#!/usr/bin/env bash

#

# Summary: Set or show the shell-specific Python version

#

# Usage: pyenv shell <version>

# pyenv shell --unset

#

# Sets a shell-specific Python version by setting the `PYENV_VERSION'

# environment variable in your shell. This version overrides local

# application-specific versions and the global version.

#

# <version> should be a string matching a Python version known to pyenv.

# The special version string `system' will use your default system Python.

# Run `pyenv versions' for a list of available Python versions.

set -e

[ -n "$PYENV_DEBUG" ] && set -x

# Provide pyenv completions

if [ "$1" = "--complete" ]; then

echo --unset

echo system

exec pyenv-versions --bare

fi

versions=("$@")

shell="$(basename "${PYENV_SHELL:-$SHELL}")"

if [ -z "$versions" ]; then

if [ -z "$PYENV_VERSION" ]; then

echo "pyenv: no shell-specific version configured" >&2

exit 1

else

echo "echo \"\$PYENV_VERSION\""

exit

fi

fi

if [ "$versions" = "--unset" ]; then

case "$shell" in

fish )

echo "set -e PYENV_VERSION"

;;

* )

echo "unset PYENV_VERSION"

;;

esac

exit

fi

# Make sure the specified version is installed.

if pyenv-prefix "${versions[@]}" >/dev/null; then

OLDIFS="$IFS"

IFS=: version="${versions[*]}"

IFS="$OLDIFS"

case "$shell" in

fish )

echo "setenv PYENV_VERSION \"${version}\""

;;

* )

echo "export PYENV_VERSION=\"${version}\""

;;

esac

else

echo "false"

exit 1

fi