#!/usr/bin/env bash

set -e

# Here do not use `envsubst` because this command does not support the default values of bash variables.
function generate_env_from_env_sample() {
	if [[ ! -z "${1}" && -d "${1}" ]]; then
		local TARGET_DIRECTORY="${1}"
	else
		local TARGET_DIRECTORY="."
	fi

	if [[ ! -f "${TARGET_DIRECTORY}/.env.sample" ]]; then
		echo "Not found .env.sample file in the directory: ${TARGET_DIRECTORY}"
		exit -1
	fi

	cat "${TARGET_DIRECTORY}/.env.sample" |
		tr -s '\n' '\n' | sed '/^\s*#/d' | xargs -I {} sh -c 'eval echo {}'
}