maintainance: run rebuildfncache for Mercurial.

rhodecode/lib/repo_maintenance.py

@@ -148,6 +148,15 b' class HGUpdateCaches(MaintenanceTask):'
         return res
 
 
+class HGRebuildFnCaches(MaintenanceTask):
+    human_name = 'HG rebuild fn caches'
+
+    def run(self):
+        instance = self.db_repo.scm_instance()
+        res = instance.hg_rebuild_fn_cache()
+        return res
+
+
 class SVNVerify(MaintenanceTask):
     human_name = 'SVN Verify repo'
 
@@ -162,7 +171,7 b' class RepoMaintenance(object):'
     Performs maintenance of repository based on it's type
     """
     tasks = {
-        'hg': [HGVerify, HGUpdateCaches],
+        'hg': [HGVerify, HGUpdateCaches, HGRebuildFnCaches],
         'git': [GitFSCK, GitGC, GitRepack],
         'svn': [SVNVerify],
     }

rhodecode/lib/vcs/backends/hg/repository.py

@@ -290,6 +290,12 b' class MercurialRepository(BaseRepository'
         self._remote.invalidate_vcs_cache()
         return update_cache
 
+    def hg_rebuild_fn_cache(self):
+        update_cache = self._remote.hg_rebuild_fn_cache()
+
+        self._remote.invalidate_vcs_cache()
+        return update_cache
+
     def get_common_ancestor(self, commit_id1, commit_id2, repo2):
         if commit_id1 == commit_id2:
             return commit_id1