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