FROM ubuntu:focal as minimal-system

# Warning: This file is experimental.
#
# Short-term goals:
# * Be a suitable replacement for the `edxops/edxapp` image in devstack (in progress).
# * Take advantage of Docker caching layers: aim to put commands in order of
#   increasing cache-busting frequency.
# * Related to ^, use no Ansible or Paver.
# Long-term goal:
# * Be a suitable base for production LMS and CMS images (THIS IS NOT YET THE CASE!).

ARG DEBIAN_FRONTEND=noninteractive
ARG SERVICE_VARIANT
ARG SERVICE_PORT

# Env vars: paver
# We intentionally don't use paver in this Dockerfile, but Devstack may invoke paver commands
# during provisioning. Enabling NO_PREREQ_INSTALL tells paver not to re-install Python
# requirements for every paver command, potentially saving a lot of developer time.
ARG NO_PREREQ_INSTALL='1'

# Env vars: locale
ENV LANG='en_US.UTF-8'
ENV LANGUAGE='en_US:en'
ENV LC_ALL='en_US.UTF-8'

# Env vars: configuration
ENV CONFIG_ROOT='/edx/etc'
ENV LMS_CFG="$CONFIG_ROOT/lms.yml"
ENV CMS_CFG="$CONFIG_ROOT/cms.yml"

# Env vars: path
ENV VIRTUAL_ENV="/edx/app/edxapp/venvs/edxapp"
ENV PATH="${VIRTUAL_ENV}/bin:${PATH}"
ENV PATH="/edx/app/edxapp/edx-platform/node_modules/.bin:${PATH}"
ENV PATH="/edx/app/edxapp/edx-platform/bin:${PATH}"
ENV PATH="/edx/app/edxapp/nodeenv/bin:${PATH}"

WORKDIR /edx/app/edxapp/edx-platform

# Create user before assigning any directory ownership to it.
RUN useradd -m --shell /bin/false app

# Use debconf to set locales to be generated when the locales apt package is installed later.
RUN echo "locales locales/default_environment_locale select en_US.UTF-8" | debconf-set-selections
RUN echo "locales locales/locales_to_be_generated multiselect en_US.UTF-8 UTF-8" | debconf-set-selections

# Install requirements that are absolutely necessary
RUN apt-get update && \
    apt-get -y dist-upgrade && \
    apt-get -y install --no-install-recommends \
        python3 \
        python3-venv \
        python3.8 \
        python3.8-minimal \
        # python3-dev: required for building mysqlclient python package version 2.2.0
        python3-dev \
        libpython3.8 \
        libpython3.8-stdlib \
        libmysqlclient21 \
        # libmysqlclient-dev: required for building mysqlclient python package version 2.2.0
        libmysqlclient-dev \
        pkg-config \
        libssl1.1 \
        libxmlsec1-openssl \
        # lynx: Required by https://github.com/openedx/edx-platform/blob/b489a4ecb122/openedx/core/lib/html_to_text.py#L16
        lynx \
        ntp \
        git \
        build-essential \
        gettext \
        gfortran \
        graphviz \
        locales \
        swig \
    && \
    apt-get clean all && \
    rm -rf /var/lib/apt/*

RUN mkdir -p /edx/var/edxapp
RUN mkdir -p /edx/etc
RUN chown app:app /edx/var/edxapp

# The builder-production stage is a temporary stage that installs required packages and builds the python virtualenv,
# installs nodejs and node_modules.
# The built artifacts from this stage are then copied to the base stage.
FROM minimal-system as builder-production

RUN apt-get update && \
    apt-get -y install --no-install-recommends \
        curl \
        libssl-dev \
        libffi-dev \
        libfreetype6-dev \
        libgeos-dev \
        libgraphviz-dev \
        libjpeg8-dev \
        liblapack-dev \
        libpng-dev \
        libsqlite3-dev \
        libxml2-dev \
        libxmlsec1-dev \
        libxslt1-dev

