simplify matrix_auto_join_users

roles/synapse/defaults/main.yml

@@ -8,3 +8,5 @@ synapse_psql_db: "{{ synapse_psql_user }}"
 matrix_max_upload_size_mb: 100
 synapse_metrics: false
 synapse_presence: true
+
+matrix_auto_join_rooms: []

roles/synapse/tasks/config.yml

@@ -29,6 +29,7 @@
     - listeners
     - server_name
     - url_preview
+    - autojoin
   notify: Config matrix target
 
 - name: Ensure synapse configs including secrets is in place
@@ -43,16 +44,6 @@
     - general
   notify: Config matrix target
 
-- name: Ensure autojoin config is in place
-  ansible.builtin.template:
-    src: conf.d/autojoin.yaml.j2
-    dest: /etc/matrix-synapse/conf.d/autojoin.yaml
-    owner: matrix-synapse
-    group: nogroup
-    mode: 0644
-  when: matrix_auto_join_rooms is defined
-  notify: Config matrix target
-
 - name: Ensure password provider config is in place
   ansible.builtin.template:
     src: conf.d/password_providers.yaml.j2

roles/synapse/templates/conf.d/autojoin.yaml.j2

@@ -1,6 +1,3 @@
 # {{ ansible_managed }}
 
-auto_join_rooms:
+auto_join_rooms: {{ matrix_auto_join_rooms }}
-{% for room_id in matrix_auto_join_rooms %}
-  - "{{ room_id }}"
-{% endfor %}