# HG changeset patch
# User Durham Goode <durham@fb.com>
# Date 1478772799 28800
# Node ID 7c7d845f8b64d7a6c280574ebbe281b8a9e2cc48
# Parent  fccc3eea2ddb0f154d8c84509633d1336355171c
manifest: make manifestlog use it's own cache

As we start to make manifestlog the primary manifest source, the dependency on
manifest.manifest will cause circular dependency problems. Let's break this
dependency by making manifestlog use it's own cache. In a near future patch we
will remove the previous manifest cache so we're not duplicating it.

diff -r fccc3eea2ddb -r 7c7d845f8b64 mercurial/manifest.py
--- a/mercurial/manifest.py	Thu Nov 10 02:13:19 2016 -0800
+++ b/mercurial/manifest.py	Thu Nov 10 02:13:19 2016 -0800
@@ -1255,10 +1255,12 @@
         self._repo = repo
 
         usetreemanifest = False
+        cachesize = 4
 
         opts = getattr(opener, 'options', None)
         if opts is not None:
             usetreemanifest = opts.get('treemanifest', usetreemanifest)
+            cachesize = opts.get('manifestcachesize', cachesize)
         self._treeinmem = usetreemanifest
 
         self._oldmanifest = repo._constructmanifest()
@@ -1266,15 +1268,9 @@
 
         # A cache of the manifestctx or treemanifestctx for each directory
         self._dirmancache = {}
+        self._dirmancache[''] = util.lrucachedict(cachesize)
 
-        # We'll separate this into it's own cache once oldmanifest is no longer
-        # used
-        self._mancache = self._oldmanifest._mancache
-        self._dirmancache[''] = self._mancache
-
-        # A future patch makes this use the same config value as the existing
-        # mancache
-        self.cachesize = 4
+        self.cachesize = cachesize
 
     def __getitem__(self, node):
         """Retrieves the manifest instance for the given node. Throws a