Merge pull request #10754 from AnthonyLatsis/stable/20250402

[stable/20250402][clang][DependencyScanning] Add API to expose module CompilerInvocation

Author: bnbarham

clang/include/clang/Tooling/DependencyScanning/ModuleDepCollector.h

@@ -183,6 +183,11 @@ struct ModuleDeps {
   /// module. Does not include argv[0].
   const std::vector<std::string> &getBuildArguments() const;
 
+  /// Experimental: get a copy of the underlying CompilerInvocation before
+  /// calling `getBuildArguments`. This provides a short cut to inspect/modify
+  /// the compiler invocation state.
+  CowCompilerInvocation getUnderlyingCompilerInvocation() const;
+
 private:
   friend class ModuleDepCollector;
   friend class ModuleDepCollectorPP;

clang/lib/Tooling/DependencyScanning/ModuleDepCollector.cpp

@@ -46,6 +46,12 @@ const std::vector<std::string> &ModuleDeps::getBuildArguments() const {
   return std::get<std::vector<std::string>>(BuildInfo);
 }
 
+CowCompilerInvocation ModuleDeps::getUnderlyingCompilerInvocation() const {
+  assert(std::holds_alternative<CowCompilerInvocation>(BuildInfo) &&
+         "ModuleDeps doesn't hold compiler invocation");
+  return *std::get_if<CowCompilerInvocation>(&BuildInfo);
+}
+
 static void
 optimizeHeaderSearchOpts(HeaderSearchOptions &Opts, ASTReader &Reader,
                          const serialization::ModuleFile &MF,