support external files in EventLoopGrid

Originally I had hoped to make this a more encompassing change, but
for now this was a lot simpler.

PhysicsAnalysis/D3PDTools/EventLoop/EventLoop/Job.h

@@ -436,6 +436,10 @@ namespace EL
     /// \}
 
 
+    /// a list of files that need to be available within the worker job
+    static const std::string optUserFiles;
+
+
 
     /// description: batch-specific options
     /// rationale: these options are for configuring batch drivers

PhysicsAnalysis/D3PDTools/EventLoop/Root/Job.cxx

@@ -102,6 +102,8 @@ namespace EL
   const std::string Job::optRetries = SH::MetaNames::openRetries();
   const std::string Job::optRetriesWait = SH::MetaNames::openRetriesWait();
 
+  const std::string Job::optUserFiles = "nc_EventLoop_UserFiles";
+
   const std::string Job::optMemResidentPerEventIncreaseLimit =
      "nc_resMemPerEventIncrease";
   const std::string Job::optMemVirtualPerEventIncreaseLimit =

PhysicsAnalysis/D3PDTools/EventLoopGrid/data/ELG_prun.py

@@ -96,7 +96,12 @@ def ELG_prun(sample) :
         import copy
         dummycmd = copy.deepcopy(cmd)
         dummycmd += ["--outTarBall=jobcontents.tgz"]
-        dummycmd += ["--extFile=jobdef.root,runjob.sh"]
+        if len(sample.meta().castString('nc_EventLoop_UserFiles')) :
+            dummycmd += ["--extFile=jobdef.root,runjob.sh," + ",".join (sample.meta().castString('nc_EventLoop_UserFiles'))]
+            pass
+        else :
+            dummycmd += ["--extFile=jobdef.root,runjob.sh"]
+            pass
         dummycmd += ["--noSubmit"]
 
         try: