skel.GENtoTXT.py

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#  Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
#
"""Functionality core of the Generate_tf transform"""
 
 
 
 
 
import ast
import os, re, string, subprocess
import AthenaCommon.AlgSequence as acas
import AthenaCommon.AppMgr as acam
from AthenaCommon.AthenaCommonFlags import jobproperties
from AthenaCommon.AthenaCommonFlags import athenaCommonFlags
from AthenaCommon.AthenaCommonFlags import jobproperties
 
from xAODEventInfoCnv.xAODEventInfoCnvConf import xAODMaker__EventInfoCnvAlg
acam.athMasterSeq += xAODMaker__EventInfoCnvAlg(xAODKey="TMPEvtInfo")
 
theApp = acam.theApp
acam.athMasterSeq += acas.AlgSequence("EvgenGenSeq")
genSeq = acam.athMasterSeq.EvgenGenSeq
acam.athMasterSeq += acas.AlgSequence("EvgenFixSeq")
fixSeq = acam.athMasterSeq.EvgenFixSeq
acam.athMasterSeq += acas.AlgSequence("EvgenPreFilterSeq")
prefiltSeq = acam.athMasterSeq.EvgenPreFilterSeq
acam.athMasterSeq += acas.AlgSequence("EvgenTestSeq")
testSeq = acam.athMasterSeq.EvgenTestSeq
 
from EvgenProdTools.LogicalExpressionFilter import LogicalExpressionFilter
acam.athMasterSeq += LogicalExpressionFilter("EvgenFilterSeq")
filtSeq = acam.athMasterSeq.EvgenFilterSeq
topSeq = acas.AlgSequence()
anaSeq = topSeq
topSeq += acas.AlgSequence("EvgenPostSeq")
postSeq = topSeq.EvgenPostSeq
 
 
 
import AthenaCommon.AtlasUnixGeneratorJob
include("PartPropSvc/PartPropSvc.py")
 
 
from PerfMonComps.PerfMonFlags import jobproperties as perfmonjp
perfmonjp.PerfMonFlags.doFastMonMT = True
 
from RngComps.RngCompsConf import AthRNGSvc
svcMgr += AthRNGSvc()
 
 
jobproperties.AthenaCommonFlags.AllowIgnoreConfigError = False
 
 
from AthenaCommon.Logging import logging
evgenLog = logging.getLogger('Gen_tf')
 
 
 
 
evgenLog.debug("****************** CHECKING EVENT GENERATION ARGS *****************")
evgenLog.debug(str(runArgs))
evgenLog.info ("****************** CHECKING EVENT GENERATION ARGS *****************")
 
# TODO: Allow generation without writing an output file (if outputEVNTFile is None)?
if not hasattr(runArgs, "ecmEnergy"):
    raise RuntimeError("No center of mass energy provided.")
else:
    evgenLog.info(' ecmEnergy = ' + str(runArgs.ecmEnergy) )
 
 
 
evgenLog.debug("****************** CONFIGURING MATRIX ELEMENT GENERATION *****************")
evgenLog.info("****************** CONFIGURING MATRIX ELEMENT GENERATION *****************")
 
 
from EvgenJobTransforms.EvgenConfig import evgenConfig
from GeneratorConfig.GenConfigHelpers import gens_known, gen_lhef, gens_lhef, gen_sortkey, gens_testhepmc, gens_notune, gen_require_steering
 
 
from EvgenProdTools.EvgenProdToolsConf import CountHepMC
if (runArgs.firstEvent <= 0):
   evgenLog.warning("Run argument firstEvent should be > 0")
 
svcMgr.EventSelector.FirstEvent = runArgs.firstEvent
theApp.EvtMax = -1
 
#evgenConfig.nEventsPerJob = 1
if not hasattr(postSeq, "CountHepMC"):
   postSeq += CountHepMC(InputEventInfo="TMPEvtInfo",
                         OutputEventInfo="EventInfo",
                         mcEventWeightsKey="")
 
postSeq.CountHepMC.FirstEvent = runArgs.firstEvent
postSeq.CountHepMC.CorrectHepMC = True
postSeq.CountHepMC.CorrectEventID = True
 
