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from __future__ import annotations

import argparse

import re

from collections.abc import Iterable

from collections.abc import Sequence

from cfgv import apply_defaults

import pre_commit.constants as C

from pre_commit import git

from pre_commit.clientlib import load_config

from pre_commit.clientlib import MANIFEST_HOOK_DICT

from pre_commit.commands.run import Classifier

def exclude_matches_any(

filenames: Iterable[str],

include: str,

exclude: str,

) -> bool:

if exclude == '^$':

return True

include_re, exclude_re = re.compile(include), re.compile(exclude)

for filename in filenames:

if include_re.search(filename) and exclude_re.search(filename):

return True

return False

def check_useless_excludes(config_file: str) -> int:

config = load_config(config_file)

filenames = git.get_all_files()

classifier = Classifier.from_config(

filenames, config['files'], config['exclude'],

)

retv = 0

exclude = config['exclude']

if not exclude_matches_any(filenames, '', exclude):

print(

f'The global exclude pattern {exclude!r} does not match any files',

)

retv = 1

for repo in config['repos']:

for hook in repo['hooks']:

# the default of manifest hooks is `types: [file]` but we may

# be configuring a symlink hook while there's a broken symlink

hook.setdefault('types', [])

# Not actually a manifest dict, but this more accurately reflects

# the defaults applied during runtime

hook = apply_defaults(hook, MANIFEST_HOOK_DICT)

names = classifier.by_types(

classifier.filenames,

hook['types'],

hook['types_or'],

hook['exclude_types'],

)

include, exclude = hook['files'], hook['exclude']

if not exclude_matches_any(names, include, exclude):

print(

f'The exclude pattern {exclude!r} for {hook["id"]} does '

f'not match any files',

)

retv = 1

return retv

def main(argv: Sequence[str] | None = None) -> int:

parser = argparse.ArgumentParser()

parser.add_argument('filenames', nargs='*', default=[C.CONFIG_FILE])

args = parser.parse_args(argv)

retv = 0

for filename in args.filenames:

retv |= check_useless_excludes(filename)

return retv

if __name__ == '__main__':

raise SystemExit(main())

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