anchor.diff:  FROM debian:jessie
  -
  -# References
  -# https://www.varnish-cache.org/docs/3.0/installation/install.html#configuring-and-compiling
  -# http://blog.tenya.me/blog/2013/10/25/geoip-with-varnish/
   
   RUN apt-get update && apt-get install -y \
           apt-transport-https \
  
positive.code:     && make install
  
  
  RUN curl -SLO "https://github.com/varnish/libvmod-digest/archive/libvmod-digest-$VMOD_DIGEST_VERSION.tar.gz" \
      && mkdir -p /usr/local/libvmod-digest \
      && tar -xzvf "libvmod-digest-$VMOD_DIGEST_VERSION.tar.gz" -C /usr/local/libvmod-digest --strip-components=1 \
      && cd /usr/local/libvmod-digest \
      && ./autogen.sh \
      && ./configure VARNISHSRC=/usr/src/varnish-cache/ \
      && make \
      && make install
  
  RUN curl -SLO "https://github.com/varnish/varnish-modules/archive/varnish-modules-$VMOD_MODULES_VERSION.tar.gz" \
      && mkdir -p /usr/local/varnish-modules \
      && tar -xzvf "varnish-modules-$VMOD_MODULES_VERSION.tar.gz" -C /usr/local/varnish-modules --strip-components=1 \
      && cd /usr/local/varnish-modules \
      && ./bootstrap \
      && ./configure VARNISHSRC=/usr/src/varnish-cache/ \
      && make \
      && make install
  
  RUN mkdir -p /usr/local/libvmod-geoip \
      && git clone https://github.com/asvinours/libvmod-geoip.git /usr/local/libvmod-geoip \
      && cd /usr/local/libvmod-geoip \
      && ./autogen.sh \
      && ./configure VARNISHSRC=/usr/src/varnish-cache/ \
      && make \
      && make install
  
negative.code:         tar
  
  ENV VARNISH_VERSION 4.1.4
  ENV VMOD_MODULES_VERSION 0.11.0
  
  RUN curl -SLO "https://github.com/varnishcache/varnish-cache/archive/varnish-$VARNISH_VERSION.tar.gz" \
      && mkdir -p /usr/local/varnish-cache \
  