cleaned up docker s3 volume restore

roles/docker_s3_volume_restore/defaults/main.yml

@@ -1,5 +1,8 @@
 ---
 # defaults file for docker_s3_volume_restore
+
+# forces a revert to the volume.
+docker_volume_s3_force: false
 docker_volume_s3_restores:
   - volume_name: "linkding_data"
     s3_key: "linkding_data/linkding_data-2022-09-01T21:32:54Z.tar.gz"

roles/docker_s3_volume_restore/tasks/main.yml

@@ -1,7 +1,21 @@
 ---
 # https://docs.ansible.com/ansible/latest/collections/community/docker/docker_container_module.html#ansible-collections-community-docker-docker-container-module
 # https://docs.docker.com/storage/volumes/#backup-restore-or-migrate-data-volumes
-#
+
+- name: Ensure Volume.
+  docker_volume:
+    name: "{{ item.volume_name }}"
+    state: present
+  register: volume_out
+  with_items: "{{ docker_volume_s3_restores }}"
+
+- name: Determine if backup is needed.
+  set_fact: should_perform_backup="{{ docker_volume_s3_force == true or volume_out.changed == true }}"
+
+- name: End play as no backup is needed.
+  meta: end_play
+  when: not should_perform_backup
+
 - name: Download archive from S3
   amazon.aws.aws_s3:
     bucket: "{{ aws_s3.bucket }}"
@@ -15,15 +29,6 @@
   register: get_out
   with_items: "{{ docker_volume_s3_restores }}"
 
-- debug: msg="{{ get_out }}"
-
-- name: Ensure Volume
-  docker_volume:
-    name: "{{ item.volume_name }}"
-    state: present
-  with_items: "{{ docker_volume_s3_restores }}"
-
-# TODO: skip if the volume was just created
 - name: Remove contents of volumes
   community.docker.docker_container:
     name: "restore-container-{{ item.volume_name }}-{{ 10 | random }}"
@@ -51,4 +56,3 @@
       - "{{ item.volume_name }}:/data"
       - /tmp:/tmp
   with_items: "{{ docker_volume_s3_restores }}"
-

roles/setup_hosted_services/defaults/main.yml

@@ -1,2 +1 @@
-null
-...
+---