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bug#26734: Snippets (even empty ones) of tar sources reset the timestamp

From: Ludovic Courtès
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
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux)

Mark H Weaver <address@hidden> skribis:

> address@hidden (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.


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