anchor.diff:      apt install -y vim && \
       mkdir -p $HOME/.cache/dein && \
       curl -L https://raw.githubusercontent.com/Shougo/dein.vim/master/bin/installer.sh > $HOME/installer.sh && \
  -    sh $HOME/installer.sh $HOME/.cache/dein && \
  -    # ------------------
  -    # chsh
  -    # ------------------
  -    chsh -s zsh
  +    sh $HOME/installer.sh $HOME/.cache/dein
   
   # Install dein plugins
   RUN yes | vim -c ":silent call dein#install() | :q"
   
  -# Install zplug plugins
  -RUN zsh -c "source $HOME/.zshrc && zplug install"
  -
  -
   ENV LANG ja_JP.UTF-8
   ENV LANGUAGE ja_JP.UTF-8
   ENV LC_ALL ja_JP.UTF-8
  
positive.code:     # Set links
      ls -a | grep '^\.' | grep -v '^\.git$' | grep -vwF '.' | sed 's/^.*/echo ln -s $(pwd)\/& $HOME\/&/e' | sh && \
      # ------------------
      # Install zplug
      # ------------------
      apt install -y zsh python && \
      export ZPLUG_HOME=$HOME/.zplug && \
      git clone https://github.com/zplug/zplug $ZPLUG_HOME && \
      # ------------------
      # Install universal-ctags
      # ------------------
      # Ref: https://github.com/universal-ctags/ctags/blob/master/docs/autotools.rst
      apt install -y dh-autoreconf pkg-config && \
      git clone https://github.com/universal-ctags/ctags.git $HOME/reps/universal-ctags/ctags && \
      cd $HOME/reps/universal-ctags/ctags && \
  
negative.code:     $HOME/.rbenv/bin/rbenv install 2.3.0 && \
      $HOME/.rbenv/bin/rbenv global 2.3.0 && \
      # ------------------
      # Install zplug
      # ------------------
      apt install -y zsh python && \
      export ZPLUG_HOME=$HOME/.zplug && \
      git clone https://github.com/zplug/zplug $ZPLUG_HOME && \
      # ------------------
      # Set dotfiles
      # ------------------
      mkdir -p $HOME/reps/greymd && \
  