# OpenSim for a container
#   docker build -t opensim-standalone .

FROM mono:6

LABEL Description="Docker container running OpenSimulator"

ENV OPENSIMDIR=/home/opensim/opensim
ENV VERSIONDIR=/home/opensim/VERSION

# Arguments passed in so they can be embedded in the built image
ARG BUILD_DATE
ARG BUILD_DAY
ARG OS_DOCKER_VERSION
ARG OS_DOCKER_GIT_BRANCH
ARG OS_DOCKER_GIT_COMMIT
ARG OS_DOCKER_GIT_COMMIT_SHORT

# Arguments for fetching OpenSimulator
ARG OS_REPO=git://opensimulator.org/git/opensim
ARG OS_BRANCH=master

# Include required packages ('coreutils git vim' included for debugging)
#  (20220127 using MariaDB as Mono image built on Debian 10)
RUN apt-get update \
    && apt-get install -y \
        coreutils procps git vim \
        screen \
        ccrypt \
        cron \
        mariadb-client \
        sqlite \
    && rm -rf /var/lib/apt/lists/*

# The simulator is run under the user name 'opensim'
RUN adduser --disabled-password --gecos 'OpenSimulator user' opensim

USER opensim:opensim

# Scripts that keep OpenSimulator running, make crash reports, clean up log files, etc
COPY --chown=opensim:opensim temp-run-scripts/*.sh /home/opensim/
COPY --chown=opensim:opensim temp-run-scripts/crontab /home/opensim/
COPY --chown=opensim:opensim temp-run-scripts/.vimrc /home/opensim/

# Version information that goes in the image
RUN mkdir -p $VERSIONDIR \
    && cd $VERSIONDIR \
    && echo $BUILD_DATE > "BUILD_DATE" \
    && echo $BUILD_DAY > "BUILD_DAY" \
    && echo $OS_DOCKER_VERSION > "OS_DOCKER_VERSION" \
    && echo $OS_DOCKER_GIT_BRANCH > "OS_DOCKER_GIT_BRANCH" \
    && echo $OS_DOCKER_GIT_COMMIT > "OS_DOCKER_GIT_COMMIT" \
    && echo $OS_DOCKER_GIT_COMMIT_SHORT > "OS_DOCKER_GIT_COMMIT_SHORT" \
    && echo ${OS_DOCKER_VERSION}-${BUILD_DAY}-${OS_DOCKER_GIT_COMMIT_SHORT} > "OS_DOCKER_IMAGE_VERSION"

# Fetch the latest version of the OpenSimulator sources.
RUN cd /home/opensim \
    && git clone --depth=1 $OS_REPO opensim \
    && cd $OPENSIMDIR \
    && git checkout $OS_BRANCH

# Extract version information from the fetched sources
RUN cd $OPENSIMDIR \
    && git rev-parse HEAD > $VERSIONDIR/OS_GIT_COMMIT \
    && git rev-parse --short HEAD > $VERSIONDIR/OS_GIT_COMMIT_SHORT \
    && grep "const string VersionNumber" ./OpenSim/Framework/VersionInfo.cs | \
        sed -e "s/^.*VersionNumber = \"\(.*\)\".*$/\1/" > $VERSIONDIR/OS_VERSION

# Build OpenSimulator
RUN cd $OPENSIMDIR \
    && chmod +x runprebuild48.sh \
    && ./runprebuild48.sh \
    && msbuild

# OpenSim.ini and other INI files include from "config-include/*"
#     so copy an empty versions to nullfy the default configuration.
RUN cd $OPENSIMDIR/bin \
    && /home/opensim/nullOutConfigInclude.sh

# Copy the configuration file sets for this image
RUN mkdir -p $OPENSIMDIR/bin/config
COPY --chown=opensim:opensim config/ $OPENSIMDIR/bin/config/
# Use the default, included configuration parameters
RUN cp $OPENSIMDIR/bin/OpenSim.ini.example $OPENSIMDIR/bin/OpenSim.ini

# Remove the run supression flag. If this file exists, OpenSim is not started by the run script.
RUN rm -f $OPENSIMDIR/../NOOPENSIM

WORKDIR $OPENSIMDIR/bin
ENTRYPOINT [ "/home/opensim/bootOpenSim.sh" ]

# No ports are exposed by default since the simulator and regions can be anywhere.
# The simulator defaults to port 9000.
# EXPOSE 9000/tcp
# EXPOSE 9000/udp

# Directories that can be overridden with a mounted volume for configuration.
# The default configuration is for a simple standalone region.
# All the normal configuration has been nulled out (OpenSim.ini is the default
#    and all the included files in bin/config-include are empty).
#    A non-standalone configuration replaces bin/config with files that do
#    the configuration of the whole system (include 'architecture' ini file and
#    the necessary other INI files).
VOLUME $OPENSIMDIR/bin/config