revlog: create the revlog object at the repository level

There is currently no value set in it, but we will be able to start centralise
config parsing at the repository level.

mercurial/localrepo.py

@@ -1068,6 +1068,10 b' def resolverevlogstorevfsoptions(ui, req'
     options = {}
     options[b'flagprocessors'] = {}
 
+    feature_config = options[b'feature-config'] = revlog.FeatureConfig()
+    data_config = options[b'data-config'] = revlog.DataConfig()
+    delta_config = options[b'delta-config'] = revlog.DeltaConfig()
+
     if requirementsmod.REVLOGV1_REQUIREMENT in requirements:
         options[b'revlogv1'] = True
     if requirementsmod.REVLOGV2_REQUIREMENT in requirements:

mercurial/revlog.py

@@ -444,15 +444,22 b' class revlog:'
         assert target[0] in ALL_KINDS
         assert len(target) == 2
         self.target = target
-        self.feature_config = FeatureConfig(
-            censorable=censorable,
-            canonical_parent_order=canonical_parent_order,
-        )
-        self.data_config = DataConfig(
-            check_ambig=checkambig,
-            mmap_large_index=mmaplargeindex,
-        )
-        self.delta_config = DeltaConfig()
+        if b'feature-config' in self.opener.options:
+            self.feature_config = self.opener.options[b'feature-config'].copy()
+        else:
+            self.feature_config = FeatureConfig()
+        self.feature_config.censorable = censorable
+        self.feature_config.canonical_parent_order = canonical_parent_order
+        if b'data-config' in self.opener.options:
+            self.data_config = self.opener.options[b'data-config'].copy()
+        else:
+            self.data_config = DataConfig()
+        self.data_config.check_ambig = checkambig
+        self.data_config.mmap_large_index = mmaplargeindex
+        if b'delta-config' in self.opener.options:
+            self.delta_config = self.opener.options[b'delta-config'].copy()
+        else:
+            self.delta_config = DeltaConfig()
 
         # 3-tuple of (node, rev, text) for a raw revision.
         self._revisioncache = None