matrix-docker-ansible-deploy/roles/custom/matrix_playbook_migration/tasks/migrate_matrix_mailer.yml

---

# This migrates the mailer from the old path (`/matrix/mailer`) to the new path (`/matrix/exim-relay`, controlled by `exim_relay_base_path`),
# and from the old hardcoded systemd service name (`matrix-mailer.service`) to the new one (`matrix-exim-relay.service`, controlled by `exim_relay_identifier`).
#
# Here, we merely disable (and stop) the old systemd service and relocate the base directory path (`/matrix/mailer`).
# The exim-relay role itself (running later) will then ensure this data is up-to-date and will set up the new systemd service.

# It only makes sense to migrate if the identifier or path are different than the default (what we were using before).
- name: Check existence of matrix-mailer.service systemd service
  ansible.builtin.stat:
    path: "{{ devture_systemd_docker_base_systemd_path }}/matrix-mailer.service"
  register: matrix_mailer_service_stat

- when: matrix_mailer_service_stat.stat.exists | bool
  block:
    - name: Ensure matrix-mailer.service systemd service is stopped
      ansible.builtin.systemd:
        name: matrix-mailer
        state: stopped
        enabled: false
        daemon_reload: true

    - name: Ensure matrix-mailer directory relocated
      ansible.builtin.command:
        cmd: "mv {{ matrix_base_data_path }}/mailer {{ exim_relay_base_path }}"
        creates: "{{ exim_relay_base_path }}"
        removes: "{{ matrix_base_data_path }}"

    # Remove legacy env-mailer file (named `env` in the new role)
    - name: Ensure old exim-relay environment variables file is deleted
      ansible.builtin.file:
        path: "{{ exim_relay_base_path }}/env-mailer"
        state: absent

    - name: Ensure matrix-mailer.service systemd service doesn't exist
      ansible.builtin.file:
        path: "{{ devture_systemd_docker_base_systemd_path }}/matrix-mailer.service"
        state: absent