GNU bug report logs

#26608 Provide --only-substitutes flag to "guix package --upgrade"

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From: zimoun <zimon.toutoune@gmail.com>
To: ludo@gnu.org (Ludovic Courtès)
Subject: Re: bug#26608: bug#22629: “Stable” branch
References: <87vb5vsffd.fsf@gnu.org> <87pny2iks2.fsf@gnu.org>
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Date: Fri, 20 Aug 2021 13:09:18 +0200
In-Reply-To: <878t4nqzqv.fsf@gnu.org> ("Ludovic Courtès"'s message of "Fri, 31 Aug 2018 00:02:48 +0200")
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Cc: 26608@debbugs.gnu.org, Konrad Hinsen <konrad.hinsen@fastmail.net>,
 Alex Sassmannshausen <alex@pompo.co>, 22629@debbugs.gnu.org,
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Hi,

On Fri, 31 Aug 2018 at 00:02, ludo@gnu.org (Ludovic Courtès) wrote:

> (Cc’ing <https://bugs.gnu.org/32022> and <https://bugs.gnu.org/26608>,
> which are related.)
>
> Alex Sassmannshausen <alex@pompo.co> skribis:
>
>> I don't know if this is what Konrad desires, but from my perspective, a
>> desirable part of the definition of stable would be a that the build
>> farms have produced a set of binaries/substitutes for a given Guix
>> revision that is "good enough".
>
> I just had a bright idea (yes!): this can be addressed by writing
> something like this in ~/.config/guix/channels.scm:
>
>   (map latest-commit-with-substitutes-available
>        %default-channels)
>
> The hypothetical ‘latest-commit-with-substitutes-available’ would use
> (git) and (guix ci) to find the latest commit for which substitutes of
> interest are available, and would return:
>
>   (channel
>     ;; …
>     (commit "cabbag3"))   ;the ideal commit
>
> This has to be done with great care to prevent a downgrade attack and to
> make sure the user doesn’t miss out on security updates, but maybe we
> could provide a procedure that makes reasonable choices.

From my understanding, this bug can be close because:

<https://guix.gnu.org/manual/devel/en/guix.html#Channels-with-Substitutes>
<https://guix.gnu.org/manual/devel/en/guix.html#Channel-Authentication>

WDYT?

All the best,
simon

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