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bug#45174: ‘guix substitute’ doesn’t handle HTTP redirects


From: Julien Lepiller
Subject: bug#45174: ‘guix substitute’ doesn’t handle HTTP redirects
Date: Tue, 12 Jan 2021 18:11:55 +0100

Le Fri, 11 Dec 2020 10:50:36 +0100,
Ludovic Courtès <ludovic.courtes@inria.fr> a écrit :

> Hi!
> 
> As reported by mange on #guix, it seems that ‘guix substitute’ does
> not follow redirects:
> 
> --8<---------------cut here---------------start------------->8---
> $ guix weather icecat emacs --substitute-urls=https://ci.guix.gnu.org
> computing 2 package derivations for x86_64-linux...
> looking for 2 store items on https://ci.guix.gnu.org...
> updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
> https://ci.guix.gnu.org
>   100.0% substitutes available (2 out of 2)
>   at least 201.3 MiB of nars (compressed)
>   293.5 MiB on disk (uncompressed)
>   0.084 seconds per request (0.2 seconds in total)
>   11.9 requests per second
> 
>   at least 1,000 queued builds
>       x86_64-linux: 368 (36.8%)
>       i686-linux: 556 (55.6%)
>       armhf-linux: 6 (.6%)
>       aarch64-linux: 69 (6.9%)
>       i586-gnu: 1 (.1%)
>   build rate: 154.41 builds per hour
>       i686-linux: 40.77 builds per hour
>       x86_64-linux: 37.06 builds per hour
>       armhf-linux: 40.30 builds per hour
>       aarch64-linux: 35.83 builds per hour
>       i586-gnu: 0.55 builds per hour
> $ guix weather icecat emacs --substitute-urls=https://ci.guix.info
> computing 2 package derivations for x86_64-linux...
> looking for 2 store items on https://ci.guix.info...
> updating substitutes from 'https://ci.guix.info'... 100.0%
> https://ci.guix.info
>   0.0% substitutes available (0 out of 2)
>   unknown substitute sizes
>   0.0 MiB on disk (uncompressed)
>   0.069 seconds per request (0.1 seconds in total)
>   14.4 requests per second
> ni sekvas la redirektigon al 'https://ci.guix.gnu.org/api/queue'...
>   'https://ci.guix.gnu.org/api/queue' returned 500 ("Internal Server
> Error") --8<---------------cut
> here---------------end--------------->8---
> 
> This might explain things like <https://issues.guix.gnu.org/45051>.
> 
> (*.guix.info were turned into HTTP redirects a few days ago, see
> <https://git.savannah.gnu.org/cgit/guix/maintenance.git/commit/?id=c85e128e11d3ba060ae3a6e01da20f531b42d6ef>.)
> 
> Ludo’.
> 
> 
> 

Here is a patch to fix that issue. Since ci.guix.info now returns 200,
it's difficult to test the patch. I created a location block on my
website to redirect lepiller.eu/*.narinfo -> ci.guix.gnu.org/*.narinfo.
Here's the result:

$ guix weather icecat emacs --substitute-urls=https://lepiller.eu
calcul de 2 dérivations de paquets pour x86_64-linux…
recherche de 2 éléments du dépôt sur https://lepiller.eu...
mise à jour des substituts depuis « https://lepiller.eu »... 100.0 %
https://lepiller.eu
  0.0 % des substituts sont disponibles (0 sur 2)
  taille des substituts inconnue
  0,0 Mo sur le disque (décompressé)
  0,207 secondes par requête (0,4 secondes en tout)
  4,8 requêtes par seconde


$ ./pre-inst-env guix weather icecat emacs
--substitute-urls=https://lepiller.eu
computing 2 package derivations for x86_64-linux...
looking for 2 store items on https://lepiller.eu...
updating substitutes from 'https://lepiller.eu'... 100.0%
https://lepiller.eu
  100.0% substitutes available (2 out of 2)
  at least 201,3 MiB of nars (compressed)
  293,5 MiB on disk (uncompressed)
  0,525 seconds per request (1,1 seconds in total)
  1,9 requests per second


(note that I didn't redirect the ci API on my server, so the rest of the
weather command fails with a backtrace, but it's unrelated to this
patch and this issue).

Attachment: 0001-substitute-Follow-narinfo-redirections.patch
Description: Text Data


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