notmuch search: Change default search order to be newest messages first.

This is what most people want for a _search_ command. It's often
different for actually reading mail in an inbox, (where it makes more
sense to have results displayed in chronological order), but in such a
case, ther user is likely using an interface that can simply pass the
--sort=oldest-first option to "notmuch search".

Here we're also change the sort enum from NOTMUCH_SORT_DATE and
NOTMUCH_SORT_DATE_REVERSE to NOTMUCH_SORT_OLDEST_FIRST and
NOTMUCH_SORT_NEWEST_FIRST. Similarly we replace the --reverse option
to "notmuch search" with two options: --sort=oldest-first and
--sort=newest-first.

Finally, these changes are all tracked in the emacs interface, (which
has no change in its behavior).

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/thread.cc b/lib/thread.cc
index baa9e7e8..9bb6a5e1 100644
--- a/lib/thread.cc
+++ b/lib/thread.cc
@@ -258,7 +258,7 @@ _notmuch_thread_create (void *ctx,
     thread->oldest = 0;
     thread->newest = 0;
 
-    notmuch_query_set_sort (thread_id_query, NOTMUCH_SORT_DATE);
+    notmuch_query_set_sort (thread_id_query, NOTMUCH_SORT_OLDEST_FIRST);
 
     for (messages = notmuch_query_search_messages (thread_id_query, 0, -1);
 	 notmuch_messages_has_more (messages);