.dir-locals.el

;; Per-directory local variables for GNU Emacs
;;  https://www.gnu.org/software/emacs/manual/html_node/emacs/Directory-Variables.html
;;
((nil . ((indent-tabs-mode . nil)
         (show-trailing-whitespace . t)))
 (shell-script-mode . ((sh-basic-offset . 4)))
 (c-mode . ((c-basic-offset . 4)))
 (c++-mode . ((c-basic-offset . 4)))
 (makefile-mode . ((indent-tabs-mode t)))
 )