[bug#67072] [PATCH v2 3/4] weather: Use the same substitute URLs as guix-daemon.

["Ludovic Courtès" <ludo@gnu.org>]

* guix/scripts/weather.scm (%default-options): Remove ‘substitute-urls’.
(guix-weather): Call ‘substitute-urls’ when OPTS doesn’t have it.  Warn
when ‘substitute-urls’ returns #f.
* doc/guix.texi (Invoking guix weather): Adjust accordingly.

Change-Id: I3e9100074f2ad559e5c408660db70430d64f2bef
---
 doc/guix.texi            |  5 +++--
 guix/scripts/weather.scm | 12 +++++++++---
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/doc/guix.texi b/doc/guix.texi
index 1fd2e21608..74739c5392 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -16504,8 +16504,9 @@ Invoking guix weather
 @table @code
 @item --substitute-urls=@var{urls}
 @var{urls} is the space-separated list of substitute server URLs to
-query.  When this option is omitted, the default set of substitute
-servers is queried.
+query.  When this option is omitted, the URLs specified with the
+@option{--substitute-urls} option of @command{guix-daemon} are used or,
+as a last resort, the default set of substitute URLs.
 
 @item --system=@var{system}
 @itemx -s @var{system}
diff --git a/guix/scripts/weather.scm b/guix/scripts/weather.scm
index 140df3435f..7e302fcea7 100644
--- a/guix/scripts/weather.scm
+++ b/guix/scripts/weather.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2017-2022 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2017-2023 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2017 Ricardo Wurmus <rekado@elephly.net>
 ;;; Copyright © 2018 Kyle Meyer <kyle@kyleam.com>
 ;;; Copyright © 2020 Simon Tournier <zimon.toutoune@gmail.com>
@@ -391,7 +391,7 @@ (define %options
          %standard-native-build-options))
 
 (define %default-options
-  `((substitute-urls . ,%default-substitute-urls)))
+  '())
 
 (define (load-manifest file)
   "Load the manifest from FILE and return the list of packages it refers to."
@@ -582,7 +582,13 @@ (define-command (guix-weather . args)
       (let* ((opts     (parse-command-line args %options
                                            (list %default-options)
                                            #:build-options? #f))
-             (urls     (assoc-ref opts 'substitute-urls))
+             (urls     (or (assoc-ref opts 'substitute-urls)
+                           (with-store store
+                             (substitute-urls store))
+                           (begin
+                             (warning (G_ "could not determine current \
+substitute URLs; using defaults~%"))
+                             %default-substitute-urls)))
              (systems  (match (filter-map (match-lambda
                                             (('system . system) system)
                                             (_ #f))
-- 
2.41.0