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

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From: ludo <at> gnu.org (Ludovic Courtès)
To: Mark H Weaver <mhw <at> netris.org>
Cc: 26734 <at> debbugs.gnu.org, Clément Lassieur <clement <at> lassieur.org>
Subject: bug#26734: Snippets (even empty ones) of tar sources reset the timestamps of all files
Date: Thu, 04 May 2017 00:01:21 +0200

Mark H Weaver <mhw <at> netris.org> skribis:

> ludo <at> 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.

Sounds like a good idea.

Thanks,
Ludo’.

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