parallel_parse: Check argument count before accessing arguments.

parallel_parse.sh

@@ -12,7 +12,12 @@ usage() {
   echo "    bin/apachedex --period week"
 }
 
-if [ $1 = '-h' -o $1 = '--help' ]; then
+if [ $# -lt 4 ]; then
+  usage
+  exit 1
+fi
+
+if [ "$1" = "-h" -o "$1" = "--help" ]; then
   usage
   exit 0
 fi
@@ -25,11 +30,6 @@ shift
 OUT_FILE=$1
 shift
 
-if [ $# -eq 0 ]; then
-  usage
-  exit 1
-fi
-
 # XXX: any simpler way ?
 xargs -0 -r -n 1 -P $PARALLELISM -I "@FILE@" -- "$SHELL" -c 'INFILE="$1";shift;STATE_DIR="$1";shift;echo -n .;"$@" -Q --format json --out "$STATE_DIR/$(sed s:/:@:g <<< "$INFILE").json" "$INFILE"' "$0" "@FILE@" "$STATE_DIR" "$@"
 echo