File size: 975 Bytes
c5db80e |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 |
from contextlib import contextmanager
from pip._vendor.contextlib2 import ExitStack
from pip._internal.utils.typing import MYPY_CHECK_RUNNING
if MYPY_CHECK_RUNNING:
from typing import Iterator, ContextManager, TypeVar
_T = TypeVar('_T', covariant=True)
class CommandContextMixIn(object):
def __init__(self):
# type: () -> None
super(CommandContextMixIn, self).__init__()
self._in_main_context = False
self._main_context = ExitStack()
@contextmanager
def main_context(self):
# type: () -> Iterator[None]
assert not self._in_main_context
self._in_main_context = True
try:
with self._main_context:
yield
finally:
self._in_main_context = False
def enter_context(self, context_provider):
# type: (ContextManager[_T]) -> _T
assert self._in_main_context
return self._main_context.enter_context(context_provider)
|