anchor.diff:  FROM ubuntu:18.04 AS base
   MAINTAINER vgteam
   
  +RUN echo base > /stage.txt
  +
  +WORKDIR /vg
  +
  +RUN ls -lah /vg || echo "No vg directory exists yet"
  +
   FROM base AS build
   
  +RUN echo build > /stage.txt
  +
  +RUN ls -lah /vg || echo "No vg directory exists yet"
  +
   # Copy vg build tree into place
  -ADD . /vg
  -WORKDIR /vg
  +COPY * /vg/
  +
  +RUN ls -lah /vg || echo "No vg directory exists yet"
   
   # Install the base packages needed to let vg install packages.
   # Make sure this runs after vg sources are imported so vg will always have an
  
positive.code: ############################################################################################
  FROM base AS run
  
  COPY --from=build /vg/bin/vg /vg/bin/vg
  COPY --from=build /vg/scripts /vg/scripts
  
  # Install packages which toil-vg needs to be available inside the image, for pipes
  # TODO: which of these can be removed?
  # Make sure to clean so we don't ship old apt package indexes in our Docker.
  RUN apt-get -qq -y update && \
      apt-get -qq -y upgrade && \
      apt-get -qq -y install \
      curl \
  
negative.code:     fontconfig-config \
      && apt-get -qq -y clean
  
  
  ENV PATH /vg/bin:$PATH
  
  
  