anchor.diff:  
   # Base image for all Discourse related processes.
   
  +# NOTE to dev: do not have too many RUN commands; see
  +# https://github.com/dotcloud/docker/issues/1171
  +
  +
   FROM ubuntu:12.04
   MAINTAINER srid
   
  -RUN apt-get -qy update
  +ENV DISCOURSE_VERSION 0.9.6.2
   
  -RUN apt-get -qy install git 
  +RUN apt-get -qy update && apt-get -qy install git 
   
   # Get discourse stable tag
  -RUN git clone --depth 1 https://github.com/discourse/discourse.git
  -RUN cd discourse && git checkout v0.9.6.1
  +RUN git clone --depth 1 https://github.com/discourse/discourse.git && cd discourse && git checkout v$DISCOURSE_VERSION
   
   # We don't care about having .git on an ephemeral filesystem.
   RUN rm -rf .git
  
positive.code: 
  ADD	. /discourse/docker/
  RUN	chmod +x /discourse/docker/*
  RUN     ls -l /discourse/
  # EXPOSE :3000
  
negative.code: # https://github.com/discourse/discourse/blob/master/docs/INSTALL-ubuntu.md
  #
  
  RUN echo "deb http://archive.ubuntu.com/ubuntu precise main universe" > /etc/apt/sources.list && apt-get -qy update
  RUN apt-get -qy install build-essential libssl-dev libyaml-dev git libtool libxslt-dev libxml2-dev libpq-dev gawk curl pngcrush imagemagick python-software-properties
  
  # Discourse setup
  #
  