---

- name: Install EPEL repository
  yum:
    conf_file: '/etc/yum.conf'
    name:
      - epel-release
    state: present
    update_cache: yes
  when: (ansible_facts['distribution'] == "CentOS" and ansible_facts['distribution_major_version'] == "7" and use_external_epel)

- name: Install ancillary packages for CentOS 7
  yum:
    conf_file: '/etc/yum.conf'
    name:
      - libselinux-python
      - python-pip
  when: (ansible_facts['distribution'] == "CentOS" and ansible_facts['distribution_major_version'] == "7")

- name: Install PostgreSQL {{ external_postgresql_version }} packages for CentOS 7
  yum:
    conf_file: '/etc/yum.conf'
    name: 
      - 'postgresql{{ external_postgresql_version | replace(".", "") }}'
      - 'postgresql{{ external_postgresql_version | replace(".", "") }}-server'
    state: present
  when: (ansible_facts['distribution'] == "CentOS" and ansible_facts['distribution_major_version'] == "7" and not use_distribution_postgresql)

- name: Install PostgreSQL 9.2 packages for CentOS 7
  yum:
    conf_file: '/etc/yum.conf'
    name:
      - postgresql
      - postgresql-server
    state: present
  when: (ansible_facts['distribution'] == "CentOS" and ansible_facts['distribution_major_version'] == "7" and use_distribution_postgresql)

- name: Install ancillary packages for CentOS 8
  dnf:
    conf_file: '/etc/dnf/dnf.conf'
    name:
      - python3-libselinux
      - python3-pip
    state: present
  when: (ansible_facts['distribution'] == "CentOS" and ansible_facts['distribution_major_version'] == "8")

- name: Disable the built-in PostgreSQL module
  command: dnf -qy module disable postgresql
  when: (ansible_facts['distribution'] == "CentOS" and ansible_facts['distribution_major_version'] == "8" and not use_distribution_postgresql)

- name: Install PostgreSQL {{ external_postgresql_version }} packages for CentOS 8
  dnf:
    conf_file: '/etc/dnf/dnf.conf'
    name:
      - 'postgresql{{ external_postgresql_version | replace(".", "") }}'
      - 'postgresql{{ external_postgresql_version | replace(".", "") }}-server'
    state: present
  when: (ansible_facts['distribution'] == "CentOS" and ansible_facts['distribution_major_version'] == "8" and not use_distribution_postgresql)

- name: Install PostgreSQL 10 packages for CentOS 8
  dnf:
    conf_file: '/etc/dnf/dnf.conf'
    name:
      - postgresql
      - postgresql-server
    state: present
  when: (ansible_facts['distribution'] == "CentOS" and ansible_facts['distribution_major_version'] == "8" and use_distribution_postgresql)

...