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from __future__ import absolute_import

from __future__ import print_function

from __future__ import unicode_literals

import contextlib

import os.path

import traceback

import six

from pre_commit import five

from pre_commit import output

from pre_commit.store import Store

class FatalError(RuntimeError):

pass

def _to_bytes(exc):

try:

return bytes(exc)

except Exception:

return six.text_type(exc).encode('UTF-8')

def _log_and_exit(msg, exc, formatted):

error_msg = b''.join((

five.to_bytes(msg), b': ',

five.to_bytes(type(exc).__name__), b': ',

_to_bytes(exc), b'\n',

))

output.write(error_msg)

store = Store()

log_path = os.path.join(store.directory, 'pre-commit.log')

output.write_line('Check the log at {}'.format(log_path))

with open(log_path, 'wb') as log:

output.write(error_msg, stream=log)

output.write_line(formatted, stream=log)

raise SystemExit(1)

@contextlib.contextmanager

def error_handler():

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())

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