FROM ubuntu as builder
ARG TARGETARCH
# Download rootfs
RUN apt-get update -y && apt-get upgrade -y && apt-get install -y wget xz-utils
RUN mkdir /os && wget -O - "https://navos.hydrar.de/rootfs/${TARGETARCH}/rootfs.tar.xz" | tar --numeric-owner --xattrs --acls -xvJf - -C /os

# Copy
FROM scratch
COPY --from=builder /os/ /

# Update & remove local keyring
RUN ["/usr/bin/ldconfig"]
RUN ["/bin/sh", "-c", "pacman -Syu --noconfirm && rm -r /etc/pacman.d/gnupg/"]

CMD ["/bin/sh"]