feat(pretix): add ansible role and playbook

roles/pretix/tasks/prepare-systemd.yml

@@ -0,0 +1,30 @@
+---
+- name: Ensure ansible facts are collected
+  ansible.builtin.setup:
+    gather_subset:
+      - "!all"
+      - "pkg_mgr"
+      - "distribution"
+      - "distribution_release"
+      - "distribution_version"
+      - "distribution_major_version"
+
+- name: Ensure system packages are present (apt)
+  ansible.builtin.apt:
+    name: "{{ package }}"
+    state: "{{ pretix_state }}"
+  loop: "{{ pretix_packages[ansible_distribution | lower][ansible_distribution_major_version] }}"
+  loop_control:
+    loop_var: "package"
+  when: ansible_facts['pkg_mgr'] == 'apt'
+
+- name: Ensure systemd unit is present
+  ansible.builtin.template:
+    src: "pretix.service.j2"
+    dest: "{{ pretix_systemd_unit_file_path }}"
+  register: pretix_systemd_unit_info
+
+- name: Ensure systemd is reloaded
+  ansible.builtin.systemd_service:
+    daemon_reload: true
+  when: pretix_systemd_unit_info.changed