88 lines
2.6 KiB
Python
88 lines
2.6 KiB
Python
from __future__ import annotations
|
|
|
|
import argparse
|
|
import collections
|
|
from typing import Sequence
|
|
|
|
|
|
CRLF = b'\r\n'
|
|
LF = b'\n'
|
|
CR = b'\r'
|
|
# Prefer LF to CRLF to CR, but detect CRLF before LF
|
|
ALL_ENDINGS = (CR, CRLF, LF)
|
|
FIX_TO_LINE_ENDING = {'cr': CR, 'crlf': CRLF, 'lf': LF}
|
|
|
|
|
|
def _fix(filename: str, contents: bytes, ending: bytes) -> None:
|
|
new_contents = b''.join(
|
|
line.rstrip(b'\r\n') + ending for line in contents.splitlines(True)
|
|
)
|
|
with open(filename, 'wb') as f:
|
|
f.write(new_contents)
|
|
|
|
|
|
def fix_filename(filename: str, fix: str) -> int:
|
|
with open(filename, 'rb') as f:
|
|
contents = f.read()
|
|
|
|
counts: dict[bytes, int] = collections.defaultdict(int)
|
|
|
|
for line in contents.splitlines(True):
|
|
for ending in ALL_ENDINGS:
|
|
if line.endswith(ending):
|
|
counts[ending] += 1
|
|
break
|
|
|
|
# Some amount of mixed line endings
|
|
mixed = sum(bool(x) for x in counts.values()) > 1
|
|
|
|
if fix == 'no' or (fix == 'auto' and not mixed):
|
|
return mixed
|
|
|
|
if fix == 'auto':
|
|
max_ending = LF
|
|
max_lines = 0
|
|
# ordering is important here such that lf > crlf > cr
|
|
for ending_type in ALL_ENDINGS:
|
|
# also important, using >= to find a max that prefers the last
|
|
if counts[ending_type] >= max_lines:
|
|
max_ending = ending_type
|
|
max_lines = counts[ending_type]
|
|
|
|
_fix(filename, contents, max_ending)
|
|
return 1
|
|
else:
|
|
target_ending = FIX_TO_LINE_ENDING[fix]
|
|
# find if there are lines with *other* endings
|
|
# It's possible there's no line endings of the target type
|
|
counts.pop(target_ending, None)
|
|
other_endings = bool(sum(counts.values()))
|
|
if other_endings:
|
|
_fix(filename, contents, target_ending)
|
|
return other_endings
|
|
|
|
|
|
def main(argv: Sequence[str] | None = None) -> int:
|
|
parser = argparse.ArgumentParser()
|
|
parser.add_argument(
|
|
'-f', '--fix',
|
|
choices=('auto', 'no') + tuple(FIX_TO_LINE_ENDING),
|
|
default='auto',
|
|
help='Replace line ending with the specified. Default is "auto"',
|
|
)
|
|
parser.add_argument('filenames', nargs='*', help='Filenames to fix')
|
|
args = parser.parse_args(argv)
|
|
|
|
retv = 0
|
|
for filename in args.filenames:
|
|
if fix_filename(filename, args.fix):
|
|
if args.fix == 'no':
|
|
print(f'{filename}: mixed line endings')
|
|
else:
|
|
print(f'{filename}: fixed mixed line endings')
|
|
retv = 1
|
|
return retv
|
|
|
|
|
|
if __name__ == '__main__':
|
|
raise SystemExit(main())
|