From cd109ef55916389c481fc6974a4739fdf1899c32 Mon Sep 17 00:00:00 2001
From: Sebastian Spaeth <sebastian@sspaeth.de>
Date: Fri, 19 Mar 2010 09:39:23 +0100
Subject: [PATCH] notmuch restore: only delete a message's old tags if they are
 not a subset of the new ones.

---
 notmuch | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/notmuch b/notmuch
index d28c6ea4..e4e07bcf 100755
--- a/notmuch
+++ b/notmuch
@@ -235,7 +235,8 @@ if __name__ == '__main__':
 
          #set the new tags
          msg.freeze()
-         msg.remove_all_tags()
+         #only remove tags if the new ones are not a superset anyway
+         if not (new_tags > old_tags): msg.remove_all_tags()
          for tag in new_tags: msg.add_tag(tag)
          msg.thaw()