From 30c5fa6808b9a71a47d9e89ad090a824d8ea48c3 Mon Sep 17 00:00:00 2001
From: yum <yum.food.vr@gmail.com>
Date: Tue, 28 Oct 2025 19:47:02 -0700
Subject: accelerate abseil build

---
 CMakeLists.txt | 19 ++++++++++++++++++-
 README.md      |  1 -
 build.ps1      |  3 ---
 main.cc        | 20 +++++++++++++-------
 4 files changed, 31 insertions(+), 12 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3a2db3b..5bee59b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -16,7 +16,24 @@ FetchContent_Declare(
     abseil
     URL https://github.com/abseil/abseil-cpp/archive/refs/tags/20240116.1.zip
 )
-FetchContent_MakeAvailable(abseil)
+
+# Only populate abseil if it hasn't been built yet
+FetchContent_GetProperties(abseil)
+if(NOT abseil_POPULATED)
+    # Check if the built libraries already exist
+    set(ABSEIL_STATUS_LIB "${CMAKE_BINARY_DIR}/_deps/abseil-build/absl/status/absl_status.lib")
+    set(ABSEIL_STATUSOR_LIB "${CMAKE_BINARY_DIR}/_deps/abseil-build/absl/status/absl_statusor.lib")
+
+    if(NOT EXISTS "${ABSEIL_STATUS_LIB}" OR NOT EXISTS "${ABSEIL_STATUSOR_LIB}")
+        message(STATUS "Abseil libraries not found, building abseil...")
+        FetchContent_MakeAvailable(abseil)
+    else()
+        message(STATUS "Abseil libraries found, skipping rebuild")
+        # Manually populate the source directory without building
+        FetchContent_Populate(abseil)
+        add_subdirectory(${abseil_SOURCE_DIR} ${abseil_BINARY_DIR} EXCLUDE_FROM_ALL)
+    endif()
+endif()
 
 add_executable(modular_slang main.cc)
 set_target_properties(modular_slang PROPERTIES
diff --git a/README.md b/README.md
index 465a53d..a2e67c5 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,6 @@ cd build
 powershell.exe cmake.exe ..
 powershell.exe cmake.exe --build . -j 32 --config Release
 # the previous command will take a long fucking time
-# switch back to top level of repo
 cd ../..
 # do this in wsl2 or powershell. Showing wsl2/bash syntax.
 powershell.exe ./build.ps1 && ./dist/modular_slang.exe ./demo.slang
diff --git a/build.ps1 b/build.ps1
index c56ae24..00c6a8b 100644
--- a/build.ps1
+++ b/build.ps1
@@ -1,6 +1,3 @@
-if (Test-Path -Path ./build) {
-  rm -Recurse ./build
-}
 mkdir ./build
 
 cmake -S . -B build -G "Visual Studio 17 2022" -A x64
diff --git a/main.cc b/main.cc
index f6c7a3b..de429a9 100644
--- a/main.cc
+++ b/main.cc
@@ -491,7 +491,12 @@ absl::StatusOr<ComPtr<IModule>> loadSlangModule(ISession* session, const std::st
   return module;
 }
 
-absl::StatusOr<std::vector<FunctionInfo>> collectEntryPoints(
+struct EntryPointsResult {
+  std::vector<FunctionInfo> functions;
+  std::unordered_set<std::string> publicFunctions;
+};
+
+absl::StatusOr<EntryPointsResult> collectEntryPoints(
     IModule* module,
     const std::string& moduleName,
     const fs::path& sourcePath) {
@@ -521,7 +526,7 @@ absl::StatusOr<std::vector<FunctionInfo>> collectEntryPoints(
     return absl::NotFoundError(msg.str());
   }
 
-  return functions;
+  return EntryPointsResult{functions, publicFunctions};
 }
 
 absl::StatusOr<ComPtr<ICompileRequest>> createCompileRequest(
@@ -625,6 +630,7 @@ std::string removeNvapiInclude(std::string hlslSource) {
   return hlslSource;
 }
 
+
 std::string applyIncludeGuard(const std::string& hlslSource, const IncludeGuardInfo& includeGuard) {
   if (!includeGuard.present) {
     return hlslSource;
@@ -702,15 +708,15 @@ absl::Status run(int argc, char** argv) {
   }
   ComPtr<IModule> libraryModule = std::move(libraryModuleOr).value();
 
-  absl::StatusOr<std::vector<FunctionInfo>> functionsOr =
+  absl::StatusOr<EntryPointsResult> entryPointsOr =
       collectEntryPoints(libraryModule.get(), request.moduleName, request.modulePath);
-  if (!functionsOr.ok()) {
-    return functionsOr.status();
+  if (!entryPointsOr.ok()) {
+    return entryPointsOr.status();
   }
-  std::vector<FunctionInfo> functions = std::move(functionsOr).value();
+  EntryPointsResult entryPoints = std::move(entryPointsOr).value();
 
   absl::StatusOr<ComPtr<ICompileRequest>> compileRequestOr =
-      createCompileRequest(session.get(), request, targetDesc, functions);
+      createCompileRequest(session.get(), request, targetDesc, entryPoints.functions);
   if (!compileRequestOr.ok()) {
     return compileRequestOr.status();
   }
-- 
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