Autogen: Add cmQtAutoGenGlobalInitializer class

This moves the global ``AUTOMOC/UIC/RCC`` targets initializer
generation code into a separate new ``cmQtAutoGenGlobalInitializer`` class.

Source/CMakeLists.txt

@@ -320,6 +320,8 @@ set(SRCS
   cmQtAutoGen.h
   cmQtAutoGenerator.cxx
   cmQtAutoGenerator.h
+  cmQtAutoGenGlobalInitializer.cxx
+  cmQtAutoGenGlobalInitializer.h
   cmQtAutoGenInitializer.cxx
   cmQtAutoGenInitializer.h
   cmQtAutoGeneratorMocUic.cxx

Source/cmGlobalGenerator.cxx

@@ -34,8 +34,6 @@
 #include "cmMakefile.h"
 #include "cmOutputConverter.h"
 #include "cmPolicies.h"
-#include "cmQtAutoGen.h"
-#include "cmQtAutoGenInitializer.h"
 #include "cmSourceFile.h"
 #include "cmState.h"
 #include "cmStateDirectory.h"
@@ -46,6 +44,7 @@
 
 #if defined(CMAKE_BUILD_WITH_CMAKE)
 #  include "cmCryptoHash.h"
+#  include "cmQtAutoGenGlobalInitializer.h"
 #  include "cm_jsoncpp_value.h"
 #  include "cm_jsoncpp_writer.h"
 #endif
@@ -1469,64 +1468,11 @@ bool cmGlobalGenerator::ComputeTargetDepends()
 bool cmGlobalGenerator::QtAutoGen()
 {
 #ifdef CMAKE_BUILD_WITH_CMAKE
-  std::vector<std::unique_ptr<cmQtAutoGenInitializer>> autogenInits;
-
-  for (cmLocalGenerator* localGen : this->LocalGenerators) {
-    const std::vector<cmGeneratorTarget*>& targets =
-      localGen->GetGeneratorTargets();
-    // Find targets that require AUTOGEN processing
-    for (cmGeneratorTarget* target : targets) {
-      if (target->GetType() == cmStateEnums::GLOBAL_TARGET) {
-        continue;
-      }
-      if (target->GetType() != cmStateEnums::EXECUTABLE &&
-          target->GetType() != cmStateEnums::STATIC_LIBRARY &&
-          target->GetType() != cmStateEnums::SHARED_LIBRARY &&
-          target->GetType() != cmStateEnums::MODULE_LIBRARY &&
-          target->GetType() != cmStateEnums::OBJECT_LIBRARY) {
-        continue;
-      }
-      if (target->IsImported()) {
-        continue;
-      }
-
-      const bool mocEnabled = target->GetPropertyAsBool("AUTOMOC");
-      const bool uicEnabled = target->GetPropertyAsBool("AUTOUIC");
-      const bool rccEnabled = target->GetPropertyAsBool("AUTORCC");
-      if (!mocEnabled && !uicEnabled && !rccEnabled) {
-        continue;
-      }
-
-      auto qtVersion = cmQtAutoGenInitializer::GetQtVersion(target);
-      // don't do anything if there is no Qt4 or Qt5Core (which contains moc)
-      if (qtVersion.Major != 4 && qtVersion.Major != 5) {
-        continue;
-      }
-
-      autogenInits.emplace_back(cm::make_unique<cmQtAutoGenInitializer>(
-        target, mocEnabled, uicEnabled, rccEnabled, qtVersion));
-    }
-  }
-
-  if (!autogenInits.empty()) {
-    // Initialize custom targets
-    for (auto& autoGen : autogenInits) {
-      if (!autoGen->InitCustomTargets()) {
-        return false;
-      }
-    }
-
-    // Setup custom targets
-    for (auto& autoGen : autogenInits) {
-      if (!autoGen->SetupCustomTargets()) {
-        return false;
-      }
-      autoGen.reset(nullptr);
-    }
-  }
-#endif
-
+  cmQtAutoGenGlobalInitializer initializer(this->LocalGenerators);
+  return initializer.generate();
+#else
   return true;
+#endif
 }
 
