#! /bin/bash
#
# cachepacs -  install pkgs to cache dir, but don't isntall
#
# Author: James Meyer  (based on inpacs)


# Working directory:
TMPDIR=/tmp/inpacs$$
# File containing (filtered) list of base packages + added packages
basepacks=${TMPDIR}/basepacks

APP="$( basename $0 )"

exitfunc () {
    # Remove temporary files
    rm -rf ${TMPDIR}
    exit $1
}

# Default pacman db path (this is a statement, not a configuration, so
# do not change it!)
DBPATH="/var/lib/pacman"

# Default package cache, on the target
TARGETCACHE="${CACHE}"
# A host or remote package cache:
HOSTCACHE=""
# Absolute /path/to/file containing list of packages for 2nd install phase:
ADDEDPACKS=""
# Source file for base package list:
BASEPACKSFILE=""
# Source file for list of vetoed base packages:
VETOFILE=""
# Source directory for pacman database directories:
DBDIR=""
# pacman executable:
PACMANX="pacman -f"
# pacman configuration file
PACMANK="/etc/pacman.conf"

checkfile ()
{
    f=$( readlink -m $1 )
    if ! [ -f "${f}" ]; then
        echo "ERROR: File doesn't exist: ${f}"
        exitfunc
    fi
}

checkdir ()
{
    f=$( readlink -m $1 )
    if ! [ -d "${f}" ]; then
        echo "ERROR: Directory doesn't exist: ${f}"
        exitfunc
    fi
}


while getopts ":k:a:c:b:x:y:P:" Option
do
  case ${Option} in
    k ) checkfile ${OPTARG}
        PACMANK=${f} ;;
    a ) checkfile ${OPTARG}
        CACHEPACKSFILE=${f} ;;
    y ) checkdir ${OPTARG}
        DBDIR=${f} ;;
    P ) checkfile ${OPTARG}
        PACMANX=${f} ;;
    #* ) usage ;;
  esac
done
shift $((${OPTIND} - 1))
INSTLDIR="$1"


# grep the cachedir out of the installed pacman.conf
PCCACHE=`grep CacheDir $INSTLDIR/etc/pacman.conf|cut -d= -f2|cut -d\/ -f2-`
CACHEDIR=${INSTLDIR}/$PCCACHE

echo "INSTLDIR=${INSTLDIR}"
echo "PACMANK=${PACMANK}"
echo "CACHEDIR=${CACHEDIR}"
echo "DBDIR=${DBDIR}"
echo "PACMANX=${PACMANX}"
echo


# test if the script is started by root user. If not, exit
if [ $UID -ne 0 ]; then
    echo "Only root can run ${APP}"; exitfunc 1
fi

echo "//"
echo "// downloading  packages to  ${CACHEDIR}"

PACMAN="${PACMANX} --config ${PACMANK} --noconfirm"

rm -rf ${TMPDIR}
mkdir -p ${TMPDIR}

# Helper function for installing a list of packages
doInstall() {
    mkdir -p ${INSTLDIR}/sys
    mkdir -p ${INSTLDIR}/proc
    mount --bind /sys ${INSTLDIR}/sys
    mount --bind /proc ${INSTLDIR}/proc
     ${PACMAN} -r ${INSTLDIR} -Sw  $1
     RET=$?
     echo $RET
    umount ${INSTLDIR}/proc
    umount ${INSTLDIR}/sys
    if [ ${RET} -ne 0 ]; then
        echo "//"
        echo "// cachepacks package $1 FAILED."
        echo "//"
        return 1
    fi
}


PACMAN="${PACMAN} --cachedir $CACHEDIR"

########## GET LIST OF CACHE PACKAGES
echo "//"
echo "// ** Getting cache package list ..."
if [ -n "${CACHEPACKSFILE}" ]; then
    echo "//    from: ${CACHEPACKSFILE}"
    CACHEPKGS=$( cat ${CACHEPACKSFILE} | grep -v "#" )
else
    echo " no cache package file found"
    exit 0
fi


doInstall "${CACHEPKGS}"
if [ $? -ne 0 ]; then exitfunc 1; fi
exitfunc