makepkg: treat lib{provides,depends} returns as proper arrays

Make these functions more whitespace space by treating newlines as the
element delimiter rather than every form of whitespace.

Signed-off-by: Dave Reisner <dreisner@archlinux.org>
Signed-off-by: Dan McGee <dan@archlinux.org>

scripts/makepkg.sh.in

@@ -1100,14 +1100,14 @@ find_libdepends() {
 
 find_libprovides() {
 	local libprovides missing
-	for p in ${provides[@]}; do
+	for p in "${provides[@]}"; do
 		missing=0
 		case "$p" in
 			*.so)
-				local filename=$(find "$pkgdir" -type f -name $p\*)
+				IFS=$'\n' read -rd '' -a filename < <(find "$pkgdir" -type f -name $p\*)
 				if [[ $filename ]]; then
 					# packages may provide multiple versions of the same library
-					for fn in ${filename[@]}; do
+					for fn in "${filename[@]}"; do
 						# check if we really have a shared object
 						if LC_ALL=C readelf -h "$fn" 2>/dev/null | grep -q '.*Type:.*DYN (Shared object file).*'; then
 							# get the string binaries link to (e.g. libfoo.so.1.2 -> libfoo.so.1)
@@ -1195,15 +1195,15 @@ write_pkginfo() {
 	[[ $optdepends ]] && printf "optdepend = %s\n" "${optdepends[@]//+([[:space:]])/ }"
 	[[ $conflicts ]]  && printf "conflict = %s\n"  "${conflicts[@]}"
 
-	provides=($(find_libprovides))
+	IFS=$'\n' read -rd '' -a provides < <(find_libprovides)
 	[[ $provides ]]   && printf "provides = %s\n"  "${provides[@]}"
 
 	[[ $backup ]]     && printf "backup = %s\n"    "${backup[@]}"
 
 
 	local it
-	libdepends=$(find_libdepends)
-	depends+=(${libdepends})
+	IFS=$'\n' read -rd '' -a libdepends < <(find_libdepends)
+	depends+=("${libdepends[@]}")
 
 	for it in "${depends[@]}"; do
 		if [[ $it = *.so ]]; then