remove unused inputs from the graph

src/jflow/workflow.py

@@ -335,24 +335,38 @@ class Workflow(threading.Thread):
 
     def get_execution_graph(self):
         gr = digraph()
+        # build a all_nodes table to store all nodes
+        all_nodes = {}
         for ioparameter in self.__dict__.values():
             if issubclass(ioparameter.__class__, InputFile):
                 gr.add_node(ioparameter.name)
                 gr.add_node_attribute(ioparameter.name, self.INPUT_GRAPH_LABEL)
+                all_nodes[ioparameter.name] = None
             elif issubclass(ioparameter.__class__, InputFileList):
                 gr.add_node(ioparameter.name)
                 gr.add_node_attribute(ioparameter.name, self.INPUTS_GRAPH_LABEL)
+                all_nodes[ioparameter.name] = None
         for cpt in self.components:
             gr.add_node(cpt.get_nameid())
             gr.add_node_attribute(cpt.get_nameid(), self.COMPONENT_GRAPH_LABEL)
+            all_nodes[cpt.get_nameid()] = None
         for cpt in self.components:
             for ioparameter in cpt.__dict__.values():
                 if issubclass( ioparameter.__class__, InputFile ) or issubclass( ioparameter.__class__, InputFileList):
                     for parent in ioparameter.parent_linkTrace_nameid:
                         try: gr.add_edge((parent, ioparameter.linkTrace_nameid))
                         except: pass
+        # check if all nodes are connected
+        for edge in gr.edges():
+            if all_nodes.has_key(edge[0]):
+                del all_nodes[edge[0]]
+            if all_nodes.has_key(edge[1]):
+                del all_nodes[edge[1]]
+        # then remove all unconnected nodes: to delete inputs not defined by the user
+        for orphan_node in all_nodes.keys():
+            gr.del_node(orphan_node)
         return gr
-
+    
     def set_stderr(self):
         if hasattr(self, "stderr") and self.stderr is not None:
             os.rename( self.stderr, os.path.join(self.directory, str(time.time()) + "wf_stderr.old") )