 
 
 
 
evgenLog.debug("****************** LOADING PRE-INCLUDES AND JOB CONFIG *****************")
evgenLog.info("****************** LOADING PRE-INCLUDES AND JOB CONFIG *****************")
 
 
if hasattr(runArgs, "preInclude"):
    for fragment in runArgs.preInclude:
        include(fragment)
 
 
if hasattr(runArgs, "preExec"):
    evgenLog.info("Transform pre-exec")
    for cmd in runArgs.preExec:
        evgenLog.info(cmd)
        exec(cmd)
 
def get_immediate_subdirectories(a_dir):
            return [name for name in os.listdir(a_dir)
                    if os.path.isdir(os.path.join(a_dir, name))]
 
        
# TODO: Explain!!!
def OutputTXTFile():
    outputTXTFile = None
    if hasattr(runArgs,"outputTXTFile"): outputTXTFile=runArgs.outputTXTFile
    return outputTXTFile
 
 
 
if len(runArgs.jobConfig) != 1:
    evgenLog.info("runArgs.jobConfig = " +  runArgs.jobConfig)
    evgenLog.error("You must supply one and only one jobConfig file argument. It has to start from mc. and end with .py")
    sys.exit(1)
 
print ("Using JOBOPTSEARCHPATH (as seen in skeleton) = '%s'" % (os.environ["JOBOPTSEARCHPATH"]))
FIRST_DIR = (os.environ['JOBOPTSEARCHPATH']).split(":")[0]
 
dsid_param = runArgs.jobConfig[0]
evgenLog.info("dsid_param = " + dsid_param)
dsid = os.path.basename(dsid_param)
evgenLog.info("dsid = " + dsid)
jofiles = [f for f in os.listdir(FIRST_DIR) if (f.startswith('mc') and f.endswith('.py'))]
 
if len(jofiles) !=1:
    evgenLog.info("runArgs.jobConfig wrong " + runArgs.jobConfig)
    evgenLog.error("You must supply one and only one jobOption file in DSID directory. It has to start with mc. and end with .py")
    sys.exit(1)
jofile = jofiles[0]
joparts = (os.path.basename(jofile)).split(".")
 
officialJO = False
if joparts[0].startswith("mc") and all(c in string.digits for c in joparts[0][2:]):
    officialJO = True
    
    if len(joparts) != 3:
        evgenLog.error(jofile + " name format is wrong: must be of the form MC<xx>.<physicsShort>.py: please rename.")
        sys.exit(1)
 
    
    jo_physshortpart = joparts[1]
    max_jo_physshort_length = 50
    if len(jo_physshortpart) > max_jo_physshort_length:
        evgenLog.error(f"{jofile} contains a physicsShort field of more than {max_jo_physshort_length} characters: please rename.")
        sys.exit(1)
    
    jo_physshortparts = jo_physshortpart.split("_")
    if len(jo_physshortparts) < 2:
        evgenLog.error(jofile + " has too few physicsShort fields separated by '_': should contain <generators>(_<tune+PDF_if_available>)_<process>. Please rename.")
        sys.exit(1)
    
    check_jofiles="/cvmfs/atlas.cern.ch/repo/sw/Generators/MC16JobOptions/scripts/check_jo_consistency.py"
    if os.path.exists(check_jofiles):
        evgenLog.info("Checking offical JO file name consistency")
        include(check_jofiles)
        check_naming(os.path.basename(jofile))
    else:
        evgenLog.warning("check_jo_consistency.py not found, will proceed without JOs consistency check")
#        sys.exit(1)
 
include(jofile)
include("EvgenJobTransforms/LHEonly.py")
 
