# syntax=docker/dockerfile:1

# Debian build environment for Linux on ARM64 (aarch64-linux-gnu), producing an
# arm64 .deb. Cross-compiled from amd64 with Debian's clang-19 + libc++-19 and
# the arm64 packages installed via dpkg multiarch.

FROM debian:stable AS dev

ENV DEBIAN_FRONTEND=noninteractive

ARG APT_MIRROR=""
RUN if [ -n "$APT_MIRROR" ]; then \
        sed -i -e "s|http://deb.debian.org/debian|${APT_MIRROR}|g" \
               -e "s|http://security.debian.org/debian-security|${APT_MIRROR}|g" \
               /etc/apt/sources.list /etc/apt/sources.list.d/*.sources 2>/dev/null || true; \
    fi

RUN dpkg --add-architecture arm64

RUN --mount=type=cache,target=/var/lib/apt,sharing=locked \
    --mount=type=cache,target=/var/cache/apt,sharing=locked \
    for attempt in 1 2 3 4 5; do \
        apt-get -o Acquire::Retries=5 update && break; \
        echo "apt-get update failed (attempt $attempt), retrying"; \
        sleep 5; \
    done \
    && apt-get -o Acquire::Retries=5 install -y --no-install-recommends \
        ca-certificates \
        clang-19 \
        clang-tools-19 \
        curl \
        dpkg-dev \
        file \
        gcc-aarch64-linux-gnu \
        libc++-19-dev:arm64 \
        libc++abi-19-dev:arm64 \
        libsdl3-dev:arm64 \
        libunwind-19-dev:arm64 \
        lld-19 \
        ninja-build \
        pkg-config \
        python3 \
    && rm -rf /var/lib/apt/lists/*

ARG CMAKE_VERSION=4.2.3
RUN mkdir -p /opt/cmake \
    && curl -fL "https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/cmake-${CMAKE_VERSION}-linux-x86_64.tar.gz" \
        | tar -xz -C /opt/cmake --strip-components=1
ENV PATH="/opt/cmake/bin:${PATH}"

ENV CC=clang-19
ENV CXX=clang++-19
# Point pkg-config at the arm64 packages so SDL3 resolves to the aarch64 build.
ENV PKG_CONFIG_LIBDIR=/usr/lib/aarch64-linux-gnu/pkgconfig

WORKDIR /work
COPY . .

RUN cmake -S . -B build/debian-arm64 -G Ninja \
        -DCMAKE_TOOLCHAIN_FILE=cmake/toolchains/clang-aarch64-linux-gnu.cmake \
        -DCMAKE_BUILD_TYPE=Release \
        -DOPENRA3_AARCH64_CC=clang-19 \
        -DOPENRA3_AARCH64_CXX=clang++-19 \
        -DOPENRA3_AARCH64_STDLIB_MODULES_JSON=/usr/lib/llvm-19/lib/libc++.modules.json \
        -DOPENRA3_DISTRO_TAG=debian13 \
    && cmake --build build/debian-arm64 -j \
    && (cd build/debian-arm64 && cpack -G DEB)

FROM --platform=linux/arm64 debian:stable AS deploy

ENV DEBIAN_FRONTEND=noninteractive

RUN --mount=type=cache,target=/var/lib/apt,sharing=locked \
    --mount=type=cache,target=/var/cache/apt,sharing=locked \
    apt-get -o Acquire::Retries=5 update \
    &&     apt-get -o Acquire::Retries=5 install -y --no-install-recommends \
        libc++1-19 \
        libc++abi1-19 \
        libsdl3-0 \
        libvulkan1 \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app
COPY --from=dev /work/build/debian-arm64/bin/openra3 /app/openra3

ENTRYPOINT ["/app/openra3"]