Ansible pyenv role

defaults-main.yml

---
pyenv_root: /opt/pyenv
pyenv_rcfiles: []
pyenv_versions: []
pyenv_global_version: system
pyenv_build_requirements:
  # https://github.com/pyenv/pyenv/wiki/Common-build-problems
  - zlib-devel
  - bzip2
  - bzip2-devel
  - readline-devel
  - sqlite
  - sqlite-devel
  - openssl-devel

tasks-main.yml

---
- include: pyenv.yml
- include: versions.yml

tasks-pyenv.yml

---
- name: pyenv requirements are installed
  yum:
    name: '{{ item }}'
    state: present
  with_items: '{{ pyenv_build_requirements }}'

- name: pyenv repo exists
  git:
    repo: https://github.com/pyenv/pyenv.git
    dest: '{{ pyenv_root }}'

- name: pyenv init commands are configured
  blockinfile:
    dest: '{{ item }}'
    create: yes
    content: |
      {{ lookup('template', 'templates/pyenv_init.j2') }}
  with_items: '{{ pyenv_rcfiles }}'

tasks-versions.yml

---
- name: pyenv temporal init script file is created
  tempfile:
    prefix: ansible.pyenv.init.
  register: tmp_pyenv_init
  changed_when: false

- name: pyenv temporal init commands are configured
  blockinfile:
    dest: '{{ tmp_pyenv_init.path }}'
    content: |
      {{ lookup('template', 'templates/pyenv_init.j2') }}
  changed_when: false

- name: installed python versions are checked
  shell: 'source {{ tmp_pyenv_init.path }} && pyenv versions --bare'
  changed_when: false
  register: tmp_pyenv_versions

- name: missing python versions are installed
  shell: 'source {{ tmp_pyenv_init.path }} && pyenv install {{ item }}'
  when: item not in tmp_pyenv_versions.stdout_lines
  with_items: '{{ pyenv_versions }}'

- name: global python version is checked
  shell: 'source {{ tmp_pyenv_init.path }} && pyenv global'
  changed_when: false
  register: tmp_pyenv_global_version

- name: global python version is set
  shell: 'source {{ tmp_pyenv_init.path }} && pyenv global {{ pyenv_global_version }}'
  when: pyenv_global_version != tmp_pyenv_global_version.stdout

- name: unused python versions are uninstalled
  shell: 'source {{ tmp_pyenv_init.path }} && pyenv uninstall -f {{ item }}'
  when: item not in pyenv_versions
  with_items: '{{ tmp_pyenv_versions.stdout_lines }}'

templates-pyenv_init.j2

# https://github.com/pyenv/pyenv#installation
export PYENV_ROOT="{{ pyenv_root }}"
export PATH="$PYENV_ROOT/bin:$PATH"
eval "$(pyenv init -)"