 
 
 
evgenLog.debug("****************** CHECKING EVGEN CONFIGURATION *****************")
evgenLog.info("****************** CHECKING EVGEN CONFIGURATION *****************")
 
 
for opt in str(evgenConfig).split(os.linesep):
    evgenLog.info(opt)
evgenLog.info(".transform =                   Gen_tf")      
 
 
if evgenConfig.obsolete:
    evgenLog.error("JOs or icludes are obsolete, please check them")
    sys.exit(1)
 
if not evgenConfig.generators:
    evgenLog.error("No entries in evgenConfig.generators: invalid configuration, please check your JO")
    sys.exit(1)
 
if len(evgenConfig.generators) > len(set(evgenConfig.generators)):
    evgenLog.error("Duplicate entries in evgenConfig.generators: invalid configuration, please check your JO")
    sys.exit(1)
 
gennames = sorted(evgenConfig.generators, key=gen_sortkey)
 
if joparts[0].startswith("MC"): #< if this is an "official" JO
    genpart = jo_physshortparts[0]
    expectedgenpart = ''.join(gennames)
    
    expectedgenpart = expectedgenpart.replace("HerwigJimmy", "Herwig")
    def _norm(s):
        # TODO: add EvtGen to this normalization for MC14?
        return s.replace("Photospp", "").replace("Photos", "").replace("TauolaPP", "").replace("Tauolapp", "").replace("Tauola", "")
    def _norm2(s):
        return s.replace("Py", "Pythia").replace("MG","MadGraph").replace("Ph","Powheg").replace("Hpp","Herwigpp").replace("H7","Herwig7").replace("Sh","Sherpa").replace("Ag","Alpgen").replace("EG","EvtGen").replace("PG","ParticleGun").replace("Gva","Geneva")
        
    def _short2(s):
         return s.replace("Pythia","Py").replace("MadGraph","MG").replace("Powheg","Ph").replace("Herwigpp","Hpp").replace("Herwig7","H7").replace("Sherpa","Sh").replace("Alpgen","Ag").replace("EvtGen","EG").replace("PG","ParticleGun").replace("Geneva","Gva")
     
 
    if genpart != _norm(expectedgenpart)  and _norm2(genpart) != _norm(expectedgenpart):
        evgenLog.error("Expected first part of JO name to be '%s' or '%s', but found '%s'" % (_norm(expectedgenpart), _norm(_short2(expectedgenpart)), genpart))
        evgenLog.error("gennames '%s' " %(expectedgenpart))
        sys.exit(1)
 
    del _norm
    
    if not gens_notune(gennames) and len(jo_physshortparts) < 3:
        evgenLog.error(jofile + " with generators " + expectedgenpart +
                       " has too few physicsShort fields separated by '_'." +
                       " It should contain <generators>_<tune+PDF_<process>. Please rename.")
        sys.exit(1)
 
 
if gen_require_steering(gennames):
    if hasattr(runArgs, "outputEVNTFile") and not hasattr(runArgs, "outputEVNT_PreFile"):
        raise RuntimeError("'EvtGen' found in job options name, please set '--steering=afterburn'")
 
 
 
rounding = 0
if hasattr(runArgs,'inputGeneratorFile') and ',' in runArgs.inputGeneratorFile:   multiInput = runArgs.inputGeneratorFile.count(',')+1
else:
   multiInput = 0
 
# check if default nEventsPerJob used
if not evgenConfig.nEventsPerJob:
    evgenLog.info('#############################################################')
    evgenLog.info(' !!!! no nEventsPerJob set !!!  The default 10000 used. !!! ')
    evgenLog.info('#############################################################')
else:
    evgenLog.info(' nEventsPerJob set to ' + str(evgenConfig.nEventsPerJob)  )
    
if evgenConfig.minevents > 0 :
    raise RuntimeError("evgenConfig.minevents is obsolete and should be removed from the JOs")
   
if evgenConfig.nEventsPerJob < 1:
    raise RunTimeError("evgenConfig.nEventsPerJob must be at least 1")
else: 
    evgenLog.info("evgenConfig.nEventsPerJob = {}, but only {} (dummy) event(s) will be generated by Pythia8 for lhe-only production".format(evgenConfig.nEventsPerJob, postSeq.CountHepMC.RequestedOutput))
 
