opener: introduce an abstact superclass of it
Currently, this class doesn't do anything useful.
--- a/mercurial/scmutil.py Sat Apr 30 19:42:00 2011 +0200
+++ b/mercurial/scmutil.py Sat Apr 30 19:36:48 2011 +0200
@@ -129,7 +129,14 @@
# want to add "foo/bar/baz" before checking if there's a "foo/.hg"
self.auditeddir.update(prefixes)
-class opener(object):
+class abstractopener(object):
+ """Abstract base class; cannot be instantiated"""
+
+ def __init__(self, *args, **kwargs):
+ '''Prevent instantiation; don't call this from subclasses.'''
+ raise NotImplementedError('attempted instantiating ' + str(type(self)))
+
+class opener(abstractopener):
'''Open files relative to a base directory
This class is used to hide the details of COW semantics and