---
# 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: Verify that venv_install_destination_path has been provided
  fail:
    msg: |
      The variable venv_install_destination_path is required and
      has not been set.
  when:
    - venv_install_destination_path is not defined

- name: Collect the version of virtualenv
  shell: |
    virtualenv --version 2>/dev/null || echo 'none'
  args:
    executable: /bin/bash
  changed_when: false
  failed_when: false
  register: _virtualenv_version

- name: Collect the version of pip
  shell: |
    pip --version 2>/dev/null | awk '{print $2}' || echo 'none'
  args:
    executable: /bin/bash
  changed_when: false
  failed_when: false
  register: _pip_version

- name: Fail when required virtualenv version is not present
  fail:
    msg: >-
      The required virtualenv version is not present.
      The minimum version of 13.0.0 is required, but
      {{ _virtualenv_version.stdout }} is installed.
  when:
    - ((_virtualenv_version.stdout | trim) == 'none') or
      ((_virtualenv_version.stdout | trim) is version_compare('13.0.0', '<'))

- name: Fail when required pip version is not present
  fail:
    msg: >-
      The required virtualenv version is not present.
      The minimum version of 7.1 is required, but
      {{ _pip_version.stdout }} is installed.
  when:
    - ((_pip_version.stdout | trim) == 'none') or
      ((_pip_version.stdout | trim) is version_compare('7.1', '<'))

- name: Check whether the venv_install_source_path is a URL or a file path
  set_fact:
    _venv_source: "{{ ((venv_install_source_path | trim) is match('^https?://.*')) | ternary('url', 'file') }}"

- name: Check if venv tgz is present on the deployment host
  stat:
    path: "{{ venv_install_source_path }}/{{ venv_install_destination_path | basename }}.tgz"
    get_attributes: no
    get_checksum: no
    get_md5: no
    get_mime: no
  register: _src_venv_present
  delegate_to: localhost
  run_once: yes
  when:
    - _venv_source == 'file'