From 452b827280f86054477953773735909963135efb Mon Sep 17 00:00:00 2001
From: Marco Giacalone <mgiacalo@gmail.com>
Date: Thu, 10 Apr 2025 15:41:40 +0200
Subject: [PATCH 1/3] Update of example including EPOS4.0.3 version

---
 MC/config/examples/epos4/epos.sh              | 38 ++++++++++++-------
 MC/config/examples/ini/GeneratorEPOS4-0-3.ini | 11 ++++++
 2 files changed, 36 insertions(+), 13 deletions(-)
 create mode 100644 MC/config/examples/ini/GeneratorEPOS4-0-3.ini

diff --git a/MC/config/examples/epos4/epos.sh b/MC/config/examples/epos4/epos.sh
index c416e03f7..076e2d9c1 100755
--- a/MC/config/examples/epos4/epos.sh
+++ b/MC/config/examples/epos4/epos.sh
@@ -6,6 +6,29 @@
 
 optns="example"
 seed=$RANDOM
+EPOS4=""
+
+if [ -z "$EPO4VSN" ]; then
+    echo "Error: EPO4VSN environment variable is not set"
+    exit 1
+fi
+
+if [ "$EPO4VSN" = "4.0.0" ]; then
+    EPOS4="$EPOS4_ROOT/epos4/scripts/epos"
+    export LIBDIR=$EPOS4_ROOT/epos4/bin
+else
+    EPOS4="$EPOS4_ROOT/epos4/bin/epos"
+    export BIN_DIR=$EPOS4_ROOT/epos4/bin
+fi
+
+# Check if the environment variable EPO4 is set (mandatory with o2dpg-sim-tests on CI machines)
+# If not, set all the EPOS4 related variables, most likely they are unset as well.
+if [ -z "${EPO4}" ]; then
+    export EPO4=$EPOS4_ROOT/epos4/
+    export OPT=./
+    export HTO=./
+    export CHK=./
+fi
 
 while test $# -gt 0 ; do
     case $1 in
@@ -26,16 +49,5 @@ if [ $seed -eq 0 ]; then
     seed=$RANDOM
 fi
 
-# Check if the environment variable EPO4 is set (mandatory with o2dpg-sim-tests on CI machines)
-# If not, set all the EPOS4 related variables, most likely they are unset as well.
-if [ -z "${EPO4}" ]; then
-    export EPO4=$EPOS4_ROOT/epos4/
-    export LIBDIR=$EPOS4_ROOT/epos4/bin
-    export EPO4VSN=4.0.0
-    export OPT=./
-    export HTO=./
-    export CHK=./
-fi
-
-# Or filters the stdout with only HepMC2 useful data
-$EPOS4_ROOT/epos4/scripts/epos -hepstd -s $seed $optns | sed -n 's/^\(HepMC::\|[EAUWVP] \)/\1/p'
+# OR filters the stdout with only HepMC useful data
+$EPOS4 -hepstd -s $seed $optns | sed -n 's/^\(HepMC::\|[EAUWVP] \)/\1/p'
\ No newline at end of file
diff --git a/MC/config/examples/ini/GeneratorEPOS4-0-3.ini b/MC/config/examples/ini/GeneratorEPOS4-0-3.ini
new file mode 100644
index 000000000..cab0749d6
--- /dev/null
+++ b/MC/config/examples/ini/GeneratorEPOS4-0-3.ini
@@ -0,0 +1,11 @@
+#---> GeneratorEPOS4
+[GeneratorExternal]
+fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/examples/epos4/generator_EPOS4.C
+funcName=generateEPOS4("${O2DPG_MC_CONFIG_ROOT}/MC/config/examples/epos4/generator/example.optns", 2147483647)
+
+[GeneratorFileOrCmd]
+cmd=${O2DPG_MC_CONFIG_ROOT}/MC/config/examples/epos4/epos.sh -i cfg
+bMaxSwitch=none
+
+[HepMC]
+version=3
\ No newline at end of file

From 0cdcff383a8ab3a5f34f4a76321aa0203a5cc575 Mon Sep 17 00:00:00 2001
From: Marco Giacalone <mgiacalo@gmail.com>
Date: Mon, 14 Apr 2025 16:56:31 +0200
Subject: [PATCH 2/3] Include example with EPOS4HQ

