Question

I use ESS-Emacs to edit my R scripts.

Whenever I load a R script it is always followed by:

1. C-x 3 (I prefer this split)
2. M-x R (Opens R)

Is there a way to automate steps 1. and 2. every time I type on the terminal:

emacs misc_r_file.r

Just to make myself clear – I don’t want either 1 or 2 if I have already opened a R script in emacs. Steps 1 and 2 should be executed only when I open a fresh emacs process.

Thank you for your help in advance.

Answer 1

Is there a way to do this? Of course, it’s just programming.

(defvar r-file-loaded-p nil
   "non-nil if an R file has been opened")

(defun maybe-setup-r ()
   (when (not r-file-loaded-p)
       (split-window-horizontally)
       (R)
       (setf r-file-loaded-p t)))

(add-hook 'r-mode-hook #'maybe-setup-r)

Why don’t you persist your Emacs session, though?