#!{{ dash_location }}

# DO NOT RUN THIS SCRIPT ON PRODUCTION INSTANCE
# OR MYSQL DATA WILL BE ERASED.

# This script will import the dump of the mysql database to the real
# database. It is launched by the clone (importer) instance of webrunner
# in the end of the import script.

# Depending on the output, it will create a file containing
# the status of the restoration (success or failure)

mysql_executable="${mariadb-instance:mysql-binary}"
mysqldump_executable="${binary-wrap-mysqldump:wrapper-path}"
mariadb_data_directory="${directory:mariadb-data}"
mariadb_backup_directory="${directory:mariadb-backup-full}"
instance_directory="${buildout:directory}"
pid_file="${mariadb-instance:pid-file}"
binlog_path="${mariadb-instance:binlog-path}"

# Make sure mariadb is not already running
if [ -e "$pid_file" ]; then
  pid=$(cat $pid_file) > /dev/null 2>&1
  if kill -0 "$pid"; then
    echo "Mariadb is already running with pid $pid. Aborting."
    exit 1
  fi
fi

echo "Deleting existing database..."
rm -r $mariadb_data_directory/*

echo "Adapting binlog database to new paths..."
new_binlog_directory="$(dirname $binlog_path)"
binlog_index_file="$new_binlog_directory/binlog.index"
old_binlog_directory="$(dirname $(head -n 1 $binlog_index_file))"
sed -e "s|$old_binlog_directory|$new_binlog_directory|g" $binlog_index_file > $binlog_index_file

echo "Starting mariadb..."
# XXX hardcoded
$instance_directory/etc/run/mariadb &
mysqld_pid=$!
trap "kill $mysqld_pid" EXIT TERM INT
sleep 30
# If mysql has stopped, abort
if ! [ -d /proc/$mysql_pid ]; then
  exit 1
fi
$instance_directory/etc/run/mariadb_update

echo "Importing data..."
# Use latest dump XXX can contain funny characters
dump=$(ls -r $mariadb_backup_directory | head -1)
zcat "$mariadb_backup_directory/$dump" | $mysql_executable -u root --socket="$instance_directory/var/run/mariadb.sock"
RESTORE_EXIT_CODE=$?

if [ $RESTORE_EXIT_CODE -eq 0 ]; then
  echo 'Backup restoration successfully completed.'
else
  echo 'Backup restoration failed.'
fi

exit $RESTORE_EXIT_CODE
