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#! /usr/bin/env python3
import os
import re
import datetime
FSF = 'by the Free Software Foundation, Inc.'
this_year = datetime.date.today().year
pyre = re.compile(r'^# Copyright (C) (?P<start>\d{4}-)?(?P<end>\d{4})')
def do_file(path):
with open(path) as in_file, open(path + '.out', 'w') as out_file:
for line in in_file:
mo = pyre.match(line)
if mo is None:
out_file.write(line)
continue
start = (mo.group('end')
if mo.group('start') is None
else mo.group('start'))
print('# Copyright (C) {}-{} {}'.format(
mo.group('end'), this_year, FSF), file=out_file)
for line in in_file:
out_file.write(line)
os.rename(path + '.out', path)
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