#/bin/sh

BINDIR=../pegasus/bin/

tokenfile=$1
TMPERRORFILE="/tmp/TMPERRORFILE$$"

on_error()
{
	if [ $? -ne 0 ]; then
		err=$1
		echo $err
		cat ${TMPERRORFILE}
		rm ${TMPERRORFILE}
		exit 1
	fi
	val=`wc -l ${TMPERRORFILE} | cut -d ' ' -f 1`
	if [ ${val} -ne 0 ]; then
		echo $err
		cat ${TMPERRORFILE}
		rm ${TMPERRORFILE}
		exit 1
	fi
}

if [ $# -eq 0 ]
then
	echo "usage $0 token-and-rules-file"
	exit 1
fi

echo "pegasus reading the grammar"
${BINDIR}/pegasus < "${tokenfile}" > "${tokenfile}.json" 2>${TMPERRORFILE}
on_error "cannot read the grammar"

echo "pegasus trying an example on the generated parser"
cat "${tokenfile}.example" | ${BINDIR}/pegasus-sim -i "${tokenfile}.json"
# echo VAL RET $?
on_error "cannot parse the example"

echo "pegasus creating a dot file"
${BINDIR}/pegasus-dot < "${tokenfile}.json" > "${tokenfile}.dot"
# echo VAL RET $?
on_error "cannot create the dot file"