CMake: Add option ENABLE_SYSTEM_YYJSON

Fix: #525

CMakeLists.txt

@@ -69,6 +69,7 @@ cmake_dependent_option(ENABLE_PULSE "Enable pulse" ON "LINUX OR BSD" OFF)
 cmake_dependent_option(ENABLE_DDCUTIL "Enable ddcutil" ON "LINUX" OFF)
 cmake_dependent_option(ENABLE_THREADS "Enable multithreading" ON "Threads_FOUND" OFF)
 cmake_dependent_option(ENABLE_PCI_MEMORY "Enable detecting GPU memory size with libpci" OFF "LINUX OR BSD" OFF)
+cmake_dependent_option(ENABLE_SYSTEM_YYJSON "Use system provided (instead of fastfetch embeded) yyjson library" OFF "LINUX OR APPLE OR BSD OR WIN32 OR ANDROID" OFF)
 
 option(BUILD_TESTS "Build tests" OFF) # Also create test executables
 option(SET_TWEAK "Add tweak to project version" ON) # This is set to off by github actions for release builds
@@ -251,7 +252,6 @@ file(GENERATE OUTPUT logo_builtin.h CONTENT "${LOGO_BUILTIN_H}")
 #######################
 
 set(LIBFASTFETCH_SRC
-    src/3rdparty/yyjson/yyjson.c
     src/common/bar.c
     src/common/commandoption.c
     src/common/font.c
@@ -605,9 +605,26 @@ if(NOT HAVE_WCWIDTH)
     list(APPEND LIBFASTFETCH_SRC src/3rdparty/mk_wcwidch/wcwidth.c)
 endif()
 
+if(ENABLE_SYSTEM_YYJSON)
+    find_package(yyjson)
+    if(yyjson_FOUND)
+        message(STATUS "System provided yyjson is used")
+    else()
+        message(FATAL_ERROR "ENABLE_SYSTEM_YYJSON is set but system provided yyjson is not found")
+    endif()
+else()
+    list(APPEND LIBFASTFETCH_SRC
+        src/3rdparty/yyjson/yyjson.c
+    )
+endif()
+
 add_library(libfastfetch OBJECT
     ${LIBFASTFETCH_SRC}
 )
+if(yyjson_FOUND)
+    target_compile_definitions(libfastfetch PRIVATE FF_USE_SYSTEM_YYJSON)
+    target_link_libraries(libfastfetch PRIVATE yyjson)
+endif()
 
 target_compile_definitions(libfastfetch PUBLIC _GNU_SOURCE _XOPEN_SOURCE)
 if(WIN32)

src/common/option.h

@@ -1,14 +1,15 @@
 #pragma once
 
 #include "util/FFstrbuf.h"
-#include "3rdparty/yyjson/yyjson.h"
+
+struct yyjson_val;
 
 // Must be the first field of FFModuleOptions
 typedef struct FFModuleBaseInfo
 {
     const char* name;
     bool (*parseCommandOptions)(void* options, const char* key, const char* value);
-    void (*parseJsonObject)(void* options, yyjson_val *module);
+    void (*parseJsonObject)(void* options, struct yyjson_val *module);
     void (*printModule)(void* options);
 } FFModuleBaseInfo;
 

src/fastfetch.h

@@ -8,7 +8,11 @@
 #include <stdint.h>
 #include <stdbool.h>
 
-#include "3rdparty/yyjson/yyjson.h"
+#ifdef FF_USE_SYSTEM_YYJSON
+    #include <yyjson.h>
+#else
+    #include "3rdparty/yyjson/yyjson.h"
+#endif
 
 #include "util/FFstrbuf.h"
 #include "util/FFlist.h"