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

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

# This bits of code relies on the fact that we only accept
# options without values before the real command.
GLOBAL_ARGS=""
while true; do
	case $1 in
		-*)
			GLOBAL_ARGS="${GLOBAL_ARGS:+$GLOBAL_ARGS }$1"
			shift
			;;
		*)
			break
			;;
	esac
done
Arguments $GLOBAL_ARGS

if [ $# = 0 ]; then
	Echo_error "Missing sub-command"
	Usage --fail
fi

COMMAND="${1}"
shift

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}"
else
	Echo_error "Unknown command: ${COMMAND}"
	exit 1
fi

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

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

_CMD_LABEL="lb ${COMMAND}"
if [ "${_COLOR_OUT}" = "true" ]; then
	_CMD_LABEL="${CYAN}${_CMD_LABEL}${NO_COLOR}"
fi
Echo "[%s] ${_CMD_LABEL} %s" "$(date +'%F %T')" "$(echo ${GLOBAL_ARGS} ${@})"

exec /usr/bin/env ${ENV} "${SCRIPT}" ${GLOBAL_ARGS} "${@}"
