[PATCH] store: eliminate reference cycle in fncachestore

[Simon Heimberg]

# HG changeset patch
# User Simon Heimberg <simohe at besonet.ch>
# Date 1247573107 -7200
# Node ID 0a8f2362bab49d934482a33410119a7a32e19c15
# Parent  01450cb02c41b0276ed4f273a8a15555f763da95
store: eliminate reference cycle in fncachestore

no reference to self in fncacheopener
Inspired by Adrian Buehlmann

diff -r 01450cb02c41 -r 0a8f2362bab4 mercurial/store.py
--- a/mercurial/store.py	Die Jul 14 14:05:01 2009 +0200
+++ b/mercurial/store.py	Die Jul 14 14:05:07 2009 +0200
@@ -284,16 +284,17 @@
         self.pathjoiner = pathjoiner
         self.path = self.pathjoiner(path, 'store')
         self.createmode = _calcmode(self.path)
-        self._op = opener(self.path)
-        self._op.createmode = self.createmode
-        self.fncache = fncache(self._op)
+        op = opener(self.path)
+        op.createmode = self.createmode
+        fn_cache = fncache(op)
+        self.fncache = fn_cache
 
         def fncacheopener(path, mode='r', *args, **kw):
             if (mode not in ('r', 'rb')
                 and path.startswith('data/')
-                and path not in self.fncache):
-                    self.fncache.add(path)
-            return self._op(hybridencode(path), mode, *args, **kw)
+                and path not in fn_cache):
+                    fn_cache.add(path)
+            return op(hybridencode(path), mode, *args, **kw)
         self.opener = fncacheopener
 
     def join(self, f):