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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.errors import FatalError

from pre_commit.store import Store

# For testing purposes

class PreCommitSystemExit(SystemExit):

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)

output.write_line('Check the log at ~/.pre-commit/pre-commit.log')

store = Store()

store.require_created()

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

output.write(error_msg, stream=log)

output.write_line(formatted, stream=log)

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',

e,

traceback.format_exc(),

)