GNU bug report logs - #39151
Dry-run doesn't say everything

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Julien Lepiller <julien <at> lepiller.eu>
To: bug-guix <at> gnu.org
Subject: Dry-run doesn't say everything
Date: Thu, 16 Jan 2020 10:07:03 -0500

On a recently installed system, I ran guix install coq -n. Guix told me it would download 270 MB and do 4 hooks. Guix install coq however told me it will 521 MB (which it did) including a lot more packages (including coq:ide),the same 4 hooks with different store hashes and additional grafts. This was quite unexpected :)

Once coq is in the repo though, guix gc will remove coq:ide and dependencies, and re-installing coq in a new profile will not pull coq:ide in anymore. Note that coq was grafted.

Message #8 received at 39151 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: Julien Lepiller <julien <at> lepiller.eu>
Cc: 39151 <at> debbugs.gnu.org
Subject: Re: bug#39151: Dry-run doesn't say everything
Date: Sun, 19 Jan 2020 21:26:55 +0100

Hi,

Julien Lepiller <julien <at> lepiller.eu> skribis:

> On a recently installed system, I ran guix install coq -n. Guix told me it would download 270 MB and do 4 hooks. Guix install coq however told me it will 521 MB (which it did) including a lot more packages (including coq:ide),the same 4 hooks with different store hashes and additional grafts. This was quite unexpected :)
>
> Once coq is in the repo though, guix gc will remove coq:ide and dependencies, and re-installing coq in a new profile will not pull coq:ide in anymore. Note that coq was grafted.

Yes, the difference is due to the current implementation of grafts
(‘--dry-run’ implies ‘--no-grafts’).  It’s unfortunate, but there’s no
easy workaround, I think.

Ludo’.

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