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#! /usr/bin/env python

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

import os

import sys

import getopt

def main():

tabsize = 8

try:

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

if not args:

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

except getopt.error, msg:

print msg

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

return

for optname, optvalue in opts:

if optname == '-t':

tabsize = int(optvalue)

for filename in args:

process(filename, tabsize)

def process(filename, tabsize, verbose=True):

try:

f = open(filename)

text = f.read()

f.close()

except IOError, msg:

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

return

newtext = text.expandtabs(tabsize)

if newtext == text:

return

backup = filename + "~"

try:

os.unlink(backup)

except os.error:

pass

try:

os.rename(filename, backup)

except os.error:

pass

with open(filename, "w") as f:

f.write(newtext)

if verbose:

print filename

if __name__ == '__main__':

main()