Mercurial > hg
view mercurial/policy.py @ 32405:bdc4861ffe59
fsmonitor: fix silly "*kwargs" bug in merge.update() override
Everyone knows that it's supposed to be spelled with two asterisks.
It started failing in fad5e299cfc7 (update: accept --merge to allow
merging across topo branches (issue5125), 2017-02-13) because until
then there was only one argument that was covered by the kwargs, so
*kwargs or **kwargs both worked (or at least that's what I think with
my limited understanding of Python).
author | Martin von Zweigbergk <martinvonz@google.com> |
---|---|
date | Mon, 22 May 2017 10:41:32 -0700 |
parents | 8e0327dae3f4 |
children | 28b773aa3ff2 |
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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, fall back to the pure modules so the in-place build can # run without recompiling the C extensions. This will be overridden by # __modulepolicy__ generated by setup.py. policy = b'allow' policynoc = (b'cffi', b'cffi-allow', b'py') policynocffi = (b'c', b'py') _packageprefs = { # policy: (versioned package, pure package) b'c': (r'cext', None), b'allow': (r'cext', r'pure'), b'cffi': (None, r'pure'), # TODO: (r'cffi', None) b'cffi-allow': (None, r'pure'), # TODO: (r'cffi', r'pure') b'py': (None, r'pure'), } 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 r'__pypy__' in sys.builtin_module_names: policy = b'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 r'HGMODULEPOLICY' in os.environ: policy = os.environ[r'HGMODULEPOLICY'].encode(r'utf-8') else: policy = os.environ.get(r'HGMODULEPOLICY', policy) def _importfrom(pkgname, modname): # from .<pkgname> import <modname> (where . is looked through this module) fakelocals = {} pkg = __import__(pkgname, globals(), fakelocals, [modname], level=1) try: fakelocals[modname] = mod = getattr(pkg, modname) except AttributeError: raise ImportError(r'cannot import name %s' % modname) # force import; fakelocals[modname] may be replaced with the real module getattr(mod, r'__doc__', None) return fakelocals[modname] def _checkmod(pkgname, modname, mod): expected = 1 # TODO: maybe defined in table? actual = getattr(mod, r'version', None) if actual != expected: raise ImportError(r'cannot import module %s.%s ' r'(expected version: %d, actual: %r)' % (pkgname, modname, expected, actual)) def importmod(modname): """Import module according to policy and check API version""" try: verpkg, purepkg = _packageprefs[policy] except KeyError: raise ImportError(r'invalid HGMODULEPOLICY %r' % policy) assert verpkg or purepkg if verpkg: try: mod = _importfrom(verpkg, modname) _checkmod(verpkg, modname, mod) return mod except ImportError: if not purepkg: raise return _importfrom(purepkg, modname)