cpython/Tools/scripts/untabify.py

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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 ..."
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return
for optname, optvalue in opts:
if optname == '-t':
tabsize = int(optvalue)
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for file in args:
process(file, tabsize)
def process(file, tabsize):
try:
f = open(file)
text = f.read()
f.close()
except IOError, msg:
print "%s: I/O error: %s" % (`file`, str(msg))
return
newtext = text.expandtabs(tabsize)
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if newtext == text:
return
backup = file + "~"
try:
os.unlink(backup)
except os.error:
pass
try:
os.rename(file, backup)
except os.error:
pass
f = open(file, "w")
f.write(newtext)
f.close()
print file
if __name__ == '__main__':
main()