function locate_source {
    tarball=$( ls *.tar.* | wc -l )
        if [ $tarball -gt "1" ]; then
            echo "More than one tarball here"
            exit
            else
            found=$( ls *.tar.* )
            echo "I found the following sources:"
            echo " "
            echo ${found/%-[0-9]*/}
            $APP=$found
            echo " "
            fi
         }