#!/bin/sh

PDATE=.pkg_info_2010-12-03
_pdiff(){
    PD=/data/packages
    D1=${PD}/${PDATE}
    D2=${PD}/ppp
    [ ! -d ${PD} ] && echo " dir ${PD} does not exist"  && return 1
    [ ! -f ${D1} ] && echo " file ${D1} does not exist" && return 1
    cd ${PD}/
    pkg_info -qoa | sort > ${D2}
    cmp -s ${D1} ${D2} > /dev/null
    _ret=$?
    if [ $_ret -eq 1 ]; then
        diff -U 0 ${D1} ${D2} | grep -v ^@ | less
    else
        echo "no missing packages"
    fi
}

_pdiff2(){
    PD=/data/packages
    D1=${PD}/${PDATE}
    D2=${PD}/ppp
    TMP2=${PD}/.tmpppp
    [ ! -d ${PD} ] && echo " dir ${PD} does not exist"  && return 1
    [ ! -f ${D1} ] && echo " file ${D1} does not exist" && return 1
    cd ${PD}/
    pkg_info -qoa | sort > ${D2}
    cmp -s ${D1} ${D2} > /dev/null
    _ret=$?
    if [ $_ret -eq 1 ]; then
        diff -u ${D1} ${D2} | grep "^-[a-z]" | sed -e 's/^\-//g'| awk '{printf "addPort /usr/ports/%s\n", $1}' > ${TMP2}
        diff -u ${D1} ${D2} | grep "^+[a-z]" >> ${TMP2}
        less ${TMP2} && rm ${TMP2}
    else
        echo "no missing packages"
    fi
}

echo $#
if [ $# -eq 0 ]; then
    _pdiff
else
    _pdiff2
fi