---
 MC/config/examples/epos4/epos.sh              | 28 ++++++++++++----
 .../examples/epos4/generator/example.optns    |  2 +-
 .../examples/epos4/generator/examplehq.optns  | 33 +++++++++++++++++++
 MC/config/examples/ini/GeneratorEPOS4.ini     |  3 +-
 ...atorEPOS4-0-3.ini => GeneratorEPOS4HQ.ini} |  2 +-
 5 files changed, 59 insertions(+), 9 deletions(-)
 create mode 100755 MC/config/examples/epos4/generator/examplehq.optns
 rename MC/config/examples/ini/{GeneratorEPOS4-0-3.ini => GeneratorEPOS4HQ.ini} (86%)

diff --git a/MC/config/examples/epos4/epos.sh b/MC/config/examples/epos4/epos.sh
index 076e2d9c1..fb1ac96b8 100755
--- a/MC/config/examples/epos4/epos.sh
+++ b/MC/config/examples/epos4/epos.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # Script based on CRMC example
 # EPOS4 option files must contain ihepmc set to 2 to print HepMC
 # data on stdout. -hepmc flag is not needed anymore, but -hepstd is fundamental
@@ -17,17 +17,20 @@ if [ "$EPO4VSN" = "4.0.0" ]; then
     EPOS4="$EPOS4_ROOT/epos4/scripts/epos"
     export LIBDIR=$EPOS4_ROOT/epos4/bin
 else
-    EPOS4="$EPOS4_ROOT/epos4/bin/epos"
-    export BIN_DIR=$EPOS4_ROOT/epos4/bin
+    EPOS4="$EPOS4_ROOT/bin/epos"
 fi
 
 # Check if the environment variable EPO4 is set (mandatory with o2dpg-sim-tests on CI machines)
 # If not, set all the EPOS4 related variables, most likely they are unset as well.
 if [ -z "${EPO4}" ]; then
-    export EPO4=$EPOS4_ROOT/epos4/
     export OPT=./
     export HTO=./
     export CHK=./
+    if [ "$EPO4VSN" = "4.0.0" ]; then
+        export EPO4=$EPOS4_ROOT/epos4/
+    else
+        export EPO4=$EPOS4_ROOT/
+    fi
 fi
 
 while test $# -gt 0 ; do
@@ -41,11 +44,24 @@ done
 
 if [ ! -f $optns.optns ]; then
     echo "Error: Options file $optns.optns not found"
-    exit 1
+    exit 2
+fi
+
+if grep -Fq "set ihq 1" $optns.optns; then
+    if [ -z "$EPO4HQVSN" ]; then
+        # Error: EPOS4HQ version not found
+        exit 3
+    else
+        # Running with EPOS4HQ
+        if [ -z "${EPO4HQ}" ]; then
+            export EPO4HQ=$EPOS4HQ_ROOT/
+        fi
+        EPOS4="$EPO4HQ/bin/eposhq"
+    fi
 fi
 
 if [ $seed -eq 0 ]; then
-    echo "Seed can't be 0, random number will be used"
+    # Seed can't be 0, random number will be used
     seed=$RANDOM
 fi
 
diff --git a/MC/config/examples/epos4/generator/example.optns b/MC/config/examples/epos4/generator/example.optns
index 553ecafa8..22620815f 100644
--- a/MC/config/examples/epos4/generator/example.optns
+++ b/MC/config/examples/epos4/generator/example.optns
@@ -11,7 +11,7 @@ set laproj 1 !projectile atomic number
 set maproj 1 !projectile mass number
 set latarg 1 !target atomic number
 set matarg 1 !target mass number
-set ecms 13000 !sqrt(s)_pp
+set ecms 13600 !sqrt(s)_pp
 set istmax 25 !max status considered for storage
 
