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From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: Odd behavior with --dry-run and --upgrade
Date: Tue, 26 Jul 2016 16:37:17 +0200
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In-Reply-To: <87fuqwa558.fsf@gmail.com> (Alex Kost's message of "Tue, 26 Jul
	2016 16:41:07 +0300")
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To: Alex Kost <alezost@gmail.com>
Cc: guix-devel <guix-devel@gnu.org>

Alex Kost <alezost@gmail.com> skribis:

> The only way I see for the Emacs interface is to modify
> "emacs/guix-main.scm" to parameterize =E2=80=98%graft?=E2=80=99 as well a=
nd to set it
> depending on the current value of =E2=80=98dry-run=E2=80=99.  AFAICT this
> parameterization should be added to:
>
> - 'process-package-actions': it is responsible for operations with
>   profiles (installing/upgrading/removing packages);
>
> - 'package-source-build-derivation': it is responsible for building
>   package sources.
>
> If my understanding is correct, I can make a patch for this.

Yes, it sounds good.

> I can also add 'grafts' option that will appear in prompts (in the
> mode-line along with 'substitutes' and 'dry-run'), but I'm not sure if
> it will be useful since dry-run will disable grafts anyway.

Yeah, I don=E2=80=99t think it=E2=80=99s useful.

Thanks,
Ludo=E2=80=99.