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import argparse
import re
import sys
from typing import Optional
from typing import Pattern
from typing import Sequence
from typing import Tuple
from pre_commit import output
from pre_commit.hook import Hook
from pre_commit.languages import helpers
from pre_commit.xargs import xargs
ENVIRONMENT_DIR = None
get_default_version = helpers.basic_get_default_version
healthy = helpers.basic_healthy
install_environment = helpers.no_install
def _process_filename_by_line(pattern: Pattern[bytes], filename: str) -> int:
retv = 0
with open(filename, 'rb') as f:
for line_no, line in enumerate(f, start=1):
if pattern.search(line):
retv = 1
output.write(f'{filename}:{line_no}:')
output.write_line_b(line.rstrip(b'\r\n'))
return retv
def _process_filename_at_once(pattern: Pattern[bytes], filename: str) -> int:
retv = 0
with open(filename, 'rb') as f:
contents = f.read()
match = pattern.search(contents)
if match:
retv = 1
line_no = contents[:match.start()].count(b'\n')
output.write(f'{filename}:{line_no + 1}:')
matched_lines = match[0].split(b'\n')
matched_lines[0] = contents.split(b'\n')[line_no]
output.write_line_b(b'\n'.join(matched_lines))
return retv
def run_hook(
hook: Hook,
file_args: Sequence[str],
color: bool,
) -> Tuple[int, bytes]:
exe = (sys.executable, '-m', __name__) + tuple(hook.args) + (hook.entry,)
return xargs(exe, file_args, color=color)
def main(argv: Optional[Sequence[str]] = None) -> int:
parser = argparse.ArgumentParser(
description=(
'grep-like finder using python regexes. Unlike grep, this tool '
'returns nonzero when it finds a match and zero otherwise. The '
'idea here being that matches are "problems".'
),
)
parser.add_argument('-i', '--ignore-case', action='store_true')
parser.add_argument('--multiline', action='store_true')
parser.add_argument('pattern', help='python regex pattern.')
parser.add_argument('filenames', nargs='*')
args = parser.parse_args(argv)
flags = re.IGNORECASE if args.ignore_case else 0
if args.multiline:
flags |= re.MULTILINE | re.DOTALL
pattern = re.compile(args.pattern.encode(), flags)
retv = 0
for filename in args.filenames:
if args.multiline:
retv |= _process_filename_at_once(pattern, filename)
else:
retv |= _process_filename_by_line(pattern, filename)
return retv
if __name__ == '__main__':
exit(main())
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