# Setup python virtual environment
# It is already 'activated' because $VIRTUAL_ENV/bin was put on $PATH
RUN python3.8 -m venv "${VIRTUAL_ENV}"

# Install python requirements
# Requires copying over requirements files, but not entire repository
COPY requirements requirements
RUN pip install -r requirements/pip.txt
RUN pip install -r requirements/edx/base.txt

# Install node and npm
RUN nodeenv /edx/app/edxapp/nodeenv --node=16.14.0 --prebuilt
RUN npm install -g npm@8.5.x

# This script is used by an npm post-install hook.
# We copy it into the image now so that it will be available when we run `npm install` in the next step.
# The script itself will copy certain modules into some uber-legacy parts of edx-platform which still use RequireJS.
COPY scripts/copy-node-modules.sh scripts/copy-node-modules.sh

# Install node modules
COPY package.json package.json
COPY package-lock.json package-lock.json
RUN npm set progress=false && npm ci

# The builder-development stage is a temporary stage that installs python modules required for development purposes
# The built artifacts from this stage are then copied to the development stage.
FROM builder-production as builder-development

RUN pip install -r requirements/edx/development.txt

# base stage
FROM minimal-system as base

# Copy python virtual environment, nodejs and node_modules
COPY --from=builder-production /edx/app/edxapp/venvs/edxapp /edx/app/edxapp/venvs/edxapp
COPY --from=builder-production /edx/app/edxapp/nodeenv /edx/app/edxapp/nodeenv
COPY --from=builder-production /edx/app/edxapp/edx-platform/node_modules /edx/app/edxapp/edx-platform/node_modules

# Copy over remaining parts of repository (including all code)
COPY . .

# Install Python requirements again in order to capture local projects
RUN pip install -e .

# Production target
FROM base as production

USER app

ENV EDX_PLATFORM_SETTINGS='docker-production'
ENV SERVICE_VARIANT="${SERVICE_VARIANT}"
ENV SERVICE_PORT="${SERVICE_PORT}"
ENV DJANGO_SETTINGS_MODULE="${SERVICE_VARIANT}.envs.$EDX_PLATFORM_SETTINGS"
EXPOSE ${SERVICE_PORT}

CMD gunicorn \
    -c /edx/app/edxapp/edx-platform/${SERVICE_VARIANT}/docker_${SERVICE_VARIANT}_gunicorn.py \
    --name ${SERVICE_VARIANT} \
    --bind=0.0.0.0:${SERVICE_PORT} \
    --max-requests=1000 \
    --access-logfile \
    - ${SERVICE_VARIANT}.wsgi:application

# Development target
FROM base as development

RUN apt-get update && \
    apt-get -y install --no-install-recommends \
        # wget is used in Makefile for common_constraints.txt
        wget \
    && \
    apt-get clean all && \
    rm -rf /var/lib/apt/*

COPY --from=builder-development /edx/app/edxapp/venvs/edxapp /edx/app/edxapp/venvs/edxapp

RUN ln -s "$(pwd)/lms/envs/devstack-experimental.yml" "$LMS_CFG"
RUN ln -s "$(pwd)/cms/envs/devstack-experimental.yml" "$CMS_CFG"
# Temporary compatibility hack while devstack is supporting both the old `edxops/edxapp` image and this image.
# * Add in a dummy ../edxapp_env file
# * devstack sets /edx/etc/studio.yml as CMS_CFG.
RUN ln -s "$(pwd)/cms/envs/devstack-experimental.yml" "/edx/etc/studio.yml"
RUN touch ../edxapp_env

ENV EDX_PLATFORM_SETTINGS='devstack_docker'
ENV SERVICE_VARIANT="${SERVICE_VARIANT}"
EXPOSE ${SERVICE_PORT}
CMD ./manage.py ${SERVICE_VARIANT} runserver 0.0.0.0:${SERVICE_PORT}