GNU bug report logs - #18883
24.4; auto-revert-mode with notify doesn't work with symlinked directories

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

From: Stefan Dorn <mail <at> muflax.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.4;
 auto-revert-mode with notify doesn't work with symlinked directories
Date: Wed, 29 Oct 2014 13:44:50 +0000

auto-revert-mode doesn't work for files that are in symlinked
directories, even if the file itself is a normal file.

auto-revert-mode watches files based on (buffer-file-name), but
notify will only return events for the file's real path.

Currently, auto-revert-mode doesn't use file-notify if the file itself is a
symlink, which seems like a workaround for the same problem.
auto-revert-mode should probably watch files based on (file-truename)
instead, which seems to me like it would fix both problems.

(As a workaround, I just disabled auto-revert-use-notify for now.)



In GNU Emacs 24.4.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.24)
 of 2014-10-24 on scabeiathrax
Windowing system distributor `The X.Org Foundation', version 11.0.11601000
System Description:	Gentoo Base System release 2.2

Configured using:
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 --with-crt-dir=/nix/store/i11d0d4015p0vbdnjq7lb509v9pwp049-glibc-2.19/lib'

Important settings:
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Major mode: EL

Minor modes in effect:
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<left> <left> <left> <left> <up> C-h f <return> <up> 
<up> C-n C-n C-n <up> <up> <return> ( <backspace> <backspace> 
<down> <down> <down> <down> <down> C-x C-s C-n C-n 
C-n C-n C-n q C-n q C-n C-r SPC <down> <down> <down> 
<down> <down> <down> C-x SPC SPC <down> <down> <right> 
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<right> C-x SPC SPC <right> <right> <right> <right> 
<right> <right> <right> <right> <right> <right> <right> 
<right> C-h f <return> <switch-frame> <switch-frame> 
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<tab> s c c p o i n t l e s s SPC a b b r e v SPC u 
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<left> <left> S-SPC C-f C-f C-f M-x C-g M-w M-x r e 
p o r t b <return>

Recent messages:
Wrote /home/amon/.emacs.d/cache/undo/.!home!amon!src!emacs!config!.git!COMMIT_EDITMSG.~undo-tree~
Wrote /home/amon/src/emacs/config/.git/COMMIT_EDITMSG
Git finished
Type a prefix key to toggle it. Run 'actions' with their prefixes. '?' for more help.
Running git push -v origin master:refs/heads/master
Git finished
Type <right> to expand again, <left> to contract, SPC to reset
Quit
Mark set
Quit

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Message #8 received at 18883 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Stefan Dorn <mail <at> muflax.com>
Cc: 18883 <at> debbugs.gnu.org
Subject: Re: bug#18883: 24.4;
 auto-revert-mode with notify doesn't work with symlinked directories
Date: Wed, 29 Oct 2014 10:11:20 -0400

> auto-revert-mode watches files based on (buffer-file-name), but
> notify will only return events for the file's real path.

IIUC one way to solve this is to change auto-revert's notification
handler so it doesn't pay attention to the directory and only compares
the relative file name (after all, the hash-table should already make
sure the directories match).


        Stefan

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