Add (SQLite + Postgres) support and automatic migration to matrix-ma1sd

roles/matrix-ma1sd/tasks/setup_install.yml

@@ -15,6 +15,36 @@
 
 - import_tasks: "{{ role_path }}/tasks/migrate_mxisd.yml"
 
+
+# These (SQLite -> Postgres) migration tasks are usually at the top,
+# but we'd like to run them after `migrate_mxisd.yml`, which requires the ma1sd paths to exist.
+- set_fact:
+    matrix_ma1sd_requires_restart: false
+
+- block:
+    - name: Check if an SQLite database already exists
+      stat:
+        path: "{{ matrix_ma1sd_sqlite_database_path_local }}"
+      register: matrix_ma1sd_sqlite_database_path_local_stat_result
+
+    - block:
+        - set_fact:
+            matrix_postgres_db_migration_request:
+              src: "{{ matrix_ma1sd_sqlite_database_path_local }}"
+              dst: "{{ matrix_ma1sd_database_connection_string }}"
+              caller: "{{ role_path|basename }}"
+              engine_variable_name: 'matrix_ma1sd_database_engine'
+              engine_old: 'sqlite'
+              systemd_services_to_stop: ['matrix-ma1sd.service']
+              pgloader_options: ['--with "quote identifiers"']
+
+        - import_tasks: "roles/matrix-postgres/tasks/util/migrate_db_to_postgres.yml"
+
+        - set_fact:
+            matrix_ma1sd_requires_restart: true
+      when: "matrix_ma1sd_sqlite_database_path_local_stat_result.stat.exists|bool"
+  when: "matrix_ma1sd_database_engine == 'postgres'"
+
 - name: Ensure ma1sd image is pulled
   docker_image:
     name: "{{ matrix_ma1sd_docker_image }}"
@@ -102,3 +132,9 @@
   service:
     daemon_reload: yes
   when: "matrix_ma1sd_systemd_service_result.changed|bool"
+
+- name: Ensure matrix-ma1sd.service restarted, if necessary
+  service:
+    name: "matrix-ma1sd.service"
+    state: restarted
+  when: "matrix_ma1sd_requires_restart|bool"