[Reproducible-builds] Fwd: Re: [Python-modules-team] Bug#824266: mkdocs: Please support SOURCE_DATE_EPOCH specification for build time stamps [origin: bam at debian.org]

[Axel Beckert]

Hi,

could someone more python-savvy than me have a look at this claim that
our SOURCE_DATE_EPOCH example for Python on
https://wiki.debian.org/ReproducibleBuilds/TimestampsProposal#Examples
is wrong.

The claim is here:
https://github.com/mkdocs/mkdocs/issues/938#issuecomment-219574932

----- Forwarded message from Brian May <bam at debian.org> -----
Date: Tue, 17 May 2016 09:16:36 +1000
From: Brian May <bam at debian.org>
To: Axel Beckert <abe at debian.org>, 824266 at bugs.debian.org
Subject: Re: [Python-modules-team] Bug#824266: mkdocs: Please support	SOURCE_DATE_EPOCH specification for build time stamps
Sender: Brian May <brian at microcomaustralia.com.au>
Organization: Debian

Axel Beckert <abe at debian.org> writes:
> See https://wiki.debian.org/ReproducibleBuilds/TimestampsProposal#Examples
> for some examples on how to implement support for SOURCE_DATE_EPOCH,
> including an example for Python.

Response from the upstream author (please consider replying to the
upstream bug report, not here):

"FYI, the Python example is wrong. If `SOURCE_DATE_EPOCH` is supposed to
be a Unix timestamp (number of seconds since epoch), then
`time.gmtime()` is not the Python equivalent. However,
`calendar.timegm(datetime.datetime.utcnow().utctimetuple())` or
`calendar.timegm(time.gmtime())` is. It is annoyingly complicated to get
a Unix timestamp in Python. Although Python >= 3.3 makes it easier with
`datetime.datetime.utcnow().timestamp()`.  Not sure how the `datetime`
module went so long without the ability to return a timestamp."
-- 
Brian May <bam at debian.org>
----- End forwarded message -----

		Regards, Axel
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