---
# Copyright 2014, Rackspace US, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

- name: Generate hosts file records
  run_once: true
  set_fact:
    _etc_hosts_content: |-
      {% set records = [] %}
      {% for item in groups['all'] %}
      {%   set record = [] %}
      {%   set _target_rfc_name = item|replace('_', '-') %}
      {%   set _ans_hostname = hostvars[item]['ansible_hostname'] | default(_target_rfc_name) %}
      {%   set _ = record.append(hostvars[item]['ansible_host'] | default('127.0.0.1')) %}
      {%   set _ = record.append(_ans_hostname ~ '.' ~ openstack_domain) %}
      {%   set _ = record.append(_target_rfc_name) %}
      {%   if (_ans_hostname != _target_rfc_name) and (_target_rfc_name != item) %}
      {%     set _ = record.append(item) %}
      {%     set _ = record.append(_ans_hostname) %}
      {%   elif (_ans_hostname != _target_rfc_name) and (_target_rfc_name == item) %}
      {%     set _ = record.append(_ans_hostname) %}
      {%   elif (_ans_hostname == _target_rfc_name) and (_target_rfc_name != item) %}
      {%     set _ = record.append(item) %}
      {%   endif %}
      {%   set _ = records.append(record | join(' ')) %}
      {% endfor %}
      {{ records }}

- name: Update hosts file
  blockinfile:
    dest: /etc/hosts
    block: "{{ _etc_hosts_content | join('\n') }}"
    marker: "### {mark} OPENSTACK-ANSIBLE MANAGED BLOCK ###"