GNU bug report logs - #57816
28.2; Renaming a help buffer from help-mode-hook

Previous Next

To add a comment to this bug, you must first unarchive it, by sending
a message to control AT debbugs.gnu.org, with unarchive 57816 in the body.
You can then email your comments to 57816 AT debbugs.gnu.org in the normal way.

Toggle the display of automated, internal messages from the tracker.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Damien Cassou <damien <at> cassou.me>
To: bug-gnu-emacs <at> gnu.org
Subject: 28.2; Renaming a help buffer from help-mode-hook
Date: Thu, 15 Sep 2022 06:43:25 +0200

In GNU Emacs 28.2, I would like to automatically rename help buffers so
their name reflect their content. For example, I want *Help: car*
instead of just *Help* for the help buffer of `car'. Unfortunately,
adding #'rename-buffer to `help-mode-hook' doesn't work as this results
in 2 buffers instead of just one:

  emacs --batch -Q \
    --eval "(add-hook 'help-mode-hook (lambda () (rename-buffer \"*foo*\")))" \
    --eval "(describe-function #'describe-function)" \
    --eval "(prin1 (cons (get-buffer \"*Help*\") (get-buffer \"*foo*\")))"

prints

  (#<buffer *Help*> . #<buffer *foo*>)

After the "rename", there is still a buffer with the old name. Is there
a more correct way to do this?

Best

-- 
Damien Cassou

"Success is the ability to go from one failure to another without
losing enthusiasm." --Winston Churchill

Message #8 received at 57816 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Damien Cassou <damien <at> cassou.me>
Cc: 57816 <at> debbugs.gnu.org
Subject: Re: bug#57816: 28.2; Renaming a help buffer from help-mode-hook
Date: Fri, 16 Sep 2022 13:51:26 +0200

Damien Cassou <damien <at> cassou.me> writes:

> In GNU Emacs 28.2, I would like to automatically rename help buffers so
> their name reflect their content. For example, I want *Help: car*
> instead of just *Help* for the help buffer of `car'. Unfortunately,
> adding #'rename-buffer to `help-mode-hook' doesn't work as this results
> in 2 buffers instead of just one:
>
>   emacs --batch -Q \
>     --eval "(add-hook 'help-mode-hook (lambda () (rename-buffer \"*foo*\")))" \
>     --eval "(describe-function #'describe-function)" \
>     --eval "(prin1 (cons (get-buffer \"*Help*\") (get-buffer \"*foo*\")))"
>
> prints
>
>   (#<buffer *Help*> . #<buffer *foo*>)
>
> After the "rename", there is still a buffer with the old name. Is there
> a more correct way to do this?

I can reproduce this in Emacs 28.2, but not in Emacs 29, so it looks
like this has been fixed already.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.