- name: Backup existing sources in /etc/apt
  copy:
    src: "{{ item }}"
    dest: "{{ item }}.bak"
    remote_src: yes
  loop: "{{ lookup('ansible.builtin.fileglob', '/etc/apt/sources.list.d/*.list') + ['/etc/apt/sources.list'] }}"
  when: item | file

- name: Update sources.list for new major version
  template:
    src: sources.list.j2
    dest: /etc/apt/sources.list
  vars:
    os_update_version_codename: "{{ new_version_codename }}" # Variable gets passed by main.yml task

- name: Update additional repositories in /etc/apt/sources.list.d
  lineinfile:
    path: "{{ item }}"
    regexp: '^(deb .* )({{ os_update_version_codename }})'
    line: '\1{{ new_version_codename }}'
  loop: "{{ lookup('ansible.builtin.fileglob', '/etc/apt/sources.list.d/*.list') }}"
  when: item | file

- name: Update apt cache
  apt:
    update_cache: yes

- name: Perform distribution upgrade
  apt:
    upgrade: yes
    allow_unauthenticated: yes
  notify:
    - Reboot system
    - apt cleanup