Subject: bug#65904: 29.1.50; autorevert can't revert files in a symlink directory

From: zhanghj <[email-masked]>
Date: Wed, 13 Sep 2023 21:12:30 +0800

Do you mean that the test file itself is a symlink file?

In my case, the test file itself is a normal file. But its parent 
directory is a symlink.

I just tested:  'file-symlink-p' return nil for the test file.

On 9/13/23 20:56, Eli Zaretskii wrote:
>> From: Zhang Haijun <[email-masked]>
>> Date: Wed, 13 Sep 2023 03:55:15 +0000
>>
>>
>> It works in Emacs 26/27, But it doesn't work in Emacs 29.
>>
>> 0. emacs -Q
>> 1. use the following code to open an existing file in a symlink directory
>> (progn
>>    (setq auto-revert-use-notify t
>>             auto-revert-interval 3)
>>    (global-auto-revert-mode 1)
>>    (setq find-file-hook (delq 'vc-refresh-state find-file-hook))
>>    (find-file "~/symlink_dir/test.txt"))
>>
>> 2. modify the test file in external program and save
>> 3. emacs doesn't autorevert the file
> AFAICT, we don't support autoreverting symlinks, since Dec 2013, so it
> sounds strange that you say it worked in Emacs 27.
>
> The relevant discussion is here:
>
>    https://lists.gnu.org/archive/html/emacs-devel/2013-12/msg00282.html
>
> The reason for this non-support seems to be performance.
>
> I hope Michael (CC'ed) will be able to tell more about this.
>
> A workaround is to set auto-revert-use-notify to nil.