xbps-src: replace basename(1) with ${var##*/}.

Reduce number of fork+exec due to using a subshell to execute basename(1).

common/xbps-src/shutils/bulk.sh

@@ -1,7 +1,7 @@
 # vim: set ts=4 sw=4 et:
 
 bulk_getlink() {
-    local p="$(basename $1)"
+    local p="${1##*/}"
     local target="$(readlink $XBPS_SRCPKGDIR/$p)"
 
     if [ $? -eq 0 -a -n "$target" ]; then

common/xbps-src/shutils/common.sh

@@ -182,7 +182,7 @@ run_pkg_hooks() {
     eval unset -f hook
     for f in ${XBPS_COMMONDIR}/hooks/${phase}/*.sh; do
         [ ! -r $f ] && continue
-        hookn=$(basename $f)
+        hookn=${f##*/}
         hookn=${hookn%.sh}
         . $f
         run_func hook "$phase hook: $hookn" ${phase}_${hookn}

common/xbps-src/shutils/purge_distfiles.sh

@@ -75,7 +75,7 @@ purge_distfiles() {
 	hashes=($XBPS_SRCDISTDIR/by_sha256/*)
 	readonly HASHLEN=64
 	for file in ${hashes[@]}; do
-		hash_distfile=$(basename "$file")
+		hash_distfile=${file##*/}
 		hash=${hash_distfile:0:$HASHLEN}
 		[ -n "${my_hashes[$hash]}" ] && continue
 		inode=$(stat "$file" --printf "%i")

common/xbps-src/shutils/update_hash_cache.sh

@@ -6,7 +6,7 @@ update_hash_cache() {
     mkdir -p "$cache"
     find "$XBPS_SRCDISTDIR" -type f | grep -v by_sha256 | while read -r distfile; do
         cksum=$(cat "$distfile" | sha256sum | cut -d " " -f 1)
-        curfile="$(basename ${distfile})"
+        curfile="${distfile##*/}"
         ln -vf "$distfile" "${cache}/${cksum}_${curfile}"
     done
 }