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, 2 insertions, 2 deletions

diff --git a/notmuch.el b/notmuch.el
index 8894a8e1..9de16e00 100644
--- a/notmuch.el
+++ b/notmuch.el
@@ -874,8 +874,8 @@ This function advances point to the next line when finished."
       (goto-char (point-min))
       (save-excursion
 	(if oldest-first
-	    (call-process "notmuch" nil t nil "search" query)
-	  (call-process "notmuch" nil t nil "search" "--reverse" query))
+	    (call-process "notmuch" nil t nil "search" "--sort=oldest-first" query)
+	  (call-process "notmuch" nil t nil "search" "--sort=newest-first" query))
 	(notmuch-search-markup-thread-ids)
 	))))