filectx: allow custom comparators
We're going to introduce other sorts of filectxes very soon, and we'd like the
cmp method to function properly (i.e. commutatively) for them. The only way to
make that happen is for this cmp method to call into that specialized one if
that defines a custom comparator.
--- a/mercurial/context.py Fri Nov 13 23:01:36 2015 -0800
+++ b/mercurial/context.py Fri Nov 13 22:37:51 2015 -0800
@@ -747,11 +747,15 @@
def islink(self):
return 'l' in self.flags()
+ _customcmp = False
def cmp(self, fctx):
"""compare with other file context
returns True if different than fctx.
"""
+ if fctx._customcmp:
+ return fctx.cmp(self)
+
if (fctx._filerev is None
and (self._repo._encodefilterpats
# if file data starts with '\1\n', empty metadata block is