debugupdatecache: also warm rev branch cache

We add basic code to have `debugupdatecache` ensure that the rev branch cache
is fully warmed. This only affects the `debugupdatecache` command, not normal
transaction operation.

mercurial/debugcommands.py

@@ -2482,7 +2482,7 b" def debuguiprompt(ui, prompt=''):"
 def debugupdatecaches(ui, repo, *pats, **opts):
     """warm all known caches in the repository"""
     with repo.wlock(), repo.lock():
-        repo.updatecaches()
+        repo.updatecaches(full=True)
 
 @command('debugupgraderepo', [
     ('o', 'optimize', [], _('extra optimization to perform'), _('NAME')),

mercurial/localrepo.py

@@ -1519,12 +1519,15 b' class localrepository(object):'
         return updater
 
     @unfilteredmethod
-    def updatecaches(self, tr=None):
+    def updatecaches(self, tr=None, full=False):
         """warm appropriate caches
 
         If this function is called after a transaction closed. The transaction
         will be available in the 'tr' argument. This can be used to selectively
         update caches relevant to the changes in that transaction.
+
+        If 'full' is set, make sure all caches the function knows about have
+        up-to-date data. Even the ones usually loaded more lazily.
         """
         if tr is not None and tr.hookargs.get('source') == 'strip':
             # During strip, many caches are invalid but
@@ -1536,6 +1539,12 b' class localrepository(object):'
             self.ui.debug('updating the branch cache\n')
             branchmap.updatecache(self.filtered('served'))
 
+        if full:
+            rbc = self.revbranchcache()
+            for r in self.changelog:
+                rbc.branchinfo(r)
+            rbc.write()
+
     def invalidatecaches(self):
 
         if '_tagscache' in vars(self):