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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_DEBUG_MINIPIX:--debug-minipix
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	ARG_IGNORE_SHA256SUMS:-i
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	ARG_OFFLINE:-N
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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:-v
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	ARG_VERBOSE2:-vv
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	ARG_VERBOSE3:-vvv
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	ARG_XTRACE:-x";
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ex_setup_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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			*:${1})	case "${_spec_arg#*:}" in
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				arg:*)
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					ex_set_var_unsafe "${_spec_arg%%:*}" "${2}"; shift; ;;
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				selfarg:*)
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					ex_set_var_unsafe "${_spec_arg%%:*}" "${1}"; ;;
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				*)
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					ex_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 "${ARG_TARBALL}" ]; then
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		if [ "${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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	if [ "${ARG_XTRACE:-0}" -eq 1 ]; then
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		set -o xtrace;
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	fi;
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	if [ "${ARG_VERBOSE3:-0}" -eq 1 ]; then
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		ARG_VERBOSE2=1;
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	fi;
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	if [ "${ARG_VERBOSE2:-0}" -eq 1 ]; then
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		ARG_VERBOSE=1;
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	fi;
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	if [ -n "${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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		fi;
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		BUILD_PACKAGES_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_set_var_unsafe "${1%%=*}" "${1#*=}"; ;;
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	*)	BUILD_TARGETS_META="${BUILD_TARGETS_META:+${BUILD_TARGETS_META} }${1}"; ;;
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	esac; shift; done;
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};
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# vim:filetype=sh