#!/bin/bash

if [ ! -z "$PYTHON_BIN_PATH" ]; then
	>&2 echo "PYTHON_BIN_PATH already set to $PYTHON_BIN_PATH"
	echo -n $PYTHON_BIN_PATH
else
	set +a
	set +e

	d=`mktemp -d`
	u=`dd if=/dev/urandom bs=16 count=1 2> /dev/null | hexdump -v -n 16 -e '1/1 "%02x"'`
	mkdir -p $d/$u
	cat <<EOF >> $d/setup.py
from setuptools import setup

setup(
	name="$u",
	version="0.0.0",
	packages=[
		"$u",
	],
	entry_points={
		"console_scripts": [
			"$u.bin=$u:main",
		],
	},
)
EOF

	cat <<EOF >> $d/$u/__init__.py
def main():
	pass
EOF

	pushd $d > /dev/null
	python3 setup.py --quiet sdist
	pip3 install -q dist/${u}-0.0.0.tar.gz
	p=`which $u.bin`
	pip3 uninstall -q -y $u
	export PYTHON_BIN_PATH=$(dirname $p)
	echo -n $PYTHON_BIN_PATH
	popd > /dev/null

	set -e
	set -a
fi