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bug#61161: package-input-rewriting causes different ordering of grafts
From: |
Josselin Poiret |
Subject: |
bug#61161: package-input-rewriting causes different ordering of grafts |
Date: |
Wed, 01 Feb 2023 18:23:21 +0100 |
Hi Akira,
Akira Kyle <akira@akirakyle.com> writes:
> Inspecting these derivations, the difference between them seems to
> be that in the former has zlib first in the `mapping` field of the
> graft while in the latter zlib is last. My guess is this is due to
> the fact that the emacs-compat override adds lzip to its
> native-inputs and causes a different traversal order for grafting
> zlib. But this is my first time attempting to look at the grafting
> machinery in detail, so hopefully the experts can figure out if
> this really is a bug and how to fix it!
>
> I don't have a concrete example where this causes issues in
> practice, since here the two packages would conflict anyways due
> to different compat versions, but it seems like that's mostly a
> consequence of emacs-packages having propagated dependencies. At
> the very least it would seem to cause unnecessary duplication in
> the store.
This makes me think of [1], which was supposedly fixed, although from
what I remember we didn't actually find out what was causing this.
[1] https://issues.guix.gnu.org/58419
Best,
--
Josselin Poiret
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