tomdl89

(defun auto-stage-untracked-file ()
  "Add an empty version of the currently-visited file to the index
iff it is in a git repo, but untracked."
  (when (and (magit-git-dir)
             (not (magit-file-tracked-p (buffer-file-name)))
             this-command ; nil for auto-save
             (y-or-n-p "Add (intent-to-add) file to git index?"))
    (magit-run-git "add" "--intent-to-add" "--" (buffer-file-name))))

(add-hook 'after-save-hook 'auto-stage-untracked-file)