#!/bin/sh
#
# diffingly - apply a filter to a file and diff the result
#
# $Id$

# remove initial options so as to pass them to diff
opts=
for arg in "$@"
do
  case "$1" in
  -*) opts="$opts $1"; shift;;
  *) break;;
  esac
done

# take the last argument as the file to diff against
for lastarg in "$@"
do
  :
done

exec "$@" | diff $opts "$lastarg" -