Mercurial > hg
view mercurial/policy.py @ 31792:55c0c91f55e6
util: document bundle compression
An upcoming patch will add support for documenting bundle
specifications in more detail. As part of this, we'd like to
enumerate available bundle compression formats. In order to do
this, we need to provide the help mechanism a dict of names
and objects with docstrings.
This patch adds docstrings to compengine.bundletype and adds
a function for retrieving a dict of them. The code is not yet
used.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Sat, 01 Apr 2017 13:29:01 -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)