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Re: how to customize mirror list used in custom channels?
From: |
Ludovic Courtès |
Subject: |
Re: how to customize mirror list used in custom channels? |
Date: |
Fri, 02 Dec 2022 10:01:13 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) |
Hi,
zimoun <zimon.toutoune@gmail.com> skribis:
> Does something like that would make sense?
Yes, that’s the idea.
> diff --git a/guix/download.scm b/guix/download.scm
> index 2e9ecb43fc..2497ea0f75 100644
> --- a/guix/download.scm
> +++ b/guix/download.scm
> @@ -499,6 +499,7 @@ (define %download-fallback-test
> (define* (url-fetch* url hash-algo hash
> #:optional name
> #:key (system (%current-system))
> + (mirrors %mirrors)
> (guile (default-guile))
> executable?)
> "Return a fixed-output derivation that fetches data from URL (a string, or
> a
> @@ -519,7 +520,8 @@ (define file-name
> (_
> (basename url))))
>
> - (let ((uri (and (string? url) (string->uri url))))
> + (let ((uri (and (string? url) (string->uri url)))
> + (mirror-file (plain-file "mirrors" (object->string mirrors))))
There are subtleties though: we don’t want to create a new <plain-file>
at each call as this would lead to poor performance (lack of
memoization).
> This change would a world rebuild, right?
No, not at all.
Thanks,
Ludo’.
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