[nobm] improve lauX.sh script, add support for a generic process madg…

…raph5#683

epochX/cudacpp/tlau/lauX.sh

@@ -7,23 +7,27 @@ set -e # fail on error
 
 function usage()
 {
-  echo "Usage: $0 <-FORTRAN|-CUDA|-CPP>"
+  echo "Usage:   $0 <-FORTRAN|-CUDA|-CPP> <procdir>"
+  echo "Example: $0 -CPP gg_tt.mad"
   exit 1
 }
 
 bckend=
+proc=
 while [ "$1" != "" ]; do
   if [ "$1" == "-FORTRAN" ] || [ "$1" == "-CUDA" ] || [ "$1" == "-CPP" ]; then
     if [ "$bckend" == "" ]; then bckend=${1/-/}; else echo "ERROR! Backend already set"; usage; fi
-    shift
+  elif [ "$proc" == "" ]; then
+    proc=$1
   else
-    echo "ERROR! Invalid option '$1'"
+    echo "ERROR! Invalid option '$1': process directory already set to '${proc}'"
     usage
   fi
+  shift
 done
 if [ "$bckend" == "" ]; then echo "ERROR! No backend was specified"; usage; fi
-
-proc=gg_tt.mad
+if [ "$proc" == "" ]; then echo "ERROR! No process directory was specified"; usage; fi
+if [ ! -d $proc ]; then echo "ERROR! Process directory '${proc}' does not exist"; usage; fi
 
 cd $(dirname $0)/..
 echo "Execute $(basename $0) for process ${proc} in directory $(pwd)"