entrypoint.sh

#!/usr/bin/env bash

# docker run -it -e JENKINS_USER=$(id -u) --rm -p 8080:8080 -p 50000:50000 -v $HOME/.jenkins:/var/jenkins_home -v /var/run/docker.sock:/var/run/docker.sock --name jenkins trion/jenkins-docker-client

DOCKER_SOCKET=/var/run/docker.sock
DOCKER_GROUP=docker

# echo "currently $(id) switch to ${JENKINS_USER}"

if [ -S ${DOCKER_SOCKET} ]; then

    if ! id -u ${JENKINS_USER} > /dev/null 2>&1; then
      #echo "adding jenkins use for uid ${JENKINS_USER}"
      userdel jenkins
      adduser -u ${JENKINS_USER} -D -S jenkins
    fi
    DOCKER_GID=$(stat -c '%g' ${DOCKER_SOCKET})
    #echo "adding ${DOCKER_GID} to group ${DOCKER_GROUP}"
    groupadd -for -g ${DOCKER_GID} ${DOCKER_GROUP}
    usermod -aG ${DOCKER_GROUP} jenkins

fi

if [[ -v JENKINS_CAC ]]; then
  echo "Configuration as Code enabled"
  export JAVA_OPTS=-Djenkins.install.runSetupWizard=false
  export CASC_JENKINS_CONFIG=/var/jenkins_home/config.yaml
  /bin/jenkins-plugin-cli --plugin-file /provisioning/plugins.txt
  if [ ! -e /var/jenkins_home/config.yaml ]; then
    echo "Configuration as Code: Installing default config"
    cp /provisioning/config.yaml /var/jenkins_home/config.yaml
  fi
fi

#if is root
if [ "$EUID" -ne 0 ]; then
    exec /usr/local/bin/jenkins.sh
fi

echo "Starting /usr/local/bin/jenkins.sh as ${JENKINS_USER}"
su-exec ${JENKINS_USER} /usr/local/bin/jenkins.sh