decomposePar: Added -noFields option

Patch contributed by Mattijs Janssens

applications/utilities/parallelProcessing/decomposePar/decomposePar.C

@@ -240,6 +240,11 @@ int main(int argc, char *argv[])
         "use existing geometry decomposition and convert fields only"
     );
     argList::addBoolOption
+    (
+        "noFields",
+        "opposite of -fields; only decompose geometry"
+    );
+    argList::addBoolOption
     (
         "noSets",
         "skip decomposing cellSets, faceSets, pointSets"
@@ -272,12 +277,29 @@ int main(int argc, char *argv[])
     bool copyZero                = args.optionFound("copyZero");
     bool copyUniform             = args.optionFound("copyUniform");
     bool decomposeFieldsOnly     = args.optionFound("fields");
+    bool decomposeGeomOnly       = args.optionFound("noFields");
     bool decomposeSets           = !args.optionFound("noSets");
     bool forceOverwrite          = args.optionFound("force");
     bool ifRequiredDecomposition = args.optionFound("ifRequired");
 
     const word dictName("decomposeParDict");
 
+
+    if (decomposeGeomOnly)
+    {
+        Info<< "Skipping decomposing fields"
+            << nl << endl;
+
+        if (decomposeFieldsOnly || copyZero)
+        {
+            FatalErrorInFunction
+                << "Cannot combine geometry-only decomposition (-noFields)"
+                << " with field decomposition (-noFields or -copyZero)"
+                << exit(FatalError);
+        }
+    }
+
+
     // Set time from database
     #include "createTime.H"
 
@@ -561,7 +583,7 @@ int main(int argc, char *argv[])
                 }
             }
         }
-        else
+        else if (!decomposeGeomOnly)
         {
             // Decompose the field files