#!/bin/sh

MP=$1
DP=$2
CMDFILE=$(mktemp /tmp/cmdfile.XXXXXXXXX)
CMD_TEMPDIR=$(mktemp -d /tmp/cmddir.XXXXXXX)

[ ! -d "${MP}" ] && exit 1
[ ! -d "${DP}" ] && exit 1

n=0

echo "Generating command file ${CMDFILE}"

/usr/bin/find -s ${MP}/[a-z]* -type d -depth 1 -maxdepth 1 | \
    while read port
    do
        cd ${port}
        # display counter only in a terminal, not in redirections
        [ -t 1 ] && printf  "\r%d" ${n}
        n=$(( n + 1 ))
        echo "'/usr/bin/make -C ${port} PORTSDIR=${DP} PORT_DBDIR=/tmp describe >${CMD_TEMPDIR}/$(basename ${port}).log'" >> ${CMDFILE}
    done

echo " done"

echo -n "Running commands via xargs. "
mkdir -p ${CMD_TEMPDIR}
cat ${CMDFILE} | xargs -P 24 -L 1 sh -c
echo "done"

echo -n "Collecting INDEX information. "
find ${CMD_TEMPDIR} -iname "*.log" -type f | xargs cat > /tmp/INDEX
/bin/mv /tmp/INDEX ${MP}/INDEX-3
echo "done"

echo -n "Cleaning up. "
rm ${CMDFILE}
rm -fr ${CMD_TEMPDIR}
echo "done"