computer-playbook/roles/cleanup-backups-timer/tasks/main.yml

- name: create cleanup-backups.timer
  template:
    src:  "cleanup-backups.timer.j2"
    dest: "/etc/systemd/system/cleanup-backups.timer"
  register: cleanup_backups_timer
  changed_when: cleanup_backups_timer.changed or activate_all_timers | bool
  notify: restart cleanup-backups.timer
  when: run_once_cleanup_backups_timer is not defined

- name: run the cleanup_backups_timer tasks once
  set_fact:
    run_once_cleanup_backups_timer: true
  when: run_once_cleanup_backups_timer is not defined