Not the complete Artus repository needs to be checked out. A sparce checkout of the relevant sub-packages is sufficient. To do the checkout in the current directory, do the following steps.

wget https://raw.githubusercontent.com/KIT-CMS/Artus/master/HarryPlotter/scripts/harry_sparse_checkout.sh
bash harry_sparse_checkout.sh
rm harry_sparse_checkout.sh

In order to setup HarryPlotter, execute the following commands in every shell, where you want to use it.

source <path/to/>Artus/Configuration/scripts/ini_artus_python_standalone.sh
source <path/to/>Artus/HarryPlotter/scripts/ini_harry.sh

ROOT needs to be set up for using HarryPlotter.