From d03e5fcf3b23d33d240acc356c3d5bd1f009d047 Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Sat, 2 Oct 2021 21:23:45 -0400
Subject: switch to arrays

The files we work with are supposed to be simple so this shouldn't
super matter, but now that newer bash and tools have options to
easily work with these, might as well switch over to fix quoting.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
 build-docbook-catalog | 33 +++++++++++++++++----------------
 1 file changed, 17 insertions(+), 16 deletions(-)

diff --git a/build-docbook-catalog b/build-docbook-catalog
index 0ecbc1c..b815bfc 100755
--- a/build-docbook-catalog
+++ b/build-docbook-catalog
@@ -14,7 +14,8 @@ ROOTCONFDIR="${EPREFIX}"/etc/xml
 ROOTCATALOG=${ROOTCONFDIR}/catalog
 CATALOG=${ROOTCONFDIR}/docbook
 DOCBOOKDIR="${EPREFIX}"/usr/share/sgml/docbook
-DTDS=
+DTDS=()
+SIMPLE_DTDS=()
 LATEST_DTD=
 LATEST_DATE=
 VERBOSE=false
@@ -56,7 +57,7 @@ main() {
 		shift
 	done
 
-	: ${ROOT:=/}
+	: "${ROOT:=/}"
 	[[ ${ROOT} != */ ]] && ROOT="${ROOT}/"
 	[[ ${ROOT} != /* ]] && ROOT="${PWD}${ROOT}"
 	if [[ ${ROOT} != "/" ]] ; then
@@ -88,11 +89,11 @@ main() {
 	clean_catalog "${DOCBOOKDIR}/xml\(-simple\)*-dtd-[^/\"']*/[^/\"']*" "${ROOTCATALOG}"
 
 	if set_dtds; then
-		for d in ${DTDS}; do
-			populate_dtd ${d}
+		for d in "${DTDS[@]}"; do
+			populate_dtd "${d}"
 		done
-		for d in ${SIMPLE_DTDS}; do
-			populate_simple_dtd ${d}
+		for d in "${SIMPLE_DTDS[@]}"; do
+			populate_simple_dtd "${d}"
 		done
 		populate_entities
 	fi
@@ -122,17 +123,17 @@ error() {
 # fill in the DTDS variable based on installed versions
 #
 set_dtds() {
-	DTDS= SIMPLE_DTS=
+	DTDS=() SIMPLE_DTDS=()
 
 	local d=${ROOT}${DOCBOOKDIR}
 	if [[ -d ${d} ]] ; then
 		pushd "${d}" >/dev/null || return 1
-		DTDS=$(find xml-dtd-*/ -name docbookx.dtd)
-		SIMPLE_DTDS=$(find xml-simple-dtd-*/ -name sdocbook.dtd)
-		popd >/dev/null
+		mapfile -d $'\0' DTDS < <(find xml-dtd-*/ -name docbookx.dtd -print0)
+		mapfile -d $'\0' SIMPLE_DTDS < <(find xml-simple-dtd-*/ -name sdocbook.dtd -print0)
+		popd >/dev/null || return 1
 	fi
 
-	if [[ -z ${DTDS} ]]; then
+	if [[ ${#DTDS[@]} -eq 0 ]]; then
 		echo "No installed DocBook XML DTDs found"
 		return 1
 	else
@@ -346,10 +347,10 @@ populate_entities() {
 	)
 
 	# here are the entities available; assume no spaces in filenames...
-	avail=($(ls "${ROOT}${isodir}" | sort))
+	mapfile -d $'\0' avail < <(find "${ROOT}${isodir}" -maxdepth 1 -type f -printf '%f\0' | sort -z)
 
 	# double-check the lists
-	verb "  Populating ${CATALOG} with ISO DocBook entities"
+	verb "  Populating ${CATALOG} with ${#avail[@]} ISO DocBook entities"
 	i=0 ; j=0
 	while [[ ${i} -lt ${#entities[@]} || ${j} -lt ${#avail[@]} ]]; do
 		if [[ ${i} -ge ${#entities[@]} ]]; then
@@ -358,13 +359,13 @@ populate_entities() {
 		elif [[ ${j} -ge ${#avail[@]} ]]; then
 			echo "Warning: Entities file not found: ${entities[i]}"
 			: $(( i += 2 ))
-		elif [[ ${avail[j]} < ${entities[i]} ]]; then
+		elif [[ ${avail[j]} < "${entities[i]}" ]]; then
 			echo "Warning: Extra ISO entities file: ${avail[j]}"
 			: $(( j += 1 ))
-		elif [[ ${entities[i]} < ${avail[j]} ]]; then
+		elif [[ ${entities[i]} < "${avail[j]}" ]]; then
 			echo "Warning: Entities file not found: ${entities[i]}"
 			: $(( i += 2 ))
-		elif [[ ${entities[i]} == ${avail[j]} ]]; then
+		elif [[ ${entities[i]} == "${avail[j]}" ]]; then
 			xmlcatalog --noout --add "public" "${entities[i+1]}" \
 				"file://${isodir}/${entities[i]}" "${ROOT}${CATALOG}"
 			: $(( j += 1 ))
-- 
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