import os
import sys
import argparse


parser = argparse.ArgumentParser(description='Optional app description')

# Switch
parser.add_argument('--overwrite', action='store_true',
                            help='write to transport file')

args = parser.parse_args()

print args.overwrite


foamTranFile = "transport30.foam"

with open("transport.dat") as tranlibFile:
    for line in tranlibFile:
        name = line[:19].strip(" ")
        params = "( {} );".format(line[19:70])
        checkCmd = 'foamDictionary -entry "{}" ' + foamTranFile + ' &> /dev/null'
        dictCmd = 'foamDictionary -entry "{}.transport.tranlib" -set "{}" ' + foamTranFile + ' &> /dev/null'
        if os.system(checkCmd.format(name)) == 0:
            res = os.system(dictCmd.format(name, params))
            if res != 0:
                print "Error! processing ", name
                exit(-1)