[bug#74058] [PATCH 1/2] gnu: postgresql-configuration: Set default postgresql to #f.

[Nicolas Graves]

* gnu/services/databases.scm (postgresql-configuration)[postgresql]:
Set default to #f.
(postgresql-services): Revert default to postgresql-10 (rationale: We
can remove this service at the same time than postgresql-10, in
something like 6 months to a year).
---
 gnu/services/databases.scm | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/gnu/services/databases.scm b/gnu/services/databases.scm
index 0933eb5e79..f8ae085339 100644
--- a/gnu/services/databases.scm
+++ b/gnu/services/databases.scm
@@ -167,8 +167,12 @@ (define contents
 (define-record-type* <postgresql-configuration>
   postgresql-configuration make-postgresql-configuration
   postgresql-configuration?
-  (postgresql         postgresql-configuration-postgresql ;file-like
-                      (default postgresql))
+  ;; Setting it to #f ensures that the user sets its current postgresql
+  ;; explicitely.  Since major upgrades currently require a manual migration
+  ;; of the database, this way the user is responsible for upgrading properly.
+  ;; MAYBE TODO: Write an action to automatically upgrade in Guix.
+  (postgresql         postgresql-configuration-postgresql ;file-like or #f
+                      (default #f))
   (port               postgresql-configuration-port
                       (default 5432))
   (locale             postgresql-configuration-locale
@@ -346,7 +350,7 @@ (define postgresql-service-type
    (default-value (postgresql-configuration))
    (description "Run the PostgreSQL database server.")))
 
-(define-deprecated (postgresql-service #:key (postgresql postgresql)
+(define-deprecated (postgresql-service #:key (postgresql postgresql-10)
                                        (port 5432)
                                        (locale "en_US.utf8")
                                        (config-file (postgresql-config-file))
-- 
2.46.0