---
# Copyright 2018, 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.

# Set the available build targets for all nodes within an environment.
# build targets are grouped based on operating system and CPU
# architecture.
#
# This is the data structure used to determine the build host.
# venv_build_targets:
#   {
#     ansible_facts['distribution_version']: {
#       ansible_facts['architecture']: inventory_hostname
#     }
#   }
#
# Auto generation process:
# * The automatic build targets will iterate over the group name
#   "repo_all" and if any target is found it will catagorize it
#   using the distro and cpu architecture criteria.
# * If no group named "repo_all" is found the current inventory
#   hostname will be used as the only available build target.
# * If no build target is found for matching the distro and cpu
#   criteria of the active inventory item, the generator will fall
#   back to using the active inventory host as the build target.
#
# NOTE: (cloudnull): While there may be multiple inventory items
#                    that match a single distro and CPU architecture
#                    type, only one build target will ever be used.
#                    To make more than one build target effective,
#                    deployers should be using a shared file system
#                    for the repo servers.
venv_build_targets: |-
  {% set targets = {
      (ansible_facts['distribution_version'] | string): {
          (ansible_facts['architecture'] | string): (inventory_hostname | string)
      }
    }
  %}
  {% for item in ((groups['repo_all'] | default([inventory_hostname])) | reverse) %}
  {%   set distro = hostvars[item]['ansible_facts']['distribution_version'] %}
  {%   set arch = hostvars[item]['ansible_facts']['architecture'] %}
  {%   set target_item = {(arch | string): (item | string)} %}
  {%   set _ = targets.__setitem__(distro, target_item) %}
  {% endfor %}
  {{ targets }}

_venv_wheels_play_hosts: |
  {% set wheel_groups = {} %}
  {% for host in ansible_play_hosts %}
  {%   set arch = hostvars[host]['ansible_facts']['architecture'] %}
  {%   set distro = hostvars[host]['ansible_facts']['distribution_version'] %}
  {%   set distro_arch = [distro, arch] | join('_') %}
  {%   if distro_arch not in wheel_groups %}
  {%     set _ = wheel_groups.update({distro_arch: [host]}) %}
  {%   else %}
  {%     set _ = wheel_groups[distro_arch].append(host) %}
  {%   endif %}
  {% endfor %}
  {{ wheel_groups }}

_venv_wheels_first_play_hosts: |
  {% set first_hosts = [] %}
  {% for distro_arch_hosts in _venv_wheels_play_hosts.values() %}
  {%   set _ = first_hosts.append(distro_arch_hosts | first) %}
  {% endfor %}
  {{ first_hosts }}

_venv_pip_packages: "{{ (venv_default_pip_packages | union(venv_pip_packages)) | sort | select | list }}"

_venv_build_dist_arch: "{{ (ansible_facts['distribution'] | lower) | replace(' ', '_') }}-{{ ansible_facts['distribution_version'].split('.')[:2] | join('.') }}-{{ ansible_facts['architecture'] | lower }}"

_venv_build_requirements_prefix: "{{ venv_build_host_requirements_path }}/{{ venv_install_destination_path | basename }}"