#!/usr/bin/python

import re

import sys, getopt

from shutil import move

from os import remove, close

from tempfile import mkstemp

def replace(file_path, pattern, subst):

    #Create temp file

    fh, abs_path = mkstemp()

    new_file = open(abs_path,'w')

    old_file = open(file_path)

    for line in old_file:

        new_file.write(line.replace(pattern, subst))

    #close temp file

    new_file.close()

    close(fh)

    old_file.close()

    #Remove original file

    remove(file_path)

    #Move new file

    move(abs_path, file_path)

def main(argv):

    in_installed_apps=None 

    uncomment=None 

    done=None 

    file = ''

    instructions='settings_south_syncdb.py -i <settings.py file> to comment south in installed apps, settings_south_syncdb.py -r -i <settings.py file> to decomment south in installed apps'

    try:

       opts, args = getopt.getopt(argv,"hri:",["file="])

    except getopt.GetoptError:

       print 'settings_south_syncdb.py -i <settings.py file>'

       sys.exit(2)

    if not opts:

        print instructions

        sys.exit()

    for opt, arg in opts:

       if opt == '-h':

        print instructions

        sys.exit()

       elif opt == '-r':

         uncomment=True

       elif opt in ("-i", "--file"):

         file = arg

       else:

         print instructions

         sys.exit()

    if uncomment:

        replace(file, '#\'south\',', '\'south\',')

    else:

        replace(file, '\'south\',', '#\'south\',')

if __name__ == "__main__":

   main(sys.argv[1:])