##################
### Build CKAN ###
##################
FROM alpine:3.13.7 as ckanbuild

# Used by Github Actions to tag the image with
ENV IMAGE_TAG=2.9.11

# Set CKAN version to build
ENV GIT_URL=https://github.com/ckan/ckan.git
ENV GIT_BRANCH=ckan-2.9.11

# Set src dirs
ENV SRC_DIR=/srv/app/src
ENV PIP_SRC=${SRC_DIR}

WORKDIR ${SRC_DIR}

# Packages to build CKAN requirements and plugins
RUN apk add --no-cache \
    python3 \
    python3-dev \
    git \
    curl \
    postgresql-dev \
    linux-headers \
    gcc \
    make \
    g++ \
    autoconf \
    automake \
    libtool \
    patch \
    musl-dev \
    pcre-dev \
    pcre \
    libffi-dev \
    libxml2-dev \
    libxslt-dev

# Link python to python3
RUN ln -s /usr/bin/python3 /usr/bin/python

# Create the src directory
RUN mkdir -p ${SRC_DIR}

# Install pip
RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/get-pip.py && \
    python ${SRC_DIR}/get-pip.py

# Downgrade setuptools so that CKAN requirements can be built
RUN pip install setuptools==44.1.0

# Fetch and build CKAN and requirements
RUN pip install -e git+${GIT_URL}@${GIT_BRANCH}#egg=ckan
# Copy patches and apply patches script
COPY ./patches ${SRC_DIR}/patches
COPY ./scripts/apply_ckan_patches.sh ${SRC_DIR}/apply_ckan_patches.sh
# Apply patches
RUN cd ${SRC_DIR} && ls -lah ${SRC_DIR} && ash ${SRC_DIR}/apply_ckan_patches.sh
RUN rm -rf /srv/app/src/ckan/.git

# Create a constraint file that limits the Cython version to a compatible one, see https://github.com/yaml/pyyaml/issues/736
RUN echo 'Cython < 3.0' > /tmp/constraint.txt
RUN PIP_CONSTRAINT=/tmp/constraint.txt pip wheel --wheel-dir=/wheels PyYAML==5.4.1

# RUN pip-compile ckan/requirements.in
RUN pip wheel --wheel-dir=/wheels -r ckan/requirements.txt
RUN pip wheel --wheel-dir=/wheels uWSGI==2.0.20 gevent==21.12.0 greenlet==1.1.3

###########################
### Default-Extensions ####
###########################
FROM alpine:3.13.7 as extbuild

# Set src dirs
ENV SRC_DIR=/srv/app/src
ENV PIP_SRC=${SRC_DIR}

# List of default extensions
ENV DEFAULT_EXTENSIONS envvars

# Locations and tags, please use specific tags or revisions
ENV ENVVARS_GIT_URL=https://github.com/okfn/ckanext-envvars
ENV ENVVARS_GIT_BRANCH=0.0.1

RUN apk add --no-cache \
    python3 \
    python3-dev \
    git \
    curl 

# Link python to python3
RUN ln -s /usr/bin/python3 /usr/bin/python

# Create the src directory
RUN mkdir -p ${SRC_DIR}

# Install pip
RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/get-pip.py && \
    python ${SRC_DIR}/get-pip.py

# Fetch and build the default CKAN extensions
RUN pip wheel --wheel-dir=/wheels git+${ENVVARS_GIT_URL}@${ENVVARS_GIT_BRANCH}#egg=ckanext-envvars

############
### MAIN ###
############
FROM alpine:3.13.7

LABEL maintainer="Keitaro Inc <info@keitaro.com>"
LABEL org.opencontainers.image.source https://github.com/keitaroinc/docker-ckan

ENV APP_DIR=/srv/app
ENV SRC_DIR=/srv/app/src
ENV CKAN_DIR=${SRC_DIR}/ckan
ENV DATA_DIR=/srv/app/data
ENV PIP_SRC=${SRC_DIR}
ENV CKAN_SITE_URL=http://localhost:5000
ENV CKAN__PLUGINS envvars image_view text_view recline_view datastore datapusher

# Install necessary packages to run CKAN
RUN apk add --no-cache \
    python3 \
    bash \
    git \
    gettext \
    curl \
    postgresql-client \
    libmagic \
    pcre \
    libxslt \
    libxml2 \
    tzdata \
    apache2-utils && \
    # Create SRC_DIR
    mkdir -p ${SRC_DIR} && \
    # Link python to python3
    ln -s /usr/bin/python3 /usr/bin/python

# Install pip
RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/get-pip.py && \
    python ${SRC_DIR}/get-pip.py

# Get artifacts from build stages
COPY --from=ckanbuild /wheels /srv/app/wheels
COPY --from=extbuild /wheels /srv/app/ext_wheels
COPY --from=ckanbuild /srv/app/src/ckan ${CKAN_DIR}

# Additional install steps for build stages artifacts
RUN pip install --no-index --find-links=/srv/app/wheels uWSGI==2.0.20 gevent==21.12.0

# Create a local user and group to run the app
RUN addgroup -g 92 -S ckan && \
    adduser -u 92 -h /srv/app -H -D -S -G ckan ckan

WORKDIR ${CKAN_DIR}

# Install CKAN
RUN pip install -e /srv/app/src/ckan && \
    cp who.ini ${APP_DIR} && \
    pip install --no-index --find-links=/srv/app/wheels -r requirements.txt && \
    # Install default CKAN extensions
    pip install --no-index --find-links=/srv/app/ext_wheels ckanext-envvars && \
    # Create and update CKAN config
    # Set timezone
    echo "UTC" >  /etc/timezone && \
    # Generate CKAN config
    ckan generate config ${APP_DIR}/production.ini && \
    ckan config-tool ${APP_DIR}/production.ini "beaker.session.secret = " && \
    # Configure plugins
    ckan config-tool ${APP_DIR}/production.ini "ckan.plugins = ${CKAN__PLUGINS}" && \
    # Create the data directory
    mkdir ${DATA_DIR} && \
    # Webassets can't be loaded from env variables at runtime, it needs to be in the config so that it is created
    ckan config-tool ${APP_DIR}/production.ini "ckan.webassets.path = ${DATA_DIR}/webassets" && \
    # Set the default level for extensions to INFO
    ckan config-tool ${APP_DIR}/production.ini -s logger_ckanext -e level=INFO && \
    # Change ownership to app user
    chown -R ckan:ckan /srv/app

RUN pip install sqlalchemy==1.3.19
# Remove wheels
RUN rm -rf /srv/app/wheels /srv/app/ext_wheels

# Copy necessary scripts
COPY setup/app ${APP_DIR}

WORKDIR ${APP_DIR}

# Create entrypoint directory for children image scripts
ONBUILD RUN mkdir docker-entrypoint.d

# Create afterinit directory for children image scripts
ONBUILD RUN mkdir docker-afterinit.d

EXPOSE 5000

HEALTHCHECK --interval=10s --timeout=5s --retries=5 CMD curl --fail http://localhost:5000/api/3/action/status_show || exit 1

USER ckan

CMD ["/srv/app/start_ckan.sh"]