> I much prefer using spaces instead of tabs too. But since I noticed that
> preferable indentation in the Emacs source tree is with tabs I put into
> .emacs the following code:
> (defvar indent-tabs-mode-dirs (list (file-name-directory
> (directory-file-name data-directory)))
> "Set indent-tabs-mode in all files under specified subdirectories.")
This is wrong. For some file types indent-tabs-mode should always be
t (e.g. for ChangeLog and Makefile) and for others it should always be nil
(e.g. for LaTeX and TeXinfo).
How 'bout:
(add-hook 'find-file-hook
(lambda ()
(if (and (null indent-tabs-mode)
(local-variable-p 'indent-tabs-mode) ; Trust the major mode.
(save-excursion
(goto-char (point-min))
;; If there are at least 10 lines with a leading TAB, use TABs.
(re-search-forward "^ " (+ (point) 100000) t 10)))
(set (make-local-variable 'indent-tabs-mode) t))))
-- Stefan
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