[install] Add missing JSON schemas in install script

Author: c-jimenez

CMakeLists.txt

@@ -104,13 +104,16 @@ include(GNUInstallDirs)
 
 file(GLOB_RECURSE PUBLIC_HEADERS
      LIST_DIRECTORIES false RELATIVE ${CMAKE_SOURCE_DIR} "${CMAKE_SOURCE_DIR}/src/*.h")
+file(GLOB OCPP_SCHEMAS
+     LIST_DIRECTORIES false RELATIVE ${CMAKE_SOURCE_DIR} "${CMAKE_SOURCE_DIR}/schemas/*.json")
 
 install(TARGETS open-ocpp-dynamic ${OPEN_OCPP_STATIC_TARGET}
         RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
         LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
         ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
 )
 install(FILES ${PUBLIC_HEADERS} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/openocpp)
+install(FILES ${OCPP_SCHEMAS} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/openocpp/schemas)
 
 file(GLOB RAPIDJSON_HEADERS
      LIST_DIRECTORIES false RELATIVE ${CMAKE_SOURCE_DIR} "${CMAKE_SOURCE_DIR}/3rdparty/rapidjson/include/rapidjson/*.h")

README.md

@@ -338,13 +338,15 @@ The build generates 2 flavors of the **Open OCPP** library depending on the need
 
 ```cmake --install [build_dir] --strip```
 
-The makefile contains helper targets which can be called if the installation needs to be done in a non standard directory using the variable INSTALL_PREFIX :
+The makefile contains helper targets which can be called if the installation needs to be done in a non standard directory using the variable *INSTALL_PREFIX* :
 
 ```make install-gcc-native INSTALL_PREFIX=/your/directory``` or ```make install-clang-native INSTALL_PREFIX=/your/directory```
 
-If run without the INSTALL_PREFIX variable, it will install in the standard system directories.
+If run without the *INSTALL_PREFIX* variable, it will install in the standard system directories.
 
-**Note**: If INSTALL_PREFIX is used, it must also be defined when building the project with the makefile helper targets.
+**Note**: If *INSTALL_PREFIX* is used, it must also be defined when building the project with the makefile helper targets.
+
+**Open OCPP** needs the JSON schemas of the OCPP messages during execution. The schemas are installed in the : *INSTALL_DIR*/include/openocpp/schemas directory where *INSTALL_DIR* can be either the standard system directories or the custom directory specified by *INSTALL_PREFIX*.
 
 ### Use with CMake