Convert .txt flux files to gsimple format for LArSoft compatability.

• Create a GSimpleNtpEntry.h and GSimpleNtpMeta.h files to define custom classes that handle entry and meta trees.
• Create a LinkDef.h file

// LinkDef.h
#ifdef __CINT__

#pragma link off all globals;
#pragma link off all classes;
#pragma link off all functions;

#pragma link C++ namespace genie;
#pragma link C++ namespace genie::flux;
#pragma link C++ class genie::flux::GSimpleNtpEntry+;
#pragma link C++ class genie::flux::GSimpleNtpMeta+;
#pragma link C++ class genie::flux::NeutrinoFileID+;

#endif

• Generate the dictionary

rootcling -f GSimpleNtpDict.cxx -c GSimpleNtpEntry.h GSimpleNtpMeta.h NeutrinoFileID.h LinkDef.h

• Compile script (you made need to repeat the above step if you have altered Neutrino):

g++ GSimpleNtpDict.cxx GSimple_LArSoftConvert.C NeutrinoFileID.cxx -o GSimple_LArSoftConvert `root-config --cflags --libs`

Or just run the build.sh script to run the above two steps.

• Execute script (amend path to input files and wobbling configuration to whatever you are using)

./GSimple_LArSoftConvert $WOB $NOUTPUTS /out/path/to/protodune_neutrinoflux.root ~/in/path/to/lightnu_fluxes_*

There is a helper bash script for running the executable: runNewProtoDUNEFluxProd.sh. WOB is the wobbling configuration and NOUTPUTS is the number of output gsimple files to split the flux file into.