Dockerfile.build

FROM openjdk:8-jdk-slim

RUN \
  apt-get update &&\
  apt-get -y install git openssh-client

ENV SCALA_VERSION 2.12.10
RUN \
  apt-get update &&\
  apt-get install -qq -y curl gnupg2 apt-transport-https &&\
  apt-get clean autoremove -y &&\
  rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* &&\
  curl -fsL https://downloads.typesafe.com/scala/$SCALA_VERSION/scala-$SCALA_VERSION.tgz | tar xfz - -C /root/ && \
  echo >> /root/.bashrc && \
  echo "export PATH=~/scala-$SCALA_VERSION/bin:$PATH" >> /root/.bashrc

ENV SBT_VERSION 1.5.7
RUN \
  curl -L -o sbt-$SBT_VERSION.deb https://repo.scala-sbt.org/scalasbt/debian/sbt-$SBT_VERSION.deb && \
  dpkg -i sbt-$SBT_VERSION.deb && \
  rm sbt-$SBT_VERSION.deb && \
  apt-get update && \
  apt-get -qq -y install sbt && \
  apt-get clean &&\
  rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* &&\
  sbt -Dsbt.rootdir=true -batch sbtVersion &&\
  mkdir -p project && \
  echo "scalaVersion := \"${SCALA_VERSION}\"" > build.sbt && \
  echo "sbt.version=${SBT_VERSION}" > project/build.properties && \
  echo "case object Temp" > Temp.scala && \
  sbt -Dsbt.rootdir=true -batch compile && \
  rm -r project && rm build.sbt && rm Temp.scala && rm -r target

RUN apt-get update &&\
    apt-get install -y apt-transport-https ca-certificates curl gnupg2 software-properties-common &&\
    curl -fsSL https://download.docker.com/linux/debian/gpg | apt-key add - &&\
    add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/debian $(lsb_release -cs) stable" &&\
    apt-get update &&\
    apt-get install -y docker-ce docker-ce-cli containerd.io &&\
    apt-get clean autoremove -y &&\
    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

RUN adduser --home /var/lib/jenkins --disabled-password --gecos '' --uid 1000 jenkins

RUN mkdir /var/lib/jenkins/.ssh/ && \
    ssh-keyscan github.com >> /var/lib/jenkins/.ssh/known_hosts && \
    echo "Host *" >> /var/lib/jenkins/.ssh/config && \
    echo "    StrictHostKeyChecking no" >> /var/lib/jenkins/.ssh/config && \
    echo "    UserKnownHostsFile /dev/null" >> /var/lib/jenkins/.ssh/config && \
    touch /var/lib/jenkins/.ssh/config

USER jenkins