# HG changeset patch
# User Joel Rosdahl <joel@rosdahl.net>
# Date 2008-10-25 17:05:52
# Node ID 8b81d1e2dc04e34206965836fee3edd4d6ff8ef6
# Parent  104a8324798ec962804308c01fbb08fe2bd5797b

bookmarks: Only save undo.bookmarks if bookmarks exist

Otherwise the command will abort when there is no .hg/bookmarks file.

diff --git a/hgext/bookmarks.py b/hgext/bookmarks.py
--- a/hgext/bookmarks.py
+++ b/hgext/bookmarks.py
@@ -52,7 +52,8 @@ def write(repo, refs):
     We also store a backup of the previous state in undo.bookmarks that
     can be copied back on rollback.
     '''
-    util.copyfile(repo.join('bookmarks'), repo.join('undo.bookmarks'))
+    if os.path.exists(repo.join('bookmarks')):
+        util.copyfile(repo.join('bookmarks'), repo.join('undo.bookmarks'))
     file = repo.opener('bookmarks', 'w+')
     for refspec, node in refs.items():
         file.write("%s %s\n" % (hex(node), refspec))