function unpack_file {

    case "$2" in
        "tar.gz")
            gzip -cd "$1" | tar xf -
            ;;

        "tgz")
            gzip -cd "$1" | tar xf -
            ;;

        "tar.bz2")
            bzip2 -cd "$1" | tar xf -
            ;;

        *)
            return 1
    esac

    return 0
}

function git_package {
    local DIR=$1
    local GIT=$2

    if [ -d "$DIR" ] ; then
        cd "$DIR"
        make clean
        git pull
        RETVAL=$? ; [ ! $RETVAL -eq 0 ] && return $RETVAL
        cd ..
    else
        git clone "$GIT"
        RETVAL=$? ; [ ! $RETVAL -eq 0 ] && return $RETVAL
    fi

    cd "$DIR"

    return 0;
}


function prep_package() {
    local NAME=$1
    local VER=$2
    local EXT=$3
    local WWW=$4
    local GLOB=$5

    if [ "x$GLOB" = "x" ]; then
        DIR="$NAME-$VER"
        FILE="$DIR.$EXT"
    else
        DIR="$GLOB"
        FILE="$GLOB.$EXT"
    fi

    # download file if it not exist
    if [ ! -f "$FILE" ] ; then
        wget -t 0 "$WWW/$FILE"
        RETVAL=$? ; [ ! $RETVAL -eq 0 ] && return $RETVAL
    fi

    # unpack if not unpacked
    if [ ! -d "$DIR" ] ; then
        unpack_file "$FILE" "$EXT"

        # rename folder that cames without version
        if [ ! -d "$DIR" ] ; then
            mv -f "$NAME" "$DIR"
        fi
    else
        cd $DIR
        make clean
        cd ..
    fi

    cd "$DIR"

    return 0
}

function make_package() {
    make
    RETVAL=$? ; [ ! $RETVAL -eq 0 ] && return $RETVAL

    make install
    RETVAL=$? ; [ ! $RETVAL -eq 0 ] && return $RETVAL

    cd ..

    return 0
}