 ftime on     !string formation time non-zero
diff --git a/MC/config/examples/epos4/generator/examplehq.optns b/MC/config/examples/epos4/generator/examplehq.optns
new file mode 100755
index 000000000..209f96a55
--- /dev/null
+++ b/MC/config/examples/epos4/generator/examplehq.optns
@@ -0,0 +1,33 @@
+!--------------------------------------------------------------------
+!           proton-proton collision no hydro no hadronic cascade
+!--------------------------------------------------------------------
+
+!---------------------------------------
+!            Define run
+!---------------------------------------
+
+application hadron !hadron-hadron, hadron-nucleus, or nucleus-nucleus
+set laproj 1 !projectile atomic number
+set maproj 1 !projectile mass number
+set latarg 1 !target atomic number
+set matarg 1 !target mass number
+set ecms 13600 !sqrt(s)_pp
+set istmax 25 !max status considered for storage
+
+ftime on     !string formation time non-zero
+!suppressed decays:
+nodecays
+ 110 20 2130 -2130 2230 -2230 1130 -1130 1330 -1330 2330 -2330 3331 -3331
+end
+
+set ninicon 1            !number of initial conditions used for hydro evolution
+core full                !core/corona activated
+hydro hlle               !hydro activated
+eos x3ff                 !eos activated (epos standard EoS)
+hacas full               !hadronic cascade activated (UrQMD)
+set nfreeze 1            !number of freeze out events per hydro event
+set modsho 1             !printout every modsho events
+set centrality 0         !0=min bias
+set ihepmc 2             !HepMC output enabled on stdout
+set nfull 10             !Total number of events to be generated
+set ihq 1                !Enable EPOS4HQ
diff --git a/MC/config/examples/ini/GeneratorEPOS4.ini b/MC/config/examples/ini/GeneratorEPOS4.ini
index 33935cbe2..fabfd6066 100644
--- a/MC/config/examples/ini/GeneratorEPOS4.ini
+++ b/MC/config/examples/ini/GeneratorEPOS4.ini
@@ -6,5 +6,6 @@ funcName=generateEPOS4("${O2DPG_MC_CONFIG_ROOT}/MC/config/examples/epos4/generat
 cmd=${O2DPG_MC_CONFIG_ROOT}/MC/config/examples/epos4/epos.sh -i cfg
 bMaxSwitch=none
 
+# Set to version 2 if EPOS4.0.0 is used
 [HepMC]
-version=2
\ No newline at end of file
+version=3
diff --git a/MC/config/examples/ini/GeneratorEPOS4-0-3.ini b/MC/config/examples/ini/GeneratorEPOS4HQ.ini
similarity index 86%
rename from MC/config/examples/ini/GeneratorEPOS4-0-3.ini
rename to MC/config/examples/ini/GeneratorEPOS4HQ.ini
index cab0749d6..de88cd801 100644
--- a/MC/config/examples/ini/GeneratorEPOS4-0-3.ini
+++ b/MC/config/examples/ini/GeneratorEPOS4HQ.ini
@@ -1,7 +1,7 @@
 #---> GeneratorEPOS4
 [GeneratorExternal]
 fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/examples/epos4/generator_EPOS4.C
-funcName=generateEPOS4("${O2DPG_MC_CONFIG_ROOT}/MC/config/examples/epos4/generator/example.optns", 2147483647)
+funcName=generateEPOS4("${O2DPG_MC_CONFIG_ROOT}/MC/config/examples/epos4/generator/examplehq.optns", 2147483647)
 
 [GeneratorFileOrCmd]
 cmd=${O2DPG_MC_CONFIG_ROOT}/MC/config/examples/epos4/epos.sh -i cfg

From 3e0b2001fc2a05c9b365a71a6529a3a5bba28cde Mon Sep 17 00:00:00 2001
From: Marco Giacalone <mgiacalo@gmail.com>
Date: Fri, 30 May 2025 14:19:40 +0200
Subject: [PATCH 3/3] Make epos.sh compatible to /bin/sh

---
 MC/config/examples/epos4/epos.sh | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/MC/config/examples/epos4/epos.sh b/MC/config/examples/epos4/epos.sh
index fb1ac96b8..13a30b0d0 100755
--- a/MC/config/examples/epos4/epos.sh
+++ b/MC/config/examples/epos4/epos.sh
@@ -1,11 +1,11 @@
-#!/bin/bash
+#!/bin/sh
 # Script based on CRMC example
 # EPOS4 option files must contain ihepmc set to 2 to print HepMC
 # data on stdout. -hepmc flag is not needed anymore, but -hepstd is fundamental
 # in order not to print useless information on stdout (a z-*optns*.mtr file will be created)
 
 optns="example"
-seed=$RANDOM
+seed=$(od -An -N2 -tu2 /dev/urandom | tr -d ' ')
 EPOS4=""
 
 if [ -z "$EPO4VSN" ]; then
@@ -62,7 +62,7 @@ fi
 
 if [ $seed -eq 0 ]; then
     # Seed can't be 0, random number will be used
-    seed=$RANDOM
+    seed=$(od -An -N2 -tu2 /dev/urandom | tr -d ' ')
 fi
 
 # OR filters the stdout with only HepMC useful data