MDEV-14560 Extra engines enabled through additional config are not loaded on first installation

RPM solution:

Make all server plugins to restart the server when installed.
To avoid multiple server restarts, do it only once in posttrans scriptlet.
Add support for CPACK_RPM_<component>_POST_TRANS_SCRIPT_FILE

cmake/CPackRPM.cmake

@@ -2,6 +2,11 @@
 # Wrapper for CPackRPM.cmake
 #
 
+#
+# Support for per-component LICENSE and VENDOR
+#
+# per component values, if present, are copied into global CPACK_RPM_PACKAGE_xxx
+#
 macro(set_from_component WHAT)
   set(orig_CPACK_RPM_PACKAGE_${WHAT} ${CPACK_RPM_PACKAGE_${WHAT}})
   if(CPACK_RPM_${CPACK_RPM_PACKAGE_COMPONENT}_PACKAGE_${WHAT})
@@ -15,6 +20,33 @@ endmacro()
 set_from_component(LICENSE)
 set_from_component(VENDOR)
 
+#
+# Support for the %posttrans scriptlet
+#
+# the scriptlet, if present, is appended (together with the %posttrans tag)
+# to the pre-uninstall scriptlet
+#
+set(base_time "PRE")
+set(base_type "UNINSTALL")
+set(base_var CPACK_RPM_${CPACK_RPM_PACKAGE_COMPONENT}_${base_time}_${base_type}_SCRIPT_FILE)
+set(acc)
+
+macro(read_one_file time_ type_ tag_)
+  set(var CPACK_RPM_${CPACK_RPM_PACKAGE_COMPONENT}_${time_}_${type_}_SCRIPT_FILE)
+  if (${var})
+    file(READ ${${var}} content)
+    set(acc "${tag_}\n${content}\n\n${acc}")
+  endif()
+endmacro()
+
+read_one_file("POST" "TRANS" "%posttrans")
+if (acc)
+  set(orig_${base_var} ${${base_var}})
+  read_one_file(${base_time} ${base_type} "")
+  set(${base_var} ${CPACK_TOPLEVEL_DIRECTORY}/SPECS/${CPACK_RPM_PACKAGE_COMPONENT}_${base_time}_${base_type}.scriptlet)
+  file(WRITE ${${base_var}} "${acc}")
+endif()
+
 # load the original CPackRPM.cmake
 set(orig_CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH})
 unset(CMAKE_MODULE_PATH)
@@ -23,10 +55,10 @@ set(CMAKE_MODULE_PATH ${orig_CMAKE_MODULE_PATH})
 
 restore(LICENSE)
 restore(VENDOR)
+set(${base_var} ${orig_${base_var}})
 
 # per-component cleanup
 foreach(_RPM_SPEC_HEADER URL REQUIRES SUGGESTS PROVIDES OBSOLETES PREFIX CONFLICTS AUTOPROV AUTOREQ AUTOREQPROV)
   unset(TMP_RPM_${_RPM_SPEC_HEADER})
   unset(CPACK_RPM_PACKAGE_${_RPM_SPEC_HEADER}_TMP)
 endforeach()
-

cmake/cpack_rpm.cmake

@@ -81,6 +81,7 @@ SET(CPACK_RPM_SPEC_MORE_DEFINE "
 %define _bindir     ${INSTALL_BINDIRABS}
 %define _sbindir    ${INSTALL_SBINDIRABS}
 %define _sysconfdir ${INSTALL_SYSCONFDIR}
+%define restart_flag %{_localstatedir}/lib/rpm-state/mariadb-restart
 ")
 
 # this creative hack is described here: http://www.cmake.org/pipermail/cmake/2012-January/048416.html
@@ -179,6 +180,7 @@ SET(CPACK_RPM_server_PRE_INSTALL_SCRIPT_FILE ${CMAKE_SOURCE_DIR}/support-files/r
 SET(CPACK_RPM_server_PRE_UNINSTALL_SCRIPT_FILE ${CMAKE_SOURCE_DIR}/support-files/rpm/server-preun.sh)
 SET(CPACK_RPM_server_POST_INSTALL_SCRIPT_FILE ${CMAKE_SOURCE_DIR}/support-files/rpm/server-postin.sh)
 SET(CPACK_RPM_server_POST_UNINSTALL_SCRIPT_FILE ${CMAKE_SOURCE_DIR}/support-files/rpm/server-postun.sh)
+SET(CPACK_RPM_server_POST_TRANS_SCRIPT_FILE ${CMAKE_SOURCE_DIR}/support-files/rpm/server-posttrans.sh)
 SET(CPACK_RPM_shared_POST_INSTALL_SCRIPT_FILE ${CMAKE_SOURCE_DIR}/support-files/rpm/shared-post.sh)
 SET(CPACK_RPM_shared_POST_UNINSTALL_SCRIPT_FILE ${CMAKE_SOURCE_DIR}/support-files/rpm/shared-post.sh)
 SET(CPACK_RPM_compat_POST_INSTALL_SCRIPT_FILE ${CMAKE_SOURCE_DIR}/support-files/rpm/shared-post.sh)

cmake/plugin.cmake

@@ -243,6 +243,8 @@ MACRO(MYSQL_ADD_PLUGIN)
           ENDIF()
           INSTALL(FILES ${ARG_CONFIG} COMPONENT ${ARG_COMPONENT} DESTINATION ${INSTALL_SYSCONF2DIR})
           SET(CPACK_RPM_${ARG_COMPONENT}_USER_FILELIST ${ignored} "%config(noreplace) ${INSTALL_SYSCONF2DIR}/*" PARENT_SCOPE)
+          SET(CPACK_RPM_${ARG_COMPONENT}_POST_INSTALL_SCRIPT_FILE ${CMAKE_SOURCE_DIR}/support-files/rpm/plugin-postin.sh PARENT_SCOPE)
+          SET(CPACK_RPM_${ARG_COMPONENT}_POST_TRANS_SCRIPT_FILE ${CMAKE_SOURCE_DIR}/support-files/rpm/server-posttrans.sh PARENT_SCOPE)
         ENDIF()
       ENDIF()
     ELSE()

support-files/rpm/plugin-postin.sh

+# request the server restart
+echo > %{restart_flag}

support-files/rpm/server-posttrans.sh

+if [ -r %{restart_flag} ] ; then
+  rm %{restart_flag}
+  if [ -x /usr/bin/systemctl ] ; then
+    /usr/bin/systemctl daemon-reload > /dev/null 2>&1
+  fi
+
+  # only restart the server if it was alredy running
+  if %{_sysconfdir}/init.d/mysql status > /dev/null 2>&1; then
+    %{_sysconfdir}/init.d/mysql restart
+  fi
+fi

support-files/rpm/server-postun.sh

 if [ $1 -ge 1 ]; then
-  if [ -x %{_sysconfdir}/init.d/mysql ] ; then
-    # only restart the server if it was alredy running
-    if %{_sysconfdir}/init.d/mysql status > /dev/null 2>&1; then
-      %{_sysconfdir}/init.d/mysql restart
-    fi
-  fi
+  # request the server restart
+  echo > %{restart_flag}
 fi
 
 if [ $1 = 0 ] ; then