Allow using system provided json library

CMakeLists.txt

@@ -98,6 +98,7 @@ OPTION(INDI_BUILD_XISF "Build XISF support" ON)
 
 # System provided or bundled libs
 OPTION(INDI_SYSTEM_HTTPLIB "Use system provided httplib" OFF)
+OPTION(INDI_SYSTEM_JSONLIB "Use system provided json library" OFF)
 
 if(UNIX AND NOT APPLE)
     OPTION(INDI_SHARED_MEMORY "Build INDI with support for UNIX protocol with shared memory" ON)
@@ -182,6 +183,18 @@ else()
     message(STATUS "Using bundled httplib")
 endif(INDI_SYSTEM_HTTPLIB)
 
+if(INDI_SYSTEM_JSONLIB)
+    find_package(nlohmann_json REQUIRED)
+    set(SYSTEM_JSONLIB 1)
+    set(JSONLIB nlohmann_json::nlohmann_json)
+    add_definitions(-D_USE_SYSTEM_JSONLIB)
+    message(STATUS "Using system provided Niels Lohmann's json library")
+else(INDI_SYSTEM_JSONLIB)
+    set(SYSTEM_JSONLIB 0)
+    set(JSONLIB "")
+    message(STATUS "Using bundled json library")
+endif(INDI_SYSTEM_JSONLIB)
+
 # ###################################################################################################
 #
 # Component   : INDI Core
@@ -397,7 +410,6 @@ endif()
 # Install common dev files for all except server
 if(INDI_BUILD_DRIVERS OR INDI_BUILD_CLIENT OR INDI_BUILD_QT5_CLIENT)
     install(FILES
-        ${CMAKE_CURRENT_SOURCE_DIR}/libs/json.h
         ${CMAKE_CURRENT_SOURCE_DIR}/libs/inicpp.h
         ${CMAKE_CURRENT_BINARY_DIR}/indiversion.h
         DESTINATION ${INCLUDE_INSTALL_DIR}/libindi COMPONENT Devel
@@ -408,6 +420,12 @@ if(INDI_BUILD_DRIVERS OR INDI_BUILD_CLIENT OR INDI_BUILD_QT5_CLIENT)
             DESTINATION ${INCLUDE_INSTALL_DIR}/libindi COMPONENT Devel
         )
     endif(NOT SYSTEM_HTTPLIB)
+    if(NOT SYSTEM_JSONLIB)
+        install(FILES
+            ${CMAKE_CURRENT_SOURCE_DIR}/libs/indijson.hpp
+            DESTINATION ${INCLUDE_INSTALL_DIR}/libindi COMPONENT Devel
+        )
+    endif(NOT SYSTEM_JSONLIB)
 endif(INDI_BUILD_DRIVERS OR INDI_BUILD_CLIENT OR INDI_BUILD_QT5_CLIENT)
 
 feature_summary(WHAT ALL FATAL_ON_MISSING_REQUIRED_PACKAGES)

drivers/focuser/CMakeLists.txt

@@ -136,7 +136,7 @@ SET(sesto2_SRC
 )
 
 add_executable(indi_sestosenso2_focus ${sesto2_SRC})
-target_link_libraries(indi_sestosenso2_focus indidriver)
+target_link_libraries(indi_sestosenso2_focus indidriver ${JSONLIB})
 install(TARGETS indi_sestosenso2_focus RUNTIME DESTINATION bin)
 
 # ############### Esatto Focuser ################
@@ -146,7 +146,7 @@ SET(esatto_SRC
 )
 
 add_executable(indi_esatto_focus ${esatto_SRC})
-target_link_libraries(indi_esatto_focus indidriver)
+target_link_libraries(indi_esatto_focus indidriver ${JSONLIB})
 install(TARGETS indi_esatto_focus RUNTIME DESTINATION bin)
 
