anchor.diff:  # Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
   # 02110-1301 USA, or see the FSF site: http://www.fsf.org.
   # ---------------------------------------------------------------------------
  -FROM jenkins/ssh-slave
  +FROM jenkins/ssh-slave:jdk11
   
   #    ____  ____  ____      ____  _   __        _
   #   |_  _||_  _||_  _|    |_  _|(_) [  |  _   (_)
  
positive.code:   rm apache-maven-3.6.2-bin.tar.gz
  
  # ci.xwiki.org expects:
  # - Java8 to be available at /home/hudsonagent/java8
  # - Java7 to be available at /home/hudsonagent/java7
  # - Maven to be available at /home/hudsonagent/maven
  # - Default java to be Java8
  RUN mkdir -p /home/hudsonagent && \
   ln -fs $JAVA_HOME /home/hudsonagent/java8 && \
   ln -fs /usr/lib/jvm/zulu-7-amd64 /home/hudsonagent/java7 && \
   ln -fs /home/hudsonagent/java8 /home/hudsonagent/java && \
   ln -fs /home/hudsonagent/java/bin/java /usr/bin/java && \
  
negative.code: ENV FIREFOX_DOWNLOAD_URL_1="https://download-installer.cdn.mozilla.net/pub/firefox/releases/$FIREFOX_VERSION_1/linux-x86_64/en-US/firefox-$FIREFOX_VERSION_1.tar.bz2"
  ENV FIREFOX_VERSION_2 32.0.1
  ENV FIREFOX_DOWNLOAD_URL_2="https://download-installer.cdn.mozilla.net/pub/firefox/releases/$FIREFOX_VERSION_2/linux-x86_64/en-US/firefox-$FIREFOX_VERSION_2.tar.bz2"
  RUN apt-get --no-install-recommends -y install libasound2 && \
    wget --no-verbose -O /tmp/firefox1.tar.bz2 $FIREFOX_DOWNLOAD_URL_1 && \
    rm -rf /opt/firefox && \
    tar -C /opt -xjf /tmp/firefox1.tar.bz2 && \
  