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#! /usr/bin/env python3
"Replace tabs with spaces in argument files. Print names of changed files."
import os
import sys
import getopt
import tokenize
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 as 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:
with tokenize.open(filename) as f:
text = f.read()
encoding = f.encoding
except IOError as 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 OSError:
pass
try:
os.rename(filename, backup)
except OSError:
pass
with open(filename, "w", encoding=encoding) as f:
f.write(newtext)
if verbose:
print(filename)
if __name__ == '__main__':
main()