From f150b397e1a73b1e280575ac163591ff9fe4e65a Mon Sep 17 00:00:00 2001
From: Giulio Eulisse <10544+ktf@users.noreply.github.com>
Date: Tue, 10 Nov 2026 11:02:20 +0100
Subject: [PATCH] GPU: write settings.dump from the standalone event generator

GPUChainTracking::DumpSettings only writes the calibration objects, the
GRP settings.dump is written by GPUReconstruction::DumpSettings, so a
dataset produced with --eventGenerator could not be read back.
---
 GPU/GPUTracking/qa/genEvents.cxx | 6 +++---
 GPU/GPUTracking/qa/genEvents.h   | 4 ++--
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/GPU/GPUTracking/qa/genEvents.cxx b/GPU/GPUTracking/qa/genEvents.cxx
index 5af7698fdb4dc..b7a6e468ea8a2 100644
--- a/GPU/GPUTracking/qa/genEvents.cxx
+++ b/GPU/GPUTracking/qa/genEvents.cxx
@@ -99,7 +99,7 @@ double genEvents::GetGaus(double sigma)
   return x;
 }
 
-void genEvents::InitEventGenerator()
+void genEvents::InitEventGenerator(const std::string& dir)
 {
   for (int32_t i = 0; i < 3; i++) {
     for (int32_t j = 0; j < 2; j++) {
@@ -113,6 +113,7 @@ void genEvents::InitEventGenerator()
       mClusterError[i][j]->GetXaxis()->SetTitle("Cluster Error [cm]");
     }
   }
+  mRec->rec()->DumpSettings(dir.c_str()); // the chain's own override does not write settings.dump
 }
 
 void genEvents::FinishEventGenerator()
@@ -357,9 +358,8 @@ void genEvents::RunEventGenerator(GPUChainTracking* rec, const std::string& dir)
 {
   std::unique_ptr<genEvents> gen(new genEvents(rec));
   mkdir(dir.c_str(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
-  rec->DumpSettings(dir.c_str());
 
-  gen->InitEventGenerator();
+  gen->InitEventGenerator(dir);
 
   for (int32_t i = 0; i < (configStandalone.nEvents == -1 ? 10 : configStandalone.nEvents); i++) {
     GPUInfo("Generating event %d/%d", i, configStandalone.nEvents == -1 ? 10 : configStandalone.nEvents);
diff --git a/GPU/GPUTracking/qa/genEvents.h b/GPU/GPUTracking/qa/genEvents.h
index ee5510c729525..ea209a0a46cb8 100644
--- a/GPU/GPUTracking/qa/genEvents.h
+++ b/GPU/GPUTracking/qa/genEvents.h
@@ -28,7 +28,7 @@ class genEvents
 {
  public:
   genEvents(GPUChainTracking* rec) {}
-  void InitEventGenerator() {}
+  void InitEventGenerator(const std::string& dir) {}
   int32_t GenerateEvent(const GPUParam& sectorParam, const char* filename) { return 1; }
   void FinishEventGenerator() {}
 
@@ -41,7 +41,7 @@ class genEvents
 {
  public:
   genEvents(GPUChainTracking* rec) : mRec(rec) {}
-  void InitEventGenerator();
+  void InitEventGenerator(const std::string& dir);
   int32_t GenerateEvent(const GPUParam& sectorParam, const char* filename);
   void FinishEventGenerator();