mirror of
https://github.com/Lucas-V-L/lucasvl.nl.git
synced 2024-10-29 19:38:16 -05:00
28 lines
774 B
Python
28 lines
774 B
Python
|
from contextlib import ExitStack, contextmanager
|
||
|
from typing import ContextManager, Generator, TypeVar
|
||
|
|
||
|
_T = TypeVar("_T", covariant=True)
|
||
|
|
||
|
|
||
|
class CommandContextMixIn:
|
||
|
def __init__(self) -> None:
|
||
|
super().__init__()
|
||
|
self._in_main_context = False
|
||
|
self._main_context = ExitStack()
|
||
|
|
||
|
@contextmanager
|
||
|
def main_context(self) -> Generator[None, None, 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: ContextManager[_T]) -> _T:
|
||
|
assert self._in_main_context
|
||
|
|
||
|
return self._main_context.enter_context(context_provider)
|