emacs-indent-erlang

;;; File: emacs-indent-erlang
;;; adapted from http://www.cslab.pepperdine.edu/warford/BatchIndentationEmacs.html

;; this has to be set to the real path on your system
(add-to-list 'load-path "~/.emacs.d/elpa/erlang-20131025.6") 
(load-library "erlang")

;; comment out the call to untabify if you want the mixed tabs and spaces

(defun emacs-indent-function ()
   "Format the whole buffer."
   (erlang-mode)
   (indent-region (point-min) (point-max) nil)
   (untabify (point-min) (point-max))
   (save-buffer)
)

erl-indent

#!/bin/sh
# File: erl-indent
# Opens a set of files in emacs and executes the emacs-indent-function.
# Assumes the function named emacs-indent-function is defined in the
# file named emacs-indent-file.
#
# adapted from http://www.cslab.pepperdine.edu/warford/BatchIndentationEmacs.html

if [ $# -eq 0 ]
then
   echo "erl-indent requires at least one argument." 1>&2
   echo "Usage: erl-indent files-to-indent" 1>&2
   exit 1
fi
while [ $# -ge 1 ]
do
   if [ -d $1 ]
   then
      echo "Argument of erl-indent $1 cannot be a directory." 1>&2
      exit 1
   fi
   # Check for existence of file:
   ls $1 2> /dev/null | grep $1 > /dev/null
   if [ $? != 0 ]
   then
      echo "erl-indent: $1 not found." 1>&2
      exit 1
   fi
   echo "Indenting $1 with emacs in batch mode..."
   emacs -batch $1 -l ~/bin/emacs-indent-erlang -f emacs-indent-function
   echo
   shift 1
done
exit 0