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[debbugs-tracker] bug#36509: closed (guix pull: too many substitute upda

From: GNU bug Tracking System
Subject: [debbugs-tracker] bug#36509: closed (guix pull: too many substitute updates, or bad log messages)
Date: Wed, 17 Jul 2019 22:52:03 +0000 
Your message dated Thu, 18 Jul 2019 00:51:25 +0200
with message-id <address@hidden>
and subject line Re: bug#36509: guix pull: too many substitute updates, or bad 
log messages
has caused the debbugs.gnu.org bug report #36509,
regarding guix pull: too many substitute updates, or bad log messages
to be marked as done.

(If you believe you have received this mail in error, please contact
address@hidden.)


-- 
36509: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=36509
GNU Bug Tracking System
Contact address@hidden with problems
--- Begin Message --- Subject: guix pull: too many substitute updates, or bad log messages Date: Fri, 5 Jul 2019 13:20:17 +0200 
When running `guix pull`, output like the following is common
for me:

$ guix pull
Updating channel 'puzzlink' from Git repository at '/home/rob/guix-puzzlink'…
[…]
Building from these channels:
  guix      https://github.com/robx/guix.git    11f68b3
[…]
Computing Guix derivation for 'x86_64-linux'... |
The following derivations will be built:
   /gnu/store/ym0l8rvnh3aa3qv8g3xgh1mszbhww8c2-elm.drv
[…]
   /gnu/store/dcxwfh37bn8r3h8s9w7wfq8yhzynqxx5-profile.drv
The following profile hooks will be built:
   /gnu/store/biw1n2a956skpaa4m7rmka6j8h1clhmv-guix-package-cache.drv
[…]
   /gnu/store/kxrkynck33ypwyy09ypi2qm7737fsw28-fonts-dir.drv
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
building /gnu/store/wxfi8mdp11l5k4ngkbsy9apcg9h74jfk-guix-system.drv…

Either guix is making useless extra downloads or:

(a) the substitute log message should be changed to differentiate between
the different calls
(b) there should be extra log messages before the substitute messages to
indicate what guix is doing that causes the individual substitue messages.

--- End Message ---
--- Begin Message --- Subject: Re: bug#36509: guix pull: too many substitute updates, or bad log messages Date: Thu, 18 Jul 2019 00:51:25 +0200 User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.2 (gnu/linux) 
Hi,

Robert Vollmert <address@hidden> skribis:

> When running `guix pull`, output like the following is common
> for me:
>
> $ guix pull
> Updating channel 'puzzlink' from Git repository at '/home/rob/guix-puzzlink'…
> […]
> Building from these channels:
>   guix      https://github.com/robx/guix.git  11f68b3
> […]
> Computing Guix derivation for 'x86_64-linux'... |
> The following derivations will be built:
>    /gnu/store/ym0l8rvnh3aa3qv8g3xgh1mszbhww8c2-elm.drv
> […]
>    /gnu/store/dcxwfh37bn8r3h8s9w7wfq8yhzynqxx5-profile.drv
> The following profile hooks will be built:
>    /gnu/store/biw1n2a956skpaa4m7rmka6j8h1clhmv-guix-package-cache.drv
> […]
>    /gnu/store/kxrkynck33ypwyy09ypi2qm7737fsw28-fonts-dir.drv
> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
> building /gnu/store/wxfi8mdp11l5k4ngkbsy9apcg9h74jfk-guix-system.drv…

I believe this is fixed by 9b9b753529db1c7a8c4628cc255e358703c15618.

The story here is that we were calling ‘show-what-to-build’ with
#:use-substitutes #f.  Thus, Guix would not try to see which substitutes
are available (and it’d report that everything must be built.)

But right after that, we’d build the profile with substitutes enabled,
and at that point it would have to fetch substitute info (“narinfos”)
for each of these, more or less one at a time (because ‘guix substitute
--substitute’ is called once for each store item.)

IOW, ‘show-what-to-build’ warms the substitute info cache as a
side-effect, and that cache warm-up was not happening here.

Thanks,
Ludo’.

--- End Message ---
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