setup.sh

#!/usr/bin/env bash
# setup.sh -- environment bootstrapper for python virtualenv

set -euo pipefail

SUDO=sudo
if ! command -v $SUDO; then
	echo no sudo on this system, proceeding as current user
	SUDO=""
fi

if command -v apt-get; then
	if dpkg --status python3-venv > /dev/null; then
		echo "python3-venv is installed, skipping setup"
	else
		if ! apt info python3-venv; then
			echo package info not found, trying apt update
			$SUDO apt-get -qq update
		fi
		$SUDO apt-get install -qqy python3-venv
	fi
else
	echo Skipping tool installation because your platform is missing apt-get.
	echo If you see failures below, install the equivalent of python3-venv for your system.
fi

source .env
if [ -f $VIRTUAL_ENV/.install_complete ]; then
	echo "completion marker is present, skipping virtualenv setup"
else
	echo creating virtualenv at $VIRTUAL_ENV
	python3 -m venv $VIRTUAL_ENV
	echo installing dependencies from requirements.txt
	$VIRTUAL_ENV/bin/pip install -r requirements.txt
	touch $VIRTUAL_ENV/.install_complete
fi