Dockerfile

FROM alpine:edge

MAINTAINER API Hackers

# Add Edge and bleeding repos
RUN echo -e '@edge http://dl-cdn.alpinelinux.org/alpine/edge/main' >> /etc/apk/repositories \
    && echo -e '@testing http://dl-cdn.alpinelinux.org/alpine/edge/testing' >> /etc/apk/repositories

# Install permanent system depdencies
RUN apk add --update --no-cache \
    bash \
    ca-certificates \
    gettext \
    gsl \
    gzip \
    imagemagick \
    libavc1394 \
    libdc1394 \
    libjpeg \
    libpng \
    libpq \
    libtbb@testing \
    libwebp \
    python3 \
    tiff \
    yaml \
    python3-dev \
    build-base \
    libjpeg-turbo-dev \
    libpng-dev \
    tiff-dev \
    libwebp-dev \
    imagemagick-dev \
    zlib-dev \
    postgresql-dev \
    zlib &&\
    python3 -m ensurepip && \
    rm -r /usr/lib/python*/ensurepip && \
    pip3 install --upgrade pip setuptools && \
    rm -r /root/.cache

# Define some versions
ENV OPENCV_VERSION 3.3.0
ENV WAGTAIL_VERSION 1.12.2
ENV DJANGO_VERSION 1.11.6

# Define compilers
ENV CC /usr/bin/clang
ENV CXX /usr/bin/clang++

# Alpine store some headers into /lib/
ENV LIBRARY_PATH=/lib:/usr/lib

# Compile and install OpenCV for Python 3 and wagtail
# Temporary install build dependencies
RUN apk add --no-cache --virtual .build-deps@testing  \
        curl \
        cmake \
        pkgconf \
        unzip \
        libavc1394-dev \
        libdc1394-dev \
        clang \
        clang-dev \
        libtbb@testing \
        libtbb-dev@testing \
        linux-headers \
    # Fix numpy compilation
    && ln -s /usr/include/locale.h /usr/include/xlocale.h \
    # Enable some numpy optimization
    && pip3 install cython \
    && pip3 install numpy \
    # Build OpenCV
    && mkdir /opt && cd /opt \
    && curl -OsSL https://github.com/Itseez/opencv/archive/${OPENCV_VERSION}.zip \
    && unzip ${OPENCV_VERSION}.zip \
    && cd /opt/opencv-${OPENCV_VERSION} \
    && mkdir build && cd build \
    && cmake -D CMAKE_BUILD_TYPE=RELEASE \
        -D CMAKE_INSTALL_PREFIX=/usr/local \
        # Gain some space and time by disabling some features
        -D INSTALL_C_EXAMPLES=OFF \
    	-D INSTALL_PYTHON_EXAMPLES=OFF \
    	-D BUILD_EXAMPLES=OFF \
        -D WITH_FFMPEG=NO \
        -D WITH_IPP=NO \
        -D WITH_OPENEXR=NO \
        .. \
    && VERBOSE=1 make && make install \
    && cd && rm -fr /opt \
    # Install Wagtail and some depdencies
    && pip3 install django==$DJANGO_VERSION wagtail==$WAGTAIL_VERSION django-redis psycopg2 wand \
    # Cleanup
    && apk del .build-deps && rm -r /root/.cache