This builds a minimal Docker image of pyenv based off the fork at OblateSpheroid/pyenv. This fork has the "auto-install" option for when a Python version is referenced but not installed. The default behavior is to fail in this scenario.
To build a local image, run make build, or to set a new version (e.g., 1.x.x), make build VERSION=1.x.x.
Images are automatically built in the Docker Hub repo
for this image when a new version tag is pushed. The post build hook ensures that the latest tag in that repo always matches the
the most recently auto-built version.
To pull the most recent image: docker push oblatespheroid/pyenv
A Docker container launched from this image can run any Python command while specifying a version of Python.
This will download and install Python 3.6.10, then call the newly installed Python to print its version:
docker run --rm oblatespheroid/pyenv ash -lc "echo 3.6.10>.python-version && PYENV_AUTOINSTALL=1 python --version"
or from this folder, simply:
make run CMD="echo 3.6.10>.python-version && python --version"