#!/bin/sh

set -e

Setup ()
{
	DEFAULT="${1}"
	TARGET="${2}"

	mkdir -p "${DEFAULT}"
	mkdir -p "${TARGET}"

	if [ "${TARGET}" != "${DEFAULT}" ]
	then
		if [ -h "${DEFAULT}" ]
		then
			rm -f "${DEFAULT}"
			ln -s "${TARGET}" "${DEFAULT}"
		else
			if [ -e "${DEFAULT}" ] && find "${DEFAULT}" -maxdepth 0 -empty > /dev/null 2>&1
			then
				rmdir "${DEFAULT}"
				ln -s "${TARGET}" "${DEFAULT}"
			fi
		fi
	fi
}

case "${1}" in
	configure)
		update-alternatives --quiet --install /usr/share/container-tools/scripts/default container-tools_script /usr/share/container-tools/scripts/debootstrap 1000
		update-alternatives --quiet --install /usr/share/container-tools/scripts/default container-tools_script /usr/share/container-tools/scripts/debian 3000
		update-alternatives --quiet --install /usr/share/container-tools/scripts/default container-tools_script /usr/share/container-tools/scripts/progress-linux 2000

		. /usr/share/debconf/confmodule

		db_get open-infrastructure-container-tools/machines
		MACHINES="${RET:-/var/lib/machines}" # string (w/o empty)

		db_get open-infrastructure-container-tools/config
		CONFIG="${RET:-/etc/container-tools/config}" # string (w/o empty)

		db_get open-infrastructure-container-tools/debconf
		DEBCONF="${RET:-/etc/container-tools/debconf}" # string (w/o empty)

		db_get open-infrastructure-container-tools/cache
		CACHE="${RET:-/var/cache/container-tools}" # string (w/o empty)

		db_get open-infrastructure-container-tools/script
		SCRIPT="${RET:-debian}" # string (w/o empty)

		db_stop

		Setup "/var/lib/machines" "${MACHINES}"
		Setup "/etc/container-tools/config" "${CONFIG}"
		Setup "/etc/container-tools/debconf" "${DEBCONF}"
		Setup "/var/cache/container-tools" "${CACHE}"

		update-alternatives --quiet --set container-tools_script "/usr/share/container-tools/scripts/${SCRIPT}"
		;;

	abort-upgrade|abort-remove|abort-deconfigure)

		;;

	*)
		echo "postinst called with unknown argument \`${1}'" >&2
		exit 1
		;;
esac

#DEBHELPER#

exit 0