localrepo: push manifestlog and changelog construction code into store

This feels substantially more appropriate, as the store is actually
the layer with knowledge of how to handle this storage. I didn't move
the caching decorators for now because that's going to require some
more involved work, and this unblocks my current experimentation.

Differential Revision: https://phab.mercurial-scm.org/D6732

mercurial/localrepo.py

@@ -28,7 +28,6 b' from . import ('
     branchmap,
     bundle2,
     changegroup,
-    changelog,
     color,
     context,
     dirstate,
@@ -41,7 +40,6 b' from . import ('
     filelog,
     hook,
     lock as lockmod,
-    manifest,
     match as matchmod,
     merge as mergemod,
     mergeutil,
@@ -1304,14 +1302,11 b' class localrepository(object):'
 
     @storecache('00changelog.i')
     def changelog(self):
-        return changelog.changelog(self.svfs,
-                                   trypending=txnutil.mayhavepending(self.root))
+        return self.store.changelog(txnutil.mayhavepending(self.root))
 
     @storecache('00manifest.i')
     def manifestlog(self):
-        rootstore = manifest.manifestrevlog(self.svfs)
-        return manifest.manifestlog(self.svfs, self, rootstore,
-                                    self._storenarrowmatch)
+        return self.store.manifestlog(self, self._storenarrowmatch)
 
     @repofilecache('dirstate')
     def dirstate(self):

mercurial/store.py

@@ -15,7 +15,9 b' import stat'
 
 from .i18n import _
 from . import (
+    changelog,
     error,
+    manifest,
     node,
     policy,
     pycompat,
@@ -379,6 +381,14 b' class basicstore(object):'
         l.sort()
         return l
 
+    def changelog(self, trypending):
+        return changelog.changelog(self.vfs, trypending=trypending)
+
+    def manifestlog(self, repo, storenarrowmatch):
+        rootstore = manifest.manifestrevlog(self.vfs)
+        return manifest.manifestlog(
+            self.vfs, repo, rootstore, storenarrowmatch)
+
     def datafiles(self, matcher=None):
         return self._walk('data', True) + self._walk('meta', True)