From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ricardo Wurmus <rekado@elephly.net>
Subject: bug#35621: Simplify comparing guix challenge results
Date: Wed, 08 May 2019 22:28:46 +0200
Message-ID: <87zhnwd729.fsf@elephly.net>
References: <87sgtqxhwi.fsf@yucca> <87o94dw10g.fsf@gnu.org>
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To: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@gnu.org>
Cc: 35621@debbugs.gnu.org, Vagrant Cascadian <vagrant@reproducible-builds.org>


Ludovic Court=C3=A8s <ludo@gnu.org> writes:

> Hi!
>
> Vagrant Cascadian <vagrant@reproducible-builds.org> skribis:
>
>> What about an argument to "guix challenge" that handles the downloading
>> and unpacking to a temporary directory, and possibly another that also
>> runs a comparison tool against the results. Maybe something like:
>>
>>   $ guix challenge --download-differences
>>   /tmp/git-XXXXX/SUBSTITTE-X/...-git-2.5.0
>>   /tmp/git-XXXXX/SUBSTITUTE-Y/...-git-2.5.0
>>   /gnu/store/...-git-2.5.0
>>
>> Downloads and unpacks the substitutes, and outputs the resulting
>> directories.
>>
>>
>>   $ guix challenge --download-differences --compare-with=3D"diffoscope .=
.."
>>
>> This would do the above, plus run diffoscope on the directories
>> ... though I think diffoscope can only compare between two things at a
>> time... so that might get difficult if many substitutes return results.
>
> Sounds like a good idea.  Perhaps =E2=80=98--compare-with=E2=80=99 is act=
ually enough
> (it would also download things), dunno.

I think it=E2=80=99s fine to have just =E2=80=9C--compare-with=E2=80=9D, wh=
ich would print the
location of the downloaded things, so you could compare with =E2=80=9Cecho=
=E2=80=9D if
all you wanted is to get the differences.

--
Ricardo