nlohmann

conf/cmake/Findnlohmann_json.cmake

@@ -0,0 +1,45 @@
+include(FindPackageHandleStandardArgs)
+
+# Look for the header file.
+find_path(NLOHMANN_JSON_INCLUDE_DIR
+    NAMES
+        nlohmann/json.hpp
+    HINTS
+        "${NLOHMANN_JSON_LOCATION}/include"
+        "$ENV{NLOHMANN_JSON_LOCATION}/include"
+    PATHS
+        "$ENV{PROGRAMFILES}/nlohmann/include"
+        "$ENV{PROGRAMFILES}/nlohmann/json/include"
+        "$ENV{PROGRAMFILES}/nlohmann_json/include"
+        /usr/include/
+        /usr/local/include/
+        /opt/local/include/
+        /sw/include/
+    DOC
+        "The directory where headers files of nlohmann_json resides")
+mark_as_advanced(NLOHMANN_JSON_INCLUDE_DIR)
+
+if (NLOHMANN_JSON_INCLUDE_DIR)
+    # Tease the NLOHMANN_JSON_VERSION numbers from the lib headers
+    include(utils/ParseVersion)
+
+    parse_version(${NLOHMANN_JSON_INCLUDE_DIR} nlohmann/json.hpp NLOHMANN_JSON_VERSION_MAJOR)
+    parse_version(${NLOHMANN_JSON_INCLUDE_DIR} nlohmann/json.hpp NLOHMANN_JSON_VERSION_MINOR)
+    parse_version(${NLOHMANN_JSON_INCLUDE_DIR} nlohmann/json.hpp NLOHMANN_JSON_VERSION_PATCH)
+
+    set(NLOHMANN_JSON_VERSION "${NLOHMANN_JSON_VERSION_MAJOR}.${NLOHMANN_JSON_VERSION_MINOR}.${NLOHMANN_JSON_VERSION_PATCH}")
+endif (NLOHMANN_JSON_INCLUDE_DIR)
+
+find_package_handle_standard_args(nlohmann_json
+    REQUIRED_VARS NLOHMANN_JSON_INCLUDE_DIR
+    VERSION_VAR NLOHMANN_JSON_VERSION)
+
+if (nlohmann_json_FOUND)
+  set(NLOHMANN_JSON_INCLUDE_DIRS ${NLOHMANN_JSON_INCLUDE_DIR})
+
+  if (NOT TARGET nlohmann::json)
+    add_library(nlohmann::json UNKNOWN IMPORTED)
+    set_target_properties(nlohmann::json PROPERTIES
+      INTERFACE_INCLUDE_DIRECTORIES "${NLOHMANN_JSON_INCLUDE_DIRS}")
+  endif ()
+endif ()