##// END OF EJS Templates
linelog: add a Python implementation of the linelog datastructure...
linelog: add a Python implementation of the linelog datastructure This datastructure was originally developed by Jun Wu at Facebook, inspired by SCCS weaves. It's useful as a cache for blame information, but also is the magic that makes `hg absorb` easy to implement. In service of importing the code to Mercurial, I wanted to actually /understand/ it, and once I did I decided to take a run at implementing it. The help/internals/linelog.txt document is the README from Jun Wu's implementaiton. It all applies to our linelog implementation. Differential Revision: https://phab.mercurial-scm.org/D3990

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interfaceutil.py
40 lines | 1.1 KiB | text/x-python | PythonLexer
# 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