import argparse | |
from typing import Optional | |
from typing import Sequence | |
def main(argv: Optional[Sequence[str]] = None) -> int: | |
parser = argparse.ArgumentParser() | |
parser.add_argument('filenames', nargs='*', help='Filenames to check') | |
args = parser.parse_args(argv) | |
retv = 0 | |
for filename in args.filenames: | |
with open(filename, 'rb') as f: | |
if f.read(3) == b'\xef\xbb\xbf': | |
retv = 1 | |
print(f'{filename}: Has a byte-order marker') | |
return retv | |
if __name__ == '__main__': | |
raise SystemExit(main()) |