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From: Christopher Baines <mail@cbaines.net>
To: "Ludovic Courtès" <ludo@gnu.org>
Cc: 47989@debbugs.gnu.org
Subject: [bug#47989] [PATCH] channels: Add a #:system argument to channel-instances->manifest.
Date: Mon, 03 May 2021 22:35:49 +0100	[thread overview]
Message-ID: <87im3zcxfu.fsf@cbaines.net> (raw)
In-Reply-To: <877dkfv8n4.fsf@gnu.org>

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Ludovic Courtès <ludo@gnu.org> writes:

> Christopher Baines <mail@cbaines.net> skribis:
>
>> This allows computing a manifest for a specific system. Previously this was
>> possible, but only through changing %current-system, which caused the
>> derivation to be computed using that system as well (so computing a derivation
>> for aarch64-linux on x86_64-linux would require running aarch64-linux code).
>
> I remember discussing it, but I wonder if I was confused.
>
> I think you can always do the equivalent of (say):
>
>   guix time-machine -- build -s armhf-linux hello -d
>
> … where Guix itself is built natively but it then computes a derivation
> for a different architecture.
>
> The equivalent code would be roughly:
>
>   (let ((inferior (inferior-for-channels …)))
>     (inferior-package-derivation store
>                                  (car (lookup-inferior-packages inferior "hello"))
>                                  "armhf-linux"))
>
> Does that make sense?

Not really, this is just about manifests for channel instances, so
nothing to do with package derivations as far as I'm aware.

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  reply	other threads:[~2021-05-03 21:36 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-24  8:14 [bug#47989] [PATCH] channels: Add a #:system argument to channel-instances->manifest Christopher Baines
2021-05-03 20:56 ` Ludovic Courtès
2021-05-03 21:35   ` Christopher Baines [this message]
2021-05-04 13:48     ` Ludovic Courtès
2021-05-05  9:28       ` Christopher Baines
2021-05-11  8:48         ` Ludovic Courtès
2021-05-04 13:52 ` Ludovic Courtès
2021-05-05 11:25   ` Christopher Baines
2021-05-05 11:24 ` [bug#47989] [PATCH v2] " Christopher Baines
2021-05-11  8:52   ` [bug#47989] [PATCH] " Ludovic Courtès
2021-05-12  8:52     ` bug#47989: " Christopher Baines

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