vms/ansible/roles/qemu/tasks/main.yml

- name: Load version information
  ansible.builtin.include_vars: "{{ item }}"
  loop:
    - "{{ role_path }}/vars/{{ ansible_facts['os_family'] }}.yml"
    - "{{ role_path }}/vars/{{ ansible_facts['distribution'] }}.yml"
    - "{{ role_path }}/vars/{{ ansible_facts['distribution'] }}_{{ ansible_facts['distribution_major_version'] }}.yml"
    - "{{ role_path }}/vars/{{ ansible_facts['distribution'] }}_{{ ansible_facts['distribution_version'] }}.yml"
  when: item is file

- name: Install qemu-guest-agent
  become: true
  ansible.builtin.package:
    name:
      - qemu-guest-agent
    state: present
  when: ansible_facts.distribution != 'NixOS'

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- when: ansible_facts.distribution == 'NixOS'
  block:
    - name: Tell the configuration to pick up guest agent
      ansible.builtin.replace:
        path: /etc/nixos/configuration.nix
        regexp: "\\./hardware-configuration\\.nix"
        replace: |
          ./hardware-configuration.nix
          ./guest-agent.nix

    - name: Create guest additions configuration
      ansible.builtin.copy:
        dest: /etc/nixos/guest-agent.nix
        owner: vagrant
        content: |
          {...}:
          {
            services.qemuGuest.enable = true;
          }
      notify: Rebuild nixos