#!/bin/sh

# The -3 option to wdiff gives no context, so I'm getting wdiff to spit out the
# whole document and using grep to trim it down. The regex for grep could be
# improved, but for text documents is probably ok, and at worst will include
# some extra output that can be ignored..
#
# Iain Murray, February 2009

if [ "$#" -lt 2 ] ; then
    echo 'Usage: cwdiff FILE1 FILE2'
    echo '       cwdiff [any options will be discarded] FILE1 FILE2'
    exit
fi

# Discard any options, for example SVN attempts to set a bunch of GNU diff
# options
shift $(($# - 2))

wdiff -n "$1" "$2" | grep -C2 '[{[][-+].*[-+][]}]' | colordiff