Re: dns mode

[Kevin Rodgers]

Dmitry Dzhus wrote:
> Nachiket Gokhale wrote:
> > It appears that I cannot save files with the extension "zone" e.g.
> > "foobar.zone" because emacs has loaded something called dns-mode by
> > default. How do I turn this thing off? What change do I have to make
> > to my .emacs.d/init.el file?
>
> Emacs associates file extensions and major modes by looking into
> `auto-mode-alist` variable, you can clean all `.zone`-matching entries
> from it if you don't want Emacs to turn on DNS mode when editing such files:
>
>     (setq auto-mode-alist (delete '("\\.\\(soa\\|zone\\)\\'" . dns-mode) 
> auto-mode-alist))
>     (setq auto-mode-alist (delete '("\\.zone\\'" . zone-mode) auto-mode-alist))

Oddly enough, my emacs (22.3) -Q has 2 entries for dns-mode in auto-mode-alist:

("\\.soa\\'" . dns-mode)
("\\.\\(soa\\|zone\\)\\'" . dns-mode)

So I would do something like:

(let ((auto-dns))
  (while (setq auto-dns (rassq 'dns-mode auto-mode-alist))
    (setq auto-mode-alist (delq auto-dns auto-mode-alist))))

And similarly for zone-mode.  This also has the advantage of working
regardless of the regexp used to match the file name.

> You may get more information by reading section 27.1 of GNU Emacs manual
> («How Major Modes are Chosen»).

--
Kevin Rodgers
Denver, Colorado, USA