# HG changeset patch
# User Yuya Nishihara <yuya@tcha.org>
# Date 2017-05-28 06:45:52
# Node ID 2e431fb98c6b539be848d91a4a379023b26aad58
# Parent  50eaccb8353fafbc2b03f9aee4c3520c7a828cbe

policy: extend API version checks for cffi

This is just a stub for future extension. I could add a version constant to
CFFI modules by putting it to both ffi.set_source() and ffi.cdef(), but that
doesn't seem right. So for now, cffi modules will be explicitly unversioned
(i.e. version constant must be undefined or set to None.) We can revisit it
later when we need to consider CFFI support more seriously.

diff --git a/mercurial/policy.py b/mercurial/policy.py
--- a/mercurial/policy.py
+++ b/mercurial/policy.py
@@ -72,16 +72,16 @@ def _importfrom(pkgname, modname):
 
 # keep in sync with "version" in C modules
 _cextversions = {
-    r'base85': 1,
-    r'bdiff': 1,
-    r'diffhelpers': 1,
-    r'mpatch': 1,
-    r'osutil': 1,
-    r'parsers': 1,
+    (r'cext', r'base85'): 1,
+    (r'cext', r'bdiff'): 1,
+    (r'cext', r'diffhelpers'): 1,
+    (r'cext', r'mpatch'): 1,
+    (r'cext', r'osutil'): 1,
+    (r'cext', r'parsers'): 1,
 }
 
 def _checkmod(pkgname, modname, mod):
-    expected = _cextversions.get(modname)
+    expected = _cextversions.get((pkgname, modname))
     actual = getattr(mod, r'version', None)
     if actual != expected:
         raise ImportError(r'cannot import module %s.%s '