#!/bin/sh

# attempt to identify images that are not used
# this is a helper script for the Battle for Wesnoth project
# see http://www.wesnoth.org/
# this script is distributed on the same terms as Battle for Wesnoth itself

# note that many images (eg. for terrains) are actually referenced,
# but the image filename is constructed programmatically so it's not
# easy to auto-detect these

TM=tmp-all.$$
TMU=tmp-used.$$
find images -name '*.png' -print | sort -u | sed -e 's/^images\///' > $TM

fgrep -r .png data | sed -e 's/.* \([^ ]*\.png\)/\1/' -e 's/.*=\([^ ]*\.png\)/\1/' -e 's/(\([^)]*\))/\1/' -e 's/\"\(.*\)\"/\1/' -e 's/\.png .*/.png/' -e 's/\.png\".*/.png/' -e 's/\"//' -e 's/[ 	]*//g' -e 's/:[0-9]*//g' -e 's/,$//' -e 's/,/ /g' | perl -p -e 's/ /\n/g' | sort -u > $TMU

diff -u0 $TMU $TM | grep -v '^@@'

rm -f $TM $TMU