#!/bin/bash
# Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA

set -e
init_config() {
  mkdir "${CONFDIR}"
  echo "Generating config file in ${CONFFILE}..."
  touch "${CONFFILE}"
  echo "[mysqld]"			>> ${CONFFILE}
  echo "pid-file=${RUNDIR}/mysqld.pid"	>> ${CONFFILE} 
  echo "socket=${RUNDIR}/mysqld.sock"	>> ${CONFFILE}
  echo "datadir=${DATADIR}"		>> ${CONFFILE}
  echo "log-error=${LOGDIR}/error.log"	>> ${CONFFILE}
  echo "secure-file-priv=${FILESDIR}"	>> ${CONFFILE}
  echo "basedir=${BASEDIR}"		>> ${CONFFILE}
  echo "[mysql]"			>> ${CONFFILE}
  echo "socket=${RUNDIR}/mysqld.sock"	>> ${CONFFILE}
  echo "Done"
}

init_database() {
  echo "Initializing new database in ${DATADIR}..."
  mkdir "${DATADIR}"
  mysqld --defaults-file="${CONFFILE}" --initialize
  echo "Done"
  cat ${LOGDIR}/error.log | grep "temporary password"
}

USERID=$(id -u)
if [ "${USERID}" = "0" ];then
  MYSQL_SNAPDIR="${SNAP_COMMON}"
else
  MYSQL_SNAPDIR="${SNAP_USER_COMMON}"
fi
DATADIR="${MYSQL_SNAPDIR}/data"
RUNDIR="${MYSQL_SNAPDIR}/run"
LOGDIR="${MYSQL_SNAPDIR}/log"
CONFDIR="${MYSQL_SNAPDIR}/conf"
CONFFILE="${CONFDIR}/my.cnf"
FILESDIR="${MYSQL_SNAPDIR}/files"
BASEDIR="${SNAP}/usr"

[ -d "${LOGDIR}" ] 		|| mkdir "${LOGDIR}"
[ -f "${LOGDIR}/error.log" ] 	|| touch "${LOGDIR}/error.log"
[ -d "${FILESDIR}" ] 		|| mkdir "${FILESDIR}"
[ -d "${RUNDIR}" ] 		|| mkdir "${RUNDIR}"
[ -d "${CONFDIR}" ] 		|| init_config
[ -d "${DATADIR}" ] 		|| init_database

if [ "${USERID}" = "0" ];
then
  # Ensure mysql user exists and that the correct permissions are set on various directories
  adduser --system --disabled-login --ingroup mysql --home /nonexistent --gecos "MySQL Server" --shell /bin/false mysql >/dev/null
  chown -R mysql:mysql "${LOGDIR}" "${FILESDIR}" "${DATADIR}" "${RUNDIR}"
  chmod 750 "${LOGDIR}" "${DATADIR}"
  chmod 770 "${FILESDIR}"
  chmod 755 "${RUNDIR}"
  VARS="--user=mysql"
fi
echo "Starting server..."
mysqld --defaults-file="${CONFFILE}" ${VARS} $@