Remove more hardcoded matrix-postgres references

roles/custom/matrix-bridge-appservice-kakaotalk/defaults/main.yml

@@ -90,7 +90,7 @@ matrix_appservice_kakaotalk_sqlite_database_path_in_container: "/data/appservice
 
 matrix_appservice_kakaotalk_database_username: 'matrix_appservice_kakaotalk'
 matrix_appservice_kakaotalk_database_password: 'some-password'
-matrix_appservice_kakaotalk_database_hostname: 'matrix-postgres'
+matrix_appservice_kakaotalk_database_hostname: ''
 matrix_appservice_kakaotalk_database_port: 5432
 matrix_appservice_kakaotalk_database_name: 'matrix_appservice_kakaotalk'
 

roles/custom/matrix-bridge-appservice-kakaotalk/tasks/validate_config.yml

@@ -1,10 +1,11 @@
 ---
 
-- name: Fail if required settings not defined
+- name: Fail if required appservice-kakaotalk settings not defined
   ansible.builtin.fail:
     msg: >-
-      You need to define a required configuration setting (`{{ item }}`).
-  when: "vars[item] == ''"
+      You need to define a required configuration setting (`{{ item.name }}`).
+  when: "item.when | bool and vars[item.name] == ''"
   with_items:
-    - "matrix_appservice_kakaotalk_appservice_token"
-    - "matrix_appservice_kakaotalk_homeserver_token"
+    - {'name': 'matrix_appservice_kakaotalk_appservice_token', when: true}
+    - {'name': 'matrix_appservice_kakaotalk_homeserver_token', when: true}
+    - {'name': 'matrix_appservice_kakaotalk_database_hostname', when: "{{ matrix_appservice_kakaotalk_database_engine == 'postgres' }}"}