die()
{
	echo "ERROR: $@"
	exit 1
}

runarch-script()
{
	local arch="$1"
	local script="$2"
	local buildroot

	# only allow the right arches
	case ${arch} in
		i*86|x86_64) buildroot="${BUILDROOT}/${arch}" ;;
		src) arch="$(source ${BUILDSERVER_CONFIG_DIR}/profiles/${BUILDROOT_PROFILE}/src/mage.rc; echo ${ARCH})"; buildroot="${BUILDROOT}/src" ;;
		*) die "unknown architecture '${arch}'" ;;
	esac

	[ -f ${buildroot}/${script} ] || die "'${buildroot}/${script}' does not exist."

	setarch "${arch}" systemd-nspawn \
		--directory="${buildroot}" \
		--bind=${BUILDROOT}/tmp/mage-tree:/usr/mage \
		--bind=${BUILDROOT}/svn/mage/include:/usr/mage/include \
		--bind=${BUILDROOT}/svn/mage/profiles:/usr/mage/profiles \
		--bind=${BUILDROOT}/svn/smage:/var/cache/mage/smage \
		--bind=${BUILDROOT}/packages/${arch}:/var/cache/mage/packages \
		--bind=${BUILDROOT}/packages/src:/var/cache/mage/src-packages \
		--bind=${BUILDROOT}/meta/${arch}:/var/cache/mage/meta \
		bash --login "${script}" \
		|| die "runarch-script '${script}' for '${arch}' failed."
}

runarch()
{
	local arch="$1"
	shift
	local cmd="$@"
	local buildroot
	local runrc

	# only allow the right arches
	case ${arch} in
		i*86|x86_64|src) buildroot="${BUILDROOT}/${arch}"; runrc="${buildroot}/.runrc" ;;
		*) die "unknown architecture '${arch}'" ;;
	esac

	# create runrc
	echo "${cmd}" > "${runrc}"
	runarch-script "${arch}" .runrc || die "runarch script execition of '${runrc}' failed."

	if [ -f "${runrc}" ]
	then
		rm "${runrc}"
	fi
}