#26734 - Snippets (even empty ones) of tar sources reset the timestamps of all files

Package	Source(s)		Maintainer(s)
guix		PTS Buildd Popcon

Message #17 received at 26734@debbugs.gnu.org (full text, mbox, reply):

Received: (at 26734) by debbugs.gnu.org; 3 May 2017 21:45:39 +0000
From debbugs-submit-bounces@debbugs.gnu.org Wed May 03 17:45:39 2017
Received: from localhost ([127.0.0.1]:53278 helo=debbugs.gnu.org)
	by debbugs.gnu.org with esmtp (Exim 4.84_2)
	(envelope-from <debbugs-submit-bounces@debbugs.gnu.org>)
	id 1d625b-0006AX-L3
	for submit@debbugs.gnu.org; Wed, 03 May 2017 17:45:39 -0400
Received: from world.peace.net ([50.252.239.5]:44901)
 by debbugs.gnu.org with esmtp (Exim 4.84_2)
 (envelope-from <mhw@netris.org>) id 1d625Z-0006AK-V9
 for 26734@debbugs.gnu.org; Wed, 03 May 2017 17:45:38 -0400
Received: from pool-72-93-31-169.bstnma.east.verizon.net ([72.93.31.169]
 helo=jojen)
 by world.peace.net with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
 (Exim 4.84_2) (envelope-from <mhw@netris.org>)
 id 1d625U-0003AV-0K; Wed, 03 May 2017 17:45:32 -0400
From: Mark H Weaver <mhw@netris.org>
To: ludo@gnu.org (Ludovic Courtès)
Subject: Re: bug#26734: Snippets (even empty ones) of tar sources reset the
 timestamps of all files
References: <874lx4d6j7.fsf@lassieur.org> <87h913h0rj.fsf@gnu.org>
 <87d1brmm8m.fsf@lassieur.org> <87fugmxqng.fsf@gnu.org>
Date: Wed, 03 May 2017 17:45:20 -0400
In-Reply-To: <87fugmxqng.fsf@gnu.org> ("Ludovic
 \=\?utf-8\?Q\?Court\=C3\=A8s\=22'\?\=
 \=\?utf-8\?Q\?s\?\= message of "Wed, 03 May 2017 10:58:59 +0200")
Message-ID: <87r305iphr.fsf@netris.org>
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux)
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
X-Spam-Score: 0.0 (/)
X-Debbugs-Envelope-To: 26734
Cc: 26734@debbugs.gnu.org,
 Clément Lassieur <clement@lassieur.org>
X-BeenThere: debbugs-submit@debbugs.gnu.org
X-Mailman-Version: 2.1.18
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, 
 <mailto:debbugs-submit-request@debbugs.gnu.org?subject=unsubscribe>
List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/>
List-Post: <mailto:debbugs-submit@debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request@debbugs.gnu.org?subject=help>
List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, 
 <mailto:debbugs-submit-request@debbugs.gnu.org?subject=subscribe>
Errors-To: debbugs-submit-bounces@debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces@debbugs.gnu.org>
X-Spam-Score: 0.0 (/)

ludo@gnu.org (Ludovic Courtès) writes:

> BTW, what timestamps to we put on the modified files?  We want that to
> be deterministic so we cannot use the build time.  We cannot use a date
> in the future, either.  We cannot use Jan. 1 1970 either because that
> means that modified files may now be older than the unmodified files,
> which may break build systems; for the same reason, we cannot leave the
> mtime of modified files unchanged.
>
> Now that I think about it, it’s not clear to me what can be done without
> breaking something.
>
> Thoughts?

We could set the timestamp of modified files to be 1 second newer than
the newest file in the original source archive.

      Mark

Display info messages

Send a report that this bug log contains spam.

debbugs.gnu.org maintainers <help-debbugs@gnu.org>. Last modified: Tue Sep 9 11:12:39 2025; Machine Name: wallace-server

GNU bug tracking system

Debbugs is free software and licensed under the terms of the GNU Public License version 2. The current version can be obtained from https://bugs.debian.org/debbugs-source/.

#26734 Snippets (even empty ones) of tar sources reset the timestamps of all files