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