 
 
if not evgenConfig.keywords:
    evgenLog.warning("No entries in evgenConfig.keywords: invalid configuration, please check your JO !!")    
 
 
if evgenConfig.keywords:
    from GeneratorConfig.GenConfigHelpers import checkKeywords
    checkKeywords(evgenConfig, evgenLog, officialJO)
 
 
if not evgenConfig.categories:
    evgenLog.warning("No entries in evgenConfig.categories: invalid configuration, please check your JO !!")        
 
 
if evgenConfig.categories:
    
    lkwfile = "CategoryList.txt"
    lkwpath = None
    for p in os.environ["DATAPATH"].split(":"):
        lkwpath = os.path.join(p, lkwfile)
        if os.path.exists(lkwpath):
            break
        lkwpath = None
 
    allowed_cat = []
    if lkwpath:
        with open(lkwpath, 'r') as catlist:
            for line in catlist:
               allowed_list = ast.literal_eval(line)
               allowed_cat.append(allowed_list)
 
        
        bad_cat =[]
        it = iter(evgenConfig.categories)
        for x in it:
           l1 = x
           l2 = next(it)
           if "L1:" in l2 and "L2:" in l1:
               l1, l2 = l2, l1
           print("first",l1,"second",l2)
           bad_cat.extend([l1, l2])
           for a1,a2 in allowed_cat:
               if l1.strip().lower()==a1.strip().lower() and l2.strip().lower()==a2.strip().lower():
                 bad_cat=[]
           if bad_cat:
               msg = "evgenConfig.categories contains non-standard category: %s. " % ", ".join(bad_cat)
               msg += "Please check the allowed categories list and fix."
               evgenLog.error(msg)
               if officialJO:
                   sys.exit(1)
    else:
        evgenLog.warning("Could not find CategoryList.txt file %s in DATAPATH" % lkwfile)
 
 
dsid = os.path.basename(runArgs.jobConfig[0])
if not dsid.isdigit():
    dsid = "999999"
svcMgr.EventSelector.RunNumber = int(dsid)
 
 
from GeneratorConfig.Versioning import generatorsGetInitialVersionedDictionary, generatorsVersionedStringList
gendict = generatorsGetInitialVersionedDictionary(gennames)
gennamesvers = generatorsVersionedStringList(gendict)
 
import EventInfoMgt.EventInfoMgtInit
svcMgr.TagInfoMgr.ExtraTagValuePairs.update({"hepmc_version":"HepMC" + str(os.environ['HEPMCVER'])})
svcMgr.TagInfoMgr.ExtraTagValuePairs.update({"mc_channel_number":str(dsid)})
svcMgr.TagInfoMgr.ExtraTagValuePairs.update({"lhefGenerator": '+'.join( filter( gen_lhef, gennames ) ) })
svcMgr.TagInfoMgr.ExtraTagValuePairs.update({"generators": '+'.join(gennamesvers)})
svcMgr.TagInfoMgr.ExtraTagValuePairs.update({"evgenProcess": evgenConfig.process})
svcMgr.TagInfoMgr.ExtraTagValuePairs.update({"evgenTune": evgenConfig.tune})
if hasattr( evgenConfig, "hardPDF" ) : svcMgr.TagInfoMgr.ExtraTagValuePairs.update({"hardPDF": evgenConfig.hardPDF})
if hasattr( evgenConfig, "softPDF" ) : svcMgr.TagInfoMgr.ExtraTagValuePairs.update({"softPDF": evgenConfig.softPDF})
if hasattr( runArgs, "randomSeed") :  svcMgr.TagInfoMgr.ExtraTagValuePairs.update({"randomSeed": str(runArgs.randomSeed)})
svcMgr.TagInfoMgr.ExtraTagValuePairs.update({"keywords": ", ".join(evgenConfig.keywords).lower()})
 
