anchor.diff:  FROM centos:7
   
  +RUN useradd jenkins -u 1500 -g root
  +
   RUN rpm --import file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
  -RUN yum -y install wget
  -RUN yum -y install curl
  -RUN yum -y install make m4 gcc patch unzip
  -RUN yum -y install git rsync mercurial
  -RUN yum -y install gcc-c++
  -RUN yum -y install bzip2-devel libffi-devel snappy-devel libev-devel
  -RUN yum -y install python-devel
  -
  -# TODO: What about darcs ?
  -
  -RUN useradd jenkins -u 1500 -g root
  -
   RUN rpm -iUvh http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-10.noarch.rpm
  -RUN yum -y update && \
  -    yum -y install python-pip openssl-devel gmp-devel which zlib-devel \
  -                   ncurses-devel bzip2 cmake3 sudo
  +
  +RUN yum -y update \
  +    && yum -y install wget curl \
  +                      make m4 gcc patch unzip \
  +                      git rsync mercurial \
  +                      gcc-c++ \
  +                      bzip2-devel libffi-devel snappy-devel libev-devel \
  +                      python-devel \
  +                      file \
  +                      python-pip openssl-devel gmp-devel which zlib-devel \
  +                      ncurses-devel bzip2 cmake3 sudo \
  +                      autoconf help2man perl-Thread-Queue \
  +                      libtool
   
   # make sudo work:
   #
  
positive.code:         ezxmlm
  
  
  RUN yum -y install autoconf help2man perl-Thread-Queue
  
  # AUTOMAKE-1.14.1 (for YASM)
  RUN wget http://ftp.gnu.org/gnu/automake/automake-1.14.1.tar.xz \
          && tar -xvf automake-1.14.1.tar.xz \
  
negative.code: 
  # install gtest TODO:specific version ?
  RUN git clone  https://github.com/google/googletest \
      && cd googletest && git checkout release-1.8.0 \
      && mkdir build && cd build && cmake3 .. \
      && sudo make install
  RUN cd googletest && git log --oneline | head -n 5
  
  