mirror of https://github.com/pypa/pip
30 lines
796 B
Python
30 lines
796 B
Python
# The following comment should be removed at some point in the future.
|
|
# mypy: disallow-untyped-defs=False
|
|
|
|
from contextlib import contextmanager
|
|
|
|
from pip._vendor.contextlib2 import ExitStack
|
|
|
|
|
|
class CommandContextMixIn(object):
|
|
def __init__(self):
|
|
super(CommandContextMixIn, self).__init__()
|
|
self._in_main_context = False
|
|
self._main_context = ExitStack()
|
|
|
|
@contextmanager
|
|
def main_context(self):
|
|
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):
|
|
assert self._in_main_context
|
|
|
|
return self._main_context.enter_context(context_provider)
|