# postgres ~~ roles/postgres/tasks/main.yml
# postgresql database server

---

- name: ensure postgres is installed
  package:
    name: "{{ item }}" 
    state: present
  loop:
    - "postgresql-server"
    - "postgresql-contrib"

- name: ensure postgres directories exists
  file:
    path: "{{ postgres_dir }}/{{ item }}"
    owner: "{{ postgres_user }}"
    group: "{{ postgres_group }}"
    mode: "0750"
    state: directory
  loop:
    - ""
    - "data"

- name: delete default data dir if exists
  file:
    path: "{{ postgres_default_dir }}"
    state: absent
  when: postgres_dir != "/var/postgresql"

- name: link postgres directory to default one
  file:
    src: "{{ postgres_dir }}"
    dest: "{{ postgres_default_dir }}"
    owner: "{{ postgres_user }}"
    group: "{{ postgres_group }}"
    state: link
    mode: "0750"
    follow: false
  when: postgres_dir != "/var/postgresql"

  # NOTE: this tasks needs `pipelining` set to `false` to work correctly
- name: init postgres database
  shell: |
    su - _postgresql -c \
      'initdb -D "{{ postgres_dir }}/data/" -U "{{ postgres_dbuser }}" \
      --encoding=UTF-8 \
      --locale=en_US.UTF-8'
  args:
    chdir: "{{ postgres_dir }}"
  register: result
  failed_when: result.rc != 0 and result.stderr is defined and "exists but is not empty" not in result.stderr

- name: enable and restart postgres service
  service:
    name: postgresql
    state: restarted
    enabled: true