From 3b9b8ad0584d3dda67d774cc7256084cfda13b20 Mon Sep 17 00:00:00 2001
From: Marco Giacalone <mgiacalo@gmail.com>
Date: Mon, 24 Nov 2025 20:24:35 +0100
Subject: [PATCH] Add TPC Loopers collision system confKey

---
 MC/bin/o2dpg_sim_workflow.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/MC/bin/o2dpg_sim_workflow.py b/MC/bin/o2dpg_sim_workflow.py
index 39af5c9a5..04bd1ad29 100755
--- a/MC/bin/o2dpg_sim_workflow.py
+++ b/MC/bin/o2dpg_sim_workflow.py
@@ -941,8 +941,9 @@ def getDPL_global_options(bigshm=False, ccdbbackend=True, runcommand=True):
          SGNGENtask['cmd'] += ' ; RC=$? ; [[ ${RC} == 0 || ${RC} == 124 ]]'
       continue
 
-   # GeneratorFromO2Kine parameters are needed only before the transport
-   CONFKEY = re.sub(r'GeneratorFromO2Kine.*?;', '', CONFKEY)
+   # Adding TPC loopers collision system, while removing default extkinO2 config for sgnsim
+   TPCLoopersConfig = ';GenTPCLoopers.colsys=' + COLTYPE
+   CONFKEY = constructConfigKeyArg(create_geant_config(args, args.confKey + TPCLoopersConfig))
 
    sgnmem = 6000 if COLTYPE == 'PbPb' else 4000
    SGNtask=createTask(name='sgnsim_'+str(tf), needs=signalneeds, tf=tf, cwd='tf'+str(tf), lab=["GEANT"],