Merge restored get_ancestry() method from Zygmunt Krynicki to fix interactions with git.

1 files changed, 2 insertions, 1 deletions

diff --git a/branch_updater.py b/branch_updater.py
index fcb13d5..e9a8aa5 100644
--- a/branch_updater.py
+++ b/branch_updater.py
@@ -165,7 +165,8 @@ class BranchUpdater(object):
         # apply tags known in this branch
         my_tags = {}
         if self.tags:
-            ancestry = self.repo.get_ancestry(last_rev_id)
+            graph = self.repo.get_graph()
+            ancestry = [r for (r, ps) in graph.iter_ancestry([last_rev_id]) if ps is not None]
             for tag,rev in self.tags.items():
                 if rev in ancestry:
                     my_tags[tag] = rev