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#
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# set -o noglob is assumed.
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#
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BUILD_ARGS_SPEC="
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	ARG_IPV4_ONLY:-4:
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	ARG_IPV6_ONLY:-6:
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	ARCH:arg:-a:
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	BUILD:arg:-b:
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	ARG_CLEAN:-c:
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	ARG_CLEAN_BUILDS:arg:-C:
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	ARG_AS_NEEDED:--as-needed:
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	ARG_DEBUG_MINIPIX:--debug-minipix:
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	ARG_OFFLINE:-N:
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	ARG_PACKAGE:-p:
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	ARG_PARALLEL:optarg:-P:auto
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	ARG_RELAXED:-R:
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	ARG_RESTART:arg:-r:
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	ARG_TARBALL:selfarg:-t:
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	ARG_TARBALL:selfarg:-t.bz2;
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	ARG_TARBALL:selfarg:-t.gz:
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	ARG_TARBALL:selfarg:-t.xz:
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	ARG_VERBOSE:selfarg:-v:
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	ARG_VERBOSE:selfarg:-vv:
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	ARG_VERBOSE:selfarg:-vvv:
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	ARG_XTRACE:-x:";
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build_args() {
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	local _spec="${BUILD_ARGS_SPEC}" _spec_arg _found;
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	while [ ${#} -gt 0 ]; do
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		if [ "${1#-}" = "${1}" ]; then
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			break;
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		fi;
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		for _spec_arg in ${_spec}; do
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			case "${_spec_arg}" in
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			*:${1}:*)
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				case "${_spec_arg#*:}" in
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				arg:*)
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					ex_rtl_set_var_unsafe "${_spec_arg%%:*}" "${2}"; shift; ;;
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				optarg:*)
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					if [ -n "${2}" ]\
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					&& [ "x${2#-}" = "x${2}" ]; then
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						ex_rtl_set_var_unsafe "${_spec_arg%%:*}" "${2}";
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						shift;
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					else
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						ex_rtl_set_var_unsafe "${_spec_arg%%:*}"	\
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							"${_spec_arg##*:}";
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					fi; ;;
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				selfarg:*)
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					ex_rtl_set_var_unsafe "${_spec_arg%%:*}" "${1}"; ;;
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				*)
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					ex_rtl_set_var_unsafe "${_spec_arg%%:*}" 1; ;;
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				esac; _found=1; break; ;;
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			*)	_found=0; ;;
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			esac;
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		done;
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		if [ "${_found:-0}" -eq 0 ]; then
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			exec cat etc/build.usage;
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		else
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			shift;
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		fi;
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	done;
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	if [ -n "${ARG_CLEAN_BUILDS}" ]; then
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		ARG_CLEAN_BUILDS="$(echo "${ARG_CLEAN_BUILDS}" | sed "s/,/ /g")";
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	fi;
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	if [ -n "${ARG_CLEAN_BUILDS}" ]\
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	|| [ "${ARG_PACKAGE:-0}" -eq 1 ]\
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	&& [ -n "${ARG_TARBALL}" ]; then
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		unset ARG_TARBALL;
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	elif [ -n "${ARG_TARBALL}" ]; then
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		if [ "${ARG_TARBALL#-t.}" != "${ARG_TARBALL}" ]; then
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			TARBALL_SUFFIX="${ARG_TARBALL#-t.}";
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		else
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			TARBALL_SUFFIX=xz;
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		fi;
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	fi;
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	case "${ARG_VERBOSE}" in
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	-v)	ARG_VERBOSE=1; ;;
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	-vv)	ARG_VERBOSE=2; ;;
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	-vvv)	ARG_VERBOSE=3; ;;
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	esac;
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	if [ "${ARG_XTRACE:-0}" -eq 1 ]; then
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		ARG_VERBOSE=2;
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	fi;
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	if [ -n "${ARG_RESTART}" ]; then
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		if [ "${ARG_RESTART%:*}" != "${ARG_RESTART}" ]; then
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			ARG_RESTART_AT="${ARG_RESTART#*:}"; ARG_RESTART="${ARG_RESTART%:*}";
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		else
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			ARG_RESTART_AT=ALL;
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		fi;
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		ARG_RESTART="$(echo "${ARG_RESTART}" | sed "s/,/ /g")";
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	fi;
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	while [ ${#} -gt 0 ]; do
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	case "${1}" in
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	*=*)	ex_rtl_set_var_unsafe "${1%%=*}" "${1#*=}"; ;;
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	*)	BUILD_TARGETS="${BUILD_TARGETS:+${BUILD_TARGETS} }${1}"; ;;
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	esac; shift; done;
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};
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# vim:filetype=sh