Re: Need to unhook a function in Makefile-mode

["Colin S. Miller" <no-spam-thank-you@csmiller.demon.co.uk>]

jgombos wrote:
> I have a C++ write file hook to automatically untabify the whole buffer
> before saving.  It works great, but then when I open a Makefile in
> Makefile-mode, the hook persists, which ruins Makefiles.  My .emacs file
> contains:
> <pre>
> ;; Define untabify-buffer.
> (defun untabify-buffer()
>   (interactive)
>   "Untabify the current buffer.  Return nil.
> 
>   Must return nil, if added to write-file-hooks."
>   (save-excursion
>     (goto-char (point-min))
>     (while (re-search-forward "[ \t]+$" nil t)
>       (delete-region (match-beginning 0) (match-end 0)))
>     (goto-char (point-min))
>     (if (search-forward "\t" nil t)
>         (untabify (1- (point)) (point-max))))
>   nil)
> 
> ;; LANGUAGE HOOKS ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
> (add-hook 'c++-mode-hook
> 	  '(lambda ()
> 		  (c-set-style "whitesmith")
> 		  (add-hook 'write-file-hooks 'untabify-buffer)
> 		  ))

Jgombos,

try using local-write-file-hooks, which is the buffer-local version of write-file-hooks,
or at least it is in XEmacs.


Failing that, see add-local-hook,

Failing that
try

(add-hook 'ctypes-load-hook
  '(lambda ()
    (c-set-style "whitesmith")
    (add-hook 'write-file-hooks
       '(lambda ()
        (if (eq major-mode 'c++-mode) (untabify-buffer))))))


Ctypes is used by C, C++, and C# modes.

IIRC, -load-hooks are only called once, when the mode is first loaded,
whereas -mode-hooks are called each time a buffer enters that mode.


HTH,
Colin S. Miller

-- 
Replace the obvious in my email address with the first three letters of the hostname to reply.