anchor.diff:        clang \
         curl \
         git \
  +      gnupg \
         libatomic1 \
         libbsd0 \
         libc6-dev \
  
positive.code:     cd .. && \
      rm -rf v${PROTOC_VERSION}.zip protobuf-${PROTOC_VERSION}
  
  RUN curl -L -O https://github.com/AdoptOpenJDK/openjdk11-binaries/releases/download/jdk-11.0.3%2B7/OpenJDK11U-jdk_x64_linux_hotspot_11.0.3_7.tar.gz && \
      tar -xf OpenJDK11U-jdk_x64_linux_hotspot_11.0.3_7.tar.gz && \
      mv jdk-11.0.3+7 /usr/local/lib/ && \
      rm OpenJDK11U-jdk_x64_linux_hotspot_11.0.3_7.tar.gz
  
  ENV PATH /usr/local/lib/jdk-11.0.3+7/bin:$PATH
  
  RUN java -version
  
  ARG SWIFT_PLATFORM=ubuntu18.04
  ARG SWIFT_BRANCH=swift-5.0.1-release
  ARG SWIFT_VERSION=swift-5.0.1-RELEASE
  
negative.code:     chmod -R o+r /usr/lib/swift
  
  RUN swift --version
  