on disk.  Reread from disk? (yes or no)

I can confirm that this bug is still present in the Emacs trunk.

> The reason is the ~master~ file is checked out everytime we run
> vc-ediff, and after ediff session, the ~master~ buffer is always left
> there, hence, when running vc-ediff multiple times it constantly asks
> you whether you want to revert.  Why not let it revert automatically?
>
> How about this patch?

[...]

I think the patch sounds reasonable, but the vc machinery is something
with which I'm not overly familiar.

Could somebody take a peek at this patch?

> From d2af0f4dcc81b39d9360135244d6870388a264a3 Mon Sep 17 00:00:00 2001
> From: William Xu <address@hidden>
> Date: Sat, 2 Jun 2012 12:16:45 +0800
> Subject: [PATCH] (vc-find-revision): Auto revert file revision buffer
>  quietly.
>
> ---
>  lisp/vc/vc.el |    6 ++++--
>  1 files changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/lisp/vc/vc.el b/lisp/vc/vc.el
> index 87e4e1c..bd337d0 100644
> --- a/lisp/vc/vc.el
> +++ b/lisp/vc/vc.el
> @@ -1815,11 +1815,13 @@ Use BACKEND as the VC backend if specified."
>               (delete-file filename))))
>         (vc-mode-line file))
>       (message "Checking out %s...done" filename)))
> -    (let ((result-buf (find-file-noselect filename)))
> +    (let ((result-buf (or (get-file-buffer filename)
> +                          (find-file-noselect filename))))
>        (with-current-buffer result-buf
>       ;; Set the parent buffer so that things like
>       ;; C-x v g, C-x v l, ... etc work.
> -     (set (make-local-variable 'vc-parent-buffer) filebuf))
> +     (set (make-local-variable 'vc-parent-buffer) filebuf)
> +        (revert-buffer nil t))
>        result-buf)))
>  
>  ;; Header-insertion code

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no





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