---
- name: Set next release
  hosts: all
  tasks:
    - set_fact:
        release_index: "{{lookup('ansible.utils.index_of', data=lookup('vars', ansible_distribution+'_releases', default=[]), test='eq', value=ansible_distribution_release)}}"
    # If there is not a next release available (as defined below in Debian_releasess
    # or Ubuntu_releases), the execution of the playbook will fail at this step.
    - set_fact:
        next_release: "{{lookup('vars', ansible_distribution+'_releases')[release_index|int + 1]}}"
    - debug:
        msg: "Upgrading from {{ansible_distribution_release}} to {{next_release}}"
  vars:
    # 'stable' releases ordered from oldest to newest
    Debian_releases:
      - buster
      - bullseye
      - bookworm
    Ubuntu_releases:
      - focal
      - jammy
- name: Run any outstanding upgrades
  hosts: all
  tasks:
    - apt:
        update_cache: true
    - apt:
        upgrade: dist
    - apt:
        autoremove: true
        purge: true
- name: Pre-upgrade backups
  hosts: all
  tasks:
    - name: Check if /etc is a git repo
      register: etckeeper
      command:
        cmd: test -d /etc/.git
      ignore_errors: true
    - name: Tag etc configuration
      when: etckeeper.rc == 0
      block:
        - command:
            chdir: /etc
            argv:
              - git
              - tag
              - "pre-{{next_release}}"
        - command:
            chdir: /etc
            cmd: 'git gc --prune'
    - name: Backup package state
      block:
        - shell:
            cmd: "tar czf /var/backups/pre-{{next_release}}-backup.tgz /etc /var/lib/dpkg /var/lib/apt/extended_states"
            # Mitogen doesn't seem to work with the 'archive' module, since tarfile is
            # "present in the Mitogent importer blacklist", so a shell command is used
            # here instead
            warn: false
        - shell:
            cmd: "dpkg --get-selections '*' > /var/backups/dpkg-selections-pre-{{next_release}}.txt"
        - file:
            path: "{{item}}"
            mode: '0600'
          with_items:
            - "/var/backups/pre-{{next_release}}-backup.tgz"
            - "/var/backups/dpkg-selections-pre-{{next_release}}.txt"
- name: Update hostname
  hosts: all
  vars:
    # eg. ansible-playbook -e '{"UPDATE_HOSTNAME":true}' playbooks/release-upgrade.yml
    update_hostname: "{{lookup('vars', 'UPDATE_HOSTNAME', default='false')}}"
  tasks:
    - debug:
        msg: "update_hostname: {{update_hostname}}"
    - replace:
        path: /etc/hostname
        regexp: "{{ansible_distribution_release}}"
        replace: "{{next_release}}"
      when: update_hostname | bool
    - replace:
        path: /etc/hostname
        regexp: "deb{{ansible_distribution_version}}"
        replace: "deb{{ansible_distribution_version|int + 1 }}"
      when: update_hostname | bool and ansible_distribution == 'Debian'
- name: Debian major version upgrade
  hosts: all
  vars:
    apt_noninteractive_environment:
      DEBIAN_FRONTEND: noninteractive
      APT_LISTCHANGES_FRONTEND: mail
    apt_common_options: "-o Dpkg::Options::='--force-confdef' -o Dpkg::Options::='--force-confnew'"
  tasks:
    - import_tasks: ../tasks/debian_release_upgrade.yml
      when: ansible_distribution == 'Debian'
- name: Ubuntu major version upgrade
  hosts: all
  tasks:
    - name: Do release upgrade
      when: ansible_distribution == 'Ubuntu'
      command:
        cmd: 'do-release-upgrade -m server --frontend=DistUpgradeViewNonInteractive'
- name: Post-upgrade tasks
  hosts: all
  tasks:
    - name: Mark rsyslog as auto
      when: next_release == 'bookworm'
      command:
        cmd: 'apt-mark auto rsyslog'
    - name: Autoremove any packages
      apt:
        autoremove: true
        purge: true
    - name: Clean apt cache
      apt:
        autoclean: true