GNU bug report logs - #55166
28.1; tar-mode doesn't re-compress when saving remote files

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Message #8 received at 55166 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Dan McCarthy <daniel.c.mccarthy <at> gmail.com>
Cc: 55166 <at> debbugs.gnu.org, Michael Albinus <michael.albinus <at> gmx.de>
Subject: Re: bug#55166: 28.1; tar-mode doesn't re-compress when saving
 remote files
Date: Thu, 28 Apr 2022 20:49:13 +0200

Dan McCarthy <daniel.c.mccarthy <at> gmail.com> writes:

> dan <at> solstice:/tmp$ touch a b c
> dan <at> solstice:/tmp$ tar cf test.tar a b c
> dan <at> solstice:/tmp$ bzip2 -z test.tar 
> dan <at> solstice:/tmp$ file test.tar.bz2 
> test.tar.bz2: bzip2 compressed data, block size = 900k
>
> If you visit that remote file and save it, the result will have the .bz2
> extension but won't actually be compressed:
>
> dan <at> solstice:/tmp$ file test.tar.bz2 
> test.tar.bz2: POSIX tar archive (GNU)
>
> This doesn't happen with compressed remote files which aren't tar archives.

I can reproduce this problem with Emacs 29, too.  (And if I edit the
file locally instead of via tramp, the tar file is saved compressed, so
it seems to be tramp-related.)

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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