Merge pull request #267906 from talyz/keycloak-hostname-url

nixos/keycloak: Allow setting `hostname-url`

nixos/modules/services/web-apps/keycloak.nix

···
     maintainers
     catAttrs
     collect
-    splitString
     hasPrefix
     ;
 
···
             };
 
             hostname = mkOption {
-              type = str;
+              type = nullOr str;
+              default = null;
               example = "keycloak.example.com";
               description = lib.mdDoc ''
                 The hostname part of the public URL used as base for
···
 
       keycloakConfig = lib.generators.toKeyValue {
         mkKeyValue = lib.flip lib.generators.mkKeyValueDefault "=" {
-          mkValueString = v: with builtins;
+          mkValueString = v:
             if isInt v then toString v
             else if isString v then v
             else if true == v then "true"
···
           {
             assertion = createLocalPostgreSQL -> config.services.postgresql.settings.standard_conforming_strings or true;
             message = "Setting up a local PostgreSQL db for Keycloak requires `standard_conforming_strings` turned on to work reliably";
+          }
+          {
+            assertion = cfg.settings.hostname != null || cfg.settings.hostname-url or null != null;
+            message = "Setting the Keycloak hostname is required, see `services.keycloak.settings.hostname`";
+          }
+          {
+            assertion = !(cfg.settings.hostname != null && cfg.settings.hostname-url or null != null);
+            message = "`services.keycloak.settings.hostname` and `services.keycloak.settings.hostname-url` are mutually exclusive";
           }
         ];