ansible-sshd/tasks/install_config.yml

---
- name: Create the complete configuration file
  ansible.builtin.template:
    src: sshd_config.j2
    dest: "{{ sshd_config_file }}"
    owner: "{{ sshd_config_owner }}"
    group: "{{ sshd_config_group }}"
    mode: "{{ sshd_config_mode }}"
    validate: >-
      {% if sshd_test_hostkey is defined and sshd_test_hostkey.path is defined %}
        {{ sshd_binary }} -t -f %s -h {{ sshd_test_hostkey.path }}/rsa_key
      {% else %}
        {{ sshd_binary }} -t -f %s
      {% endif %}
    backup: "{{ sshd_backup }}"
  notify: reload_sshd

- name: Make sure the include path is present in the main sshd_config
  ansible.builtin.lineinfile:
    insertbefore: BOF
    line: "Include {{ __sshd_defaults['Include'] }}"
    path: "{{ __sshd_main_config_file }}"
    owner: "{{ sshd_config_owner }}"
    group: "{{ sshd_config_group }}"
    mode: "{{ sshd_config_mode }}"
    validate: >-
      {% if sshd_test_hostkey is defined and sshd_test_hostkey.path is defined %}
        {{ sshd_binary }} -t -f %s -h {{ sshd_test_hostkey.path }}/rsa_key
      {% else %}
        {{ sshd_binary }} -t -f %s
      {% endif %}
    backup: "{{ sshd_backup }}"
  notify: reload_sshd
  when:
    - __sshd_defaults['Include'] | d(false)
    - __sshd_main_config_file is not none
    - __sshd_drop_in_dir is not none
    - sshd_config_file.startswith(__sshd_drop_in_dir)