[New-bugs-announce] [issue34097] ZIP does not support timestamps before 1980

[Petr Viktorin]

New submission from Petr Viktorin <encukou at gmail.com>:

The ZIP format cannot handle times before 1980.
Issue6090 provided a nice error message for trying to add such files.

I'm seeing a system for reproducible builds that sets mtime to 1970 (zero UNIX timestamp), resulting in files that Python can't package into (zip-based) wheels.

At least here on Fedora, the `zip` command-line utility silently bumps old timestamps to 1980-01-01. Of course, silently corrupting data would not be good default behavior for Python.
But in many cases timestamps don't matter. It would be nice to give ZipFile and ZipFile.write() a `strict_timestamps=True` keyword argument that could be turned off.

----------
components: Library (Lib)
messages: 321460
nosy: petr.viktorin
priority: normal
severity: normal
status: open
title: ZIP does not support timestamps before 1980
versions: Python 3.8

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34097>
_______________________________________