# Depends on:
# - check.yml
---
- name: Check the /etc/hostname and compare it with HOSTNAME (This task can fail)
  shell: su -c '[ "$(cat /etc/hostname)" == '{{ HOSTNAME|quote|quote }}' ]'
  register: hostname_file
  ignore_errors: True
  changed_when: False
  when: HOSTNAME is defined

# If /etc/hostname doesn't match with HOSTNAME
- name: Rewrite /etc/hostname with HOSTNAME
  shell: echo {{ HOSTNAME|quote }} > /etc/hostname
  when: hostname_file|failed

- name: Check the actual hostname with `hostname` and compare it with HOSTNAME (This task can fail)
  shell: sh -c '[ "$(hostname)" == '{{ HOSTNAME|quote|quote }}' ]'
  register: actual_hostname
  ignore_errors: True
  changed_when: False
  when: HOSTNAME is defined

# If `hostname` doesn't match with HOSTNAME
- name: Change the hostname to HOSTNAME
  shell: hostname {{ HOSTNAME|quote }}
  when: actual_hostname|failed