anchor.diff:  RUN apt-get update && apt-get install -y perl --no-install-recommends && rm -rf /var/lib/apt/lists/*
   
   # gpg: key 5072E1F5: public key "MySQL Release Engineering <mysql-build@oss.oracle.com>" imported
  -RUN apt-key adv --keyserver pool.sks-keyservers.net --recv-keys A4A9406876FCBD3C456770C88C718D3B5072E1F5
  +RUN apt-key adv --keyserver ha.pool.sks-keyservers.net --recv-keys A4A9406876FCBD3C456770C88C718D3B5072E1F5
   
   ENV MYSQL_MAJOR 5.7
  -ENV MYSQL_VERSION 5.7.7-rc
  +ENV MYSQL_VERSION 5.7.8-rc
   
  -RUN echo "deb http://repo.mysql.com/apt/debian/ wheezy mysql-${MYSQL_MAJOR}-dmr" > /etc/apt/sources.list.d/mysql.list
  +RUN echo "deb http://repo.mysql.com/apt/debian/ jessie mysql-${MYSQL_MAJOR}-dmr" > /etc/apt/sources.list.d/mysql.list
   
   # the "/var/lib/mysql" stuff here is because the mysql-server postinst doesn't have an explicit way to disable the mysql_install_db codepath besides having a database already "configured" (ie, stuff in /var/lib/mysql/mysql)
   # also, we set debconf keys to make APT a little quieter
  
positive.code: 	&& rm -rf /var/lib/mysql && mkdir -p /var/lib/mysql
  
  # comment out a few problematic configuration values
  RUN sed -Ei 's/^(bind-address|log)/#&/' /etc/mysql/my.cnf
  
  VOLUME /var/lib/mysql
  VOLUME /run/mysqld
  
  COPY docker-entrypoint.sh /entrypoint.sh
  ENTRYPOINT ["/entrypoint.sh"]
  
negative.code: FROM debian:jessie
  
  # add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added
  RUN groupadd -r mysql && useradd -r -g mysql mysql
  
  RUN mkdir /docker-entrypoint-initdb.d
  
  # FATAL ERROR: please install the following Perl modules before executing /usr/local/mysql/scripts/mysql_install_db:
  # File::Basename
  