GNU bug report logs - #45675
Zip-based archives store timestamps

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From: Julien Lepiller <julien <at> lepiller.eu>
To: Miguel Ángel Arruga Vivas <rosen644835 <at> gmail.com>, 45675 <at> debbugs.gnu.org
Subject: bug#45675: Zip-based archives store timestamps
Date: Tue, 05 Jan 2021 10:17:53 -0500

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For java packages, we have a strip-jar-timestamps phase in the ant-build-system.

Le 5 janvier 2021 08:10:37 GMT-05:00, "Miguel Ángel Arruga Vivas" <rosen644835 <at> gmail.com> a écrit :
>A procedure like reset-gzip-timestamp should be useful for
>reproducibility purposes, adapted to zip based archives as Smalltalk's
>STAR or Java's JAR binary formats, as some or all of their contents are
>generated usually at build time.
>
>On the latest Zip specification[1], which only seem to be encumbered
>regarding encryption, there is one header ID which could be used for
>timestamp purposes (0x0020) but third party header IDs are allowed,
>which include a "commonly used" 0x5455 timestamp.
>
>[1] https://pkware.cachefly.net/webdocs/APPNOTE/APPNOTE-6.3.8.TXT

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