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from __future__ import absolute_import

from __future__ import print_function

from __future__ import unicode_literals

import contextlib

import io

import os.path

import traceback

from pre_commit import five

from pre_commit.errors import FatalError

from pre_commit.output import sys_stdout_write_wrapper

from pre_commit.store import Store

# For testing purposes

class PreCommitSystemExit(SystemExit):

pass

def _to_bytes(exc):

try:

return bytes(exc)

except Exception:

return five.text(exc).encode('UTF-8')

def _log_and_exit(msg, exc, formatted, write_fn=sys_stdout_write_wrapper):

error_msg = b''.join((

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

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

_to_bytes(exc), b'\n',

))

write_fn(error_msg)

write_fn('Check the log at ~/.pre-commit/pre-commit.log\n')

store = Store()

store.require_created()

with io.open(os.path.join(store.directory, 'pre-commit.log'), 'wb') as log:

log.write(five.to_bytes(error_msg))

log.write(five.to_bytes(formatted) + b'\n')

raise PreCommitSystemExit(1)

@contextlib.contextmanager

def error_handler():

try:

yield

except FatalError as e:

_log_and_exit('An error has occurred', e, traceback.format_exc())

except Exception as e:

_log_and_exit(

'An unexpected error has occurred',

traceback.format_exc(),

)

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