1 #! /usr/bin/env python

     2 

     3 "Replace tabs with spaces in argument files.  Print names of changed files."

     4 

     5 import os

     6 import sys

     7 import getopt

     8 

     9 def main():

    10     tabsize = 8

    11     try:

    12         opts, args = getopt.getopt(sys.argv[1:], "t:")

    13         if not args:

    14             raise getopt.error, "At least one file argument required"

    15     except getopt.error, msg:

    16         print msg

    17         print "usage:", sys.argv[0], "[-t tabwidth] file ..."

    18         return

    19     for optname, optvalue in opts:

    20         if optname == '-t':

    21             tabsize = int(optvalue)

    22 

    23     for filename in args:

    24         process(filename, tabsize)

    25 

    26 def process(filename, tabsize):

    27     try:

    28         f = open(filename)

    29         text = f.read()

    30         f.close()

    31     except IOError, msg:

    32         print "%r: I/O error: %s" % (filename, msg)

    33         return

    34     newtext = text.expandtabs(tabsize)

    35     if newtext == text:

    36         return

    37     backup = filename + "~"

    38     try:

    39         os.unlink(backup)

    40     except os.error:

    41         pass

    42     try:

    43         os.rename(filename, backup)

    44     except os.error:

    45         pass

    46     f = open(filename, "w")

    47     f.write(newtext)

    48     f.close()

    49     print filename

    50 

    51 if __name__ == '__main__':

    52     main()