73 lines
2.0 KiB
Python
73 lines
2.0 KiB
Python
from __future__ import annotations
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import argparse
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from collections.abc import Iterable
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from collections.abc import Iterator
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from collections.abc import Sequence
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from pre_commit_hooks.util import added_files
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from pre_commit_hooks.util import cmd_output
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def lower_set(iterable: Iterable[str]) -> set[str]:
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return {x.lower() for x in iterable}
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def parents(file: str) -> Iterator[str]:
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path_parts = file.split('/')
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path_parts.pop()
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while path_parts:
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yield '/'.join(path_parts)
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path_parts.pop()
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def directories_for(files: set[str]) -> set[str]:
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return {parent for file in files for parent in parents(file)}
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def find_conflicting_filenames(filenames: Sequence[str]) -> int:
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repo_files = set(cmd_output('git', 'ls-files').splitlines())
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repo_files |= directories_for(repo_files)
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relevant_files = set(filenames) | added_files()
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relevant_files |= directories_for(relevant_files)
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repo_files -= relevant_files
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retv = 0
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# new file conflicts with existing file
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conflicts = lower_set(repo_files) & lower_set(relevant_files)
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# new file conflicts with other new file
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lowercase_relevant_files = lower_set(relevant_files)
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for filename in set(relevant_files):
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if filename.lower() in lowercase_relevant_files:
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lowercase_relevant_files.remove(filename.lower())
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else:
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conflicts.add(filename.lower())
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if conflicts:
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conflicting_files = [
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x for x in repo_files | relevant_files
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if x.lower() in conflicts
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]
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for filename in sorted(conflicting_files):
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print(f'Case-insensitivity conflict found: {filename}')
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retv = 1
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return retv
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def main(argv: Sequence[str] | None = None) -> int:
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parser = argparse.ArgumentParser()
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parser.add_argument(
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'filenames', nargs='*',
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help='Filenames pre-commit believes are changed.',
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)
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args = parser.parse_args(argv)
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return find_conflicting_filenames(args.filenames)
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if __name__ == '__main__':
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raise SystemExit(main())
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