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Tasklist

FS#70302 - [pythia8] Package is unreproducible due to embedded timestamp

Attached to Project: Community Packages
Opened by Z. Ren (zren) - Monday, 05 April 2021, 15:47 GMT
Last edited by Konstantin Gizdov (kgizdov) - Tuesday, 06 April 2021, 11:02 GMT
Task Type Bug Report
Category Reproducible Builds
Status Closed
Assigned To Konstantin Gizdov (kgizdov)
Architecture All
Severity Low
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No

Details

Hi!

While conducting a research in the spirit of the "reproducible builds" [1], we have noticed that the package pythia8 could not be built reproducibly, in that the output of the `date` command is captured and embedded (see the attached diff.json). According to the documentation [2], if we replace `date` with `date --date=@$SOURCE_DATE_EPOCH`, and setting the environment variable $SOURCE_DATE_EPOCH (e.g., from .BUILDINFO as in the tool repro[2]) for reproducibility validation, the unreproducible issue will be resolved.

The attached patch does exactly this. Once applied, the package can be built reproducibly. Alternatively, for this package, simply removing `date` also works.

Additional info:
* pythia8 8.3.03-3

Steps to reproduce:
The unreproducible build result could be detected with reprotest/repro [2].

[1]: https://wiki.debian.org/ReproducibleBuilds
[2]: https://wiki.archlinux.org/index.php/DeveloperWiki:ReproducibleBuilds

Best wishes
   pythia8-reproducible.diff (0.6 KiB)
   diff.json (2.3 KiB)
This task depends upon

Closed by  Konstantin Gizdov (kgizdov)
Tuesday, 06 April 2021, 11:02 GMT
Reason for closing:  Implemented
Additional comments about closing:  pythia8 8.3.03-4
Comment by Z. Ren (zren) - Monday, 05 April 2021, 19:15 GMT
BTW, I just noticed here [1] that TZ and LANG may influence the date result. In this case, using `TZ=UTC LANG=C date --date=@$SOURCE_DATE_EPOCH` seems better?
[1] https://tests.reproducible-builds.org/archlinux/archlinux.html

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