anchor.diff:  # See the License for the specific language governing permissions and
   # limitations under the License.
   #
  -FROM ubuntu:22.04
  +FROM ubuntu:20.04
   
   WORKDIR /root
   
  
positive.code: RUN wget https://raw.githubusercontent.com/juven/maven-bash-completion/master/bash_completion.bash -O /etc/bash_completion.d/maven
  
  # --------------------------------
  # Install Pig
  ENV PIG_VERSION=0.17.0
  RUN cd /usr/local/ && wget "https://www.apache.org/dyn/closer.lua?action=download&filename=/pig/pig-${PIG_VERSION}/pig-${PIG_VERSION}.tar.gz" -O "pig-${PIG_VERSION}.tar.gz"
  RUN cd /usr/local/ && tar xzf pig-${PIG_VERSION}.tar.gz
  ENV PIG_HOME /usr/local/pig-*/
  ENV PATH ${PIG_HOME}/bin:${PATH}
  RUN chmod a+rwX -R ${PIG_HOME}/bin
  
  # --------------------------------
  # Install shellcheck
  RUN cd /usr/local/bin && \
       wget https://github.com/koalaman/shellcheck/releases/download/stable/shellcheck-stable.linux.x86_64.tar.xz && \
       tar xJf shellcheck-stable.linux.x86_64.tar.xz && \
       mv shellcheck-stable/shellcheck . && \
       rm -rf shellcheck-stable*
  
  # --------------------------------
  # Install Hugo
  ENV HUGO_VERSION=0.89.0
  RUN cd /usr/local/bin && \
       wget https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_${HUGO_VERSION}_Linux-64bit.tar.gz && \
       tar xzf hugo_*.tar.gz
  
  # --------------------------------
  # Add a welcome message and environment checks.
  
negative.code: 
  # --------------------------------
  # Install Maven
  ENV MAVEN_VERSION=3.8.5
  RUN mkdir -p /usr/local/apache-maven
  RUN cd /usr/local/ && wget "https://www.apache.org/dyn/closer.lua?action=download&filename=/maven/maven-3/${MAVEN_VERSION}/binaries/apache-maven-${MAVEN_VERSION}-bin.tar.gz" -O "apache-maven-${MAVEN_VERSION}-bin.tar.gz"
  RUN cd /usr/local/ && tar xzf apache-maven-${MAVEN_VERSION}-bin.tar.gz --strip-components 1 -C /usr/local/apache-maven
  