anchor.diff:      /bin/bash -l -c "rvm install 2.1.5" && \
       rm -rf /usr/local/rvm/src/ruby-2.1.5
   
  -# Install go (required by to build gohai)
  -RUN curl -o /tmp/go1.3.3.linux-amd64.tar.gz https://storage.googleapis.com/golang/go1.3.3.linux-amd64.tar.gz && \
  -    tar -C /usr/local -xzf /tmp/go1.3.3.linux-amd64.tar.gz && \
  -    echo "PATH=$PATH:/usr/local/go/bin" | tee /etc/profile.d/go.sh
  -
   # Install tar >> 1.23 so that Omnibus can use the -J option
  -RUN curl -o /tmp/tar123.tar.gz -L http://ftp.gnu.org/gnu/tar/tar-1.23.tar.gz
  -RUN cd /tmp && tar -xzf /tmp/tar123.tar.gz && \
  +RUN curl -o /tmp/tar-$TAR_VERSION_ARG.tar.gz -L http://ftp.gnu.org/gnu/tar/tar-$TAR_VERSION_ARG.tar.gz
  +RUN cd /tmp && tar -xzf /tmp/tar-$TAR_VERSION_ARG.tar.gz && \
       rm -f /bin/tar /bin/gtar && \
  -    cd /tmp/tar-1.23 && FORCE_UNSAFE_CONFIGURE=1 ./configure --prefix=/ && make && make install && \
  +    cd /tmp/tar-$TAR_VERSION_ARG && FORCE_UNSAFE_CONFIGURE=1 ./configure --prefix=/ && make && make install && \
       ln -sf /bin/tar /bin/gtar && \
  -    cd - && rm -rf /tmp/tar123.tar.gz
  +    cd - && rm -rf /tmp/tar-$TAR_VERSION_ARG.tar.gz
   
   # now build git
   # dependencies
  
positive.code:     perl-devel \
      zlib-devel
  
  RUN /opt/curl/bin/curl -o /tmp/git-2.7.0.tar.gz -L https://www.kernel.org/pub/software/scm/git/git-2.7.0.tar.gz && \
      cd /tmp && tar -xzf /tmp/git-2.7.0.tar.gz && \
      cd /tmp/git-2.7.0 && make configure && ./configure --with-ssl --prefix=/usr \
         OPENSSLDIR=/opt/openssl \
         CURLDIR=/opt/curl \
         CPPFLAGS="-I/opt/curl/include" \
         LDFLAGS="-L/opt/curl/lib" && make all && make install && \
      cd - && rm -rf /tmp/git-2.7.0 && rm -f /tmp/git-2.7.0.tar.gz
  
  RUN mkdir -p /etc/ld.so.conf.d/ && echo "/opt/curl/lib" > /etc/ld.so.conf.d/optcurl.conf && ldconfig
  
  
negative.code: 
  ARG BUNDLER_VERSION_ARG=1.17.3
  ARG RUBY_VERSION_ARG=2.2.2
  ARG GOLANG_VERSION_ARG=1.10.3
  ARG TAR_VERSION_ARG=1.23
  ARG GIT_VERSION_ARG=2.7.0
  ARG OPENSSL_VERSION_ARG=1.0.2u
  
  COPY ./CentOS-Base.repo \
       ./libselinux.repo /etc/yum.repos.d/
  