 cmLinkLineComputer* cmGlobalGenerator::CreateLinkLineComputer(

Source/cmQtAutoGenGlobalInitializer.cxx

@@ -0,0 +1,76 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#include "cmQtAutoGenGlobalInitializer.h"
+#include "cmAlgorithms.h"
+#include "cmGeneratorTarget.h"
+#include "cmLocalGenerator.h"
+#include "cmQtAutoGenInitializer.h"
+
+cmQtAutoGenGlobalInitializer::cmQtAutoGenGlobalInitializer(
+  std::vector<cmLocalGenerator*> const& localGenerators)
+{
+  for (cmLocalGenerator* localGen : localGenerators) {
+    // Find targets that require AUTOMOC/UIC/RCC processing
+    for (cmGeneratorTarget* target : localGen->GetGeneratorTargets()) {
+      // Process only certain target types
+      switch (target->GetType()) {
+        case cmStateEnums::EXECUTABLE:
+        case cmStateEnums::STATIC_LIBRARY:
+        case cmStateEnums::SHARED_LIBRARY:
+        case cmStateEnums::MODULE_LIBRARY:
+        case cmStateEnums::OBJECT_LIBRARY:
+          // Process target
+          break;
+        default:
+          // Don't process target
+          continue;
+      }
+      if (target->IsImported()) {
+        // Don't process target
+        continue;
+      }
+
+      bool const moc = target->GetPropertyAsBool("AUTOMOC");
+      bool const uic = target->GetPropertyAsBool("AUTOUIC");
+      bool const rcc = target->GetPropertyAsBool("AUTORCC");
+      if (moc || uic || rcc) {
+        // We support Qt4 and Qt5
+        auto qtVersion = cmQtAutoGenInitializer::GetQtVersion(target);
+        if ((qtVersion.Major == 4) || (qtVersion.Major == 5)) {
+          // Create autogen target initializer
+          Initializers_.emplace_back(cm::make_unique<cmQtAutoGenInitializer>(
+            target, moc, uic, rcc, qtVersion));
+        }
+      }
+    }
+  }
+}
+
+cmQtAutoGenGlobalInitializer::~cmQtAutoGenGlobalInitializer()
+{
+}
+
+bool cmQtAutoGenGlobalInitializer::generate()
+{
+  return (InitializeCustomTargets() && SetupCustomTargets());
+}
+
+bool cmQtAutoGenGlobalInitializer::InitializeCustomTargets()
+{
+  for (auto& autoGen : Initializers_) {
+    if (!autoGen->InitCustomTargets()) {
+      return false;
+    }
+  }
+  return true;
+}
+
+bool cmQtAutoGenGlobalInitializer::SetupCustomTargets()
+{
+  for (auto& autoGen : Initializers_) {
+    if (!autoGen->SetupCustomTargets()) {
+      return false;
+    }
+  }
+  return true;
+}

Source/cmQtAutoGenGlobalInitializer.h

@@ -0,0 +1,32 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#ifndef cmQtAutoGenGlobalInitializer_h
+#define cmQtAutoGenGlobalInitializer_h
+
+#include "cmConfigure.h" // IWYU pragma: keep
+
+#include <memory>
+#include <vector>
+
+class cmLocalGenerator;
+class cmQtAutoGenInitializer;
+
+/// @brief Initializes the QtAutoGen generators
+class cmQtAutoGenGlobalInitializer
+{
+public:
+  cmQtAutoGenGlobalInitializer(
+    std::vector<cmLocalGenerator*> const& localGenerators);
+  ~cmQtAutoGenGlobalInitializer();
+
+  bool generate();
+
+private:
+  bool InitializeCustomTargets();
+  bool SetupCustomTargets();
+
+private:
+  std::vector<std::unique_ptr<cmQtAutoGenInitializer>> Initializers_;
+};
+
+#endif