xh-system-convert.py

# -*- coding: utf-8 -*-

'''
usage: python xh-system-convert.py FILE
Converts X or H system to Esperanto alphabet characters in FILE

Written by @grooveplex, released into the public domain under the terms of the
CC0 license.
'''

import sys
import re

if len(sys.argv) == 1:
    print('Not enough arguments were given.\nHint: give a filename as the second argument')
    exit(1)
else:
   try:
       open(sys.argv[1])
   except IOError:
        print(('\'{0}\' does not exist.').format(sys.argv[1]))
        exit(1)

    if sys.argv[0] == sys.argv[1]:
        _sure = raw_input('Are you sure you want to overwrite the script itself? [y/n] ')
        if _sure.lower() != 'y':
            exit(0)
        else:
            pass

   with open(sys.argv[1], 'r+') as file:
      text = file.read()
      text = re.sub('ch', 'ĉ', text)
      text = re.sub('gh', 'ĝ', text)
      text = re.sub('hh', 'ĥ', text)
      text = re.sub('jh', 'ĵ', text)
      text = re.sub('sh', 'ŝ', text)
      text = re.sub('uh', 'ŭ', text)

      text = re.sub('cx', 'ĉ', text)
      text = re.sub('gx', 'ĝ', text)
      text = re.sub('hx', 'ĥ', text)
      text = re.sub('jx', 'ĵ', text)
      text = re.sub('sx', 'ŝ', text)
      text = re.sub('ux', 'ŭ', text)

      file.seek(0)
      file.write(text)
      file.truncate()
      file.close()