upstream/mercurial-mirror Files · mercurial/interfaces/util.py

transaction: allow finalizer to add finalizer...

transaction: allow finalizer to add finalizer It will make some code (persistent nodemap related) simpler to write, because higher level code can blindly queue finalization without thinking too hard about the context. Differential Revision: https://phab.mercurial-scm.org/D7833

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      # 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

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				# 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