PWGHF: add example to modify on the fly ini in run script (#1745)

* PWGHF: add example to modify on the fly ini in run script

* Update MC/run/PWGHF/run_anchor_ini_from_cvmfs_example.sh

Co-authored-by: BiaoZhang <52267892+zhangbiao-phy@users.noreply.github.com>

* Update MC/run/PWGHF/run_anchor_ini_from_cvmfs_example.sh

Co-authored-by: BiaoZhang <52267892+zhangbiao-phy@users.noreply.github.com>

---------

Co-authored-by: BiaoZhang <52267892+zhangbiao-phy@users.noreply.github.com>

Author: fgrosa

MC/run/PWGHF/run_anchor_ini_from_cvmfs_example.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+
+export ALIEN_JDL_LPMANCHORPASSNAME="apass4"
+export ALIEN_JDL_MCANCHOR="apass4"
+export ALIEN_JDL_COLLISIONSYSTEM="pp"
+export ALIEN_JDL_LPMPASSNAME="apass4"
+export ALIEN_JDL_LPMRUNNUMBER="539071"
+export ALIEN_JDL_LPMPRODUCTIONTYPE="MC"
+export ALIEN_JDL_LPMINTERACTIONTYPE="pp"
+export ALIEN_JDL_LPMPRODUCTIONTAG="LHC24_2023zg_apass4_MC_test"
+export ALIEN_JDL_LPMANCHORRUN="539071"
+export ALIEN_JDL_LPMANCHORPRODUCTION="LHC23zg"
+export ALIEN_JDL_LPMANCHORYEAR="2023"
+
+# added export
+export NTIMEFRAMES=8
+export NSIGEVENTS=100
+export SPLITID=100
+export PRODSPLIT=153
+export CYCLE=0
+export ALIEN_PROC_ID=2963436952
+
+# disable the QC
+export DISABLE_QC=1
+
+# modify ini file, to have external generator and/or config from a specific tag different from the one used for anchoring
+ORIGINALINI=${O2DPG_ROOT}/MC/config/PWGHF/ini/GeneratorHF_D2H_bbbar_Bforced_gap5_Mode2.ini # original .ini file to be modified
+MODIFIEDINI=GeneratorHF_D2H_bbbar_Bforced_gap5_Mode2_fromCVMFS.ini # output name for the modified .ini file
+
+CFGTOREPLACE="\${O2DPG_ROOT}/MC/config/PWGHF/pythia8/generator/pythia8_beautyhadronic_with_decays_Mode2.cfg" # original config file name to be modified
+CFGFROMCVMFS="/cvmfs/alice.cern.ch/el9-x86_64/Packages/O2DPG/daily-20240912-0200-1/MC/config/PWGHF/pythia8/generator/pythia8_beautyhadronic_with_decays_Mode2.cfg" # new config file name to use
+
+GENTOREPLACE="\${O2DPG_ROOT}/MC/config/PWGHF/external/generator/generator_pythia8_gaptriggered_hf.C" # original external generator file name to be modified
+GENFROMCVMFS="/cvmfs/alice.cern.ch/el9-x86_64/Packages/O2DPG/daily-20240912-0200-1/MC/config/PWGHF/external/generator/generator_pythia8_gaptriggered_hf.C" # new external generator file name to use
+
+if [ ! -f $MODIFIEDINI ]; then
+    sed -e "s|$CFGTOREPLACE|$CFGFROMCVMFS|g" -e "s|$GENTOREPLACE|$GENFROMCVMFS|g" $ORIGINALINI > $MODIFIEDINI
+fi
+MODIFIEDINI_ABSPATH=$(readlink -f $MODIFIEDINI)
+export ALIEN_JDL_ANCHOR_SIM_OPTIONS="-gen external -ini $MODIFIEDINI_ABSPATH"
+
+${O2DPG_ROOT}/MC/run/ANCHOR/anchorMC.sh