Re: Using indent program as filter to automatically view read-only C files

[Kevin Rodgers <ihs_4664@yahoo.com>]

juanleon1@gmail.com wrote:
> I have to work with C/C++ files with a very ugly and inconsistent
> indentation (many developers adding things with no style guide). This
> is very distracting, and since I cannot change them (to avoid conflicts
> when taking/carryng changes from/to other branches), I had think that
> for read-only files (those that I have not opened in the revision
> control system), it would be nice if emacs could run automagically the
> "indent" program so I can see the code "beatyfully" indented.
> 
> I didn't find anything obvious on the net for that. I do not wanna
> modify files in disk, only to make emacs to put the indent output in
> the buffer without changing variables like `buffer-file-name' and so. I
> would like this to be done in a transparent way when opening a C/C++
> file (via find-file, find-tag or whatever).
> 
> Before trying to code something like that myself (and most probably
> reinvent the wheel), I would like to know if anybody knows if this (or
> something similar enough I could reuse/modify) is already available.
> 
> Any ideas welcome.

(add-hook 'find-file-hooks
           (lambda ()
             (when (and buffer-read-only
                        (memq major-mode '(c-mode c++-mode)))
               (let ((buffer-modified-p (buffer-modified-p))
                     (inhibit-read-only t))
                 (shell-command-on-region (point-min) (point-max) "indent"
                                          nil t nil)
                 (set-buffer-modified-p buffer-modified-p)
                 ;; (set-visited-file-modtime)
                 ))))

-- 
Kevin Rodgers