FROM ubuntu:jammy-20260210.1

# Non-interactive installs
ENV DEBIAN_FRONTEND=noninteractive

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

# Build from source
WORKDIR /opencv
COPY . /opencv

# Configure minimal build to avoid heavy external dependencies
RUN cmake -S . -B build \
    -DCMAKE_BUILD_TYPE=Release \
    -DBUILD_EXAMPLES=OFF \
    -DBUILD_TESTS=OFF \
    -DBUILD_PERF_TESTS=OFF \
    -DBUILD_DOCS=OFF \
    -DWITH_GSTREAMER=OFF \
    -DWITH_JPEG=OFF \
    -DWITH_PNG=OFF \
    -DWITH_TIFF=OFF \
    -DWITH_OPENGL=OFF \
    -DWITH_V4L=OFF

# Build and install
RUN cmake --build build -j$(nproc) \
    && cmake --install build --prefix /usr/local

# Path and pkg-config setup
ENV PATH=/usr/local/bin:$PATH
RUN mkdir -p /usr/local/lib/pkgconfig && printf "prefix=/usr/local\nexec_prefix=${prefix}\nlibdir=${prefix}/lib\nincludedir=${prefix}/include/opencv4\nName: OpenCV\nDescription: OpenCV library\nVersion: 4.x\nRequires:\nLibs: -L${libdir} -lopencv_core -lopencv_imgcodecs -lopencv_imgproc -lopencv_highgui -lopencv_videoio\nCflags: -I${includedir}\n" > /usr/local/lib/pkgconfig/opencv4.pc || true

CMD ["bash"]