remote-hg: safer bookmark pushing

diff --git a/contrib/remote-helpers/git-remote-hg b/contrib/remote-helpers/git-remote-hg
index 2cd199662632b1e9873adc32a5c201f42c27fcd2..dcf6c989a724a964de93202daa9c2c2eb4d2933f 100755 (executable)
--- a/contrib/remote-helpers/git-remote-hg
+++ b/contrib/remote-helpers/git-remote-hg
@@ -782,6 +782,8 @@ def do_export(parser):
             continue
 
         if peer:
+            rb = peer.listkeys('bookmarks')
+            old = rb.get(bmark, '')
             if not peer.pushkey('bookmarks', bmark, old, new):
                 print "error %s" % ref
                 continue