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bug#11412: 24.0.95; auto-revert-mode doesn't revert buffer when file bec
From: |
Lars Ingebrigtsen |
Subject: |
bug#11412: 24.0.95; auto-revert-mode doesn't revert buffer when file becomes writeable |
Date: |
Wed, 02 Jun 2021 08:24:02 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
Barry OReilly <gundaetiapo@gmail.com> writes:
> Open foo.py in Emacs.
>
> In a terminal:
> chmod u+w foo.py
>
> Wait several seconds, inserting text yields error:
> Buffer is read-only: #<buffer foo.py>
(I'm going through old bug reports that unfortunately got no response at
the time.)
This has been fixed in the years since this was reported.
> Open foo.py with vim and add text:
> # aaa blah
> # bbb
>
> The blah string appears in Emacs. Insertion still fails with error:
> Buffer is read-only: #<buffer foo.py>
>
> Do: M-x revert-buffer
>
> Insertion now works.
This is apparently a feature added in 2004:
commit 90e118abf2dcc4aca4d7a7642247fa488554351e
Author: Luc Teirlinck <teirllm@auburn.edu>
AuthorDate: Fri Sep 3 22:28:10 2004 +0000
;; Bind buffer-read-only in case user has done C-x C-q, so as
;; not to forget that. This gives undesirable results when
;; the file's mode changes, but that is less common.
(let ((buffer-read-only buffer-read-only))
...
(revert-buffer 'ignore-auto 'dont-ask 'preserve-modes))))
So auto-reversion doesn't touch the buffer-readedness in case the user
has set it manually. So I'm not sure whether we should change this
behaviour here. Anybody got an opinion?
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
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