Dockerfile.base

ARG UBUNTU_RELEASE=22.04

# Build the chiselled filesystem based on the desired slices.
FROM --platform=$BUILDPLATFORM ubuntu:$UBUNTU_RELEASE AS builder
ARG UBUNTU_RELEASE
ARG TARGETARCH

# Get chisel binary
ADD "https://github.com/canonical/chisel/releases/download/v0.9.0/chisel_v0.9.0_linux_${TARGETARCH}.tar.gz" chisel.tar.gz
RUN tar -xvf chisel.tar.gz -C /usr/bin/
RUN apt-get update \
   && DEBIAN_FRONTEND=noninteractive apt-get install -y ca-certificates

WORKDIR /rootfs
RUN chisel cut --release ubuntu-$UBUNTU_RELEASE --root /rootfs \
   base-files_base \
   base-files_release-info \
   ca-certificates_data \
   libc6_libs

# Make the chiselled filesystem the only thing
# present in the final image.
FROM scratch
COPY --from=builder /rootfs /

# Build base chiselled image
# docker buildx build -f Dockerfile.base --platform linux/arm64,linux/amd64 --tag akoken/chiselled-ubuntu:latest . --load