mu4e: auto start mu4e when sending command

Start mu4e if not already; with the transient menus it's easier possible
to try to do things with mu4e before it is started, so handle that
automatically.

mu4e/mu4e-server.el

@@ -211,11 +211,6 @@ It is the mu4e-version of \"mu find <query> --analyze\"."
    mu4e--last-query-buffer-name
    (mu4e-server-last-query)))
 
-;; temporary
-(defun mu4e--server-xapian-single-threaded-p()
-  "Are we using Xapian in single-threaded mode?"
-  (plist-get mu4e--server-props :xapian-single-threaded))
-
 ;;; Handling raw server data
 
 (defvar mu4e--server-buf nil
@@ -300,7 +295,6 @@ This for the few sexps we get from the mu server that support
           (read (current-buffer)))
       val)))
 
-
 (defun mu4e--server-filter (_proc str)
   "Filter string STR from PROC.
 This processes the \"mu server\" output. It accumulates the
@@ -565,12 +559,18 @@ You cannot run the repl when mu4e is running (or vice-versa)."
      (t
       (error "Something bad happened to the mu server process")))))
 
+(declare-function mu4e "mu4e")
+(defvar mu4e--initialized)
+
 (defun mu4e--server-call-mu (form)
   "Call the mu server with some command FORM."
+  (unless mu4e--initialized
+    (mu4e 'background))
+  ;; ensure the server is running as well
   (unless (mu4e-running-p)
     (mu4e--server-start))
   ;; in single-threaded mode, mu can't accept our command right now.
-  (when (and (mu4e--server-xapian-single-threaded-p) mu4e--server-indexing)
+  (when mu4e--server-indexing
     (mu4e-message "Cannot handle command while indexing, please retry later."))
   (let* ((print-length nil) (print-level nil)
          (cmd (format "%S" form)))

mu4e/mu4e.el

@@ -56,13 +56,16 @@
 (with-eval-after-load 'desktop
   (eval '(add-to-list 'desktop-modes-not-to-save 'mu4e-compose-mode)))
 
+(defvar mu4e--initialized nil
+  "Is mu4e initialized? Only needed once per session.")
+
 ;;;###autoload
 (defun mu4e (&optional background)
   "If mu4e is not running yet, start it.
 Then, show the main window, unless BACKGROUND (prefix-argument)
 is non-nil."
   (interactive "P")
-  (if (not (mu4e-running-p))
+  (if (not mu4e--initialized)
       (progn
         (mu4e--init-handlers)
         (mu4e--start (unless background #'mu4e--main-view)))
@@ -148,12 +151,13 @@ Otherwise, check requirements, then start mu4e. When successful, invoke
   (mu4e-modeline-mode (if mu4e-modeline-support 1 -1))
   ;; redraw main buffer if there is one.
   (add-hook 'mu4e-query-items-updated-hook #'mu4e--main-redraw)
-  (mu4e--query-items-refresh 'reset-baseline)
+  (setq mu4e--initialized t) ;; last before we call the server.
   (mu4e--server-ping)
   ;; ask for the maildir-list
   (mu4e--server-data 'maildirs)
   ;; maybe request the list of contacts, automatically refreshed after
   ;; re-indexing
+  (mu4e--query-items-refresh 'reset-baseline)
   (unless mu4e--contacts-set
     (mu4e--request-contacts-maybe)))