Re: C-c C-c for a file extension

[Kevin Rodgers]

Rares Vernica wrote:
> How can I define a C-c C-c command for a certain file extension.

Usuallly a file extension is associated with a major mode (via
auto-mode-alist).  What does `C-h v major-mode' tell you when visiting
such a file?

> For example, I have the gnuplot (.plt) file and I would like to run 
> "gnuplot %f" (where %f is the file name) when I press C-c C-c on that file.

Hmmm, when I visit a .plt file it's in Fundamental mode.  You could
define your own Gnuplot mode (with a local keymap that binds `C-c C-c'
to an Emacs command that runs gnuplot on the visited file) and associate
it with the .plt extension (e.g. with define-generic-mode), but it'd be
a lot easier to use `M-x compile' in conjunction with this:

(defun set-gnuplot-compile-command ()
  (set (make-local-variable 'compile-command)
       (format "gnuplot %s" (file-name-nondirectory buffer-file-name))))

(add-hook 'find-file-hook 'set-gnuplot-compile-command)
(add-hook 'find-file-not-found-hooks 'set-gnuplot-compile-command)

--
Kevin