xbps-src: reduce basename(1) usage.

This saves a few exec()s.

common/build-style/fetch.sh

@@ -5,7 +5,8 @@ do_extract() {
 
 	mkdir -p ${wrksrc}
 	for f in ${distfiles}; do
-		curfile=$(basename "${f#*>}")
+		curfile="${f#*>}"
+		curfile="${curfile##*/}"
 		cp ${XBPS_SRCDISTDIR}/${pkgname}-${version}/${curfile} ${wrksrc}/${curfile}
 	done
 }

common/hooks/do-extract/00-distfiles.sh

@@ -3,6 +3,7 @@
 
 hook() {
 	local srcdir="$XBPS_SRCDISTDIR/$pkgname-$version"
+	local f j curfile found extractdir
 
 	if [ -z "$distfiles" -a -z "$checksum" ]; then
 		mkdir -p $wrksrc
@@ -11,7 +12,8 @@ hook() {
 
 	# Check that distfiles are there before anything else.
 	for f in ${distfiles}; do
-		curfile=$(basename "${f#*>}")
+		curfile="${f#*>}"
+		curfile="${curfile##*/}"
 		if [ ! -f $srcdir/$curfile ]; then
 			msg_error "$pkgver: cannot find ${curfile}, use 'xbps-src fetch' first.\n"
 		fi
@@ -24,7 +26,8 @@ hook() {
 	msg_normal "$pkgver: extracting distfile(s), please wait...\n"
 
 	for f in ${distfiles}; do
-		curfile=$(basename "${f#*>}")
+		curfile="${f#*>}"
+		curfile="${curfile##*/}"
 		for j in ${skip_extraction}; do
 			if [ "$curfile" = "$j" ]; then
 				found=1
@@ -122,7 +125,7 @@ hook() {
 			fi
 			;;
 		gem)
-			tar -xOf $srcdir/$curfile data.tar.gz | tar -xz -C $extractdir --transform="s,^,$(basename $wrksrc)/,"
+			tar -xOf $srcdir/$curfile data.tar.gz | tar -xz -C $extractdir --transform="s,^,${wrksrc##*/}/,"
 			if [ $? -ne 0 ]; then
 				msg_error "$pkgver: extracting $curfile into $XBPS_BUILDDIR.\n"
 			fi

common/hooks/do-fetch/00-distfiles.sh

@@ -212,8 +212,10 @@ hook() {
 
 	# Detect distfiles with obsolete checksum and purge them from the cache
 	for f in ${distfiles}; do
-		curfile=$(basename "${f#*>}")
+		curfile="${f#*>}"
+		curfile="${curfile##*/}"
 		distfile="$srcdir/$curfile"
+
 		if [ -f "$distfile" ]; then
 			cksum=$(get_cksum $curfile $dfcount)
 			if [ "${cksum:0:1}" = "@" ]; then
@@ -239,7 +241,8 @@ hook() {
 	# Download missing distfiles and verify their checksums
 	dfcount=0
 	for f in ${distfiles}; do
-		curfile=$(basename "${f#*>}")
+		curfile="${f#*>}"
+		curfile="${curfile##*/}"
 		distfile="$srcdir/$curfile"
 
 		# If file lock cannot be acquired wait until it's available.

common/xbps-src/shutils/show.sh

@@ -99,7 +99,8 @@ show_pkg_build_depends() {
             _pkgname="$f"
         fi
         _pkgname=${_pkgname/-32bit}
-        _srcpkg=$(basename $(readlink -f ${XBPS_SRCPKGDIR}/${_pkgname}))
+        _srcpkg=$(readlink -f ${XBPS_SRCPKGDIR}/${_pkgname})
+        _srcpkg=${_srcpkg##*/}
         echo "${_srcpkg}" >> $result
     done
     sort -u $result