# Usage:
# docker buildx build \
#   -o /tmp/fuse-overlayfs-builds \
#   --build-arg SOURCE_DATE_EPOCH=$(git log -1 --pretty=%ct) \
#   --platform=amd64,arm64,arm,s390x,ppc64le,riscv64 \
#   -f Containerfile.cross .
FROM --platform=$BUILDPLATFORM tonistiigi/xx:1.2.1 AS xx
FROM --platform=$BUILDPLATFORM ubuntu:jammy-20230804 AS fuse-overlayfs
ADD --chmod=0755 \
  https://raw.githubusercontent.com/reproducible-containers/repro-sources-list.sh/v0.1.0/repro-sources-list.sh \
  /usr/local/bin/repro-sources-list.sh
RUN \
  --mount=type=cache,target=/var/cache/apt,sharing=locked \
  --mount=type=cache,target=/var/lib/apt,sharing=locked \
  repro-sources-list.sh && \
  apt-get update && \
  apt-get install --no-install-recommends -y \
  git make automake autoconf pkgconf file go-md2man
# Set SOURCE_DATE_EPOCH after running repro-sources-list.sh, for cache efficiency
ARG SOURCE_DATE_EPOCH
COPY . /fuse-overlayfs
WORKDIR /fuse-overlayfs
COPY --from=xx / /
ARG TARGETPLATFORM
ENV DEBIAN_FRONTEND=noninteractive
# xx-apt-get cannot be used, as it clobbers /etc/apt/sources.list created by repro-sources-list.sh
RUN \
  --mount=type=cache,target=/var/cache/apt,sharing=locked \
  --mount=type=cache,target=/var/lib/apt,sharing=locked \
  darch="$(xx-info debian-arch)" && \
  dpkg --add-architecture ${darch} && \
  apt-get update && \
  gcc="gcc" && \
  if xx-info is-cross; then gcc="gcc-$(xx-info triple)"; fi; \
  apt-get install -y "${gcc}" "libfuse3-dev:${darch}"
RUN ./autogen.sh && \
  LIBS="-ldl" LDFLAGS="-static" ./configure --host=$(xx-info) && \
  make && mkdir /out && cp fuse-overlayfs /out && \
  file /out/fuse-overlayfs | grep "statically linked"

FROM scratch
COPY --from=fuse-overlayfs /out/fuse-overlayfs /fuse-overlayfs