VTags dynamic tags specification

["Denis Golovan" <d.golovan.ml@gmail.com>]

Hi, all

Does anybody uses VTags?
It works well, but I'd like to automate it's tags file adding.
Unfortunately, I have not managed to do that.
Every time after opening project file, it asks for tags file to enter
manually. In fact tags file lies in ./tmp/tags file relative to dpr.

Here is that .emacs part
;;======================VTAGS======================
(load "vtags")
(defun dsg-tags-add-table (file)
 "add tags table"
 (message "Tags %s" file)

 ;;That's where I try to tell it tags file <<<<<<<<<<<<<<
 ;(add-to-list 'tags-table-list file)
 ;(add-to-list 'tags-table-list (quote (file)))
 ;(setq tags-table-computed-list (tags-compute-list (get-tagfileinfo file)))
 ;(custom-set-variables
 ;  '(tags-table-list (quote (file)))
 ;)
 ;;No way works actually :( <<<<<<<<<<<<<<
 (vtags-mode)
 (message "Tags %s" file)
)

(defun dsg-tags-add ()
 "add tags table"
 (if (string-match "\\.dpr$" (buffer-file-name))
     (dsg-tags-add-table
        (concat (file-name-directory (buffer-file-name)) "tmp/tags")
     )
 )
)

(defun dsg-tags ()
 "add tags table"
 (interactive)
 (dsg-tags-add)
)


(add-hook 'find-file-hooks
 (function
   (lambda ()
      (dsg-tags-add)
   )
 )
)
;;======================VTAGS======================

I'm not a elisp guru, as you see :). So, please help

Thanks.

-- 
Best regards,
Denis Golovan