anchor.diff: -# FROM ubuntu:latest
  -# RUN DEBIAN_FRONTEND=noninteractive apt-get -qqy update \
  -#  && DEBIAN_FRONTEND=noninteractive apt-get -qqy install software-properties-common
  -
  -# travis-ci unit tests run using ubuntu:precise, but development is often
  -# far less painful using ubuntu:latest instead. In future we can drop precise.
  -FROM ubuntu:precise
  -RUN DEBIAN_FRONTEND=noninteractive apt-get update -qqy \
  - && DEBIAN_FRONTEND=noninteractive apt-get -qqy install python-software-properties
  +FROM ubuntu:latest
  +RUN DEBIAN_FRONTEND=noninteractive apt-get -qqy update \
  + && DEBIAN_FRONTEND=noninteractive apt-get -qqy install software-properties-common
   
   RUN DEBIAN_FRONTEND=noninteractive add-apt-repository -y ppa:ubuntu-toolchain-r/test
   RUN DEBIAN_FRONTEND=noninteractive apt-get update -qqy \
  
positive.code:         doxygen \
          g++-5 \
          git \
          libmyodbc \
          libsqliteodbc \
          make \
          mysql-client \
          mysql-server \
  
negative.code: # Might not be available, but install it if it is.
  RUN DEBIAN_FRONTEND=noninteractive apt-get -y install jekyll || true
  
  # NOTE: `libmyodbc`, the package for MySQL ODBC support, is no longer available directly via a
  # simple `apt-get install libmyodbc` command. Instead, you must install it manually. The following
  # blog post provides step-by-step instructions.
  # https://www.datasunrise.com/blog/how-to-install-the-mysql-odbc-driver-on-ubuntu-16-04/
  
  RUN odbcinst -i -d -f /usr/share/sqliteodbc/unixodbc.ini
  
  ENV CXX g++-5
  