From 0ce956ba000031c202a1ba296264d71009ce6934 Mon Sep 17 00:00:00 2001
From: Castor215 <132155746+Castor215@users.noreply.github.com>
Date: Wed, 4 Oct 2023 14:41:13 +0100
Subject: [PATCH] externals: allow users to use system cpp-httplib (#7034)

---
 CMakeLists.txt                            |  1 +
 externals/CMakeLists.txt                  |  7 ++++-
 externals/cmake-modules/FindCppHttp.cmake | 35 +++++++++++++++++++++++
 3 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100644 externals/cmake-modules/FindCppHttp.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 23f2a1f40..1e27b1caf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -95,6 +95,7 @@ option(USE_SYSTEM_OPENSSL "Use the system OpenSSL libs (instead of the bundled L
 option(USE_SYSTEM_LIBUSB "Use the system libusb (instead of the bundled libusb)" OFF)
 option(USE_SYSTEM_CPP_JWT "Use the system cpp-jwt (instead of the bundled one)" OFF)
 option(USE_SYSTEM_SOUNDTOUCH "Use the system SoundTouch (instead of the bundled one)" OFF)
+option(USE_SYSTEM_CPP_HTTPLIB "Use the system cpp-httplib (instead of the bundled one)" OFF)
 
 if (CITRA_USE_PRECOMPILED_HEADERS)
     message(STATUS "Using Precompiled Headers.")
diff --git a/externals/CMakeLists.txt b/externals/CMakeLists.txt
index b81b3fe9b..7e3a0e7d7 100644
--- a/externals/CMakeLists.txt
+++ b/externals/CMakeLists.txt
@@ -199,7 +199,12 @@ endif()
 
 # httplib
 add_library(httplib INTERFACE)
-target_include_directories(httplib INTERFACE ./httplib)
+if(USE_SYSTEM_CPP_HTTPLIB)
+    find_package(CppHttp REQUIRED)
+    target_link_libraries(httplib INTERFACE cpp-httplib::cpp-httplib)
+else()
+    target_include_directories(httplib INTERFACE ./httplib)
+endif()
 target_compile_options(httplib INTERFACE -DCPPHTTPLIB_OPENSSL_SUPPORT)
 target_link_libraries(httplib INTERFACE ${OPENSSL_LIBRARIES})
 
diff --git a/externals/cmake-modules/FindCppHttp.cmake b/externals/cmake-modules/FindCppHttp.cmake
new file mode 100644
index 000000000..b91cc9f6e
--- /dev/null
+++ b/externals/cmake-modules/FindCppHttp.cmake
@@ -0,0 +1,35 @@
+if(NOT CppHttp_FOUND)
+    pkg_check_modules(HTTP_TMP cpp-httplib)
+
+    find_path(CPP-HTTP_INCLUDE_DIR NAMES httplib.h
+            PATHS
+            ${HTTP_TMP_INCLUDE_DIRS}
+            /usr/include
+            /usr/local/include
+        )
+		
+    find_library(CPP-HTTP_LIBRARIES NAMES cpp-httplib
+            PATHS
+            ${HTTP_TMP_LIBRARY_DIRS}
+            /usr/lib
+            /usr/local/lib
+        )
+		
+    if(CPP-HTTP_INCLUDE_DIR AND CPP-HTTP_LIBRARIES)
+        set(CppHttp_FOUND TRUE CACHE INTERNAL "cpp-httplib found")
+        message(STATUS "Found cpp-httplib: ${CPP-HTTP_INCLUDE_DIR}, ${CPP-HTTP_LIBRARIES}")
+    else()
+        set(CppHttp_FOUND FALSE CACHE INTERNAL "cpp-httplib found")
+        message(STATUS "Cpp-httplib not found.")
+    endif()
+	
+endif()
+
+if(CppHttp_FOUND AND NOT TARGET cpp-httplib::cpp-httplib)
+    add_library(cpp-httplib::cpp-httplib INTERFACE IMPORTED)
+    set_target_properties(cpp-httplib::cpp-httplib PROPERTIES
+        INTERFACE_INCLUDE_DIRECTORIES "${CPP-HTTP_INCLUDE_DIR}"
+        INTERFACE_LINK_LIBRARIES "${CPP-HTTP_LIBRARIES}"
+        IMPORTED_LOCATION "${CPP-HTTP_LIBRARIES}"
+    )
+endif()