[bug#57515] [PATCH 3/8] gnu-maintenance: Produce mirror:// URIs in latest-html-release.

[Maxime Devos <maximedevos@telenet.be>]

Partially fixes: https://issues.guix.gnu.org/57477.

TODO: test case, it's http!

I'm not aware of a package using both latest-html-release and mirrors, so it
has not been completely tested.  However, updating "yt-dlp" appears to work
(except for git-fetch not being supported yet).  The expression for the
signature-urls field had to be tweaked to not call uri-mirror-rewrite on #false.

* guix/gnu-maintenance.scm (latest-html-release)[url->research]{urls,signature-urls}:
Call uri-mirror-rewrite on the URLs.
---
 guix/gnu-maintenance.scm | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/guix/gnu-maintenance.scm b/guix/gnu-maintenance.scm
index 84fd087319..2f09539d5d 100644
--- a/guix/gnu-maintenance.scm
+++ b/guix/gnu-maintenance.scm
@@ -532,9 +532,12 @@ (define (url->release url)
                (upstream-source
                 (package package)
                 (version version)
-                (urls (list url))
+                ;; uri-mirror-rewrite: Don't turn nice mirror:// URIs into ftp://
+                ;; URLs during "guix refresh -u".
+                (urls (list (uri-mirror-rewrite url)))
                 (signature-urls
-                 (list ((or file->signature file->signature/guess) url))))))))
+                 (and=> ((or file->signature file->signature/guess) url)
+                        (lambda (url) (list (uri-mirror-rewrite url))))))))))
 
     (define candidates
       (filter-map url->release links))
-- 
2.37.2