Add DetectorVersionRunAction plugin and devcontainer setup

src/plugins/CMakeLists.txt

@@ -1,14 +1,37 @@
 cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
 
+# Build the plugin library
 dd4hep_add_plugin(NPDetPlugins
   SOURCES
     src/EICInteractionVertexBoost.cxx
     src/EICInteractionVertexSmear.cxx
     src/OpticalPhotonEfficiencyStackingAction.cxx
+    src/DetectorVersionRunAction.cxx
   INCLUDES $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
   USES DD4hep::DDCore DD4hep::DDG4
 )
 
+# Create components file template
+file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/libNPDetPlugins.components.in
+"v2::libNPDetPlugins.so:EICInteractionVertexBoost
+v2::libNPDetPlugins.so:EICInteractionVertexSmear
+v2::libNPDetPlugins.so:OpticalPhotonEfficiencyStackingAction
+v2::libNPDetPlugins.so:DetectorVersionRunAction")
+
+# Copy components file to lib directory
+add_custom_command(TARGET NPDetPlugins POST_BUILD
+    COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_BINARY_DIR}/lib
+    COMMAND ${CMAKE_COMMAND} -E copy
+            ${CMAKE_CURRENT_BINARY_DIR}/libNPDetPlugins.components.in
+            ${CMAKE_BINARY_DIR}/lib/libNPDetPlugins.components
+    COMMENT "Installing components file"
+)
+
+# Install the components file
+install(FILES ${CMAKE_BINARY_DIR}/lib/libNPDetPlugins.components
+        DESTINATION lib
+)
+
 install(TARGETS NPDetPlugins
   EXPORT NPDetTargets
   LIBRARY DESTINATION lib

src/plugins/include/npdet/DetectorVersionRunAction.h

@@ -0,0 +1,41 @@
+#ifndef NPDET_DETECTORVERSIONRUNACTION_H
+#define NPDET_DETECTORVERSIONRUNACTION_H
+
+#include "DDG4/Geant4Action.h"
+#include "DDG4/Geant4RunAction.h"
+#include "DD4hep/Detector.h"
+#include "DDG4/RunParameters.h"
+
+// Geant4 includes
+#include "G4Run.hh"
+
+/// Namespace for the npsim toolkit
+namespace npdet {
+
+/// DD4hep RunAction plugin for storing detector version information
+/**
+ * This class implements a Geant4 RunAction plugin that stores the detector
+ * version information from DD4hep constants into run parameters.
+ */
+class DetectorVersionRunAction : public dd4hep::sim::Geant4RunAction {
+public:
+  /// Constructor
+  /**
+   * @param context The context object for the action
+   * @param name The name of the action
+   */
+  DetectorVersionRunAction(dd4hep::sim::Geant4Context* context, const std::string& name);
+
+  /// Destructor
+  virtual ~DetectorVersionRunAction() = default;
+
+  /// Begin-of-run callback
+  virtual void begin([[maybe_unused]] const G4Run* run) override;
+
+  /// End-of-run callback
+  virtual void end([[maybe_unused]] const G4Run* run) override;
+};
+
+} // namespace npdet
+
+#endif // NPDET_DETECTORVERSIONRUNACTION_H

src/plugins/src/DetectorVersionRunAction.cxx

@@ -0,0 +1,46 @@
+#include "npdet/DetectorVersionRunAction.h"
+
+// DD4hep includes
+#include "DD4hep/Printout.h"
+#include "DDG4/Geant4RunAction.h"
+#include "DDG4/Factories.h"
+#include "DDG4/Geant4Kernel.h"
+#include "DD4hep/Detector.h"
+
+// Geant4 includes
+#include "G4Run.hh"
+
+using namespace dd4hep::sim;
+
+namespace npdet {
+
+DetectorVersionRunAction::DetectorVersionRunAction(Geant4Context* context, const std::string& name)
+    : Geant4RunAction(context, name) {
+}
+
+void DetectorVersionRunAction::begin([[maybe_unused]] const G4Run* run) {
+  // Get the DD4hep detector description
+  auto& detector = context()->kernel().detectorDescription();
+
+  try {
+    // Try to get the epic_version constant
+    double epic_version = detector.constantAsDouble("epic_version");
+
+    // Store the epic_version in the action's properties
+    this->property("epic_version").set(epic_version);
+    dd4hep::printout(dd4hep::INFO, "DetectorVersionRunAction", 
+                    "Stored epic_version = %f in action properties", epic_version);
+
+  } catch (const std::exception& e) {
+    dd4hep::printout(dd4hep::WARNING, "DetectorVersionRunAction", 
+                    "Failed to get epic_version constant: %s", e.what());
+  }
+}
+
+void DetectorVersionRunAction::end([[maybe_unused]] const G4Run* run) {
+}
+
+} // namespace npdet
+
+// Factory declaration for the RunAction
+DECLARE_GEANT4ACTION_NS(npdet, DetectorVersionRunAction)