# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
#

ARG IMAGE_NAME=openjdk
ARG IMAGE_TAG=8-jre
FROM ${IMAGE_NAME}:${IMAGE_TAG} AS artifactbase
ARG MAINTAINER="Apache NiFi <dev@nifi.apache.org>"
LABEL maintainer="${MAINTAINER}"

ARG NIFI_VERSION
ARG NIFI_BINARY
ARG NIFI_TOOLKIT_BINARY

ENV NIFI_BASE_DIR /opt/nifi
ENV NIFI_HOME ${NIFI_BASE_DIR}/nifi-current
ENV NIFI_TOOLKIT_HOME ${NIFI_BASE_DIR}/nifi-toolkit-current
ENV NIFI_PID_DIR=${NIFI_HOME}/run
ENV NIFI_LOG_DIR=${NIFI_HOME}/logs

ADD sh/ ${NIFI_BASE_DIR}/scripts/
RUN chmod -R +x ${NIFI_BASE_DIR}/scripts/*.sh

COPY $NIFI_BINARY $NIFI_BASE_DIR
RUN unzip ${NIFI_BASE_DIR}/nifi-${NIFI_VERSION}-bin.zip -d ${NIFI_BASE_DIR} \
    && rm ${NIFI_BASE_DIR}/nifi-${NIFI_VERSION}-bin.zip \
    && mv ${NIFI_BASE_DIR}/nifi-${NIFI_VERSION} ${NIFI_HOME} \
    && ln -s ${NIFI_HOME} ${NIFI_BASE_DIR}/nifi-${NIFI_VERSION}

COPY $NIFI_TOOLKIT_BINARY $NIFI_BASE_DIR
RUN unzip ${NIFI_BASE_DIR}/nifi-toolkit-${NIFI_VERSION}-bin.zip -d ${NIFI_BASE_DIR} \
    && rm ${NIFI_BASE_DIR}/nifi-toolkit-${NIFI_VERSION}-bin.zip \
    && mv ${NIFI_BASE_DIR}/nifi-toolkit-${NIFI_VERSION} ${NIFI_TOOLKIT_HOME} \
    && ln -s ${NIFI_TOOLKIT_HOME} ${NIFI_BASE_DIR}/nifi-toolkit-${NIFI_VERSION}

# Create necessary directories
RUN mkdir -p ${NIFI_HOME}/conf \
    && mkdir -p ${NIFI_HOME}/database_repository \
    && mkdir -p ${NIFI_HOME}/flowfile_repository \
    && mkdir -p ${NIFI_HOME}/content_repository \
    && mkdir -p ${NIFI_HOME}/provenance_repository \
    && mkdir -p ${NIFI_HOME}/state \
    && mkdir -p ${NIFI_LOG_DIR}

FROM ${IMAGE_NAME}:${IMAGE_TAG}
ARG MAINTAINER="Apache NiFi <dev@nifi.apache.org>"
LABEL maintainer="${MAINTAINER}"

ARG UID=1000
ARG GID=1000

ENV NIFI_BASE_DIR /opt/nifi
ENV NIFI_HOME ${NIFI_BASE_DIR}/nifi-current
ENV NIFI_TOOLKIT_HOME ${NIFI_BASE_DIR}/nifi-toolkit-current
ENV NIFI_PID_DIR=${NIFI_HOME}/run
ENV NIFI_LOG_DIR=${NIFI_HOME}/logs

# Setup NiFi user and create necessary directories
RUN groupadd -g ${GID} nifi || groupmod -n nifi `getent group ${GID} | cut -d: -f1` \
    && useradd --shell /bin/bash -u ${UID} -g ${GID} -m nifi \
    && apt-get update \
    && apt-get install -y jq xmlstarlet procps

COPY --chown=nifi:nifi --from=artifactbase $NIFI_BASE_DIR $NIFI_BASE_DIR

VOLUME ${NIFI_LOG_DIR} \
       ${NIFI_HOME}/conf \
       ${NIFI_HOME}/database_repository \
       ${NIFI_HOME}/flowfile_repository \
       ${NIFI_HOME}/content_repository \
       ${NIFI_HOME}/provenance_repository \
       ${NIFI_HOME}/state

USER nifi

# Clear nifi-env.sh in favour of configuring all environment variables in the Dockerfile
RUN echo "#!/bin/sh\n" > $NIFI_HOME/bin/nifi-env.sh

# Web HTTP(s) & Socket Site-to-Site Ports
EXPOSE 8080 8443 10000 8000

WORKDIR ${NIFI_HOME}

# Apply configuration and start NiFi
#
# We need to use the exec form to avoid running our command in a subshell and omitting signals,
# thus being unable to shut down gracefully:
# https://docs.docker.com/engine/reference/builder/#entrypoint
#
# Also we need to use relative path, because the exec form does not invoke a command shell,
# thus normal shell processing does not happen:
# https://docs.docker.com/engine/reference/builder/#exec-form-entrypoint-example
ENTRYPOINT ["../scripts/start.sh"]