matrix-docker-ansible-deploy/roles/custom/matrix-client-hydrogen/tasks/validate_config.yml

---

- name: Fail if required Hydrogen settings not defined
  ansible.builtin.fail:
    msg: >
      You need to define a required configuration setting (`{{ item }}`) to use Hydrogen.
  when: "(vars[item] == '' or vars[item] is none) and matrix_client_hydrogen_container_image_self_build | bool"
  with_items:
    - "matrix_client_hydrogen_default_hs_url"

- when: matrix_client_hydrogen_container_labels_traefik_enabled | bool
  block:
    - name: Fail if required matrix-client-hydrogen Traefik settings not defined
      ansible.builtin.fail:
        msg: >-
          You need to define a required configuration setting (`{{ item }}`).
      when: "vars[item] == ''"
      with_items:
        - matrix_client_hydrogen_container_labels_traefik_hostname
        - matrix_client_hydrogen_container_labels_traefik_path_prefix

    # We ensure it doesn't end with a slash, because we handle both (slash and no-slash).
    # Knowing that `matrix_client_hydrogen_container_labels_traefik_path_prefix` does not end with a slash
    # ensures we know how to set these routes up without having to do "does it end with a slash" checks elsewhere.
    - name: Fail if matrix_client_hydrogen_container_labels_traefik_path_prefix ends with a slash
      ansible.builtin.fail:
        msg: >-
          matrix_client_hydrogen_container_labels_traefik_path_prefix (`{{ matrix_client_hydrogen_container_labels_traefik_path_prefix }}`) must either be `/` or not end with a slash (e.g. `/hydrogen`).
      when: "matrix_client_hydrogen_container_labels_traefik_path_prefix != '/' and matrix_client_hydrogen_container_labels_traefik_path_prefix[-1] == '/'"

    # For example, we're getting errors like this:
    # > main.js:51 Failed to load stylesheet from https://DOMAIN/assets/theme-element-light.5316e268.css:
    # despite having set a prefix of `/hydrogen`.
    # This is yet to be investigated and workaround around.
    - name: Fail if matrix_client_hydrogen_container_labels_traefik_path_prefix is not /
      ansible.builtin.fail:
        msg: >-
          matrix_client_hydrogen_container_labels_traefik_path_prefix can only be set to `/` right now.
          Serving Hydrogen from another path doesn't work just yet.
      when: "matrix_client_hydrogen_container_labels_traefik_path_prefix != '/'"