#!/bin/sh

## live-build(7) - System Build Scripts
## Copyright (C) 2016-2020 The Debian Live team
## Copyright (C) 2006-2015 Daniel Baumann <mail@daniel-baumann.ch>
##
## This program comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
## This is free software, and you are welcome to redistribute it
## under certain conditions; see COPYING for details.


set -e

# Including common functions
[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh

# Setting static variables
DESCRIPTION="Utility to build live systems"
HELP=""
USAGE="lb {clean|config|build}"

case "${1}" in
	-h|--help)
		if [ $(which man) ]; then
			man lb
		else
			${0} --usage
		fi
		exit 0
		;;

	""|-u|--usage)
		Usage
		;;

	-v|--version)
		echo "${VERSION}"
		exit 0
		;;
esac

COMMAND="${1}"
shift

ENV=""

if [ "${COMMAND}" != "config" ]; then
	# Checking user account
	if [ "$(id -u)" -ne "0" ]; then
		Echo_error "Root privileges needed!"
		exit 1
	fi
fi

for _FILE in config/environment config/environment.binary; do
	if [ -e "${_FILE}" ]; then
		ENV="${ENV} $(grep -v '^#' ${_FILE})"
	fi
done

if [ -x "${LIVE_BUILD}/scripts/build/${COMMAND}" ]; then
	# User has live-build copied locally in the system
	SCRIPT="${LIVE_BUILD}/scripts/build/${COMMAND}"
elif [ -x "local/live-build/scripts/build/${COMMAND}" ]; then
	# User has live-build copied locally in the config
	SCRIPT="local/live-build/scripts/build/${COMMAND}";
elif [ -x /usr/lib/live/build/${COMMAND} ]; then
	# User has live-build installed in the system
	SCRIPT=/usr/lib/live/build/"${COMMAND}"
elif [ $(which "${COMMAND}") ]; then
	# User has live-build commands in path
	SCRIPT="${COMMAND}"
else
	Echo_error "No such script: ${COMMAND}"
	exit 1
fi

Echo "[%s] %s" "$(date +'%F %T')" "lb ${COMMAND} $(echo ${@})"
${ENV} exec "${SCRIPT}" "${@}"