---

- name: Register temporary docker container
  set_fact:
    container_command: "docker run -v '{{ postgres_data_dir | realpath }}:/var/lib/postgresql' centos:8 bash "

- name: Check for existing Postgres data (run from inside the container for access to file)
  shell:
    cmd: "{{ container_command }} [[ -f /var/lib/postgresql/10/data/PG_VERSION ]] && echo 'exists'"
  register: pg_version_file
  ignore_errors: true

- name: Record Postgres version
  shell: "{{ container_command }} cat var/lib/postgresql/10/data/PG_VERSION"
  register: old_pg_version
  when: pg_version_file.stdout == 'exists'

- name: Determine whether to upgrade postgres
  set_fact:
    upgrade_postgres: "{{ old_pg_version is defined and old_pg_version.stdout == '10' | bool }}"
  when: not old_pg_version.skipped | bool

- name: Stop AWX before upgrading postgres
  docker_service:
    project_src: "{{ docker_compose_dir }}"
    stopped: true
  when: upgrade_postgres | bool

- name: Upgrade Postgres
  shell: |
    docker run --rm \
      -v {{ postgres_data_dir | realpath }}:/var/lib/postgresql \
      -e PGUSER={{ pg_username }} -e POSTGRES_INITDB_ARGS="-U {{ pg_username }}" \
      tianon/postgres-upgrade:10-to-12 --username={{ pg_username }}
  when: upgrade_postgres | bool

- name: Copy old pg_hba.conf
  shell: "{{ container_command }} cp /var/lib/postgresql/10/data/pg_hba.conf /var/lib/postgresql/12/data/pg_hba.conf"
  when: upgrade_postgres | bool

- name: Remove old data directory
  shell: "{{ container_command }} rm -rf /var/lib/postgresql/10/data"
  when: compose_start_containers|bool