echoerr() { printf "\033[0;31m%s\033[0m" "$1" >&2 } ensure_python_build_installed() { if [ ! -f "$(python_build_path)" ]; then download_python_build fi } download_python_build() { echo "Downloading python-build..." local pyenv_url="https://github.com/pyenv/pyenv.git" git clone $pyenv_url "$(pyenv_path)" } python_build_path() { echo "$(pyenv_path)/plugins/python-build/bin/python-build" } pyenv_path() { echo "$(dirname $(dirname $0))/pyenv" }