fix: use external searching

.doxyconfig

@@ -0,0 +1 @@
+This is a dummy file, used by CMakeLists.txt

.gitignore

@@ -1,6 +1,16 @@
 # Ignore JetBrains IDE files
 .idea/
 
+# Ignore build directories
+build/
+cmake-build-*/
+
 # npm
 node_modules/
 package-lock.json
+
+# ignore doxyconfig files
+docs/*-doxyconfig*
+
+# ignore fake third-party directory
+third-party/

CMakeLists.txt

@@ -1,3 +1,5 @@
+cmake_minimum_required(VERSION 3.18)
+
 # find doxygen and graphviz
 find_package(Doxygen 1.10 REQUIRED dot)  # debian and ubuntu left in the dust
 
@@ -30,6 +32,12 @@ file(COPY_FILE "${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile" "${SOURCE_DOCS_DIR}/Doxyfi
 file(READ "${SOURCE_DOCS_DIR}/Doxyfile" DOXYFILE_CONTENTS)
 file(APPEND "${SOURCE_DOCS_DIR}/Doxyfile-doxyconfig" "${DOXYFILE_CONTENTS}")
 
+# if this is the doxyconfig project, copy doxygen-awesome-css to third-party
+if(EXISTS "${CMAKE_SOURCE_DIR}/.doxyconfig")
+    file(COPY "${CMAKE_CURRENT_SOURCE_DIR}/doxygen-awesome-css"
+            DESTINATION "${CMAKE_SOURCE_DIR}/third-party/doxyconfig")
+endif()
+
 # sunshine has its own icon and logo
 if(NOT ${CMAKE_PROJECT_NAME} STREQUAL "Sunshine")
     # download icon and logo

Doxyfile

@@ -90,6 +90,12 @@ PREDEFINED += __linux__
 PREDEFINED += __MACH__
 PREDEFINED += _WIN32
 
+# search settings
+SEARCHENGINE = YES
+SERVER_BASED_SEARCH = YES
+EXTERNAL_SEARCH = YES
+SEARCHENGINE_URL = https://readthedocs.org/api/v3/search/
+
 # general settings
 CASE_SENSE_NAMES = YES
 CREATE_SUBDIRS = NO