---
- name: Keep temporary old hostname in /etc/hosts
  lineinfile:
    dest=/etc/hosts
    regexp="^127\.0\.1\.1(.*)"
    line="127.0.1.1{{'\t'}}{{ hostname_name }}{% if hostname_name != hostname_fqdn %}{{'\t'}}{{ hostname_fqdn }}{% endif %}\1"
    state=present
    backup=yes
    backrefs=yes
  when: ansible_hostname != hostname_name
  tags: [configuration,hostname]

- name: Set hostname
  hostname: name={{ hostname_name }}
  when: hostname_name is defined
  tags: [configuration,hostname]

- name: Update /etc/hosts
  lineinfile:
    dest=/etc/hosts
    regexp="^127\.0\.1\.1"
    line="127.0.1.1{{'\t'}}{{ hostname_name }}{% if hostname_name != hostname_fqdn %}{{'\t'}}{{ hostname_fqdn }}{% endif %}"
    state=present
  tags: [configuration,hostname]