#!/bin/sh

usage()
{
        echo "usage: $0 [-h] [-C] [<dependency 1>] [<dependency 2>] ..."
        echo "       -h      Displays this usage"
        echo "       -C      Clobbers (overwrites) the source code by "
        echo "               reextracting the archive and reapplying any"
        echo "               patches."
        echo ""
        echo "<dependency N> Optional dependency, If none are given then all"
        echo "               of them will be built."
        echo ""
        echo "Valid dependencies are:"
        grep -v '^#' < External-depkgs | cut -d'|' -f1 | cut -d'_' -f1 | tr A-Z a-z | sort -u | awk '{ print "        " $1 }'
}

CLOBBER_SOURCE=

while getopts "hHC" opt; do
        case ${opt} in
        H|h|\?) usage;exit 1;;
        C)      CLOBBER_SOURCE=true;;
        esac
done

[ ${OPTIND} -gt 1 ] && shift `expr ${OPTIND} - 1`

cwd=`pwd`
cd `dirname $0`
SCRIPT_DIR=`pwd`
TOP_DIR=`pwd`
DEPPKG_DIR=`pwd`

export PATH=${BIN_DIR}:${PATH}

OLD_IFS=${IFS};IFS="|";
while read package url dir mkd; do
        case ${package} in
        \#*) ;;
        *) eval "URL_${package}=${url};DIR_${package}=${dir};MKD_${package}=${mkd}";;
        esac
done < ${SCRIPT_DIR}/External-depkgs
IFS=${OLD_IFS};unset OLD_IFS

get_source()
{
        URL=$1
        SRC_DIR=$2
        MAKE_DIR=$3
        ARCHIVE=`basename ${URL}`

        case ${ARCHIVE} in
        *.tar.gz)       ARCHIVER="tar xzf"; [ -z "${SRC_DIR}" ] && SRC_DIR=`expr "${ARCHIVE}" : '\(.*\)\.tar\.gz'`;;
        *.tar.bz2)      ARCHIVER="tar xjf"; [ -z "${SRC_DIR}" ] && SRC_DIR=`expr "${ARCHIVE}" : '\(.*\)\.tar\.bz2'`;;
        *.zip)          ARCHIVER="unzip -q";   [ -z "${SRC_DIR}" ] && SRC_DIR=`expr "${ARCHIVE}" : '\(.*\)\.zip'`;;
        *)              echo Unsupported archive type - $ARCHIVE; exit 1;;
        esac
        
        if [ ! -e "${ARCHIVE}" ]
        then 
                echo Downloading "${URL}"
                if wget --passive-ftp "${URL}"
                then
                        :
                else
                        echo Unable to download ${ARCHIVE}
                        exit 1
                fi
        fi

        if [ ! -e "${SRC_DIR}" -o "${CLOBBER_SOURCE}" = "true" ]
        then
                rm -rf ${SRC_DIR}
                [ "${MAKE_DIR}" = "true" ] && mkdir ${SRC_DIR} && cd ${SRC_DIR}
                echo Extracting ${ARCHIVE}
                ${ARCHIVER} ${ARCHIVE} &> ${ARCHIVE}.log
                cd ${SRC_DIR}
                return 0
        fi

        cd ${SRC_DIR}
        return 1
}


process_mkcdrec()
{
        if get_source "${URL_MKCDREC}" "${DIR_MKCDREC}" "${MKD_MKCDREC}"
        then
           echo "Have mkcdrec source"
        fi
}


if [ "$#" -eq 0 ]
then
        process_mkcdrec
else
        for dependency in "$@"
        do
           eval "process_${dependency}"
        done

fi