---
# https://docs.docker.com/engine/install/centos/#os-requirements
- name: Enable the extras repo in RedHat family distros.
  ini_file:
    path: "{{ redhat_fam_extras_repo_file[ansible_distribution]\
              [ansible_distribution_major_version].repo }}"
    section: "{{ redhat_fam_extras_repo_file[ansible_distribution]\
                 [ansible_distribution_major_version].group }}"
    option: enabled
    value: 1
    mode: '0644'
    exclusive: true
    state: present
    backup: true
  become: true
  when: >
    ansible_distribution == "CentOS" or
    ( ansible_distribution == "RedHat" and
      ansible_distribution_major_version == "7" )

################################################################################
# Uninstall unwanted docker packages.
################################################################################

# https://docs.docker.com/engine/install/centos/#uninstall-old-versions
#
# We check if a docker repo has alredy been added to yum. If so, then we want to
# skip the removing of the old docker packages to make this script more
# idempotent.
- name: Check if docker repo has already been added.
  command: yum repolist  # noqa command-instead-of-module
  changed_when: false
  register: repolist

- name: Uninstall old versions of docker RedHat like distros.
  yum:
    name: "{{ docker_remove_old_packages[ansible_distribution] }}"
    state: absent
  become: true
  when: "'docker' not in repolist.stdout"

################################################################################
# Install dependencies
################################################################################

# https://docs.docker.com/engine/install/centos/#install-using-the-repository
- name: Install dependencies for yum distros.
  yum:
    name:
      - yum-utils
    state: present
  become: true

################################################################################
# Install docker repo.
################################################################################

# https://docs.docker.com/engine/install/centos/#install-using-the-repository
- name: Add docker yum repo for centos.
  command:
    cmd: "yum-config-manager --add-repo {{ redhat_fam_repo_url }}"
    creates: "{{ redhat_fam_docker_repo_full_path }}"
  become: true