#!/bin/bash

if [ $# -eq 0 ]
then
    files=`ls ./*.y`
else
    files="$*"
fi

pngs=""

for file in $files
do
    base=${file%.y}
    png=${base}.png
    pngs="$pngs $png"
    echo "yacc -v \"$file\" && cat y.output | yacc2dot | dot -Tpng > \"$png\""
    yacc -v "$file" && \
        cat y.output | \
	    yacc2dot | \
	    dot -Tpng > "$png"
    if [ $? -ne 0 ]
    then
	exit 1
    fi
    output=${base}.output
    mv y.output "$output"
done

qiv $pngs &