#!/usr/bin/python

import sys, getopt

def display_help():
    print '####################################################################'
    print '#                                                                  #'
    print '# File: portable.py                                                #'
    print '# Description:                                                     #'
    print '#   - search and replace within a binary file                      #'
    print '#                                                                  #'
    print '# Parameters:                                                      #'
    print '#   -f, --file    :  target file                                   #'
    print '#   -s, --search  :  term to search for                            #'
    print '#                    default is "C:\Python"                        #'
    print '#   -r, --replace :  replace with this                             #'
    print '#                    default is ".."                               #'
    print '#                                                                  #'
    print '# example:                                                         #'
    print '#  portable.py -f <target_file> -s <search_term> -r <replace_term> #'
    print '#                                                                  #'
    print '####################################################################'
    sys.exit(2)

def main(argv):
    target = ''
    search = 'C:\Python27'
    replace = '..'
    try:
        opts, args = getopt.getopt(argv,"hf:s:r:",["file=","search=", "replace="])
    except getopt.GetoptError:
        display_help()
    for opt, arg in opts:
        if opt == '-h':
            display_help()
        elif opt in ("-f", "--file"):
            target = arg
        elif opt in ("-s", "--search"):
            search = arg
        elif opt in ("-r", "--replace"):
            replace = arg
    if target == '':
        display_help()
    f = open( target, 'rb' ).read()
    f = f.replace( search, replace )
    open( target, 'wb' ).write(f)

if __name__ == "__main__":
    main(sys.argv[1:])
