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From: Andreas Politz <politza@fh-trier.de>
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Subject: Re: auto-revert-mode
Date: Wed, 15 Sep 2010 12:29:17 +0200
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Stefan Monnier <monnier@iro.umontreal.ca> writes:

>>>> (add-to-list
>>>> 'find-file-hook
>>>> (lambda nil
>>>> (when (equal (file-name-extension (buffer-file-name)) "log")
>>>> (auto-revert-mode 1) ;; or (auto-revert-tail-mode 1) !!
>>>> )))
>>>> 
>>>> I don't know more efficient way to do this.
>>>> 
>>> 
>>> Here is another solution:
>>> 
>>> (add-to-list 'auto-mode-alist 
>>> '("\\.foo\\'" (lambda () (auto-revert-mode 1)) t))
>
> In Emacs-24 you'll be able to just say
>
>    (add-to-list 'auto-mode-alist '("\\.foo\\'" auto-revert-mode t))
>
>> With the sideeffect of inhibiting the proper major-mode for .foo files.
>> Maybe this calls for another variable `auto-minor-mode-alist'.
>
> No, the t he put at the end tells Emacs to keep looking for a major mode

But with the extension removed.  At least that's how the 3rd value is
explained in the documentation.

-ap