gh-134261: ZipFile - Don't rely on local time for reproducible builds & tests #134264
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Most changes to Python require a NEWS entry. Add one using the blurb_it web app or the blurb command-line tool. If this change has little impact on Python users, wait for a maintainer to apply the |
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I added this feature 8 months ago. There was a reason for using localtime. See #124435 (review) and 54a7116 Maybe we can ask @jaraco |
emmatyping
reviewed
May 27, 2025
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| zip: On reproducible builds, ZipFile longer pulls in local environment timezone when writing file datetimes | |||
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Suggested change
| zip: On reproducible builds, ZipFile longer pulls in local environment timezone when writing file datetimes | |
| zip: On reproducible builds, ZipFile uses UTC instead of the local time when writing file datetimes to avoid underflows. |
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See #134261 for issue background and technical detail on causes. This solves the issue by using
gmtimewheneverSOURCE_DATE_EPOCHis involved, to prevent pulling in system timezone information when performing time calculations.