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)
Cc: tracker <at> debbugs.gnu.org
Subject: bug#18747: closed ("preferLocalBuild" fails to distinguish
 between offload and substitute)
Date: Thu, 02 Jul 2015 22:34:02 +0000

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Your message dated Fri, 03 Jul 2015 00:33:14 +0200
with message-id <87bnfuw5p1.fsf <at> gnu.org>
and subject line Re: bug#18747: Fixed-output derivations are not substituted
has caused the debbugs.gnu.org bug report #18747,
regarding "preferLocalBuild" fails to distinguish between offload and substitute
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> 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: 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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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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