GNU bug report logs - #35621
Simplify comparing guix challenge results

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From: Ludovic Courtès <ludo <at> gnu.org>
To: Vagrant Cascadian <vagrant <at> reproducible-builds.org>
Cc: 35621 <at> debbugs.gnu.org
Subject: bug#35621: Simplify comparing guix challenge results
Date: Wed, 08 May 2019 15:04:31 +0200

Hi!

Vagrant Cascadian <vagrant <at> 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="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 ‘--compare-with’ is actually enough
(it would also download things), dunno.

Ludo’.

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