Merge branch 'egamma_calib_nosys' into 'master'

allow disabling systematics for EgammaCalibrationAndSmearingAlg (for ATLASG-2358)

See merge request !57320

(cherry picked from commit 3ce6fa19)

5cc968e5 allow disabling systematics for EgammaCalibrationAndSmearingAlg (for ATLASG-2358)

PhysicsAnalysis/Algorithms/EgammaAnalysisAlgorithms/EgammaAnalysisAlgorithms/EgammaCalibrationAndSmearingAlg.h

@@ -10,6 +10,7 @@
 #define EGAMMA_ANALYSIS_ALGORITHMS__EGAMMA_CALIBRATION_AND_SMEARING_ALG_H
 
 #include <AnaAlgorithm/AnaAlgorithm.h>
+#include <AsgTools/PropertyWrapper.h>
 #include <EgammaAnalysisInterfaces/IEgammaCalibrationAndSmearingTool.h>
 #include <EgammaAnalysisAlgorithms/CopyHelpers.h>
 #include <SelectionHelpers/SysReadSelectionHandle.h>
@@ -42,6 +43,19 @@ namespace CP
   private:
     ToolHandle<CP::IEgammaCalibrationAndSmearingTool> m_calibrationAndSmearingTool;
 
+    /// \brief whether to ignore all tool systematics
+    ///
+    /// The tool can be configured only to run the non-systematics or
+    /// only the systematics part of the corrections.  That means this
+    /// algorithm needs to be scheduled twice, once without
+    /// systematics and once with.  Besides configuring the tools for
+    /// their respective roles the first algorithm should have this
+    /// property set to avoid reporting any systematics or trying to
+    /// request any systematics.
+  private:
+    Gaudi::Property<bool> m_noToolSystematics {
+      this, "noToolSystematics", false, "whether to ignore all tool systematics"};
+
     /// \brief the systematics list we run
   private:
     SysListHandle m_systematicsList {this};

PhysicsAnalysis/Algorithms/EgammaAnalysisAlgorithms/Root/EgammaCalibrationAndSmearingAlg.cxx

@@ -35,7 +35,8 @@ namespace CP
     ANA_CHECK (m_calibrationAndSmearingTool.retrieve());
     ANA_CHECK (m_egammaHandle.initialize (m_systematicsList));
     ANA_CHECK (m_preselection.initialize (m_systematicsList, m_egammaHandle, SG::AllowEmpty));
-    ANA_CHECK (m_systematicsList.addSystematics (*m_calibrationAndSmearingTool));
+    if (!m_noToolSystematics.value())
+      ANA_CHECK (m_systematicsList.addSystematics (*m_calibrationAndSmearingTool));
     ANA_CHECK (m_systematicsList.initialize());
     ANA_CHECK (m_outOfValidity.initialize());
     return StatusCode::SUCCESS;
@@ -48,7 +49,8 @@ namespace CP
   {
     for (const auto& sys : m_systematicsList.systematicsVector())
     {
-      ANA_CHECK (m_calibrationAndSmearingTool->applySystematicVariation (sys));
+      if (!m_noToolSystematics.value())
+        ANA_CHECK (m_calibrationAndSmearingTool->applySystematicVariation (sys));
       xAOD::EgammaContainer *egammas = nullptr;
       ANA_CHECK (m_egammaHandle.getCopy (egammas, sys));
       for (xAOD::Egamma *egamma : *egammas)