how to open *.info file in emacs in info mode?

Question

C-x C-f blah.info opens the file in fundametal mode. I used apropos and found Info-mode which I thought might change from fundamental mode

Answer 1

Plain (info `file-name') opens file in info mode. (info) probably does something besides just setting Info-mode. So I would use something like this:

(defun info-mode ()
  (interactive)
  (let ((file-name (buffer-file-name)))
    (kill-buffer (current-buffer))
    (info file-name)))
(add-to-list 'auto-mode-alist '("\\.info\\'" . info-mode))