update splitter for stdin

files/split-q

@@ -6,6 +6,7 @@ _help() {
   echo ""
   echo "My default switches for split utility"
   echo "$CMD -b 500M FILE FILE."
+  echo "if you want to split using stdin, use --stdin pattern"
 }
 _helpexit() {
   _help
@@ -19,17 +20,32 @@ done
 
 args=( )
 for (( i=1; i<=$#; i++ )); do
+  j=$(( i + 1 ))
   test -f "${!i}" && {
     file="${!i}"
     # file found, remove from arguments
     set -- "${@:1:i-1}" "${@:i+1}"
   }
   [[ "${!i}" = "-b" ]] && SIZE_SET=1
+  [[ "${!i}" = "--stdin" ]] && {
+        PATTERN="${!j}";
+        set -- "${@:1:i-1}" "${@:i+2}"
+        i=$(( i + 1 ));
+        if [ -z "$PATTERN" ]; then echo must give pattern; exit 1; fi;
+
+   }
 done
 
 [[ "$SIZE_SET" -eq 1 ]] || {
   size="-b 500M"
 }
-test -f "$file" || { echo "No such file"; exit 1; }
-set -x
-pv "$file" | $CMD $size "$@" - "$file".
+
+if [[ -n "$PATTERN" ]]; then
+    set -x
+    cat - | pv | $CMD $size "$@" - "$PATTERN".
+    exit
+else
+    test -f "$file" || { echo "No such file"; exit 1; }
+    set -x
+    pv "$file" | $CMD $size "$@" - "$file".
+fi