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82082bfaf8
Summary: We only support the "C" policy, therefore let's inline it and simplify the code significantly. Reviewed By: quark-zju Differential Revision: D18819680 fbshipit-source-id: 0bc0a12b85ddc42af007d3a20c0f4e8497bedb21
62 lines
1.7 KiB
Python
62 lines
1.7 KiB
Python
# Portions Copyright (c) Facebook, Inc. and its affiliates.
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2.
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# policy.py - module policy logic for Mercurial.
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#
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# Copyright 2015 Gregory Szorc <gregory.szorc@gmail.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import absolute_import
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import os
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import sys
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def _importfrom(modname):
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# from .edenscmnative import <modname> (where . is looked through this module)
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fakelocals = {}
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pkg = __import__("edenscmnative", globals(), fakelocals, [modname], level=0)
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try:
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fakelocals[modname] = mod = getattr(pkg, modname)
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except AttributeError:
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raise ImportError(r"cannot import name %s" % modname)
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# force import; fakelocals[modname] may be replaced with the real module
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getattr(mod, r"__doc__", None)
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return fakelocals[modname]
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# keep in sync with "version" in C modules
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_cextversions = {
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r"base85": 1,
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r"bdiff": 1,
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r"diffhelpers": 1,
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r"mpatch": 1,
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r"osutil": 2,
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r"parsers": 5,
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}
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# map import request to other package or module
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_modredirects = {r"charencode": r"parsers"}
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def _checkmod(modname, mod):
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expected = _cextversions.get(modname)
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actual = getattr(mod, r"version", None)
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if actual != expected:
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raise ImportError(
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r"cannot import module %s.%s "
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r"(expected version: %d, actual: %r)" % (modname, expected, actual)
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)
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def importmod(modname):
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"""Import module"""
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mn = _modredirects.get(modname, modname)
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mod = _importfrom(mn)
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_checkmod(mn, mod)
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return mod
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