feat(pretix): add ansible role and playbook

roles/pretix/defaults/main/main.yml

@@ -0,0 +1,14 @@
+---
+pretix_version: "2025.7.1"
+pretix_state: "present"
+pretix_deployment_method: "systemd"
+
+pretix_config_file: "/etc/pretix/pretix.cfg"
+pretix_config_file_owner: "{{ pretix_user_id }}"
+pretix_config_file_group: "{{ pretix_group_id }}"
+pretix_config_file_mode: "0640"
+pretix_config_dir: "{{ pretix_config_file | dirname }}"
+pretix_install_dir: "/var/lib/pretix"
+pretix_virtualenv_dir: "{{ pretix_install_dir }}/virtualenv"
+pretix_data_dir: "{{ pretix_install_dir }}/data"
+pretix_media_dir: "{{ pretix_data_dir }}/media"

roles/pretix/defaults/main/system_packages.yml

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+---
+pretix_debian_packages:
+  - "git"
+  - "build-essential"
+  - "python3-dev"
+  - "python3-venv"
+  - "python3"
+  - "python3-pip"
+  - "libxml2-dev"
+  - "libxslt1-dev"
+  - "libffi-dev"
+  - "zlib1g-dev"
+  - "libssl-dev"
+  - "gettext"
+  - "libpq-dev"
+  - "libjpeg-dev"
+  - "libopenjp2-7-dev"
+
+pretix_packages:
+  "debian":
+    "12": "{{ pretix_debian_packages }}"

roles/pretix/defaults/main/systemd.yml

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+---
+pretix_systemd_unit_description: "pretix web service"
+pretix_systemd_unit_after: "network.target"
+
+pretix_systemd_service_user: "{{ pretix_user }}"
+pretix_systemd_service_group: "{{ pretix_user }}"
+pretix_systemd_service_environment:
+  VIRTUAL_ENV: "{{ pretix_virtualenv_dir }}"
+pretix_systemd_service_working_directory: "{{ pretix_install_dir }}"
+pretix_systemd_service_exec_start: >-2
+  {{ pretix_virtualenv_dir }}/bin/gunicorn pretix.wsgi
+  --name pretix
+  --workers 5
+  --max-requests 100
+  --log-level=info
+  --bind=127.0.0.1:8345
+pretix_systemd_service_restart: "on-failure"
+
+pretix_systemd_install_wanted_by: "multi-user.target"

roles/pretix/defaults/main/user.yml

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+---
+pretix_user: "pretix"
+pretix_user_system: true
+pretix_user_create_home: false
+
+pretix_user_id: "{{ pretix_user_info.uid | default(pretix_user) }}"
+pretix_group_id: "{{ pretix_user_info.group | default(pretix_user) }}"

roles/pretix/defaults/main/virtualenv.yml

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+---
+pretix_virtualenv_state: "{{ pretix_state }}"
+pretix_virtualenv_packages:
+  - "pip"
+  - "setuptools"
+  - "wheel"
+  - "gunicorn"
+  - "pretix=={{ pretix_version }}"
+
+pretix_virtualenv_site_packages: false
+pretix_virtualenv_command: "virtualenv"