# Minimal cross-build of shairport-sync with the OHM Songcast sender backend,
# for linux/arm64 (Raspberry Pi OS aarch64). Produces a glibc binary compatible
# with Debian bullseye (glibc 2.31) and later (e.g. bookworm).
#
# Usage from the repo root:
#   docker buildx build --platform linux/arm64 --target binary \
#     -f docker/Dockerfile.ohm --output type=local,dest=./out-ohm .
#
# Then copy ./out-ohm/shairport-sync to the Pi.
#
# FFmpeg is taken from Debian packages (libavcodec-dev etc.) rather than built
# from source, to keep the cross-build fast under emulation.

ARG DEBIAN_VERSION=bullseye

FROM --platform=linux/arm64 debian:${DEBIAN_VERSION} AS builder

ENV DEBIAN_FRONTEND=noninteractive

RUN apt-get update && apt-get install -y --no-install-recommends \
        build-essential \
        autoconf \
        automake \
        libtool \
        pkg-config \
        git \
        ca-certificates \
        xxd \
        libasound2-dev \
        libplist-dev \
        libplist-utils \
        libssl-dev \
        libsodium-dev \
        libgcrypt-dev \
        uuid-dev \
        libavcodec-dev \
        libavformat-dev \
        libswresample-dev \
        libavutil-dev \
        libavahi-client-dev \
        avahi-daemon \
        libdbus-1-dev \
        libglib2.0-dev \
        libconfig-dev \
        libpopt-dev \
        libsndfile-dev \
        libsoxr-dev \
        xmltoman \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /shairport-sync
COPY . .

WORKDIR /shairport-sync/build
RUN autoreconf -i ../
RUN ../configure --sysconfdir=/etc --with-alsa \
        --with-avahi --with-ssl=openssl \
        --with-airplay-2 --with-ffmpeg --with-metadata \
        --with-ohm --with-dummy --with-pipe --with-stdout \
        --with-dbus-interface --with-mpris-interface \
        --with-convolution --with-soxr
RUN make -j"$(nproc)"

# Target that yields just the binary on the host filesystem via --output.
FROM --platform=linux/arm64 scratch AS binary
COPY --from=builder /shairport-sync/build/shairport-sync /shairport-sync