- name: Ensure tox is installed
  shell: |
    set -euo pipefail

    {% if tox_prefer_python2 %}
    if command -v pip; then
      PIP=pip
    elif command -v pip3; then
      PIP=pip3
    fi
    {% else %}
    if command -v pip3; then
      PIP=pip3
    elif command -v pip; then
      PIP=pip
    fi
    {% endif %}

    type tox || $PIP install --user tox
  args:
    executable: /bin/bash
  register: result
  changed_when: "'Successfully installed' in result.stdout"

- name: Set tox_executable fact
  set_fact:
    tox_executable: "{{ ansible_user_dir }}/.local/bin/tox"
    cacheable: true
  when: result is changed

- name: Output tox version
  command: "{{ tox_executable }} --version"