GNU bug report logs - #28310
Grafting prevents build plan from being displayed upfront

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Andreas Enge <andreas <at> enge.fr>
Subject: bug#28310: closed (Re: bug#28310: guix build -n misses package
 builds)
Date: Thu, 07 Sep 2017 12:44:01 +0000

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Your bug report

#28310: Grafting prevents build plan from being displayed upfront

which was filed against the guix package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 28310 <at> debbugs.gnu.org.

-- 
28310: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=28310
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Andreas Enge <andreas <at> enge.fr>
To: Ludovic Courtès <ludo <at> gnu.org>
Cc: 28310-done <at> debbugs.gnu.org
Subject: Re: bug#28310: guix build -n misses package builds
Date: Thu, 7 Sep 2017 14:42:55 +0200

On Sat, Sep 02, 2017 at 01:08:12AM +0200, Ludovic Courtès wrote:
> “-n” now implies “--no-grafts” (commit
> fd59105c49965db956fac73c68d8b00d068f5d5c).  This was motivated by the
> need to have -n really perform a dry run.
> 
> The downside is that with -n we now see only half of the build plan, and
> when we remove -n, we start with the other half of the build plan,
> grafting.
> 
> The “build continuation” idea of ‘wip-gexp-grafts’, discussed in
> <https://bugs.gnu.org/22990>, could in theory help with that.

Okay, so to simplify, I am closing this bug report.

Andreas

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From: Andreas Enge <andreas <at> enge.fr>
To: bug-guix <at> gnu.org
Subject: guix build -n misses package builds
Date: Thu, 31 Aug 2017 21:03:34 +0200

Hello,

I am right now in the process of updating pari-gp to version 2.9.3.
After building it on a git check-out of three days ago, which went smoothly,
I rebased my patch on today's master and was pleased to see that no rebuild
was needed:

$ ./pre-inst-env guix build pari-gp -n
outputs nothing.

However, once the -n dropped, the gd package gets built.
And then it is starting ruby, which has no connection to pari-gp:
Downloading https://mirror.hydra.gnu.org/guix/nar/229n3pzp5bdmbdvwslg0dxliysas92k5-ruby-2.4.1.tar.xz...
   ruby-2.4.1.tar.xz  9.5MiB                                                                                                       22KiB/s 00:06 [                    ]   1.3%^

Andreas

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