Overview

Teaching: 5 min
Exercises: 15 min

Questions

• How do I prepare a workspace and add two new modules?

Objectives

• Review concepts learned in previous lessons: git, cmake, make.

Changing the data path

Since the inputFilePath in source/util/AnalysisPayload.cxx is out of date, let’s first update that since we will need to run our analyis during the module.

The new data file is:

/work/eresseguie/bootcamp/DAOD_EXOT27.24604725._000001.pool.root.1

Preparing your repository and compiling existing code

Before making modifications, it is always good to compile the exisiting directory to make sure there are no errors.

Inside the folder you have cloned, you will need to first create two folders: one for the compiled binaries (build), one for the analysis results (run).

Let’s create our two folders:

mkdir build/
mkdir run/

You should then build and compile your code.

Solution

Here is the sequence of commands to build and compile your code.

cmake -Ssource -Bbuild
cmake --build build
source build/x86_64-centos7-gcc8-opt/setup.sh

You can also run your code now if you would like before moving to the next step.

Adding two new submodules

The MC process we are studying does not only have b-jets, it also has leptons. For leptons, we’ll only consider electrons and muons.

For the jet selection, we added the git submodule JetSelectionHelper in a previous module. We will now add two new submodules for the electron and muon selections: ElectronSelectionHelper and the MuonSelectionHelper.

We want to add both of these subomdules to the source folder.

Solution

The commands to add the submodules are the following.

git submodule add https://gitlab.cern.ch/usatlas-computing-bootcamp-2021/MuonSelectionHelper.git source/MuonSelectionHelper
git submodule add https://gitlab.cern.ch/usatlas-computing-bootcamp-2021/ElectronSelectionHelper.git source/ElectronSelectionHelper

Your source folder should look like this:

AnalysisPayload  CMakeLists.txt  ElectronSelectionHelper  JetSelectionHelper  MuonSelectionHelper

Key Points

• We can add more than one submodule