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patch: allow copy information to be passed in...
patch: allow copy information to be passed in When displaying patches from graphical tools where you can browse through individual files, with diff being called separately on each, recomputing the limits of file copy history can become rather expensive on large repositories. Instead, we can compute it once and pass it in for subsequent calls.

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policy.py
40 lines | 1.1 KiB | text/x-python | PythonLexer
# policy.py - module policy logic for Mercurial.
#
# Copyright 2015 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.
from __future__ import absolute_import
import os
import sys
# Rules for how modules can be loaded. Values are:
#
# c - require C extensions
# allow - allow pure Python implementation when C loading fails
# py - only load pure Python modules
#
# By default, require the C extensions for performance reasons.
policy = 'c'
try:
from . import __modulepolicy__
policy = __modulepolicy__.modulepolicy
except ImportError:
pass
# PyPy doesn't load C extensions.
#
# The canonical way to do this is to test platform.python_implementation().
# But we don't import platform and don't bloat for it here.
if '__pypy__' in sys.builtin_module_names:
policy = 'py'
# Our C extensions aren't yet compatible with Python 3. So use pure Python
# on Python 3 for now.
if sys.version_info[0] >= 3:
policy = 'py'
# Environment variable can always force settings.
policy = os.environ.get('HGMODULEPOLICY', policy)