anchor.diff:    && gem install grpc-tools --version '=1.10.0' --no-ri --no-rdoc
   
   # Install grpc_php_plugin
  -RUN apt-get update \
  -  && apt-get install -y autoconf autogen libtool \
  -  && git clone -b v1.7.2 https://github.com/grpc/grpc.git /temp/grpc \
  +RUN git clone -b v1.7.2 --recurse-submodules https://github.com/grpc/grpc.git /temp/grpc \
     && cd /temp/grpc \
  -  && git submodule update --init --recursive \
     && make -j $(nproc) grpc_php_plugin \
     && mv ./bins/opt/grpc_php_plugin /usr/local/bin/ \
     && cd / \
  
positive.code:   && chmod a+x /usr/local/bin/php-cs-fixer \
    && cd /
  
  # Set up tools for Python code generation; these are:
  #   pandoc: an apt package that can convert text between formats
  #     (example: Markdown to Restructured Text)
  #   protoc-docs-plugin: A protoc plugin to add docstrings to the Python
  #     protoc output.
  RUN apt-get update \
    && apt-get install -y pandoc \
    && pip3 install protoc-docs-plugin==0.3.0 \
    && rm -rf /var/lib/apt/lists/*
  
  # Install .NET Core SDK (about 280MB)
  # Install .NET CLI dependencies
  RUN apt-get update \
      && apt-get install -y --no-install-recommends \
      libc6 \
      libcurl3 \
      libgcc1 \
      libgssapi-krb5-2 \
      liblttng-ust0 \
      libssl1.0.0 \
      libstdc++6 \
      libunwind8 \
      libuuid1 \
      zlib1g \
      && rm -rf /var/lib/apt/lists/*
  
  # Install .NET Core SDK
  ENV DOTNET_SDK_VERSION 1.0.4
  
negative.code:     && rm dotnet.tar.gz \
      && ln -s /usr/share/dotnet/dotnet /usr/bin/dotnet
  
  # Install googleapis.
  RUN git clone https://github.com/googleapis/googleapis --single-branch \
    && cd googleapis \
    && git checkout $GOOGLEAPIS_HASH \
    && cd .. \
    && rm -rf /googleapis/.git/
  
  # Install toolkit.
  RUN git clone https://github.com/googleapis/gapic-generator toolkit \
    && cd toolkit/ \
    && git checkout $GAPIC_GENERATOR_HASH \
    && ./gradlew fatJar createToolPaths \
    && cd .. \
    && rm -rf /toolkit/.git/
  ENV TOOLKIT_HOME /toolkit
  
  # Setup git config used by github commit pushing.
  RUN git config --global user.email googleapis-publisher@google.com \
  