sync: minimise process spawning

Signed-off-by: Alejandro Mery <amery@geeks.cl>

sync.sh

@@ -2,9 +2,7 @@
 
 set -e
 cd "$(dirname "$0")"
-DIR="$PWD"
 
-cd "files"
-find ! -type d -exec "$DIR/sync2.sh" '{}' \;
+find -H files -print0 | xargs -r0 "$PWD/sync2.sh" -d "files"
 
-exec "$DIR/sync_ssh.sh"
+exec "$PWD/sync_ssh.sh"

sync2.sh

@@ -5,12 +5,23 @@ err() { echo "E: $$: $*" >&2; }
 
 set -u
 
-FILES="$(pwd -P)"
+if [ "x-d" = "x${1:-}" ]; then
+	BASE="$2"
+	shift 2
+else
+	BASE=.
+fi
+
+FILES="$(readlink -f "$BASE")"
 for x; do
 
 	# clean
 	#
-	x="${x#./}"
+	case "$x" in
+	"$BASE")   continue ;;
+	"$BASE"/*) x="${x#$BASE/}" ;;
+	./*)       x="${x#./}" ;;
+	esac
 
 	# find target (d1)
 	#