--- a/hgext3rd/evolve/__init__.py	Sun Jul 23 06:11:33 2017 +0200
+++ b/hgext3rd/evolve/__init__.py	Sun Jul 23 06:14:09 2017 +0200
@@ -2110,22 +2110,6 @@
     finally:
         lockmod.release(wlock)
 
-def _deletebookmark(repo, repomarks, bookmarks):
-    wlock = lock = tr = None
-    try:
-        wlock = repo.wlock()
-        lock = repo.lock()
-        tr = repo.transaction('prune')
-        bmchanges = []
-        for bookmark in bookmarks:
-            bmchanges.append((bookmark, None))
-        compat.bookmarkapplychanges(repo, tr, bmchanges)
-        tr.close()
-        for bookmark in sorted(bookmarks):
-            repo.ui.write(_("bookmark '%s' deleted\n") % bookmark)
-    finally:
-        lockmod.release(tr, lock, wlock)
-
 def _getmetadata(**opts):
     metadata = {}
     date = opts.get('date')
@@ -2192,7 +2176,7 @@
         repomarks, revs = reachablefrombookmark(repo, revs, bookmarks)
         if not revs:
             # no revisions to prune - delete bookmark immediately
-            _deletebookmark(repo, repomarks, bookmarks)
+            rewriteutil.deletebookmark(repo, repomarks, bookmarks)
 
     if not revs:
         raise error.Abort(_('nothing to prune'))
@@ -2295,7 +2279,7 @@
 
         # update bookmarks
         if bookmarks:
-            _deletebookmark(repo, repomarks, bookmarks)
+            rewriteutil.deletebookmark(repo, repomarks, bookmarks)
 
         # create markers
         obsolete.createmarkers(repo, relations, metadata=metadata)

--- a/hgext3rd/evolve/rewriteutil.py	Sun Jul 23 06:11:33 2017 +0200
+++ b/hgext3rd/evolve/rewriteutil.py	Sun Jul 23 06:14:09 2017 +0200
@@ -72,6 +72,22 @@
         raise error.Abort(msg, hint=hint)
     return root, head
 
+def deletebookmark(repo, repomarks, bookmarks):
+    wlock = lock = tr = None
+    try:
+        wlock = repo.wlock()
+        lock = repo.lock()
+        tr = repo.transaction('prune')
+        bmchanges = []
+        for bookmark in bookmarks:
+            bmchanges.append((bookmark, None))
+        compat.bookmarkapplychanges(repo, tr, bmchanges)
+        tr.close()
+        for bookmark in sorted(bookmarks):
+            repo.ui.write(_("bookmark '%s' deleted\n") % bookmark)
+    finally:
+        lockmod.release(tr, lock, wlock)
+
 def presplitupdate(repo, ui, prev, ctx):
     """prepare the working directory for a split (for topic hooking)
     """