upstream/mercurial-mirror Files · mercurial/utils/interfaceutil.py

exchangev2: fetch and apply phases data...

exchangev2: fetch and apply phases data Now that the server supports emitting phases data, we can request it and apply it on the client. Because we may receive phases-only updates from the server, we no longer conditionally perform the "changesetdata" command depending on whether there are revisions to fetch. In the previous wire protocol, this case would result in us falling back to performing "listkeys" commands to look up phases, bookmarks, etc data. But since "changesetdata" is smart enough to handle metadata only fetches, we can keep things consistent. It's worth noting that because of the unified approach to changeset data retrieval, phase handling code in wire proto v2 exchange is drastically simpler. Contrast with all the code in exchange.py dealing with all the variations for obtaining phases data. Differential Revision: https://phab.mercurial-scm.org/D4484

Gregory Szorc - - Load All Authors

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      # interfaceutil.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('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__=''):

                  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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				# interfaceutil.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('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__=''):
				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