anchor.diff:      perl && \
     rm -rf /var/cache/apk/*
   
  +# Install plugin
   COPY pkg/drone-chef-0.0.0.gem /tmp/
  -
   RUN gem install --no-ri --no-rdoc --local \
     /tmp/drone-chef-0.0.0.gem
   
  
positive.code:     ca-certificates \
      git \
      ruby && \
    rm -rf /var/cache/apk/*
  
  # Install gems
  RUN apk update && \
    apk add \
      ruby-dev \
  
negative.code:     perl \
      libffi-dev \
      bash && \
    # Required for bundler
    gem install --no-ri --no-rdoc \
      io-console --version '~> 0.4' && \
    bundle install --without development test && \
    apk del \
      ruby-dev \
      build-base \
  