Dockerfile for adding a new user.

add_user.dockerfile

# Author:
# Yaoyu Hu <yaoyuh@andrew.cmu.edu>
#
# Date:
# 2021-12-28

# Arguments.
ARG base_image

FROM ${base_image}

# Add a user with the same user_id as the user outside the container

ARG user_id
ARG user_name
ARG group_id
ARG group_name

RUN echo "user_id=${user_id}" \
 && echo "user_name=${user_name}" \
 && echo "group_od=${group_id}" \
 && echo "group_name=${group_name}"

# Create new group if it doesn't already exist.
RUN ["/bin/bash", "-c", "if [[ -z \"$(getent group ${group_id})\" ]]; then groupadd -g ${group_id} ${group_name}; fi"]

# Create a new user.
RUN useradd --uid ${user_id} --gid ${group_id} -ms /bin/bash ${user_name} \
 && echo "${user_name}:${user_name}" | chpasswd \
 && adduser ${user_name} sudo \
 && echo "${user_name} ALL=NOPASSWD: ALL" >> /etc/sudoers.d/${user_name}

# run as the developer user
USER ${user_name}

# Configure the .bashrc file.
RUN touch /home/${user_name}/.tmux.conf \
 && echo 'set -g mouse on' >> /home/${user_name}/.tmux.conf

# Configure ROS as needed.
# RUN echo 'source /opt/ros/noetic/setup.bash' >> /home/${user_name}/.bashrc \
#  && echo 'source /ws/devel/setup.bash' >> /home/${user_name}/.bashrc \

# running container start dir
WORKDIR /home/${user_name}