A simple idea to allow playbooks to control which bit of the role to run

roles/matrix-server/defaults/main.yml

@@ -284,3 +284,12 @@ matrix_ssl_use_staging: false
 
 # Specifies when to attempt to retrieve new SSL certificates from Let's Encrypt.
 matrix_ssl_renew_cron_time_definition: "15 4 */5 * *"
+
+# Variables to Control which parts of the role run.
+run_setup: true
+run_upgrade_postgres: true
+run_start: true
+run_register_user: true
+run_import_sqlite_db: true
+run_import_media_store: true
+run_self_check: true

roles/matrix-server/tasks/main.yml

@@ -1,29 +1,36 @@
 ---
 
 - include: tasks/setup/main.yml
+  when: run_setup
 
-# - include: tasks/upgrade_postgres.yml
-#   tags:
-#     - upgrade-postgres
+- include: tasks/upgrade_postgres.yml
+  tags:
+    - upgrade-postgres
+  when: run_upgrade_postgres
 
 - include: tasks/start.yml
   tags:
     - start
+  when: run_start
 
-# - include: tasks/register_user.yml
-#   tags:
-#     - register-user
+- include: tasks/register_user.yml
+  tags:
+    - register-user
+  when: run_register_user
 
-# - include: tasks/import_sqlite_db.yml
-#   tags:
-#     - import-sqlite-db
+- include: tasks/import_sqlite_db.yml
+  tags:
+    - import-sqlite-db
+  when: run_import_sqlite_db
 
-# - include: tasks/import_media_store.yml
-#   tags:
-#     - import-media-store
+- include: tasks/import_media_store.yml
+  tags:
+    - import-media-store
+  when: run_import_media_store
 
-# - include: tasks/self_check/main.yml
-#   delegate_to: 127.0.0.1
-#   become: false
-#   tags:
-#     - self-check
+- include: tasks/self_check/main.yml
+  delegate_to: 127.0.0.1
+  become: false
+  tags:
+    - self-check
+  when: run_self_check

roles/matrix-server/tasks/setup/main.yml

@@ -8,10 +8,10 @@
   tags:
     - setup-all
 
-# - include: tasks/setup/setup_ssl.yml
-#   tags:
-#     - setup-all
-#     - setup-ssl
+- include: tasks/setup/setup_ssl.yml
+  tags:
+    - setup-all
+    - setup-ssl
 
 - include: tasks/setup/setup_postgres.yml
   tags: