From: "Ludovic Courtès" <ludo@gnu.org>
To: Christopher Baines <mail@cbaines.net>
Cc: 47989@debbugs.gnu.org
Subject: [bug#47989] [PATCH] channels: Add a #:system argument to channel-instances->manifest.
Date: Tue, 04 May 2021 15:48:21 +0200 [thread overview]
Message-ID: <87eeemr4nu.fsf@gnu.org> (raw)
In-Reply-To: <87im3zcxfu.fsf@cbaines.net> (Christopher Baines's message of "Mon, 03 May 2021 22:35:49 +0100")
Hi Christopher,
Christopher Baines <mail@cbaines.net> skribis:
> 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.
I re-read your message and must have misunderstood. It’s the derivation
of channel instances that you want for a given system, right? (What’s
the use case though?) In that case something along the lines of the
patch makes perfect sense.
Thanks,
Ludo’.
next prev parent reply other threads:[~2021-05-04 13:50 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
2021-05-04 13:48 ` Ludovic Courtès [this message]
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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