This is a probably broken version of build.py

.claude/settings.local.json

@@ -1,10 +1,16 @@
 {
   "permissions": {
-    "defaultMode": "acceptEdits",
+    "allow": [
+      "WebFetch(domain:dev.epicgames.com)",
+      "WebSearch",
+      "WebFetch(domain:github.com)",
+      "Bash(chmod:*)"
+    ],
     "deny": [
       "Bash(git commit *)",
       "Bash(git push *)",
       "Bash(rm -rf *)"
-    ]
+    ],
+    "defaultMode": "acceptEdits"
   }
 }

.gitignore

@@ -46,3 +46,4 @@ luprex/ext/eris-master/src/luac
 luprex/ext/eris-master/test/persist
 luprex/ext/eris-master/test/unpersist
 
+GPF-output/**

Docs/A Summary of our Lua Patches.md

@@ -100,8 +100,6 @@ Now, I'm seriously tempted to have lua_len just return the number of keys in the
 
 Since this feels insane, I have also provided a totally new API function: lua_nkeys. This returns the number of keys in the table, full stop. It's constant-time.
 
-This patch also includes a function lua_nthkey, to get the Nth item in the table iteration, random-access style. I am not certain that this is a good idea, and I have deliberately avoided the use of this function for now, until I am convinced that it's wise.
-
 This patch is live, and is necessary to the determinism of the system.
 
 ## The Table Flag Bits Patch

build.py

@@ -340,21 +340,38 @@ def build_intellisense_database_for_clangd():
     Path(f"{INTEGRATION}/.vscode/compile_commands.json").write_text(json.dumps(ccjson, indent=2))
 
 
+def run_generateprojectfiles_in_sandbox():
+    """
+    Unreal's GenerateProjectFiles does an absolutely terrible
+    job of generating project files for vscode.  It's so bad
+    that we've decided to just not use it at all.  But we
+    still sometimes want to look at the output, to see what
+    it would have generated.  We run GenerateProjectFiles
+    in a sandbox so it can't modify the real project.  Then,
+    we leave the output in the sandbox for inspection.  The
+    results don't affect our build system at all.
+    """
+    sandbox = Path(f"{INTEGRATION}/GPF-output")
+    if sandbox.exists():
+        shutil.rmtree(sandbox)
+    sandbox.mkdir()
+    (sandbox / "Integration.uproject").write_bytes(Path(f"{INTEGRATION}/Integration.uproject").read_bytes())
+    for name in ["Source", "Config", "Content"]:
+        (sandbox / name).symlink_to(f"../{name}")
+    shell(str(sandbox), f'{UNREALENGINE}/GenerateProjectFiles.{BAT} -projectfiles -project="{sandbox}/Integration.uproject" -game')
+    # Remove the symlinks and uproject copy, leaving only generated files
+    for name in ["Source", "Config", "Content", "Integration.uproject"]:
+        (sandbox / name).unlink()
+
+
 def generate_integration_code_workspace():
     """
     We build Integration.code-workspace from a template that we
     wrote ourselves, Integration.code-workspace.tpl.json.
-    We use UnrealBuildTool to generate Integration.code-workspace.ubt,
-    but we don't use it: we just keep it as a reference that you can
-    refer to when editing the template.
     """
     workspace = f"{INTEGRATION}/Integration.code-workspace"
-    workspace_ubt = f"{INTEGRATION}/Integration.code-workspace.ubt"
     template = f"{INTEGRATION}/Integration.code-workspace.tpl.json"
     Path(workspace).unlink(missing_ok=True)
-    Path(workspace_ubt).unlink(missing_ok=True)
-    shell(INTEGRATION, f'{UNREALENGINE}/GenerateProjectFiles.{BAT} -projectfiles -project="{INTEGRATION}/Integration.uproject" -game')
-    Path(workspace).rename(workspace_ubt)
     expand_json_file(template, workspace, CONFIG)
 
 
@@ -384,6 +401,7 @@ if MODE == "all":
     generate_lpx_paths()
     generate_integration_uproject()
     run_unrealengine_setup_bat_replacement()
+    run_generateprojectfiles_in_sandbox()
     build_unrealbuildtool()
     generate_integration_code_workspace()
 

luprex/ext/eris-master/src/lapi.c

@@ -1227,20 +1227,6 @@ LUA_API int lua_nkeys (lua_State *L, int idx) {
   return n;
 }
 
-LUA_API int lua_nthkey (lua_State *L, int idx, int n) {
-  StkId t;
-  lua_lock(L);
-  t = index2addr(L, idx);
-  api_check(L, ttistable(t), "table expected");
-  api_incr_top(L);
-  api_incr_top(L);
-  int res = luaH_nthkey(L, hvalue(t), n, L->top - 2);
-  if (res == 0)
-    L->top -= 2;
-  lua_unlock(L);
-  return res;
-}
-
 LUA_API void lua_concat (lua_State *L, int n) {
   lua_lock(L);
   api_checknelems(L, n);

luprex/ext/eris-master/src/lua.h

@@ -317,7 +317,6 @@ LUA_API lua_Alloc (lua_getallocf) (lua_State *L, void **ud);
 LUA_API void      (lua_setallocf) (lua_State *L, lua_Alloc f, void *ud);
 
 LUA_API int   (lua_nkeys) (lua_State *L, int idx);
-LUA_API int   (lua_nthkey) (lua_State *L, int idx, int n);
 
 /*
 ** ===============================================================