mercurial/interfaces/util.py
author Gregory Szorc <gregory.szorc@gmail.com>
Thu, 26 Aug 2021 17:39:11 -0700
branchstable
changeset 47867 1e6cb23ce6da
parent 43077 687b865b95ad
child 48966 6000f5b25c9b
permissions -rw-r--r--
packaging: reference proper output directory 9438e9b7321a changed the name of the PyOxidizer target, which changed the name of the output directory. The code changed by this patch wasn't properly updated by that changeset. This resulted in a run-time failure due to trying to read from a non-existent directory. This change should fix the building of Python 3 Inno installers. Differential Revision: https://phab.mercurial-scm.org/D11356

# util.py - Utilities for declaring interfaces.
#
# Copyright 2018 Gregory Szorc <gregory.szorc@gmail.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

# zope.interface imposes a run-time cost due to module import overhead and
# bookkeeping for declaring interfaces. So, we use stubs for various
# zope.interface primitives unless instructed otherwise.

from __future__ import absolute_import

from .. import encoding

if encoding.environ.get(b'HGREALINTERFACES'):
    from ..thirdparty.zope import interface as zi

    Attribute = zi.Attribute
    Interface = zi.Interface
    implementer = zi.implementer
else:

    class Attribute(object):
        def __init__(self, __name__, __doc__=b''):
            pass

    class Interface(object):
        def __init__(
            self, name, bases=(), attrs=None, __doc__=None, __module__=None
        ):
            pass

    def implementer(*ifaces):
        def wrapper(cls):
            return cls

        return wrapper