mps_splice.py

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#!/usr/bin/env python
import re
import argparse
import math
import fileinput

# Set up argrument parser
helpEpilog = ''''''

parser = argparse.ArgumentParser(description='Take card file, blank all INFI directives and insert the INFI directives from the modifier file instead.',
                                 epilog=helpEpilog,
                                 formatter_class=argparse.RawDescriptionHelpFormatter)

parser.add_argument('inCfg', action='store',
                    help='name of the config-template')
parser.add_argument('modCfg', action='store',
                    help='name of the modifier file from mps_split')
parser.add_argument('outCfg', action='store',
                    help='name of modified output file')
parser.add_argument('isn', action='store',
                    help='number of the job (three digit number with leading zeros)')
parser.add_argument("--max-events", dest = "max_events", type = int,
                    help = "maximum number of events to process")
parser.add_argument("--skip-events", dest = "skip_events", type = int,
                    help = "number of events to skip before processing")

# Parse arguments
args = parser.parse_args()
inCfg  = args.inCfg
modCfg = args.modCfg
outCfg = args.outCfg
isn    = args.isn


# open input file
with open(inCfg, 'r') as INFILE:
    body = INFILE.read()

# read modifier file
with open(modCfg, 'r') as MODFILE:
    mods = MODFILE.read()
mods = mods.strip()

# prepare the new fileNames directive. Delete first line if necessary.
fileNames = mods.split('\n')
if 'CastorPool=' in fileNames[0]:
    del fileNames[0]

# replace ISN number (input is a string of three digit number with leading zeros though)
body = re.sub(re.compile('ISN',re.M), isn, body)

# print to outCfg
with open(outCfg, 'w') as OUTFILE:
    OUTFILE.write(body)

# Number of total files and number of extends for cms.vstring are needed
numberOfFiles   = len(fileNames)
numberOfExtends = int(math.ceil(numberOfFiles/255.))

# Create and insert the readFile.extend lines
for j in xrange(numberOfExtends):
    insertBlock = "readFiles.extend([\n    "
    i=0
    currentStart = j*255
    while (i<255) and ((currentStart+i)<numberOfFiles):
        entry = fileNames[currentStart+i].strip()
        if (i==254) or ((currentStart+i+1)==numberOfFiles):
            insertBlock += "\'"+entry+"\'])\n"
        else:
            insertBlock += "\'"+entry+"\',\n    "
        i+=1

    for line in fileinput.input(outCfg, inplace=1):
        print line,
        if re.match('readFiles\s*=\s*cms.untracked.vstring()',line):
            print insertBlock,

if args.skip_events is not None:
    with open(outCfg, "a") as f:
        f.write("process.source.skipEvents = cms.untracked.uint32({0:d})\n"
                .format(args.skip_events))

if args.max_events is not None:
    with open(outCfg, "a") as f:
        f.write("process.maxEvents = cms.untracked.PSet(input = "
                "cms.untracked.int32({0:d}))\n".format(args.max_events))