#!/bin/sh

if ! [ -f ai/regression/main.nut ]; then
	echo "Make sure you are in the root of OpenTTD before starting this script."
	exit 1
fi

if [ -n "`cat ai/regression/main.nut | grep '//iFRegression <-FRegression();'`" ]; then
	echo "Enable the Regression AI before starting the regression test."
	echo "Also disable any other AI. Check main.nut in ai/regression for"
	echo "more information about this."
	exit 1
fi

./openttd -snull -mnull -vnull -g ai/regression/regression.sav > tmp.regression
res="`diff -u ai/regression/regression.txt tmp.regression`"
if [ -z "$res" ]; then
	echo "Regression test passed!"
else
	echo "Regression test failed! Difference:"
	echo "$res"
fi
echo ""
echo "Regression test done"

rm -f tmp.regression