lib: Add the exclude flag to notmuch_query_search_threads

Add the NOTMUCH_MESSAGE_FLAG_EXCLUDED flag to
notmuch_query_search_threads. Implemented by inspecting the tags
directly in _notmuch_thread_create/_thread_add_message rather than as
a Xapian query for speed reasons.

Note notmuch_thread_get_matched_messages now returns the number of
non-excluded matching messages. This API is not totally desirable but
fixing it means breaking binary compatibility so we delay that.

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/query.cc b/lib/query.cc
index ef2a11f8..ab18fbc6 100644
--- a/lib/query.cc
+++ b/lib/query.cc
@@ -475,6 +475,7 @@ notmuch_threads_get (notmuch_threads_t *threads)
 				   threads->query->notmuch,
 				   doc_id,
 				   &threads->match_set,
+				   threads->query->exclude_terms,
 				   threads->query->sort);
 }