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bug#28843: 26.0.90; gnus kills unsaved message buffer


From: Eric Abrahamsen
Subject: bug#28843: 26.0.90; gnus kills unsaved message buffer
Date: Tue, 07 Nov 2017 18:41:24 -0800
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.90 (gnu/linux)

Nick Helm <nick@tenpoint.co.nz> writes:

> On Thu, 26 Oct 2017 at 13:52:13 +1300, Nick Helm wrote:
>
>> On Sun, 15 Oct 2017 at 20:46:25 +1300, Nick Helm wrote:
>>
>>> Gnus exits, and the unsaved message buffer dies with it, without prompts
>>> to save.
>>
>> It seems the behaviour is intentional ... This commit changed
>> `gnus-clear-system' to include this:
>>
>>   #+begin_src emacs-lisp
>>   ;; Kill Gnus buffers.
>>   (do-auto-save t)
>>   (dolist (buffer (gnus-buffers))
>>     (when (gnus-buffer-exists-p buffer)
>>       (with-current-buffer buffer
>>         (set-buffer-modified-p nil)
>>         (when (local-variable-p 'kill-buffer-hook)
>>           (setq kill-buffer-hook nil))))
>>     (gnus-kill-buffer buffer))
>>   #+end_src
>>
>> So gnus is at least auto-saving draft messages before zapping them.
>>
>> Is there a better way to do this though? I think the user should at
>> least have some warning that an unsaved buffer is about to be
>> automatically killed.
>
> One solution (though not a very good one IMHO) would be to make the
> auto-save depend on the user's value of guns-interactive-exit. For
> example:
>
> --- a/lisp/gnus/gnus-start.el 2017-10-26 12:49:43.000000000 +1300
> +++ b/lisp/gnus/gnus-start.el 2017-10-26 12:45:12.000000000 +1300
> @@ -731,11 +731,12 @@
>      (kill-buffer (get-file-buffer (gnus-newsgroup-kill-file nil))))
>    (gnus-kill-buffer nntp-server-buffer)
>    ;; Kill Gnus buffers.
> -  (do-auto-save t)
>    (dolist (buffer (gnus-buffers))
>      (when (gnus-buffer-exists-p buffer)
>        (with-current-buffer buffer
> -     (set-buffer-modified-p nil)
> +        (unless gnus-interactive-exit
> +          (do-auto-save t t)
> +     (set-buffer-modified-p nil))
>       (when (local-variable-p 'kill-buffer-hook)
>         (setq kill-buffer-hook nil))))
>      (gnus-kill-buffer buffer))

We could also consider mirroring the behavior of Emacs itself: if
`gnus-interactive-exit' is non-nil, prompt the user whether to save
changed buffers or not.





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