Support for borgmatic's mysql backup

defaults/main.yml

@@ -42,3 +42,4 @@ borgbackup_use_msmtp: true
 borgbackup_email_from: "notifications@oh14.de"
 borgbackup_interval: "hourly"
 borgbackup_chunker_params: "19,23,21,4095"
+borgbackup_mariadb_enable: false

templates/config.yaml.j2

 location:
   # List of source directories to backup. Globs are expanded.
-  source_directories:
-  {% for item in borgbackup_source_dirs %}
-  - {{ item }}
-  {% endfor %}
+  source_directories:  {{ borgbackup_source_dirs | to_nice_yaml }}
 
   # Paths to local or remote repositories.
   repositories:
@@ -33,3 +30,12 @@ consistency:
   - repository
   - archives
   check_last: 3
+
+{% if borgbackup_mariadb_enable %}
+hooks:
+  mysql_databases:
+    - name: all
+      username: {{ borgbackup_mariadb_user }}
+      password: {{ borgbackup_mariadb_password }}
+      options: "--single-transaction --quick"
+{% endif %}