# ab_server container for the AB CIP integration suite.
#
# ab_server is a C program in libplctag/libplctag under src/tools/ab_server.
# We clone at a pinned commit, build just the ab_server target via CMake,
# and copy the resulting binary into a slim runtime stage so the published
# image stays small (~60MB vs ~350MB for the build stage).

# -------- stage 1: build ab_server from source --------
FROM debian:bookworm-slim AS build

RUN apt-get update && apt-get install -y --no-install-recommends \
        git \
        build-essential \
        cmake \
        ca-certificates \
    && rm -rf /var/lib/apt/lists/*

# A concrete tag, not a branch. This said "pinned" while cloning `release`,
# which moves — so two builds of the same Dockerfile could produce different
# servers, and the patch below could not be relied on to apply. Bump
# deliberately alongside a driver-side change that needs something newer, and
# re-check the patch against the new tag.
ARG LIBPLCTAG_TAG=v2.7.0
RUN git clone --depth 1 --branch "${LIBPLCTAG_TAG}" https://github.com/libplctag/libplctag.git /src

# Upstream ab_server answers CIP service 0x55 (Get Instance Attribute List) with
# "unsupported", so a controller-tag browse against it returns nothing. The
# patch implements the Symbol Object listing that a real Logix controller
# serves, which is what the AbCip driver's `@tags` walk reads. Verified against
# libplctag's own `list_tags_logix` client — see README.md.
COPY patches/ /patches/
WORKDIR /src
RUN git apply --verbose /patches/*.patch

RUN cmake -S . -B build -DCMAKE_BUILD_TYPE=Release \
 && cmake --build build --target ab_server --parallel

# -------- stage 2: runtime --------
FROM debian:bookworm-slim

LABEL org.opencontainers.image.source="https://github.com/dohertj2/lmxopcua" \
      org.opencontainers.image.description="libplctag ab_server for OtOpcUa AB CIP driver integration tests"

# libplctag's ab_server is statically linked against libc / libstdc++ on
# Debian bookworm; no runtime dependencies beyond what the slim image
# already has.
COPY --from=build /src/build/bin_dist/ab_server /usr/local/bin/ab_server

EXPOSE 44818

# docker-compose.yml overrides the command with per-family flags.
CMD ["ab_server", "--plc=ControlLogix", "--path=1,0", "--port=44818", \
     "--tag=TestDINT:DINT[1]", "--tag=TestREAL:REAL[1]", "--tag=TestBOOL:BOOL[1]"]