# Image to build the application
FROM ubuntu:bionic

RUN \
  # Create builder user
  groupadd builder && \
  useradd builder -s /bin/bash -m -g builder -G sudo && \
  echo 'builder:builder' |chpasswd && \
  mkdir /home/builder/app && \
  apt-get update && \
  # Install utilities
  apt-get install -y \
    wget \
    curl \
    vim \
    git \
    zip \
    bzip2 \
    python \
    build-essential \
    software-properties-common \
    sudo && \
  # install OpenJDK 11
  add-apt-repository ppa:openjdk-r/ppa && \
  apt-get update && \
  apt-get install -y openjdk-11-jdk && \
  update-java-alternatives -s java-1.11.0-openjdk-amd64 && \
  # Install Maven
  apt-get install -y maven && \
  # cleanup
  apt-get clean && \
  rm -rf \
    /var/lib/apt/lists/* \
    /tmp/* \
    /var/tmp/*

RUN \
  # fix builder user permissions
  chown -R builder:builder \
    /home/builder && \
  # cleanup
  rm -rf \
    /home/builder/.cache/ \
    /var/lib/apt/lists/* \
    /tmp/* \
    /var/tmp/*

USER builder

WORKDIR "/home/builder/app"

# Copy sources
COPY . /home/builder/app/

# Compile project
RUN mvn package

# Image to run the application
FROM openjdk:11.0.11-jre-slim

COPY --from=0 /home/builder/app/target/permutations.jar /app/permutations.jar

ENTRYPOINT ["java", "-jar", "/app/permutations.jar"]