GNU bug report logs - #75782
[PATCH cuirass] remote-server: Disable url-fetch* fallback when triggering substitutes.

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Message #8 received at 75782 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: vicvbcun <guix <at> ikherbers.com>
Cc: 75782 <at> debbugs.gnu.org
Subject: Re: bug#75782: [PATCH cuirass] remote-server: Disable url-fetch*
 fallback when triggering substitutes.
Date: Thu, 13 Feb 2025 16:09:20 +0100

Hi,

vicvbcun <guix <at> ikherbers.com> skribis:

> If an output is larger than the configured cache bypass threshold and the
> substitute hasn't already been baked, guix publish returns a 404 response and
> schedules baking.  This error code causes `url-fetch*' to instead try fetching
> the narinfo from the Internet Archive.  Suppress this fallback behaviour as
> the sole purpose is triggering the baking of substitutes.
>
> * src/cuirass/scripts/remote-server.scm (trigger-substitutes-baking): Bind
> `%download-methods' to the empty list befor calling `url-fetch*'.

Good catch!

> +       (parameterize
> +           ;; XXX: guix publish returns a 404 response when the output is
> +           ;; large and has not already been baked.  By default, this causes
> +           ;; `url-fetch*' to fall back to the Internet Archive.  Disable
> +           ;; this.
> +           ((%download-methods '()))
> +         (url-fetch* narinfo-url tmp-file))))))

Shouldn’t it be '(upstream) rather than '()?

(I’m looking at guix/build/download.scm.)

Thanks,
Ludo’.

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