I normally start Emacs in daemon mode and reload my last session with the desktop package. This causes whichever file desktop-read open last to remain visited in a buffer which is selected in the window which is selected in the “dummy” frame created for the daemon. As far as Emacs is concerned, this file is visible in a frame. But as far as I'm concerned, it's not.
I could fix all my code to skip the daemon's frame… if I could identify it. But it would be easier to just make the daemon frame visit a buffer whose visibility I don't particularly care about, like *Messages* or *Minibuf-0.
What can I put in my init file to
- identify whether Emacs was started in daemon mode;
- identify the frame corresponding to the daemon;
- make this frame visit a harmless buffer, or kill it (what can go wrong if I do that), or otherwise not let it continue “showing” some interesting buffer?
Test by running emacs --daemon -q -l foo.emacs where foo.emacs is
;; -*-emacs-lisp-*- (setq server-name "foo") ;; Simulate loading a desktop session (find-file "~/.emacs") ;; Test code (defun foo () (interactive) (let* ((buffer (find-buffer-visiting "~/.emacs")) (window (get-buffer-window buffer t))) (if (interactive-p) (message "%S" window) window))) ;; Here goes the code I want then I want emacsclient -s foo -e '(foo)' to return nil.
