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Filename :
pygrep.py
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from __future__ import annotations import argparse import re import sys from typing import NamedTuple from typing import Pattern from typing import Sequence from pre_commit import lang_base from pre_commit import output from pre_commit.prefix import Prefix from pre_commit.xargs import xargs ENVIRONMENT_DIR = None get_default_version = lang_base.basic_get_default_version health_check = lang_base.basic_health_check install_environment = lang_base.no_install in_env = lang_base.no_env 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 _process_filename_by_line_negated( pattern: Pattern[bytes], filename: str, ) -> int: with open(filename, 'rb') as f: for line in f: if pattern.search(line): return 0 else: output.write_line(filename) return 1 def _process_filename_at_once_negated( pattern: Pattern[bytes], filename: str, ) -> int: with open(filename, 'rb') as f: contents = f.read() match = pattern.search(contents) if match: return 0 else: output.write_line(filename) return 1 class Choice(NamedTuple): multiline: bool negate: bool FNS = { Choice(multiline=True, negate=True): _process_filename_at_once_negated, Choice(multiline=True, negate=False): _process_filename_at_once, Choice(multiline=False, negate=True): _process_filename_by_line_negated, Choice(multiline=False, negate=False): _process_filename_by_line, } def run_hook( prefix: Prefix, entry: str, args: Sequence[str], file_args: Sequence[str], *, is_local: bool, require_serial: bool, color: bool, ) -> tuple[int, bytes]: cmd = (sys.executable, '-m', __name__, *args, entry) return xargs(cmd, file_args, color=color) def main(argv: Sequence[str] | None = 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('--negate', 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 process_fn = FNS[Choice(multiline=args.multiline, negate=args.negate)] for filename in args.filenames: retv |= process_fn(pattern, filename) return retv if __name__ == '__main__': raise SystemExit(main())