# Minimal multi-stage Dockerfile for FreeRTOS repository
# Stage 1: builder (install toolchain and prepare sources)
FROM ubuntu:22.04 AS builder
ENV DEBIAN_FRONTEND=noninteractive

RUN apt-get update && \
    apt-get install -y --no-install-recommends \
        build-essential \
        ca-certificates \
        git \
        wget \
        python3 \
        python3-pip \
        pkg-config \
        gcc-arm-none-eabi \
        binutils-arm-none-eabi \
        make && \
    rm -rf /var/lib/apt/lists/*

WORKDIR /workspace
COPY . /workspace

# Attempt a light build if a known demo exists; otherwise skip
RUN if [ -d FreeRTOS/Demo/ARM7_AT91FR40008_GCC ]; then \
        echo "Attempting light build of ARM7_AT91FR40008_GCC..."; \
        (cd FreeRTOS/Demo/ARM7_AT91FR40008_GCC && make -j$(nproc) 2>&1 | head -n 20) || true; \
    else \
        echo "No known demo found for light build; skipping..."; \
    fi

# Stage 2: runtime image
FROM ubuntu:22.04

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

COPY --from=builder /workspace /workspace

WORKDIR /workspace

CMD ["bash"]