# PK_VERSION
# PK_DIRNAME

pkunpack() {
    if ! (copy "$DOWNLOAD_PACKET_DIR" "$UNPACK_PACKET_DIR" \
     && rm -f -r "$UNPACK_PACKET_DIR/$PK_DIRNAME/.git"); then
        return 1
    fi

    if [ -z "$PK_VERSION" ]; then
        PK_VERSION="$(pkhook_version)"
        [ $? -eq 0 ] || return 1
    fi
    cd "$DOWNLOAD_PACKET_DIR/$PK_DIRNAME"
    local COMMIT=`git rev-parse HEAD`
    [ $? -eq 0 ] || return 1
    echo "$PK_VERSION-$COMMIT" > "$UNPACK_PACKET_DIR/version-$NAME"
    [ $? -eq 0 ] || return 1
   	return 0
}