# print version of HepMC to the log
evgenLog.info("HepMC version  " + str(os.environ['HEPMCVER']))
 
# Set AMITag in in-file metadata
from PyUtils import AMITagHelper
AMITagHelper.SetAMITag(runArgs=runArgs)
 
 
svcMgr.TagInfoMgr.ExtraTagValuePairs.update({"beam_energy": str(int(runArgs.ecmEnergy*Units.GeV/2.0))})
svcMgr.TagInfoMgr.ExtraTagValuePairs.update({"beam_type": 'collisions'})
 
 
include("EvgenJobTransforms/Generate_ecmenergies.py")
 
# Propagate DSID and seed to the generators
include("EvgenJobTransforms/Generate_dsid_ranseed.py")
 
 
if (hasattr( runArgs, "VERBOSE") and runArgs.VERBOSE ) or (hasattr( runArgs, "loglevel") and runArgs.loglevel == "DEBUG") or (hasattr( runArgs, "loglevel") and runArgs.loglevel == "VERBOSE"):
   include("EvgenJobTransforms/Generate_debug_level.py")
 
 
def checkBlackList(relFlavour,cache,generatorName) :
    isError = None
    with open('/cvmfs/atlas.cern.ch/repo/sw/Generators/MC16JobOptions/common/BlackList_caches.txt') as bfile:
        for line in bfile.readlines():
            if not line.strip():
                continue
            # Blacklisted release flavours
            badRelFlav=line.split(',')[0].strip()
            # Blacklisted caches
            badCache=line.split(',')[1].strip()
            # Blacklisted generators
            badGens=line.split(',')[2].strip()
 
            used_gens = ','.join(generatorName)
            #Match Generator and release type e.g. AtlasProduction, MCProd
            if relFlavour==badRelFlav and cache==badCache and re.search(badGens,used_gens) is not None:
                if badGens=="": badGens="all generators"
                isError=relFlavour+","+cache+" is blacklisted for " + badGens
                return isError  
    return isError
 
def checkPurpleList(relFlavour,cache,generatorName) :
    isError = None
    with open('/cvmfs/atlas.cern.ch/repo/sw/Generators/MC16JobOptions/common/PurpleList_generators.txt') as bfile:
        for line in bfile.readlines():
            if not line.strip():
                continue
            # Purple-listed release flavours  
            purpleRelFlav=line.split(',')[0].strip()
            # Purple-listed caches
            purpleCache=line.split(',')[1].strip()
            # Purple-listed generators
            purpleGens=line.split(',')[2].strip()
            # Purple-listed process
            purpleProcess=line.split(',')[3].strip()
    
            used_gens = ','.join(generatorName)
            #Match Generator and release type e.g. AtlasProduction, MCProd
            if relFlavour==purpleRelFlav and cache==purpleCache and re.search(purpleGens,used_gens) is not None:
                isError=relFlavour+","+cache+" is blacklisted for " + purpleGens + " if it uses " + purpleProcess 
                return isError
    return isError
 
 
evgenLog.debug("****************** CHECKING RELEASE IS NOT BLACKLISTED *****************")
rel = os.popen("echo $AtlasVersion").read()
rel = rel.strip()
if os.path.exists('/cvmfs/atlas.cern.ch/repo/sw/Generators/MC16JobOptions/common'):
   errorBL = checkBlackList("AthGeneration",rel,gennames)
   if (errorBL):
     if (hasattr( runArgs, "ignoreBlackList") and runArgs.ignoreBlackList): 
         evgenLog.warning("This run is blacklisted for this generator, please use a different one for production !! "+ errorBL )
     else:
         raise RuntimeError("This run is blacklisted for this generator, please use a different one !! "+ errorBL)   
      
   errorPL = checkPurpleList("AthGeneration",rel,gennames)
   if (errorPL):
      evgenLog.warning("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!")  
      evgenLog.warning("!!! WARNING  !!! "+ errorPL )
      evgenLog.warning("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!")
else:
   msg.waring("No access to cvmfs, so blacklisted runs will not be checked")
 
