aaa.txt

;; git core.whitespace
(add-hook
 'c-mode-common-hook
 (lambda()
   (let (core-whitespace)

     (setq core-whitespace
           (shell-command-to-string
            (concat "git --exec-path="
                    (file-name-directory (buffer-file-name))
                    " config core.whitespace")))

     (print core-whitespace)

     (if (string-match "tab-in-indent" core-whitespace)
         (progn
           (setq indent-tabs-mode t)))
     (if (string-match "indent-with-non-tab" core-whitespace)
         (progn
           (setq indent-tabs-mode nil)))
     (if (string-match "tabwidth=\\([\\[0-9+\\]\\)" core-whitespace)
         (progn
           (setq tab-width (string-to-number
                            (match-string 1 core-whitespace)))
           (setq c-basic-offset tab-width)
           (setq c-tab-offset tab-width)
           ))
     )))