[Reproducible-builds] Bug#787444: Bug#787444: Bug#787444: help2man: support externally-supplied --date for reproducibility

[Ximin Luo]

On 10/06/15 12:41, Brendan O'Dea wrote:
> On 10 June 2015 at 01:59, Ximin Luo <infinity0 at pwned.gg> wrote:
>> Given the above, I think it would still be good to define SOURCE_DATE as I originally suggested:
>>
>> SOURCE_DATE = "$(date -d "$(dpkg-parsechangelog --count 1 -SDate)" --iso-8601=seconds)" # includes the TZ offset
>>
>> - if the language/tool already has/uses a ISO8601 parser in its standard library, this is as convenient as the previous SOURCE_DATE_UTC
>> - if the language/tool doesn't have/use one, then SOURCE_DATE_UTC doesn't actually give us any benefits:
>>   - it's far easier to use SOURCE_DATE_EPOCH, if you want to play with the date programmatically
>>   - OTOH if you're just going to take substrings/regex-match it, this works just as easily for SOURCE_DATE vs SOURCE_DATE_UTC, and the former contains more information
>>
>> But I care less about this latter point; the main point of this email is to argue for SOURCE_DATE_EPOCH over SOURCE_DATE_UTC (iso8601 locked to "Z" timezone).
> 
> I disagree that SOURCE_DATE_UTC provides no benefit over SOURCE_DATE:
> at the very least, a program could choose to use it as an
> uninterpreted string (similar to the proposed --date option at the
> start of this bug, but from the environment rather than a flag).
> SOURCE_DATE with an arbitrary offset not so much.
> 

The TZ offset is given statically in debian/changelog, and that can also be part of the "uninterpreted string". It's no less arbitrary than the rest of the date itself.

> I'm happy to accept SOURCE_DATE, SOURCE_DATE_UTC, SOURCE_DATE_EPOCH or
> even SOURCE_DATE_EXTRACTED_FROM_DEBIAN_CHANGELOG_WITH_NO_INTERPRETATION
> however.  Pick one.
> 

OK, then let's go with SOURCE_DATE_EPOCH.

X

-- 
GPG: 4096R/1318EFAC5FBBDBCE
git://github.com/infinity0/pubkeys.git

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 819 bytes
Desc: OpenPGP digital signature
URL: <http://lists.alioth.debian.org/pipermail/reproducible-builds/attachments/20150610/315d5895/attachment.sig>