emacs: use define-derived-mode for defining modes.

This sets up and runs all the correct hooks and reduces some redundancy.

emacs/notmuch-hello.el

@@ -671,7 +671,7 @@ with `notmuch-hello-query-counts'."
   "Keymap for \"notmuch hello\" buffers.")
 (fset 'notmuch-hello-mode-map notmuch-hello-mode-map)
 
-(defun notmuch-hello-mode ()
+(define-derived-mode notmuch-hello-mode fundamental-mode "notmuch-hello"
  "Major mode for convenient notmuch navigation. This is your entry portal into notmuch.
 
 Saved searches are \"bookmarks\" for arbitrary queries. Hit RET
@@ -702,13 +702,7 @@ The screen may be customized via `\\[customize]'.
 Complete list of currently available key bindings:
 
 \\{notmuch-hello-mode-map}"
- (interactive)
- (kill-all-local-variables)
  (setq notmuch-buffer-refresh-function #'notmuch-hello-update)
- (use-local-map notmuch-hello-mode-map)
- (setq major-mode 'notmuch-hello-mode
-	mode-name "notmuch-hello")
- (run-mode-hooks 'notmuch-hello-mode-hook)
  ;;(setq buffer-read-only t)
 )
 

emacs/notmuch-show.el

@@ -1454,7 +1454,7 @@ reset based on the original query."
   "Keymap for \"notmuch show\" buffers.")
 (fset 'notmuch-show-mode-map notmuch-show-mode-map)
 
-(defun notmuch-show-mode ()
+(define-derived-mode notmuch-show-mode fundamental-mode "notmuch-show"
   "Major mode for viewing a thread with notmuch.
 
 This buffer contains the results of the \"notmuch show\" command
@@ -1482,12 +1482,7 @@ You can add or remove arbitrary tags from the current message with
 All currently available key bindings:
 
 \\{notmuch-show-mode-map}"
-  (interactive)
-  (kill-all-local-variables)
   (setq notmuch-buffer-refresh-function #'notmuch-show-refresh-view)
-  (use-local-map notmuch-show-mode-map)
-  (setq major-mode 'notmuch-show-mode
-	mode-name "notmuch-show")
   (setq buffer-read-only t
 	truncate-lines t))
 

emacs/notmuch-tree.el

@@ -803,7 +803,7 @@ This function inserts a collection of several complete threads as
 passed to it by notmuch-tree-process-filter."
   (mapc 'notmuch-tree-insert-forest-thread forest))
 
-(defun notmuch-tree-mode ()
+(define-derived-mode notmuch-tree-mode fundamental-mode "notmuch-tree"
   "Major mode displaying messages (as opposed to threads) of of a notmuch search.
 
 This buffer contains the results of a \"notmuch tree\" of your
@@ -817,12 +817,7 @@ Complete list of currently available key bindings:
 
 \\{notmuch-tree-mode-map}"
 
-  (interactive)
-  (kill-all-local-variables)
   (setq notmuch-buffer-refresh-function #'notmuch-tree-refresh-view)
-  (use-local-map notmuch-tree-mode-map)
-  (setq major-mode 'notmuch-tree-mode
-	mode-name "notmuch-tree")
   (hl-line-mode 1)
   (setq buffer-read-only t
 	truncate-lines t))

emacs/notmuch.el

@@ -331,7 +331,7 @@ This face is the default value for the \"unread\" tag in
   :group 'notmuch-search
   :group 'notmuch-faces)
 
-(defun notmuch-search-mode ()
+(define-derived-mode notmuch-search-mode fundamental-mode "notmuch-search"
   "Major mode displaying results of a notmuch search.
 
 This buffer contains the results of a \"notmuch search\" of your
@@ -361,8 +361,6 @@ new, global search.
 Complete list of currently available key bindings:
 
 \\{notmuch-search-mode-map}"
-  (interactive)
-  (kill-all-local-variables)
   (make-local-variable 'notmuch-search-query-string)
   (make-local-variable 'notmuch-search-oldest-first)
   (make-local-variable 'notmuch-search-target-thread)
@@ -370,10 +368,7 @@ Complete list of currently available key bindings:
   (setq notmuch-buffer-refresh-function #'notmuch-search-refresh-view)
   (set (make-local-variable 'scroll-preserve-screen-position) t)
   (add-to-invisibility-spec (cons 'ellipsis t))
-  (use-local-map notmuch-search-mode-map)
   (setq truncate-lines t)
-  (setq major-mode 'notmuch-search-mode
-	mode-name "notmuch-search")
   (setq buffer-read-only t))
 
 (defun notmuch-search-get-result (&optional pos)