---
# Copyright 2016, 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.

# This set of tasks checks whether the repo is up yet. If it is it
# will use it as the source for constraints and as the default index.
# If it is not yet up, then it will use the upstream upper constraints
# for the SHA currently pinned and will set the default index to pypi.

- name: Backup the default pip_upstream_url
  set_fact:
    __pip_upstream_url: "{{ pip_upstream_url }}"
  when:
    - __pip_upstream_url is not defined

- name: Backup the default pip_install_upper_constraints
  set_fact:
    __pip_install_upper_constraints: "{{ pip_install_upper_constraints }}"
  when:
    - __pip_install_upper_constraints is not defined

- name: Backup the default pip_default_index
  set_fact:
    __pip_default_index: "{{ pip_default_index }}"
  when:
    - __pip_default_index is not defined

- name: Test internal repo URL for the current get-pip.py script
  uri:
    url: "{{ __pip_upstream_url }}"
    method: "HEAD"
    timeout: 3
  register: _repo_data_check
  failed_when: false
  tags:
    - common-pip

- name: Test internal repo URL for the current upper constraints file
  uri:
    url: "{{ __pip_install_upper_constraints }}"
    method: "HEAD"
    timeout: 3
  register: upper_constraints_check
  failed_when: false
  tags:
    - common-constraints

- name: Test internal repo URL for the availability of the pypi index
  uri:
    url: "{{ __pip_default_index }}"
    method: "HEAD"
    timeout: 3
  register: pip_default_index_check
  failed_when: false
  tags:
    - common-constraints

- name: Remove global requirement pins file from host
  file:
    path: "/opt/global-requirement-pins.txt"
    state: absent
  when: (upper_constraints_check.status | default(503)) == 200
  tags:
    - common-constraints

- name: Copy global requirement pins file to host
  copy:
    src: "../global-requirement-pins.txt"
    dest: "/opt/global-requirement-pins.txt"
  when: (upper_constraints_check.status | default(503)) != 200
  tags:
    - common-constraints

# If we can't reach the internal repo, we need to ensure
# pip isn't locked to it.
- name: Set pip upstream URL
  set_fact:
    pip_upstream_url: >-
      {{ ((_repo_data_check.status | default(503)) != 200) | ternary('https://bootstrap.pypa.io/get-pip.py', __pip_upstream_url) }}
  tags:
    - common-pip

- name: Set pip install upper constraints
  set_fact:
    pip_install_upper_constraints: >-
      {{ ((upper_constraints_check.status | default(503)) != 200) | ternary(__upstream_constraints, __pip_install_upper_constraints) }}
  vars:
    # Use https when Python with native SNI support is available
    __pip_install_upper_constraints_proto: "{{ ansible_python_version | version_compare('2.7.9', '>=') | ternary('https','http') }}"
    __upstream_constraints: >-
      /opt/global-requirement-pins.txt
      --constraint {{ __pip_install_upper_constraints_proto }}://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt?id={{ requirements_git_install_branch | regex_replace(' #.*$','') }}

  tags:
    - common-constraints

- name: Fallback to PyPI
  set_fact:
    pip_default_index: >-
      {{ ((pip_default_index_check.status | default(503)) != 200) | ternary('https://pypi.python.org/simple', __pip_default_index) }}
  tags:
    - common-constraints