makes rapidjson dependency managed at cmake level, which will make it…

… more portable on different servers (contrary to boost, likely uninstalled)

epik/CMakeLists.txt

@@ -16,7 +16,8 @@ if (NOT DEFINED ENABLE_AVX512)
     set(ENABLE_AVX512 OFF)
 endif()
 
-find_package(RapidJSON REQUIRED)
+#find_package(RapidJSON REQUIRED)
+
 find_package(Boost REQUIRED COMPONENTS filesystem)
 
 if(ENABLE_OMP)
@@ -44,7 +45,7 @@ else()
     message(STATUS "EPIK: Vectorization DISABLED")
 endif()
 
-message(STATUS "RapidJSON: " ${RAPIDJSON_INCLUDE_DIRS})
+message(STATUS "RapidJSON: " ${RAPIDJSON_INCLUDE_DIRS} ${RapidJSON_INCLUDE_DIR})
 # RapidJSON cmake scripts are different between versions
 set(RapidJSON_INCLUDES ${RAPIDJSON_INCLUDE_DIRS} ${RapidJSON_INCLUDE_DIR})
 

epik/rapidjson.cmake

@@ -0,0 +1,22 @@
+include(ExternalProject)
+
+# Download RapidJSON
+ExternalProject_Add(
+    rapidjson
+    PREFIX "rapidjson"
+    GIT_REPOSITORY "https://github.com/Tencent/rapidjson.git"
+    GIT_TAG f54b0e47a08782a6131cc3d60f94d038fa6e0a51
+    TIMEOUT 10
+    CMAKE_ARGS
+        -DRAPIDJSON_BUILD_TESTS=OFF
+        -DRAPIDJSON_BUILD_DOC=OFF
+        -DRAPIDJSON_BUILD_EXAMPLES=OFF
+    CONFIGURE_COMMAND ""
+    BUILD_COMMAND ""
+    INSTALL_COMMAND ""
+    UPDATE_COMMAND ""
+)
+
+# Prepare RapidJSON (RapidJSON is a header-only library)
+ExternalProject_Get_Property(rapidjson source_dir)
+set(RAPIDJSON_INCLUDE_DIRS ${source_dir}/include)