Allow to disable backup encryption

defaults/main.yml

@@ -47,3 +47,4 @@ borgbackup_interval: "hourly"
 borgbackup_chunker_params: "19,23,21,4095"
 borgbackup_mariadb_enable: false
 borgbackup_extra_borg_options: []
+borgbackup_enable_encryption: true

tasks/main.yml

@@ -41,7 +41,7 @@
 - name: Create Borg Repo
   ansible.builtin.command: "borg init -e repokey {{ borgbackup_target_user }}@{{ borgbackup_target_ip }}:{{ borgbackup_repo_path }}"
   environment:
-    BORG_PASSPHRASE: "{{ borgbackup_key }}"
+    BORG_PASSPHRASE: "{{ borgbackup_enable_encryption | ternary(borgbackup_key, '') }}"
   when: not repo.stat.exists
 
 - name: Install borgmatic  # noqa package-latest

templates/config.yaml.j2

@@ -21,7 +21,9 @@ location:
 
 storage:
   compression: {{ borgbackup_compression }}
+{% if borgbackup_enable_encryption %}
   encryption_passphrase: {{ borgbackup_key }}
+{% endif %}
   chunker_params: {{ borgbackup_chunker_params }}
 {% if borgbackup_extra_borg_options | length != 0 %}
   extra_borg_options: