[bug#62642] [PATCH] services: certbot: Fix nginx crash when certbot is used without domains

[Saku Laesvuori via Guix-patches via <guix-patches@gnu.org>]

* gnu/services/certbot.scm (certbot-nginx-server-configurations):
Don't return a broken nginx-server-configuration when no certificate
domains are configured.
---
 gnu/services/certbot.scm | 29 +++++++++++++++--------------
 1 file changed, 15 insertions(+), 14 deletions(-)

diff --git a/gnu/services/certbot.scm b/gnu/services/certbot.scm
index 8e6784df2b..3d9d207f8a 100644
--- a/gnu/services/certbot.scm
+++ b/gnu/services/certbot.scm
@@ -173,20 +173,21 @@ (define certbot-nginx-server-configurations
   (match-lambda
     (($ <certbot-configuration> package webroot certificates email
                                 server rsa-key-size default-location)
-     (list
-      (nginx-server-configuration
-       (listen '("80" "[::]:80"))
-       (ssl-certificate #f)
-       (ssl-certificate-key #f)
-       (server-name
-        (apply append (map certificate-configuration-domains certificates)))
-       (locations
-        (filter identity
-                (list
-                 (nginx-location-configuration
-                  (uri "/.well-known")
-                  (body (list (list "root " webroot ";"))))
-                 default-location))))))))
+     (if (null? certificates) '()
+       (list
+        (nginx-server-configuration
+        (listen '("80" "[::]:80"))
+        (ssl-certificate #f)
+        (ssl-certificate-key #f)
+        (server-name
+         (apply append (map certificate-configuration-domains certificates)))
+        (locations
+         (filter identity
+                 (list
+                  (nginx-location-configuration
+                   (uri "/.well-known")
+                   (body (list (list "root " webroot ";"))))
+                  default-location)))))))))
 
 (define certbot-service-type
   (service-type (name 'certbot)

base-commit: 2cf71e725d55bc5bf1ad663b7c696516299cc8a7
-- 
2.39.2