best-match.sh
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best-match.sh
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	#!/bin/sh

	base=$1; shift
	target=$1; shift
	destination=$1; shift
	prefix=$1; shift

	best="0.0"
	candidates=$(ls -1 "${base}.rng" "${base}"-*.rng 2>/dev/null)
	for rng in ${candidates}; do
	case ${rng} in
	${base}-${target}.rng)
	best=${target}
	break
	;;
	next)
	: skipping ${rng}
	;;
	*)
	if [ "${rng}" = "${base}.rng" ]; then
	# special case for nvset.rng, no -0.1 around anyway
	v=0.1
	else
	v=$(echo ${rng} \| sed -e "s/${base}-//" -e 's/.rng//')
	fi
	: comparing ${v} with ${target}

	echo \| awk -v n1="${v}" -v n2="${best}" '{if (n1>n2) printf ("true"); else printf ("false");}' \| grep -q "true"
	if [ $? -eq 0 ]; then
	: ${v} beats the previous ${best} for ${target}
	if [ "${target}" = "next" ]; then
	best=${v}
	else
	echo \| awk -v n1="${v}" -v n2="${target}" '{if (n1<n2) printf ("true"); else printf ("false");}' \| grep -q "true"
	if [ $? -eq 0 ]; then
	: ${v} is still less than ${target}, using
	best=${v}
	fi
	fi
	fi
	;;
	esac
	done

	[ "${best}" != "0.0" ]; ec=$?
	if [ ${ec} -eq 0 ]; then
	if [ "${best}" = "0.1" ]; then
	found=${base}.rng
	else
	found=${base}-${best}.rng
	fi
	if [ "x${destination}" = "x" ]; then
	echo "${found}"
	else
	echo "${prefix}<externalRef href=\"${found}\"/>" >> "${destination}"
	fi
	fi
	ret () { return $1; }; ret ${ec}