anchor.diff:  # cache for this RUN command whenever we want to update this repo.
   RUN git clone https://github.com/themattrix/home.git \
       && cd /home \
  -    && git checkout 1cbed08
  +    && git checkout e871fd5
   
   # Set locale
   RUN locale-gen en_US.UTF-8 && /usr/sbin/update-locale LANG=en_US.UTF-8
   
   RUN echo 'source ~/.bashrc' >> /home/.bash_profile
   
  -RUN gem install tomdoc rdoc && gem install lolcat travis
  +RUN gem2.0 install lolcat && gem2.0 install travis -v 1.7.6 --no-rdoc --no-ri
   
   # docker: "The open-source application container engine"
   RUN wget -O /usr/local/bin/docker https://get.docker.com/builds/Linux/x86_64/docker-1.6.0 \
  
positive.code: RUN apt-get update \
      && apt-get -y install \
          iptables ca-certificates lxc apt-transport-https \
          tmux git vim htop socat man ruby ruby1.9.1-dev \
          bash-completion curl python-pygments vim-youcompleteme \
          python-pip sshfs \
      && apt-get clean \
      && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
  
  
negative.code: 
  # Fuzzy history utility. Seems nicer than hh.
  RUN git clone https://github.com/junegunn/fzf.git /home/.fzf \
      && (cd /home/.fzf && git checkout 0.9.11) \
      && (yes | /home/.fzf/install)
  
  RUN wget -O - https://storage.googleapis.com/golang/go1.4.2.linux-amd64.tar.gz | \
      tar -C /usr/local -xz
  
  # percol: "adds flavor of interactive filtering to the traditional pipe concept of UNIX shell"
  # eg: "Useful examples at the command line"
  # thefuck: "Magnificent app which corrects your previous console command"
  RUN pip install percol==0.1.0 eg==0.1.0 thefuck==1.38
  
  # PathPicker, kinda like percol but better for output containing paths.
  RUN git clone https://github.com/facebook/PathPicker.git /home/.pathpicker \
      && cd /home/.pathpicker \
      && git checkout 0.5.5 \
      && chmod +x fpp \
      && ln /home/.pathpicker/fpp /usr/local/bin/fpp
  
  ADD https://raw.githubusercontent.com/junegunn/vim-plug/0.7.1/plug.vim \
      /home/.vim/autoload/plug.vim
  