---
# Copyright 2020, BBC R&D
#
# 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: Create sparse machines file
  command: "truncate -s 11G /var/lib/machines.raw"
  args:
    creates: /var/lib/machines.raw
  register: machines_create

- name: Format the machines file
  filesystem:
    fstype: ext4
    dev: /var/lib/machines.raw
  when:
    - machines_create is changed

- name: Create systemd mount
  import_role:
    name: systemd_mount
  vars:
    systemd_mounts:
      - what: '/var/lib/machines.raw'
        where: '/var/lib/machines'
        type: 'ext4'
        options: 'loop'
        unit:
          ConditionPathExists:
            - '/var/lib/machines.raw'
        state: 'started'
        enabled: true

- name: Remove the old image cache
  file:
    path: "/var/lib/machines/{{ lxc_container_base_name }}"
    state: absent
  when:
    - lxc_image_cache_refresh | bool

- name: Create new image cache directory
  file:
    path: "/var/lib/machines/{{ lxc_container_base_name }}"
    state: directory
  register: create_new_dir

- name: Tasks for image download
  when:
    - lxc_hosts_container_build_command | length == 0
  block:
    - name: Wait for base image download
      async_status:
        jid: "{{ prestage_image.ansible_job_id }}"
      register: _lxc_prestage_image_result
      until: _lxc_prestage_image_result.finished
      delay: 5
      retries: "{{ lxc_cache_prep_timeout | int // 5 }}"

    - name: Unpack base image
      unarchive:
        src: "/tmp/{{ cache_basename }}"
        dest: "/var/lib/machines/{{ lxc_container_base_name }}"
        remote_src: yes
      when: create_new_dir is changed

- name: Build the base image using a CLI tool
  command: "{{ lxc_hosts_container_build_command }}"
  when: lxc_hosts_container_build_command | length > 0