From 56dc1319c1dbb310d192fabaab7af20261b6373e Mon Sep 17 00:00:00 2001
From: jyelon <jyelon@gmail.com>
Date: Wed, 25 Feb 2026 17:22:26 -0500
Subject: [PATCH] Eliminate lpx-paths.hpp, which contains hardwired paths.

---
 .gitignore                                |  1 -
 Source/Integration/LockedWrapper.cpp      | 10 ++++++++--
 Source/Integration/LuprexGameModeBase.cpp |  5 +++--
 build.py                                  | 14 --------------
 4 files changed, 11 insertions(+), 19 deletions(-)

diff --git a/.gitignore b/.gitignore
index c283f688..9a607fc2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -37,7 +37,6 @@ Binaries/**
 User/**
 .vs/**
 
-Source/Integration/lpx-paths.hpp
 
 luprex/build/**
 
diff --git a/Source/Integration/LockedWrapper.cpp b/Source/Integration/LockedWrapper.cpp
index ccc90e3d..a3e73021 100644
--- a/Source/Integration/LockedWrapper.cpp
+++ b/Source/Integration/LockedWrapper.cpp
@@ -1,7 +1,7 @@
 
 #include "LockedWrapper.h"
 #include "lpx-drvutil.hpp"
-#include "lpx-paths.hpp"
+#include "Misc/Paths.h"
 
 using namespace LpxCommonTypes;
 
@@ -17,7 +17,13 @@ void FlxLockedWrapper::InitWrapper() {
 		// Already initialized.
 		return;
 	}
-	FString dll((const UTF8CHAR*)LUPREX_DLL_PATH);
+#if PLATFORM_LINUX
+	FString dll = FPaths::Combine(FPaths::ProjectDir(), TEXT("luprex/build/Linux/luprexlib.so"));
+#elif PLATFORM_WINDOWS
+	FString dll = FPaths::Combine(FPaths::ProjectDir(), TEXT("luprex/build/Windows/luprexlib.dll"));
+#else
+	#error "Unsupported platform"
+#endif
 	UE_LOG(LogLuprex, Verbose, TEXT("Luprex DLL Path: %s"), *dll);
 	void* DLL = FPlatformProcess::GetDllHandle(*dll);
 	if (DLL != nullptr) {
diff --git a/Source/Integration/LuprexGameModeBase.cpp b/Source/Integration/LuprexGameModeBase.cpp
index df5e5a4d..b36c03a3 100644
--- a/Source/Integration/LuprexGameModeBase.cpp
+++ b/Source/Integration/LuprexGameModeBase.cpp
@@ -2,7 +2,7 @@
 
 #include "LuprexGameModeBase.h"
 #include "lpx-drvutil.hpp"
-#include "lpx-paths.hpp"
+#include "Misc/Paths.h"
 #include "Tangible.h"
 #include "TangibleManager.h"
 #include "LuaCall.h"
@@ -41,7 +41,8 @@ uint32 ALuprexGameModeBase::Run() {
 	if (lockedwrap->get_rescan_lua_source(lockedwrap.Get()))
 	{
 		drvutil::ostringstream srcpak;
-		std::string srcpakerr = drvutil::package_lua_source(LUPREX_ROOT_PATH, &srcpak);
+		FString LuprexRoot = FPaths::Combine(FPaths::ProjectDir(), TEXT("luprex"));
+		std::string srcpakerr = drvutil::package_lua_source(TCHAR_TO_UTF8(*LuprexRoot), &srcpak);
 		if (!srcpakerr.empty())
 		{
 			FString FMessage((const UTF8CHAR *)(srcpakerr.c_str()));
diff --git a/build.py b/build.py
index f98b5aa9..cdab8927 100755
--- a/build.py
+++ b/build.py
@@ -247,19 +247,6 @@ def generate_buildconfiguration_xml():
     target2.write_text(template)
 
 
-def generate_lpx_paths():
-    """
-    Unreal needs to be able to find the Luprex DLL, and it also needs to find the
-    Lua source code.  For now, we just compile some hardwired paths into the
-    binary.  Someday we'll do something more sophisticated.
-    """
-    target = Path(f"{INTEGRATION}/Source/Integration/lpx-paths.hpp")
-    line1 = f'#define LUPREX_DLL_PATH "{INTEGRATION}/luprex/build/{OS}/luprexlib.{DLL}"'
-    line2 = f'#define LUPREX_ROOT_PATH "{INTEGRATION}/luprex"'
-    code = line1 + "\n" + line2 + "\n"
-    target.unlink(missing_ok=True)
-    target.write_text(code)
-
 
 def generate_integration_uproject():
     """
@@ -406,7 +393,6 @@ if MODE == "code-workspace":
 if MODE == "all":
     unzip_unreal_engine_and_apply_patch()
     generate_buildconfiguration_xml()
-    generate_lpx_paths()
     generate_integration_uproject()
     run_unrealengine_setup_bat_replacement()
     run_generateprojectfiles_in_sandbox()