update galera_new_cluster to use environment file

Now that the systemd unit files use an environment file to pass
_WSREP_START_POSITION we have to update galera_new_cluster as well.

scripts/CMakeLists.txt

@@ -190,6 +190,9 @@ ELSE()
   SET(localstatedir ${MYSQL_DATADIR})
 ENDIF()
 
+get_filename_component(MYSQL_UNIX_DIR ${MYSQL_UNIX_ADDR} DIRECTORY)
+SET(mysqlunixdir ${MYSQL_UNIX_DIR})
+
 SET(resolveip_locations "$basedir/${INSTALL_BINDIR} $basedir/bin")
 SET(mysqld_locations "$basedir/${INSTALL_SBINDIR} $basedir/libexec $basedir/sbin $basedir/bin")
 SET(errmsg_locations "$basedir/${INSTALL_MYSQLSHAREDIR}/english $basedir/share/english $basedir/share/mysql/english")
@@ -207,6 +210,18 @@ INSTALL_SCRIPT(
   DESTINATION ${INSTALL_SCRIPTDIR}
   COMPONENT Server
   )
+
+CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/galera_new_cluster.sh
+  ${CMAKE_CURRENT_BINARY_DIR}/galera_new_cluster ESCAPE_QUOTES @ONLY)
+  EXECUTE_PROCESS(
+  COMMAND chmod +x ${CMAKE_CURRENT_BINARY_DIR}/galera_new_cluster
+  )
+
+INSTALL_SCRIPT(
+ "${CMAKE_CURRENT_BINARY_DIR}/galera_new_cluster"
+  DESTINATION ${INSTALL_SCRIPTDIR}
+  COMPONENT Server
+  )
 ENDIF()
 
 SET(prefix "${CMAKE_INSTALL_PREFIX}")

scripts/galera_new_cluster.sh

@@ -21,11 +21,11 @@ EOF
     exit 0
 fi
 
-systemctl set-environment _WSREP_NEW_CLUSTER='--wsrep-new-cluster' && \
+echo _WSREP_NEW_CLUSTER='--wsrep-new-cluster' > @mysqlunixdir@/"wsrep-new-cluster-${1:-mariadb}" && \
     systemctl restart ${1:-mariadb}
 
 extcode=$?
 
-systemctl set-environment _WSREP_NEW_CLUSTER=''
+rm -f @mysqlunixdir@/"wsrep-new-cluster-${1:-mariadb}"
 
 exit $extcode

support-files/mariadb.service.in

@@ -70,6 +70,9 @@ ProtectSystem=full
 # Prevent accessing /home, /root and /run/user
 ProtectHome=true
 
+# Use an environment file to pass variable _WSREP_NEW_CLUSTER
+EnvironmentFile=-@mysqlunixdir@/wsrep-new-cluster-%N
+
 # Use an environment file to pass variable _WSREP_START_POSITION
 EnvironmentFile=-@mysqlunixdir@/wsrep-start-position