mysql_info: add server_engine return value (#649)

* mysql_info: add server_engine return value

* Incorporate feedback

changelogs/fragments/1-mysql_info.yml

@@ -0,0 +1,2 @@
+minor_changes:
+- mysql_info - return a database server engine used (https://github.com/ansible-collections/community.mysql/issues/644).

plugins/modules/mysql_info.py

@@ -162,6 +162,12 @@ EXAMPLES = r'''
 '''
 
 RETURN = r'''
+server_engine:
+  description: Database server engine.
+  returned: if not excluded by filter
+  type: str
+  sample: 'MariaDB'
+  version_added: '3.10.0'
 version:
   description: Database server version.
   returned: if not excluded by filter
@@ -765,6 +771,7 @@ def main():
     mysql = MySQL_Info(module, cursor, server_implementation, user_implementation)
 
     module.exit_json(changed=False,
+                     server_engine='MariaDB' if server_implementation == 'mariadb' else 'MySQL',
                      connector_name=connector_name,
                      connector_version=connector_version,
                      **mysql.get_info(filter_, exclude_fields, return_empty_dbs))

tests/integration/targets/test_mysql_info/tasks/main.yml

@@ -56,6 +56,7 @@
           - result.databases != {}
           - result.engines != {}
           - result.users != {}
+          - result.server_engine == 'MariaDB' or result.server_engine == 'MySQL'
 
     - name: mysql_info - Test connector informations display
       ansible.builtin.import_tasks: