anchor.diff:  ENV	PATH /usr/local/go/bin:$PATH
   
   # build tip into go-tip, using current release as bootstrap
  -ENV	_DKR_BUMP 4
   RUN	cd /usr/local/go-tip/src \
   &&	git checkout master \
   &&	git pull \
  
positive.code: &&	rm -rf /var/lib/apt/lists/* \
  ENV	LANG=en_US.UTF-8
  
  ENV	_DKR_ANTLR_VERSION 4.7
  RUN	git clone --depth=1 --branch $_DKR_ANTLR_VERSION https://github.com/antlr/antlr4.git /tmp/antlr \
  &&	( cd /tmp/antlr/tool && mvn package -DskipTests ) \
  &&	cp /tmp/antlr/tool/target/antlr4-4.6-complete.jar /usr/local/lib/ \
  &&	rm -rf /tmp/antlr /root/.m2
  ENV	CLASSPATH .:/usr/local/lib/antlr4-4.6-complete.jar
  
  ENV	_DKR_PROTOBUF_VERSION v3.4.1
  RUN	git clone --depth=1 https://github.com/google/protobuf --branch $_DKR_PROTOBUF_VERSION /tmp/protobuf \
  &&	cd /tmp/protobuf \
  &&	./autogen.sh \
  
negative.code: &&	update-alternatives --set vi /usr/local/bin/vim
  ENV	EDITOR vim
  
  ARG	_DKR_VIMGO_VERSION=v1.15
  RUN	mkdir -p /etc/skel/.vim/autoload \
  &&	mkdir -p /etc/skel/.vim/bundle \
  &&	curl -LSso /etc/skel/.vim/autoload/pathogen.vim https://tpo.pe/pathogen.vim \
  