post_install() {
  groupadd zotonic
  useradd -r -g zotonic -d /var/lib/zotonic zotonic
  chown -R root:zotonic /etc/zotonic
  chown -R zotonic:zotonic /var/lib/zotonic
  chown -R zotonic:zotonic /var/log/zotonic
  echo "###########################################"
  echo "# - Edit /etc/zotonic/config to configure #"
  echo "#   Zotonic.                              #"
  echo "# - Setup sites in /var/lib/zotonic/priv. #"
  echo "# - Apply necessary modifications to      #"
  echo "#   Postgresql's configuration and any    #"
  echo "#   other package you want to interact    #"
  echo "#   with Zotonic.                         #"
  echo "# - Visit to http://zotonic.com for more  #"
  echo "#   details on these tasks.               #"
  echo "###########################################"
  echo "# Zotonic might take a lot of time on its #"
  echo "# first run, as it will generate the      #"
  echo "# Erlang byte-code from source.           #"
  echo "###########################################"
}

post_remove() {
  rm -rf /var/{lib,log}/zotonic
  userdel zotonic
  groupdel zotonic
}