Part of https://medium.com/@icheko/jenkinsfile-runner-f01930513572

medium-jenkinsfile-runner-01.sh

function jenkins-runner(){
        
        while test $# -gt 0; do
        case "$1" in
                -h|--help)
                        echo " "
                        echo "jenkins-runner [options]"
                        echo " "
                        echo "options:"
                        echo "-h, --help                        show brief help"
                        echo "-df                               specify docker run flags to include"
                        echo "                                  example: -df ' -e TEST=VALUE -e TEST2=VALUE2'"
                        echo " "
                        echo "--bash                            bash into the container"
                        echo "--heroku-auth                     include HEROKU_AUTH_NETRC variable to properly mount the Heroku auth file"
                        return 0
                        ;;
                -df)
                        shift
                        if test $# -gt 0; then
                                local DOCKER_FLAGS=${1}
                                echo DOCKER_FLAGS: ${DOCKER_FLAGS}
                        fi
                        shift
                        ;;
                --heroku-auth)
                        shift
                        local HEROKU_AUTH_NETRC="-e HEROKU_AUTH_NETRC=$HOME/.netrc:/root/.netrc"
                        echo HEROKU_AUTH: ${HEROKU_AUTH_NETRC}
                        ;;
                --bash)
                        shift
                        local BASH_CMD="-it --entrypoint bash"
                        echo BASH_CMD: ${BASH_CMD}
                        ;;
                *)
                                                local DOCKER_CMD=${1}
                                                echo DOCKER_CMD
                        break
                        ;;
        esac
        done

        if [ ! -n "$BASH_CMD" ]; then
                local DOCKER_CMD="--runHome /workspace/jenkins"
                echo INCLUDING JENKINS FLAGS: ${DOCKER_CMD}
        fi

        echo
        echo "Cleaning jenkins dir"
        echo "-----------------------"
        rm -Rfv jenkins/
        mkdir -p jenkins
        echo

        docker run --rm --privileged \
                -v /var/run/docker.sock:/var/run/docker.sock \
                -v $(pwd):/workspace \
                -e USER_HOME=$HOME \
                -e USER_PWD=$PWD \
                ${DOCKER_FLAGS} \
                ${BASH_CMD} \
                ${HEROKU_AUTH_NETRC} \
                ppiper/jenkinsfile-runner \
                ${DOCKER_CMD}
}