roles/zfs/tasks/dataset-confirm-info.yml


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- name: Fetch ZFS dataset information
  community.general.zfs_facts:
    dataset: "{{ zfs_dataset }}"
  register: dataset_facts

- name: Fail if ZFS dataset contains child datasets
  ansible.builtin.fail:
    msg: "Dataset {{ zfs_dataset }} contains child datasets."
  when: dataset_facts.ansible_facts.ansible_zfs_datasets[0].usedbychildren != "0B"