Mercurial > hg
view mercurial/policy.py @ 31393:8b6927eb7efd
util: don't use mutable default argument value
I don't think this is any tight loops and we'd need to worry about
PyObject creation overhead. Also, I'm pretty sure strptime()
will be much slower than PyObject creation (date parsing is
surprisingly slow).
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Sun, 12 Mar 2017 21:54:32 -0700 |
parents | 8a17c541177f |
children | 56148133ef36 |
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# 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 # cffi - required cffi versions (implemented within pure module) # cffi-allow - allow pure Python implementation if cffi version is missing # py - only load pure Python modules # # By default, require the C extensions for performance reasons. policy = b'c' policynoc = (b'cffi', b'cffi-allow', b'py') policynocffi = (b'c', b'py') 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 = 'cffi' # 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 = b'py' # Environment variable can always force settings. if sys.version_info[0] >= 3: if 'HGMODULEPOLICY' in os.environ: policy = os.environ['HGMODULEPOLICY'].encode('utf-8') else: policy = os.environ.get('HGMODULEPOLICY', policy)