 
 
svcMgr.TagInfoMgr.ExtraTagValuePairs.update({"specialConfiguration": evgenConfig.specialConfig})
 
 
 
 
 
 
 
if hasattr(runArgs, "postInclude"):
    for fragment in runArgs.postInclude:
        include(fragment)
 
if hasattr(runArgs, "postExec"):
    evgenLog.info("Transform post-exec")
    for cmd in runArgs.postExec:
        evgenLog.info(cmd)
        exec(cmd)
        
 
acas.dumpMasterSequence()
 
 
 
 
 
evgenLog.debug("****************** HANDLING EVGEN INPUT FILES *****************")
print("****************** HANDLING EVGEN INPUT FILES *****************")
 
datFile = None
if "McAtNlo" in evgenConfig.generators and "Herwig" in evgenConfig.generators:
    datFile = "inparmMcAtNlo.dat"
elif "Alpgen" in evgenConfig.generators:
    datFile = "inparmAlpGen.dat"
elif "Protos" in evgenConfig.generators:
    datFile = "protos.dat"
elif "ProtosLHEF" in evgenConfig.generators:
    datFile = "protoslhef.dat"
elif "AcerMC" in evgenConfig.generators:
    datFile = "inparmAcerMC.dat"
elif "CompHep" in evgenConfig.generators:
    datFile = "inparmCompHep.dat"
 
 
if "Alpgen" in evgenConfig.generators:
   eventsFile = "alpgen.unw_events"
elif "Protos" in evgenConfig.generators:
   eventsFile = "protos.events"
elif "ProtosLHEF" in evgenConfig.generators:
   eventsFile = "protoslhef.events"
elif "BeamHaloGenerator" in evgenConfig.generators:
   eventsFile = "beamhalogen.events"
elif "HepMCAscii" in evgenConfig.generators:
   eventsFile = "events.hepmc"
elif "ReadMcAscii" in evgenConfig.generators:
    eventsFile = "events.hepmc"
elif gens_lhef(evgenConfig.generators):
   #eventsFile = outputTXTFile
   eventsFile = "events.lhe"
 
 
 
def find_unique_file(pattern):
    "Return a matching file, provided it is unique"
    import glob
    files = glob.glob(pattern)
    
    if not files:
        raise RuntimeError("No '%s' file found" % pattern)
    elif len(files) > 1:
        raise RuntimeError("More than one '%s' file found" % pattern)
    return files[0]
 
# This function merges a list of input LHE file to make one outputFile.  The header is taken from the first
# file, but the number of events is updated to equal the total number of events in all the input files
def merge_lhe_files(listOfFiles,outputFile):
    if(os.path.exists(outputFile)):
      print ("outputFile ",outputFile," already exists.  Will rename to ",outputFile,".OLD")
      os.rename(outputFile,outputFile+".OLD")
    output = open(outputFile,'w')
    holdHeader = ""
    nevents=0
    for file in listOfFiles:
       cmd = "grep /event "+file+" | wc -l"
       nevents+=int(subprocess.check_output(cmd,stderr=subprocess.STDOUT,shell=True))
 
    for file in listOfFiles:
       inHeader = True
       header = ""
       print ("*** Starting file ",file)
       for line in open(file,"r"):
 
          if("<event" in line and inHeader):
             inHeader = False
             if(len(holdHeader)<1):
                holdHeader = header
                output.write(header)
             output.write(line)
 
          elif(not inHeader and not ("</LesHouchesEvents>" in line)):
              output.write(line)
          if(inHeader):
 
             if("nevents" in line):
 
                tmp = line.split("=")
                line = line.replace(tmp[0],str(nevents))
             elif("numevts" in line):
 
