Scripts in bin: added -help to scripts

bin/foamCleanTutorials

@@ -3,7 +3,7 @@
 # =========                 |
 # \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
 #  \\    /   O peration     |
-#   \\  /    A nd           | Copyright (C) 2011 OpenFOAM Foundation
+#   \\  /    A nd           | Copyright (C) 2011-2017 OpenFOAM Foundation
 #    \\/     M anipulation  |
 #------------------------------------------------------------------------------
 # License
@@ -30,15 +30,34 @@
 #     and all its subdirectories.
 #
 #------------------------------------------------------------------------------
+Script=$PWD/${0##*/}
 
 # Source tutorial clean functions
-. $WM_PROJECT_DIR/bin/tools/CleanFunctions
+. "$WM_PROJECT_DIR/bin/tools/CleanFunctions"
 
-thisScript=$0
-if [ "/${thisScript#/}" != "$thisScript" ]
-then
-    thisScript="$PWD/$thisScript"
-fi
+usage() {
+    cat<<USAGE
+
+Usage: ${0##*/} [OPTIONS]
+options:
+  -help      | -h     help
+
+Helper script used by the Allclean scripts in the OpenFOAM tutorials
+USAGE
+}
+
+# Parse options
+while [ "$#" -gt 0 ]
+do
+    case "$1" in
+    -h | -help)
+        usage && exit 0
+        ;;
+    *)
+        break
+        ;;
+    esac
+done
 
 # If an argument is supplied do not execute ./Allwclean or ./Allclean
 # (to avoid recursion)
@@ -62,7 +81,7 @@ else
     # Recurse into subdirectories
     for caseName in *
     do
-        ( cd $caseName 2>/dev/null && $thisScript )
+        ( cd "$caseName" 2>/dev/null && $Script )
     done
 fi