From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alex Kost <alezost@gmail.com>
Subject: bug#22990: Grafts leads to inefficient substitute info retrieval
Date: Sat, 12 Mar 2016 12:23:35 +0300
Message-ID: <87a8m4123s.fsf@gmail.com>
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In-Reply-To: <8737rxx8gk.fsf@gnu.org> ("Ludovic
	\=\?utf-8\?Q\?Court\=C3\=A8s\=22'\?\=
	\=\?utf-8\?Q\?s\?\= message of "Fri, 11 Mar 2016 17:52:59 +0100")
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To: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@gnu.org>
Cc: 22990@debbugs.gnu.org

Ludovic Court=C3=A8s (2016-03-11 19:52 +0300) wrote:

> As of right now (v0.9.0-2007-g66a30a3), =E2=80=98graft-derivation=E2=80=
=99 works either by:
>
>   1. Fetching substitute info about the things being built so that it
>      can determine its references, which in turns allows it to determine
>      whether they need to be grafted.
>
>   2. Building stuff, as a last resort, so that it can determine its
>      references.

I noticed that #1 is happening even with --no-substitutes option.  Is it
intended?

I've tried this:

$ guix build --dry-run --no-substitutes mutt
substitute: updating list of substitutes from 'http://hydra.gnu.org'... 100=
.0%
substitute: updating list of substitutes from 'http://hydra.gnu.org'... 100=
.0%
substitute: updating list of substitutes from 'http://hydra.gnu.org'... 100=
.0%
substitute: updating list of substitutes from 'http://hydra.gnu.org'... 100=
.0%
substitute: updating list of substitutes from 'http://hydra.gnu.org'... 100=
.0%
The following derivations would be built:
   /gnu/store/a2w22xlmfwkgwx4vw11dxc6zrdmww435-mutt-1.5.24.drv
   ...

--=20
Alex