                tmp = line.split(" ")
                nnn = str(nevents)
                line = line.replace(tmp[1],nnn)
             header+=line
    output.write("</LesHouchesEvents>\n")
    output.close()
 
def mk_symlink(srcfile, dstfile):
    "Make a symlink safely"
    if dstfile:
        if os.path.exists(dstfile) and not os.path.samefile(dstfile, srcfile):
            os.remove(dstfile)
        if not os.path.exists(dstfile):
            evgenLog.info("Symlinking %s to %s" % (srcfile, dstfile))
            os.symlink(srcfile, dstfile)
        else:
            evgenLog.debug("Symlinking: %s is already the same as %s" % (dstfile, srcfile))
 
 
if eventsFile or datFile:
    if not hasattr(runArgs, "inputGeneratorFile") or runArgs.inputGeneratorFile == "NONE":
        raise RuntimeError("%s needs input file (argument inputGeneratorFile)" % runArgs.jobConfig)
    if evgenConfig.inputfilecheck and not re.search(evgenConfig.inputfilecheck, runArgs.inputGeneratorFile):
        raise RuntimeError("inputGeneratorFile=%s is incompatible with inputfilecheck '%s' in %s" %
                           (runArgs.inputGeneratorFile, evgenConfig.inputfilecheck, runArgs.jobConfig))
    if datFile:
      if ".tar" in os.path.basename(runArgs.inputGeneratorFile):
        inputroot = os.path.basename(runArgs.inputGeneratorFile).split(".tar.")[0]
      else:
        inputroot = os.path.basename(runArgs.inputGeneratorFile).split("._")[0]
 
      realDatFile = find_unique_file('*%s*.dat' % inputroot)
      mk_symlink(realDatFile, datFile)
    if eventsFile:
        myinputfiles = runArgs.inputGeneratorFile
        genInputFiles = myinputfiles.split(',')
        numberOfFiles = len(genInputFiles)
        # if there is a single file, make a symlink.  If multiple files, merge them into one output eventsFile
        if(numberOfFiles<2):
           if ".tar" in os.path.basename(runArgs.inputGeneratorFile):
             inputroot = os.path.basename(runArgs.inputGeneratorFile).split(".tar.")[0]
           else:
             inputroot = os.path.basename(runArgs.inputGeneratorFile).split("._")[0]
 
           if "events" in inputroot :
               inputroot = inputroot.replace(".events","")
           realEventsFile = find_unique_file('*%s.*ev*ts' % inputroot)
           mk_symlink(realEventsFile, eventsFile)
        else:
           allFiles = []
           for file in genInputFiles:
#             Since we can have multiple files from the same task, inputroot must include more of the filename
#             to make it unique
              if ".tar" in os.path.basename(runArgs.inputGeneratorFile):
                inputroot = os.path.basename(runArgs.inputGeneratorFile).split(".tar.")[0]
              else:
                input0 = os.path.basename(file).split("._")[0]
                input1 = (os.path.basename(file).split("._")[1]).split(".")[0]
                inputroot = input0+"._"+input1
              realEventsFile = find_unique_file('*%s.*ev*ts' % inputroot)
#             The only input format where merging is permitted is LHE
              with open(realEventsFile, 'r') as f:
                 first_line = f.readline()
                 if(not ("LesHouche" in first_line)):
                    raise RuntimeError("%s is NOT a LesHouche file" % realEventsFile)
                 allFiles.append(realEventsFile)
           merge_lhe_files(allFiles,eventsFile)
 
else:
    if hasattr(runArgs, "inputGeneratorFile") and runArgs.inputGeneratorFile != "NONE":
        raise RuntimeError("inputGeneratorFile arg specified for %s, but generators %s do not require an input file" %
                           (runArgs.jobConfig, str(gennames)))
#    if evgenConfig.inputfilecheck:
#        raise RuntimeError("evgenConfig.inputfilecheck specified in %s, but generators %s do not require an input file" %
#                           (runArgs.jobConfig, str(gennames)))
 
 
if evgenConfig.auxfiles:
    from PyJobTransformsCore.trfutil import get_files
    get_files(evgenConfig.auxfiles, keepDir=False, errorIfNotFound=True)
    
