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[bug#47989] [PATCH] channels: Add a #:system argument to channel-instanc
From: |
Ludovic Courtès |
Subject: |
[bug#47989] [PATCH] channels: Add a #:system argument to channel-instances->manifest. |
Date: |
Mon, 03 May 2021 22:56:31 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) |
Hi,
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?
(You may also want to turn off grafts in the inferior.)
Ludo’.
- [bug#47989] [PATCH] channels: Add a #:system argument to channel-instances->manifest.,
Ludovic Courtès <=