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bug#54495: unexpected download after gc
From: |
raingloom |
Subject: |
bug#54495: unexpected download after gc |
Date: |
Tue, 22 Mar 2022 21:00:28 +0100 |
On Fri, 18 Mar 2022 14:50:01 +0100
zimoun <zimon.toutoune@gmail.com> wrote:
> Hi,
>
> Considering this with revision a03936a:
>
> guix gc
> guix install python-ipython -p tools
> guix gc
> guix install python-ipython -p tools
>
> I am surprised that:
>
> 1. the second GC collects things
> 2. the second install downloads things
>
> especially by this line:
>
> python-ipython-7.27.0 892KiB 4.6MiB/s 00:00 [##################]
> 100.0%
>
>
> Well, it is because of grafts. The profile contains the grafted
> version and the installation expect first the non-grafted for
> computing the graft. For instance:
>
> --8<---------------cut here---------------start------------->8---
> $ guix gc --list-dead | grep ipython
> finding garbage collector roots...
> determining live/dead paths...
> /gnu/store/xmw4vxabnkm7vwa0ywfcqcmknbnia0c3-python-ipython-7.27.0
>
> guix build python-ipython --no-grafts
> /gnu/store/xmw4vxabnkm7vwa0ywfcqcmknbnia0c3-python-ipython-7.27.0
> --8<---------------cut here---------------end--------------->8---
>
> When something is grafted, is it possible to consider the non-grafted
> as a "derivation", i.e., control the GC with 'gc-keep-derivations'.
>
> Or the grafted could keep a reference to the non-grafted?
>
>
> Well, I was expecting that this composition:
>
> guix gc && guix install
>
> was "idempotent" in a way. :-) And to me, the fact that it is not is
> somehow a bug. Maybe, it is already well-known and not considered as
> bug.
>
>
> Cheers,
> simon
>
>
>
There should definitely be more attention paid to offline use so IMHO
this is a bug. Or at least missing feature.