ansible-dhcpd/tasks/dist_vars.yml

---

- name: Include distribution specific variables
  ansible.builtin.include_vars:
    file: "{{ item }}"
    name: _os_specific
  with_first_found:
    - "{{ ansible_distribution_release }}.yml"
    - "{{ ansible_distribution }}.yml"
    - "{{ ansible_os_family }}.yml"
    - "default.yml"

- name: Set OS specific vars if undefined
  ansible.builtin.set_fact: {
    "{{ item.key }}":
      "{{ hostvars[inventory_hostname][item.key] | default(item.value) }}"
  }
  with_dict: "{{ _os_specific }}"