As stated in another post you can add your custom switches to
command-switch-alist and emacs will call the handler function for any matching switch passed in on the command line. However, this operation is done after your
.emacs file has been evaluated. This is fine for most cases but you may wish for a command line argument to alter the execution path or behaviour of your
.emacs evaluation; I often do this to enable/disable configuration chunks (mainly for debugging).
To achieve this you can read
command-line-args and check for your switch manually and then delete it from the list, this will stop
emacs complaining about an unknown argument.
(setq my-switch-found (member "-myswitch" command-line-args)) (setq command-line-args (delete "-myswitch" command-line-args))
Which can alter your
.emacs evaluation like so:
(unless my-switch-found (message "Didn't find inhibit switch, loading some config.") ...)
And you could build this into a single step:
;; This was written in SO text-box, not been tested. (defun found-custom-arg (switch) (let ((found-switch (member switch command-line-args))) (setq command-line-args (delete switch command-line-args)) found-switch)) (unless (found-custom-arg "-myswitch") (message "Loading config...") ...)