 # ############### Esatto with Arco Focuser ################
@@ -156,7 +156,7 @@ SET(esarc_SRC
 )
 
 add_executable(indi_esattoarco_focus ${esarc_SRC})
-target_link_libraries(indi_esattoarco_focus indidriver)
+target_link_libraries(indi_esattoarco_focus indidriver ${JSONLIB})
 install(TARGETS indi_esattoarco_focus RUNTIME DESTINATION bin)
 
 # ############### Televue FocusMaster ################

drivers/focuser/esattoarco.cpp

@@ -25,7 +25,12 @@
 #include "esattoarco.h"
 
 #include "indicom.h"
-#include "json.h"
+
+#ifdef _USE_SYSTEM_JSONLIB
+#include <nlohmann/json.hpp>
+#else
+#include <indijson.hpp>
+#endif
 
 #include <cmath>
 #include <cstring>

drivers/focuser/primalucacommandset.h

@@ -25,7 +25,12 @@
 #pragma once
 
 #include <cstdint>
-#include "json.h"
+
+#ifdef _USE_SYSTEM_JSONLIB
+#include <nlohmann/json.hpp>
+#else
+#include <indijson.hpp>
+#endif
 
 using json = nlohmann::json;
 

drivers/spectrograph/CMakeLists.txt

@@ -14,7 +14,7 @@ set( shelyak_usis_SRCS
 )
 
 add_executable(shelyak_usis ${shelyak_usis_SRCS})
-target_link_libraries(shelyak_usis indidriver)
+target_link_libraries(shelyak_usis indidriver ${JSONLIB})
 
 install(TARGETS shelyak_usis RUNTIME DESTINATION bin)
 install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/shelyak/shelyak_boards.json DESTINATION ${DATA_INSTALL_DIR})

drivers/spectrograph/shelyak/indi_shelyak_usis.h

@@ -24,7 +24,12 @@
 
 #include "defaultdevice.h"
 #include "connectionplugins/connectionserial.h"
-#include "json.h"
+
+#ifdef _USE_SYSTEM_JSONLIB
+#include <nlohmann/json.hpp>
+#else
+#include <indijson.hpp>
+#endif
 
 using json = nlohmann::json;
 

drivers/weather/CMakeLists.txt

@@ -27,7 +27,7 @@ install(TARGETS indi_watcher_weather RUNTIME DESTINATION bin)
 SET(weathersafetyproxy_SRC
     weather_safety_proxy.cpp)
 add_executable(indi_weather_safety_proxy ${weathersafetyproxy_SRC})
-target_link_libraries(indi_weather_safety_proxy indidriver ${CURL})
+target_link_libraries(indi_weather_safety_proxy indidriver ${CURL} ${JSONLIB})
 install(TARGETS indi_weather_safety_proxy RUNTIME DESTINATION bin)
 
 # ########## MBox Driver ###############
@@ -63,5 +63,5 @@ IF(UNITY_BUILD)
 ENDIF()
 
 add_executable(indi_openweathermap_weather ${OpenWeatherMap_SRC})
-target_link_libraries(indi_openweathermap_weather indidriver ${CURL})
+target_link_libraries(indi_openweathermap_weather indidriver ${CURL} ${JSONLIB})
 install(TARGETS indi_openweathermap_weather RUNTIME DESTINATION bin)

drivers/weather/openweathermap.cpp

@@ -26,7 +26,12 @@
 
 #include "openweathermap.h"
 
-#include "json.h"
+#ifdef _USE_SYSTEM_JSONLIB
+#include <nlohmann/json.hpp>
+#else
+#include <indijson.hpp>
+#endif
+
 #include "locale_compat.h"
 
 #include <curl/curl.h>

drivers/weather/weather_safety_proxy.cpp

@@ -28,7 +28,12 @@
 #include <cstring>
 #include <curl/curl.h>
 
-#include "json.h"
+#ifdef _USE_SYSTEM_JSONLIB
+#include <nlohmann/json.hpp>
+#else
+#include <indijson.hpp>
+#endif
+
 #include "weather_safety_proxy.h"
 
 using json = nlohmann::json;