Added ability to build with packaged version of cpp-httplib.

Signed-off-by: Vitaly Zaitsev <vitaly@easycoding.org>

CMakeLists.txt

@@ -62,6 +62,7 @@ option(USE_BUNDLED_COEURL "Use a bundled version of the Curl wrapper"
 option(USE_BUNDLED_LIBEVENT "Use the bundled version of libevent." ${HUNTER_ENABLED})
 option(USE_BUNDLED_LIBCURL "Use the bundled version of libcurl." ${HUNTER_ENABLED})
 option(USE_BUNDLED_RE2 "Use the bundled version of re2." ${HUNTER_ENABLED})
+option(USE_BUNDLED_CPPHTTPLIB "Use the bundled version of cpp-httplib." ON)
 
 include(CMakeDependentOption)
 set(VOIP_DEFAULT ON)
@@ -697,14 +698,21 @@ else()
 	endif()
 endif()
 
-target_include_directories(nheko PRIVATE src includes third_party/blurhash third_party/cpp-httplib-0.5.12)
+target_include_directories(nheko PRIVATE src includes third_party/blurhash)
 set(THIRD_PARTY_SRC_FILES
 	third_party/blurhash/blurhash.cpp
 	third_party/blurhash/blurhash.hpp
-	third_party/cpp-httplib-0.5.12/httplib.h
 	)
 target_sources(nheko PRIVATE ${THIRD_PARTY_SRC_FILES})
 
+if (USE_BUNDLED_CPPHTTPLIB)
+	target_include_directories(nheko PRIVATE third_party/cpp-httplib-0.5.12)
+	target_sources(nheko PRIVATE third_party/cpp-httplib-0.5.12/httplib.h)
+else()
+	find_package(httplib REQUIRED)
+	target_link_libraries(nheko PRIVATE httplib::httplib)
+endif()
+
 # Fixup bundled keychain include dirs
 if (USE_BUNDLED_QTKEYCHAIN)
 	target_include_directories(nheko PRIVATE ${qt5keychain_SOURCE_DIR} ${qt5keychain_BINARY_DIR})