BUILD_ARGS_SPEC="

	ARG_IPV4_ONLY:-4

	ARG_IPV6_ONLY:-6

	ARCH:arg:-a

	BUILD:arg:-b

	ARG_CLEAN:-c

	ARG_DEBUG_MINIPIX:--debug-minipix

	ARG_IGNORE_SHA256SUMS:-i

	ARG_OFFLINE:-N

	ARG_RELAXED:-R

	ARG_RESTART:arg:-r

	ARG_TARBALL:selfarg:-t

	ARG_TARBALL:selfarg:-t.bz2

	ARG_TARBALL:selfarg:-t.gz

	ARG_TARBALL:selfarg:-t.xz

	ARG_VERBOSE:-v

	ARG_XTRACE:-x";

ex_setup_args() {

	local _spec="${BUILD_ARGS_SPEC}" _spec_arg _found;

	while [ ${#} -gt 0 ]; do

		if [ "${1#-}" = "${1}" ]; then

			break;

		fi;

		for _spec_arg in ${_spec}; do

			case "${_spec_arg}" in

			*:${1})	case "${_spec_arg#*:}" in

				arg:*)

					ex_set_var_unsafe "${_spec_arg%%:*}" "${2}"; shift; ;;

				selfarg:*)

					ex_set_var_unsafe "${_spec_arg%%:*}" "${1}"; ;;

				*)

					ex_set_var_unsafe "${_spec_arg%%:*}" 1; ;;

				esac; _found=1; break; ;;

			*)	_found=0; ;;

			esac;

		done;

		if [ "${_found:-0}" -eq 0 ]; then

			exec cat etc/build.usage;

		else

			shift;

		fi;

	done;

	if [ -n "${ARG_TARBALL}" ]; then

		if [ "${ARG_TARBALL#-t.}" != "${ARG_TARBALL}" ]; then

			TARBALL_SUFFIX="${ARG_TARBALL#-t.}";

		else

			TARBALL_SUFFIX=xz;

		fi;

	fi;

	if [ "${ARG_XTRACE:-0}" -eq 1 ]; then

		set -o xtrace;

	fi;

	if [ -n "${ARG_RESTART}" ]; then

		if [ "${ARG_RESTART%:*}" != "${ARG_RESTART}" ]; then

			ARG_RESTART_AT="${ARG_RESTART#*:}"; ARG_RESTART="${ARG_RESTART%:*}";

		fi;

		BUILD_PACKAGES_RESTART="$(echo ${ARG_RESTART} | sed "s/,/ /g")";

	fi;

	while [ ${#} -gt 0 ]; do

	case "${1}" in

	*=*)	ex_set_var_unsafe "${1%%=*}" "${1#*=}"; ;;

	*)	BUILD_TARGETS_META="${BUILD_TARGETS_META:+${BUILD_TARGETS_META} }${1}"; ;;

	esac; shift; done;

};

# vim:filetype=sh