Add dpp package (#1222)

* Add dpp package

* Update xmake.lua

* Update xmake.lua

* dpp: Fix MinGW

* Improve dpp package

* Improve dpp to minimize patch size

* Update xmake.lua

packages/d/dpp/patches/v10.0.8/static_export.patch

@@ -0,0 +1,48 @@
+diff --git a/include/dpp/export.h b/include/dpp/export.h
+index b7b35b5..838f79d 100644
+--- a/include/dpp/export.h
++++ b/include/dpp/export.h
+@@ -24,25 +24,29 @@
+ // Investigate: MSVC doesn't like this
+ //static_assert(__cplusplus >= 201703L, "D++ Requires a C++17 compatible compiler. Please ensure that you have enabled C++17 in your compiler flags.");
+ 
+-#ifdef DPP_BUILD
++#ifndef DPP_STATIC
+ 
+-	#ifdef _WIN32
+-		#include <dpp/win32_safe_warnings.h>
+-	#endif
++	#ifdef DPP_BUILD
++
++		#ifdef _WIN32
++			#include <dpp/win32_safe_warnings.h>
++		#endif
+ 
+-	#ifdef _WIN32
+-		#define DPP_EXPORT __declspec(dllexport)
++		#ifdef _WIN32
++			#define DPP_EXPORT __declspec(dllexport)
++		#else
++			#define DPP_EXPORT
++		#endif
+ 	#else
+-		#define DPP_EXPORT
++		#ifdef _WIN32
++			#define DPP_EXPORT __declspec(dllimport)
++		#else
++			#define DPP_EXPORT
++		#endif
+ 	#endif
++
+ #else
+-	#ifdef _WIN32
+-		#define DPP_EXPORT __declspec(dllimport)
+-		/* This is required otherwise fmt::format requires additional file linkage to your project */
+-		#define FMT_HEADER_ONLY
+-	#else
+-		#define DPP_EXPORT
+-	#endif
++	#define DPP_EXPORT
+ #endif
+ 
+ #ifndef _WIN32

packages/d/dpp/port/xmake.lua

@@ -0,0 +1,26 @@
+add_rules("mode.debug", "mode.release")
+
+add_requires("fmt", "nlohmann_json", "libsodium", "libopus", "openssl", "zlib")
+
+target("dpp")
+    set_kind("$(kind)")
+    set_languages("c++17")
+    add_includedirs("include")
+    add_headerfiles("include/(dpp/**.h)")
+    add_files("src/dpp/**.cpp")
+    add_packages("fmt", "nlohmann_json", "libsodium", "libopus", "openssl", "zlib")
+
+    add_defines("DPP_BUILD")
+    add_defines("HAVE_VOICE")
+
+    if is_plat("windows", "mingw") then
+        add_defines("WIN32", "_WINSOCK_DEPRECATED_NO_WARNINGS", "WIN32_LEAN_AND_MEAN")
+        add_defines("_CRT_SECURE_NO_WARNINGS", "_CRT_NONSTDC_NO_DEPRECATE")
+        add_defines("FD_SETSIZE=1024")
+        if is_plat("windows") then
+            add_cxflags("/Zc:preprocessor")
+        end
+        if is_kind("static") then
+            add_defines("DPP_STATIC", {public = true})
+        end
+    end

packages/d/dpp/xmake.lua

@@ -0,0 +1,54 @@
+package("dpp")
+    set_homepage("https://github.com/brainboxdotcc/DPP")
+    set_description("D++ Extremely Lightweight C++ Discord Library")
+    set_license("Apache-2.0")
+
+    add_urls("https://github.com/brainboxdotcc/DPP/archive/refs/tags/$(version).tar.gz",
+             "https://github.com/brainboxdotcc/DPP.git")
+
+    add_versions("v10.0.8", "7a16d31841fc67fabcafbc33abb1a6b2ac472202df7e8c48542f77e089de08e3")
+    add_patches("v10.0.8", path.join(os.scriptdir(), "patches", "v10.0.8", "static_export.patch"), "d18487580faa9af21862bcff30ddfa5d5ab5cda6aa5f779bcc1787a96ca66447")
+
+    add_deps("fmt", "nlohmann_json", "libsodium", "libopus", "openssl", "zlib")
+
+    if is_plat("linux", "macosx") then
+        add_syslinks("pthread")
+    end
+
+    on_load("windows", "mingw", function (package)
+        if not package:config("shared") then
+            package:add("defines", "DPP_STATIC")
+        end
+    end)
+
+    on_install("windows", "linux", "macosx", "mingw", function (package)
+        -- fix dpp dependencies
+        for _, file in ipairs(table.join(os.files("include/**.h"), os.files("src/**.cpp"))) do
+            io.replace(file, "#include <dpp/fmt/", "#include <fmt/", {plain = true})
+            io.replace(file, "#include <dpp/nlohmann/", "#include <nlohmann/", {plain = true})
+        end
+        io.replace("include/dpp/restrequest.h", "#include <nlohmann/json_fwd.hpp>", "#include <nlohmann/json.hpp>", {plain = true})
+        os.rmdir("include/dpp/fmt")
+        os.rmdir("include/dpp/nlohmann")
+
+        os.cp(path.join(package:scriptdir(), "port", "xmake.lua"), "xmake.lua")
+        import("package.tools.xmake").install(package)
+    end)
+
+    on_test(function (package)
+        assert(package:check_cxxsnippets({test = [[
+            void test() {
+                dpp::cluster bot(std::getenv("BOT_TOKEN"));
+            
+                bot.on_ready([&bot](auto event) {
+                    if (dpp::run_once<struct register_bot_commands>()) {
+                        bot.global_command_create(
+                            dpp::slashcommand("ping", "Ping pong!", bot.me.id)
+                        );
+                    }
+                });
+            
+                bot.start(false);
+            }
+        ]]}, {configs = {languages = "c++17"}, includes = "dpp/dpp.h"}))
+    end)