# HG changeset patch
# User timeless@gmail.com
# Date 1472230665 0
# Node ID c413e7c96265ef8e247cdac002d90e0113444994
# Parent  fe76e9c92fff80f956dd92e10b177ec2a9bb8c4d
init: guard _namemap with repo.topics (issue5351)

This prevents reading extra data on all repo commits
when there is no topic for a given name.

_namemap is called a lot, and it is often called for commit
shas -- which should pretty much never be names of topics...

diff -r fe76e9c92fff -r c413e7c96265 hgext3rd/topic/__init__.py
--- a/hgext3rd/topic/__init__.py	Fri Aug 26 16:52:02 2016 +0000
+++ b/hgext3rd/topic/__init__.py	Fri Aug 26 16:57:45 2016 +0000
@@ -84,6 +84,8 @@
             msg = _('cannot resolve "%s": topic "%s" has only %d changesets')
             raise error.Abort(msg % (name, topic, len(revs)))
         return [repo[r].node()]
+    if not name in repo.topics:
+        return []
     return [ctx.node() for ctx in
             repo.set('not public() and extra(topic, %s)', name)]