New roles for better modularity

roles/rear_backup_check/tasks/main.yml

@@ -0,0 +1,21 @@
+---
+- name: Check for backup log presence
+  ansible.builtin.stat:
+    path: "/var/log/rear/rear-{{ ansible_hostname }}.log"
+  register: rear_backup_log_presence
+
+- name: End host if ReaR backup already exists
+  when:
+    - rear_backup_log_presence['stat']['exists'] | bool
+    - not rear_force_backup | default(false) | bool
+  block:
+    - name: Validate ReaR backup completion
+      ansible.builtin.command:
+        cmd: "grep 'Finished running mkbackup workflow' /var/log/rear/rear-{{ ansible_hostname }}.log"
+      register: validate_backup_log
+      failed_when: validate_backup_log['rc'] not in [0,1]
+
+    - name: End play if ReaR already exists
+      ansible.builtin.meta: end_host
+      when:
+        - validate_backup_log['rc'] == 0