Example declarative metamodule for ansible

playbook.yaml

- name: Make sure only three files exist in /myfolder
  declarative:
    items:
    - a
    - b
    - c
    state:
      command: find /myfolder/ | tail -n +2 | basename
    extra_item:
      file:
        path: /myfolder/{{ item }}
        state: absent
    missing_item:
      file:
        path: /myfolder/{{ item }}
        state: touch