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

revlog: introduce an explicit tracking of what the revlog is about...

revlog: introduce an explicit tracking of what the revlog is about Since the dawn of time, people have been forced to rely to lossy introspection of the index filename to determine what the purpose and role of the revlog they encounter is. This is hacky, error prone, inflexible, abstraction-leaky, <insert-your-own-complaints-here>. In Raphaël introduced a new attribute to track this information: `revlog_kind`. However it is initialized in an odd place and various instances end up not having it set. In addition is only tracking some of the information we end up having to introspect in various pieces of code. So we add a new attribute that holds more data and is more strictly enforced. This work is done in collaboration with Raphaël. The `revlog_kind` one will be removed/adapted in the next changeset. We expect to be able to clean up various existing piece of code and to simplify coming work around the newer revlog format. Differential Revision: https://phab.mercurial-scm.org/D10352

Augie Fackler - - Load All Authors

File last commit:

r43347:687b865b default


                r47838:4c041c71

default

Download file

             util.py
        
                    38 lines
            
             | 1.0 KiB
            
                | text/x-python
            
             |
                PythonLexer
            
             / mercurial / interfaces / util.py
          
                    History
                
                 |
                  Annotation
                 | Raw
                 |Copy content
                 |Copy permalink

      # 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

	Site-wide shortcuts
/	Use quick search box
g h	Goto home page
g g	Goto my private gists page
g G	Goto my public gists page
g 0-9	Goto bookmarked items from 0-9
n r	New repository page
n g	New gist page

	Repositories
g s	Goto summary page
g c	Goto changelog page
g f	Goto files page
g F	Goto files page with file search activated
g p	Goto pull requests page
g o	Goto repository settings
g O	Goto repository access permissions settings
t s	Toggle sidebar on some pages

				# 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