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1 """Contains the Violation error class used internally."""
2 from __future__ import annotations
3
4 import functools
5 import linecache
6 import logging
7 from typing import Match
8 from typing import NamedTuple
9
10 from flake8 import defaults
11 from flake8 import utils
12
13
14 LOG = logging.getLogger(__name__)
15
16
17 @functools.lru_cache(maxsize=512)
18 def _find_noqa(physical_line: str) -> Match[str] | None:
19 return defaults.NOQA_INLINE_REGEXP.search(physical_line)
20
21
22 class Violation(NamedTuple):
23 """Class representing a violation reported by Flake8."""
24
25 code: str
26 filename: str
27 line_number: int
28 column_number: int
29 text: str
30 physical_line: str | None
31
32 def is_inline_ignored(self, disable_noqa: bool) -> bool:
33 """Determine if a comment has been added to ignore this line.
34
35 :param disable_noqa:
36 Whether or not users have provided ``--disable-noqa``.
37 :returns:
38 True if error is ignored in-line, False otherwise.
39 """
40 physical_line = self.physical_line
41 # TODO(sigmavirus24): Determine how to handle stdin with linecache
42 if disable_noqa:
43 return False
44
45 if physical_line is None:
46 physical_line = linecache.getline(self.filename, self.line_number)
47 noqa_match = _find_noqa(physical_line)
48 if noqa_match is None:
49 LOG.debug("%r is not inline ignored", self)
50 return False
51
52 codes_str = noqa_match.groupdict()["codes"]
53 if codes_str is None:
54 LOG.debug("%r is ignored by a blanket ``# noqa``", self)
55 return True
56
57 codes = set(utils.parse_comma_separated_list(codes_str))
58 if self.code in codes or self.code.startswith(tuple(codes)):
59 LOG.debug(
60 "%r is ignored specifically inline with ``# noqa: %s``",
61 self,
62 codes_str,
63 )
64 return True
65
66 LOG.debug(
67 "%r is not ignored inline with ``# noqa: %s``", self, codes_str
68 )
69 return False