[clang][clang-scan-deps] Add named modules to format 'experimental-full' (#145221)

Author: naveen-seth

clang/include/clang/Tooling/DependencyScanning/DependencyScanningTool.h

@@ -15,6 +15,7 @@
 #include "clang/Tooling/JSONCompilationDatabase.h"
 #include "llvm/ADT/DenseSet.h"
 #include "llvm/ADT/MapVector.h"
+#include "llvm/ADT/STLExtras.h"
 #include <functional>
 #include <optional>
 #include <string>
@@ -56,6 +57,9 @@ struct TranslationUnitDeps {
   /// determined that the differences are benign for this compilation.
   std::vector<ModuleID> ClangModuleDeps;
 
+  /// A list of the C++20 named modules this translation unit depends on.
+  std::vector<std::string> NamedModuleDeps;
+
   /// The sequence of commands required to build the translation unit. Commands
   /// should be executed in order.
   ///
@@ -188,13 +192,23 @@ class FullDependencyConsumer : public DependencyConsumer {
     ContextHash = std::move(Hash);
   }
 
+  void handleProvidedAndRequiredStdCXXModules(
+      std::optional<P1689ModuleInfo> Provided,
+      std::vector<P1689ModuleInfo> Requires) override {
+    ModuleName = Provided ? Provided->ModuleName : "";
+    llvm::transform(Requires, std::back_inserter(NamedModuleDeps),
+                    [](const auto &Module) { return Module.ModuleName; });
+  }
+
   TranslationUnitDeps takeTranslationUnitDeps();
   ModuleDepsGraph takeModuleGraphDeps();
 
 private:
   std::vector<std::string> Dependencies;
   std::vector<PrebuiltModuleDep> PrebuiltModuleDeps;
   llvm::MapVector<ModuleID, ModuleDeps> ClangModuleDeps;
+  std::string ModuleName;
+  std::vector<std::string> NamedModuleDeps;
   std::vector<ModuleID> DirectModuleDeps;
   std::vector<Command> Commands;
   std::string ContextHash;

clang/lib/Tooling/DependencyScanning/DependencyScanningTool.cpp

@@ -171,6 +171,8 @@ TranslationUnitDeps FullDependencyConsumer::takeTranslationUnitDeps() {
   TranslationUnitDeps TU;
 
   TU.ID.ContextHash = std::move(ContextHash);
+  TU.ID.ModuleName = std::move(ModuleName);
+  TU.NamedModuleDeps = std::move(NamedModuleDeps);
   TU.FileDeps = std::move(Dependencies);
   TU.PrebuiltModuleDeps = std::move(PrebuiltModuleDeps);
   TU.Commands = std::move(Commands);

clang/lib/Tooling/DependencyScanning/ModuleDepCollector.cpp

@@ -714,9 +714,8 @@ void ModuleDepCollectorPP::EndOfMainFile() {
 
   MDC.Consumer.handleDependencyOutputOpts(*MDC.Opts);
 
-  if (MDC.Service.getFormat() == ScanningOutputFormat::P1689)
-    MDC.Consumer.handleProvidedAndRequiredStdCXXModules(
-        MDC.ProvidedStdCXXModule, MDC.RequiredStdCXXModules);
+  MDC.Consumer.handleProvidedAndRequiredStdCXXModules(
+      MDC.ProvidedStdCXXModule, MDC.RequiredStdCXXModules);
 
   for (auto &&I : MDC.ModularDeps)
     MDC.Consumer.handleModuleDependency(*I.second);