--- a/mercurial/bookmarks.py Mon Jun 12 23:02:48 2017 -0700
+++ b/mercurial/bookmarks.py Tue Jun 13 11:10:22 2017 -0700
@@ -705,3 +705,24 @@
deactivate(repo)
del marks[mark]
marks.recordchange(tr)
+
+def rename(repo, tr, old, new, force=False, inactive=False):
+ """rename a bookmark from old to new
+
+ If force is specified, then the new name can overwrite an existing
+ bookmark.
+
+ If inactive is specified, then do not activate the new bookmark.
+
+ Raises an abort error if old is not in the bookmark store.
+ """
+ marks = repo._bookmarks
+ mark = checkformat(repo, new)
+ if old not in marks:
+ raise error.Abort(_("bookmark '%s' does not exist") % old)
+ marks.checkconflict(mark, force)
+ marks[mark] = marks[old]
+ if repo._activebookmark == old and not inactive:
+ activate(repo, mark)
+ del marks[old]
+ marks.recordchange(tr)