revlog: move nodemap update within the index code

revlog: move nodemap update within the index code

Since the nodemap data now live in the index, it should be the index
responsibility to ensure the data are up to date.

This work is part of a refactoring to unify the revlog index and the nodemap.
This unification prepare the use of a persistent nodemap.

Differential Revision: https://phab.mercurial-scm.org/D7319

--- a/mercurial/pure/parsers.py	Sat Nov 02 15:46:47 2019 +0100
+++ b/mercurial/pure/parsers.py	Sun Nov 03 00:15:12 2019 +0100
@@ -62,6 +62,8 @@
         return self._lgt + len(self._extra)
 
     def append(self, tup):
+        if 'nodemap' in vars(self):
+            self.nodemap[tup[7]] = len(self)
         self._extra.append(tup)
 
     def _check_index(self, i):

--- a/mercurial/revlog.py	Sat Nov 02 15:46:47 2019 +0100
+++ b/mercurial/revlog.py	Sun Nov 03 00:15:12 2019 +0100
@@ -213,6 +213,10 @@
             nodemap[n] = r
         return nodemap
 
+    def append(self, tup):
+        self.nodemap[tup[7]] = len(self)
+        super(revlogoldindex, self).append(tup)
+
     def clearcaches(self):
         self.__dict__.pop('nodemap', None)
 
@@ -2189,7 +2193,6 @@
             node,
         )
         self.index.append(e)
-        self.nodemap[node] = curr
 
         # Reset the pure node cache start lookup offset to account for new
         # revision.