GNU bug report logs - #18747
"preferLocalBuild" fails to distinguish between offload and substitute

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: ludo <at> gnu.org (Ludovic Courtès)
Subject: bug#18747: closed (Re: bug#18747: Fixed-output derivations are
 not substituted)
Date: Thu, 02 Jul 2015 22:34:03 +0000

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Your bug report

#18747: "preferLocalBuild" fails to distinguish between offload and substitute

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 18747 <at> debbugs.gnu.org.

-- 
18747: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=18747
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: ludo <at> gnu.org (Ludovic Courtès)
To: 18747-done <at> debbugs.gnu.org
Subject: Re: bug#18747: Fixed-output derivations are not substituted
Date: Fri, 03 Jul 2015 00:33:14 +0200

Fixed in 4a6aeb6.

Note that there are still a few cases, in guix/*download.scm, where we
haven’t yet reintroduced #:local-build? #t.  We’ll do that when daemons
with the fix are more widely deployed.

Ludo’.

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From: ludo <at> gnu.org (Ludovic Courtès)
To: bug-guix <at> gnu.org
Subject: Fixed-output derivations are not substituted
Date: Thu, 16 Oct 2014 17:26:03 +0200

With current ‘master’, fixed-output derivations are not substituted,
even though a substitute is available:

--8<---------------cut here---------------start------------->8---
$ guix build -S acct
The following file will be downloaded:
   /gnu/store/0sszdqmiqmb4mzbgs8h2185fh7p8bfd2-acct-6.6.1.tar.gz
@ build-started /gnu/store/b7c2lgbdnr5anzklxkzhjvqxl14n7cqp-acct-6.6.1.tar.gz.drv - x86_64-linux /var/log/guix/drvs/b7//c2lgbdnr5anzklxkzhjvqxl14n7cqp-acct-6.6.1.tar.gz.drv.bz2
starting download of `/gnu/store/0sszdqmiqmb4mzbgs8h2185fh7p8bfd2-acct-6.6.1.tar.gz' from `http://ftpmirror.gnu.org/acct/acct-6.6.1.tar.gz'...
following redirection to `http://gnu.cardse.net/acct/acct-6.6.1.tar.gz'...
http://gnu.cardse.net/.../acct-6.6.1.tar.gz	100.0% of 2802.4 KiB
@ build-succeeded /gnu/store/b7c2lgbdnr5anzklxkzhjvqxl14n7cqp-acct-6.6.1.tar.gz.drv -
/gnu/store/0sszdqmiqmb4mzbgs8h2185fh7p8bfd2-acct-6.6.1.tar.gz

$ sudo cat /var/guix/substitute-binary/cache/0sszdqmiqmb4mzbgs8h2185fh7p8bfd2
(narinfo (version 1) (cache-uri "http://hydra.gnu.org") (date 1413472751) (value "StorePath:...

$ guix build -S libwebsockets
The following file will be downloaded:
   /gnu/store/1k4c1a6nckhm2hjpprvdrlkxx6yifclw-libwebsockets-1.3
@ build-started /gnu/store/8x0jgw0819l7aqi1k1f6i772skmwq1zq-libwebsockets-1.3.drv - x86_64-linux /var/log/guix/drvs/8x//0jgw0819l7aqi1k1f6i772skmwq1zq-libwebsockets-1.3.drv.bz2
Cloning into '/gnu/store/1k4c1a6nckhm2hjpprvdrlkxx6yifclw-libwebsockets-1.3'...
C-c C-c

$ sudo cat /var/guix/substitute-binary/cache/1k4c1a6nckhm2hjpprvdrlkxx6yifclw
(narinfo (version 1) (cache-uri "http://hydra.gnu.org") (date 1413466633) (value "StorePath:...
--8<---------------cut here---------------end--------------->8---

Here, “The following file will be downloaded” means that a substitute is
found and will be used, as seen also in the cache.  But then we find
ourselves performing the derivation locally regardless.

Ludo’.

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