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

os-arch()
{
	local arch="$1"
	local os_arch

	case ${arch} in
		i*86|x86_64) os_arch="${arch}" ;;
		src|playground*) os_arch="$(source ${BUILDSERVER_CONFIG_DIR}/profiles/${BUILDROOT_PROFILE}/${arch}/mage.rc; echo ${ARCH})";;
	esac

	echo "${os_arch}"
}

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

	# only allow the right arches
	case ${arch} in
		i*86|x86_64) buildroot="${BUILDROOT}/${arch}"; os_arch="${arch}" ;;
		src) os_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 "${os_arch}" systemd-nspawn \
		--directory="${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/${arch}:/var/cache/mage/meta \
		--bind=/usr/lib/mage-buildserver/helper:/usr/lib/mage-buildserver \
		--bind=${BUILDROOT}/build-info/${arch}:/var/cache/mage-buildserver \
		--bind=${BUILDROOT}/ssh:/root/.ssh \
		bash --login "${script}" \
		|| die "runarch-script '${script}' for '${arch}' failed."

	# wait for container to exit
	sleep 1
}

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
}

runarch-pkg-install()
{
	local arch="$1"
	local pkg="$2"

	if [ ! -f ${BUILDROOT}/.stamps/"${arch}"_"${pkg}"-ok ]
	then
		runarch "${arch}" mage install "${pkg}" || die "${arch} install 'python'"
		touch ${BUILDROOT}/.stamps/"${arch}"_"${pkg}"-ok
	else
		echo "Warning: '${pkg}' already installed for arch '${arch}'"
	fi

	# never fail
	return 0
}

enum-build-arch-types()
{
	echo "${BUILD_ARCH[*]}"
}

enum-all-arch-types()
{
	local arch
	local build_arch_types

	for arch in src ${BUILD_ARCH[*]}
	do
		if [ ! -e ${BUILDSERVER_CONFIG_DIR}/profiles/${BUILDROOT_PROFILE}/${arch}/mage.rc ]
		then
			echo "Warning: mage.rc of '${arch}' not found. Arch '${arch}' ignored." >&2
		else
			build_arch_types+=( "${arch}" )
		fi
	done

	if [[ ${BUILD_PLAYGROUND} -eq 1 ]]
	then
		for arch in ${BUILD_ARCH[*]}
		do
			if [ ! -e ${BUILDSERVER_CONFIG_DIR}/profiles/${BUILDROOT_PROFILE}/playground-${arch}/mage.rc ]
			then
				echo "Warning: mage.rc of 'playground-${arch}' not found. Arch 'playground-${arch}' ignored." >&2
			else
				build_arch_types+=( "playground-${arch}" )
			fi
		done
	fi

	echo "${build_arch_types[*]}"
}