---
# 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.

- name: Set mount facts
  set_fact:
    systemd_mount_suffix: "{{ (item.type == 'swap') | ternary('swap', 'mount') }}"
    systemd_mount_item: "{{ item.where | default(item.what) }}"

- name: Escape mount service file name
  command: systemd-escape -p --suffix="{{ systemd_mount_suffix }}" "{{ systemd_mount_item }}"
  changed_when: false
  register: mount_service_name

- name: Create mount target(s)
  file:
    path: "{{ item.where }}"
    state: directory
    owner: "{{ item.owner | default(omit) }}"
    group: "{{ item.group | default(omit) }}"
    mode: "0755"
  when:
    - item.where is defined
    - item.state | default('unknown') != 'absent'
    - item.type != 'swap'
  tags:
    - systemd-mount

- name: Create systemd mount services(s)
  config_template:
    src: "systemd-mount.j2"
    dest: "/etc/systemd/system/{{ mount_service_name.stdout }}"
    owner: "root"
    group: "root"
    mode: "0640"
    config_overrides: "{{ item.config_overrides | default({}) }}"
    config_type: "ini"
  when:
    - item.state | default('unknown') != 'absent'
  tags:
    - systemd-mount

- name: Load or Unload mount(s)
  systemd:
    daemon_reload: yes
    name: "{{ mount_service_name.stdout }}"
    enabled: "{{ item.enabled | default(true) }}"
  when:
    - item.state | default('unknown') != 'absent'

# NOTE(cloudnull): The systemd module is not used to start the
#                  mount because we don't want to inavertently
#                  "restart" a mount unnecessarily. To ensure
#                  we're able to load new options without
#                  requiring a mount restart the systemctl
#                  command is used with the "reload-or-restart"
#                  argument. Additionally this command escapes
#                  the name of the mount. If this command fails
#                  the task will be rescued and the regular
#                  systemd module will be attempted before
#                  failing the task run.
- name: Mount state block
  block:
    - name: Set the state of the mount
      shell: >-
        systemctl
        {{ systemd_mount_states[item.state] }}
        $(systemd-escape -p --suffix="{{ systemd_mount_suffix }}" "{{ systemd_mount_item }}")
      args:
        warn: no
      when:
        - item.state is defined
      tags:
        - skip_ansible_lint
  rescue:
    - name: Set the state of the mount (fallback)
      systemd:
        name: "{{ mount_service_name.stdout }}"
        state: "{{ item.state }}"

- name: Unload mount(s)
  systemd:
    daemon_reload: yes
    name: "{{ mount_service_name.stdout }}"
    enabled: false
    no_block: yes
  when:
    - item.state | default('unknown') == 'absent'
  notify: Remove mount