[PATCH] emacs: Don't record undo information for search or show buffers.

[Austin Clements]

There's no reason to record undo information for read-only,
programmatically-constructed buffers.  The undo list just chews up
memory keeping track of our calls to insert.
---
 emacs/notmuch-show.el |    2 ++
 emacs/notmuch.el      |    2 ++
 2 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el
index d5c95d8..7689867 100644
--- a/emacs/notmuch-show.el
+++ b/emacs/notmuch-show.el
@@ -843,6 +843,8 @@ buffer."
 	 (inhibit-read-only t))
     (switch-to-buffer buffer)
     (notmuch-show-mode)
+    ;; Don't track undo information for this buffer
+    (set 'buffer-undo-list t)
 
     (setq notmuch-show-thread-id thread-id)
     (setq notmuch-show-parent-buffer parent-buffer)
diff --git a/emacs/notmuch.el b/emacs/notmuch.el
index c1827cc..a8e4d62 100644
--- a/emacs/notmuch.el
+++ b/emacs/notmuch.el
@@ -920,6 +920,8 @@ The optional parameters are used as follows:
   (let ((buffer (get-buffer-create (notmuch-search-buffer-title query))))
     (switch-to-buffer buffer)
     (notmuch-search-mode)
+    ;; Don't track undo information for this buffer
+    (set 'buffer-undo-list t)
     (set 'notmuch-search-query-string query)
     (set 'notmuch-search-oldest-first oldest-first)
     (set 'notmuch-search-target-thread target-thread)
-- 
1.7.7.2