markosamuli.pyenv

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Ansible role to install pyenv and pyenv-virtualenv on Ubuntu or macOS development machines.

Optionally, pyenv-virtualenvwrapper can be installed and used for managing environments.

Don't use this role on production servers as it supports installing pyenv only under user home directory.

Install from Homebrew on macOS

The default method to install pyenv and plugins on macOS is to use Homebrew.

The role doesn't know how to migrate from existing Homebrew installs to Git-based installations, so it will try to detect any existing installation and keep using the previous method.

If you want to migrate, backup and delete your existing ~/.pyenv directory before running this role.

Install from Homebrew on Linux

The role includes an experimental support for installing pyenv and plugins with Homebrew on Linux.

The role doesn't install Homebrew on Linux itself and expects it to be installed in the default /home/linuxbrew/.linuxbrew location.

Installing Python versions with pyenv on Linux when Homebrew installation exists has some known issues:

• readline extension was not compiled, installed pyenv by Linuxbrew on Ubuntu 16 #1479

Installed Python versions

This role installs Python versions defined in pyenv_python_versions variable.

To set global version, set pyenv_global variable to the desired version(s).

pyenv_global: "{{ pyenv_python37_version }} system"

This is configured to use latest Python 2 and Python 3 versions and the system version as default.

Changes to shell config files

This role creates config file in ~/.pyenv/.pyenvrc that is loaded in .bashrc and .zshrc files.

Code completion is loaded by default.

If you're managing your shell scripts .dotfiles or are using a framework, you should set pyenv_init_shell to false and update these files yourself to keep them clean.

Reference .bashrc configuration:

if [ -e "$HOME/.pyenv/.pyenvrc" ]; then
  source $HOME/.pyenv/.pyenvrc
  if [ -e "$HOME/.pyenv/completions/pyenv.bash" ]; then
    source $HOME/.pyenv/completions/pyenv.bash
  elif [ -e "/usr/local/opt/pyenv/completions/pyenv.bash" ]; then
    source /usr/local/opt/pyenv/completions/pyenv.bash
  fi
fi

Reference .zshrc configuration:

if [ -e "$HOME/.pyenv/.pyenvrc" ]; then
  source $HOME/.pyenv/.pyenvrc
  if [ -e "$HOME/.pyenv/completions/pyenv.zsh" ]; then
    source $HOME/.pyenv/completions/pyenv.zsh
  elif [ -e "/usr/local/opt/pyenv/completions/pyenv.zsh" ]; then
    source /usr/local/opt/pyenv/completions/pyenv.zsh
  fi
fi

Role Variables

Path to ~/.pyenv is based on environment variables:

pyenv_home: "{{ ansible_env.HOME }}"
pyenv_root: "{{ ansible_env.HOME }}/.pyenv"

Update .bashrc and .zshrc files in user home directory:

pyenv_init_shell: true

Versions to install:

pyenv_version: "v1.2.13"
pyenv_virtualenv_version: "v1.1.5"
pyenv_virtualenvwrapper_version: "v20140609"

Latest Python 3.7 and Python 3.8 versions:

pyenv_python37_version: "3.7.6"
pyenv_python38_version: "3.8.1"

Python 2 and Python 3 versions are installed by default:

pyenv_python_versions:
  - "{{ pyenv_python37_version }}"
  - "{{ pyenv_python38_version }}"

Set global version to Python 3.7 with system fallback:

pyenv_global: "{{ pyenv_python37_version }} system"

Install virtualenvwrapper plugin:

pyenv_virtualenvwrapper: false
pyenv_virtualenvwrapper_home: "{{ ansible_env.HOME }}/.virtualenvs"

Install using Homebrew package manager on macOS:

pyenv_install_from_package_manager: true

Detect existing installation method and use that:

pyenv_detect_existing_install: true

Install using Homebrew on Linux:

pyenv_homebrew_on_linux: true

Example Playbook

- hosts: localhost
  connection: local
  become: false
  roles:
    - role: markosamuli.pyenv

Updating versions

Run the following scripts to get latest releases from GitHub and update them in role defaults.

Update pyenv release:

./update-release pyenv

Update pyenv-virtualenv release:

./update-release pyenv-virtualenv

Update default Python 3.7 version:

./update-python python37

Update default Python 3.8 version:

./update-python python38

Update all versions:

make update

Coding style

Install pre-commit hooks and validate coding style:

make lint

Run tests

Run tests in Ubuntu and Debian using Docker:

make test

Acknowledgements

Use of .pyenvrc file and parts used for installing python version taken from avanov.pyenv role.

Development

Install development dependencies in a local virtualenv:

make setup

Install pre-commit hooks:

make install-git-hooks

Changes

• CHANGELOG.md

License

• MIT

Author Information

• @markosamuli