#!/usr/bin/python

# cfgcl.py: cleans commented and blank lines out of config files
# Copyright(c) Darren Kirby 2004. Released under the Artistic Licence:
# http://www.opensource.org/licenses/artistic-license.php

import sys
from getopt import getopt, GetoptError
import os.path
import re

def showUsage():
    print '''Usage: cfgcl [-h] [-tN] file [outfile]
    Options:    
       '-h'  Print this drivel
       '-tN' Token. 'N' is a code for the comment delimiter. Current tokens are:
             '1' for ';' ie: php.ini
             '2' for '"' ie: vimrc
             The default is the hashmark: '#'
    '''  

def readInfile(infile):
    f = open(infile, "r")
    text = f.readlines()
    f.close()
    return text

def writeOutfile(outfile, text, token):
    c = re.compile('^[\s]*' + token + '[a-zA-Z0-9_]*')
    b = re.compile('^$')
    if os.path.exists(outfile) == 1:
        os.unlink(outfile)
    f = open(outfile, "a")
    for line in text:
        if not c.match(line):
            if not b.match(line):
                f.write(line)
    sys.exit(0)

def main():
    try:
        opts, args = getopt(sys.argv[1:], "ht:") 
    except GetoptError:
        print("Invalid option(s)")
        showUsage()
        sys.exit(22)
    if os.path.exists(args[0]) == 0:
        print "%s: File not found" % args[0]
        sys.exit(2)
    token = '#'
    for opt, arg in opts:
        if opt in ("-h"):
            showUsage()
            sys.exit(0)
        if opt in ("-t"):
            if arg == "1":
                token = ';'
            elif arg == "2":
                token = '"'
    text = readInfile(args[0])
    if len(args) == 2:
        outfile = args[1]
    else:
        outfile = (os.path.basename(args[0]) + ".clean")     
    writeOutfile(outfile, text, token)
 
if __name__ == '__main__':
    main()