arch-install/roles/macos_01_hostname/tasks/main.yml

---
- name: Set hostname
  ansible.builtin.hostname:
    name: "{{ macos.hostname }}"
    use: macos

- name: Add entries to /etc/hosts
  ansible.builtin.lineinfile:
    path: /etc/hosts
    line: "{{ item }}"
    state: present
  with_items:
    - "{{ etc_hosts }}"
  become: true