import contextlib import functools import os.path import sys import traceback from typing import Generator import pre_commit.constants as C from pre_commit import output from pre_commit.store import Store from pre_commit.util import force_bytes class FatalError(RuntimeError): pass def _log_and_exit(msg: str, exc: BaseException, formatted: str) -> None: error_msg = f'{msg}: {type(exc).__name__}: '.encode() + force_bytes(exc) output.write_line_b(error_msg) storedir = Store().directory log_path = os.path.join(storedir, 'pre-commit.log') with contextlib.ExitStack() as ctx: if os.access(storedir, os.W_OK): output.write_line(f'Check the log at {log_path}') log = ctx.enter_context(open(log_path, 'wb')) else: # pragma: win32 no cover output.write_line(f'Failed to write to log at {log_path}') log = sys.stdout.buffer _log_line = functools.partial(output.write_line, stream=log) _log_line_b = functools.partial(output.write_line_b, stream=log) _log_line('### version information') _log_line() _log_line('```') _log_line(f'pre-commit version: {C.VERSION}') _log_line('sys.version:') for line in sys.version.splitlines(): _log_line(f' {line}') _log_line(f'sys.executable: {sys.executable}') _log_line(f'os.name: {os.name}') _log_line(f'sys.platform: {sys.platform}') _log_line('```') _log_line() _log_line('### error information') _log_line() _log_line('```') _log_line_b(error_msg) _log_line('```') _log_line() _log_line('```') _log_line(formatted) _log_line('```') raise SystemExit(1) @contextlib.contextmanager def error_handler() -> Generator[None, None, None]: try: yield except (Exception, KeyboardInterrupt) as e: if isinstance(e, FatalError): msg = 'An error has occurred' elif isinstance(e, KeyboardInterrupt): msg = 'Interrupted (^C)' else: msg = 'An unexpected error has occurred' _log_and_exit(msg, e, traceback.format_exc())