 
 
def _checkattr(attr, required=False):
    if not hasattr(evgenConfig, attr) or not getattr(evgenConfig, attr):
        msg = "evgenConfig attribute '%s' not found." % attr
        if required:
            raise RuntimeError("Required " + msg)
        return False
    return True
# counting the number of events in LHE output
count_ev = 0
with open(eventsFile) as f:
    for line in f:
       count_ev += line.count('/event')
    
evgenLog.info('Requested output events = '+str(count_ev))
print("MetaData: %s = %s" % ("Number of produced LHE events ", count_ev))
 
if _checkattr("description", required=True):
    msg = evgenConfig.description
    if _checkattr("notes"):
        msg += " " + evgenConfig.notes
    print("MetaData: %s = %s" % ("physicsComment", msg))
if _checkattr("generators", required=True):
    print ("MetaData: %s = %s" % ("generatorName", "+".join(gennamesvers)))
if _checkattr("process"):
    print ("MetaData: %s = %s" % ("physicsProcess", evgenConfig.process))
if _checkattr("tune"):
    print ("MetaData: %s = %s" % ("generatorTune", evgenConfig.tune))
if _checkattr("hardPDF"):
    print ("MetaData: %s = %s" % ("hardPDF", evgenConfig.hardPDF))
if _checkattr("softPDF"):
    print ("MetaData: %s = %s" % ("softPDF", evgenConfig.softPDF))
if _checkattr("nEventsPerJob"):
    print ("MetaData: %s = %s" % ("nEventsPerJob", evgenConfig.nEventsPerJob))
if _checkattr("keywords"):
    print ("MetaData: %s = %s" % ("keywords", ", ".join(evgenConfig.keywords).lower() ))
if _checkattr("categories"):
    print ( ", " + ", ".join(evgenConfig.categories))
else:
    print (" ")
 
#if _checkattr("categories"):  # will be uncommented when categories included into metadata
#    print "MetaData: %s = %s" % ("categories", ", ".join(evgenConfig.categories))
if _checkattr("specialConfig"):
    print ("MetaData: %s = %s" % ("specialConfig", evgenConfig.specialConfig))
# TODO: Require that a contact / JO author is always set
if _checkattr("contact"):
    print ("MetaData: %s = %s" % ("contactPhysicist", ", ".join(evgenConfig.contact)))
#if _checkattr( "randomSeed") :    # comment out for the time being
print ("MetaData: %s = %s" % ("randomSeed", str(runArgs.randomSeed)))
 
    
    
 
# Output list of generator filters used
filterNames = [alg.getType() for alg in acas.iter_algseq(filtSeq)]
excludedNames = ['AthSequencer', 'PyAthena::Alg', 'TestHepMC']
filterNames = list(set(filterNames) - set(excludedNames))
print ("MetaData: %s = %s" % ("genFilterNames", ", ".join(filterNames)))
 
 
 
 
from PyJobTransformsCore.runargs import RunArguments
runPars = RunArguments()
runPars.nEventsPerJob = evgenConfig.nEventsPerJob
runPars.maxeventsstrategy = evgenConfig.maxeventsstrategy
with open("config.pickle", "wb") as f:
    import pickle
    pickle.dump(runPars, f)
 
 
 
 
evgenLog.debug("****************** STARTING EVENT GENERATION *****************")
print ("****************** STARTING EVENT GENERATION *****************")
print ("**************************************************************")
print ("****************** PLEASE IGNORE THE LOG FROM PYTHIA ************")
print ("****************** GENERATION OF ONE PYTHIA EVENT ***************")
print ("******************** IS NEEDED TO MAKE *************")
print ("****************** THE TRANSFORM WORK ***************************")
print ("**************************************************************")