Clean whitespace from source files. Remove trailing whitespace at the end of files and converts tabs to spaces.

cleanup_whitespace.py

#!/usr/bin/env python

#########################################################################
# Script to clean up whitespace in source files.
# - Removes trailing whitespace at the end of lines
# - Converts tabs to spaces (4 spaces = 1 tab)
#
# Copyright 2013 Stephen Doyle
#########################################################################

import sys
import shutil

def cleanup(f):
    # make a backup
    shutil.copyfile(f, f+".bak")

    lines = file(f, 'r').readlines()
    outf = file(f, 'w')

    for line in lines:
        line = line.rstrip().replace("\t", "    ") 
        print >>outf, line

if __name__ == "__main__":
    files = sys.argv[1:]

    for f in files:
        cleanup(f)