setup: show how to set the module policy for imports
This is not technically needed, since mercurial.__version__
does not exist as a native module, but, without this style wrappings,
if something else had a native flavor, the module loader would get
upset.
In principle, the `env` object is trying to set HGMODULEPOLICY for
children, so, conceptually we should set it for this in-process
child.
--- a/setup.py Wed Mar 09 15:47:01 2016 +0000
+++ b/setup.py Tue Jan 12 04:45:29 2016 +0000
@@ -212,10 +212,17 @@
f.write('version = "%s"\n' % version)
try:
+ oldpolicy = os.environ.get('HGMODULEPOLICY', None)
+ os.environ['HGMODULEPOLICY'] = 'py'
from mercurial import __version__
version = __version__.version
except ImportError:
version = 'unknown'
+finally:
+ if oldpolicy is None:
+ del os.environ['HGMODULEPOLICY']
+ else:
+ os.environ['HGMODULEPOLICY'] = oldpolicy
class hgbuild(build):
# Insert hgbuildmo first so that files in mercurial/locale/ are found