Where do the input variables for "/defaults/main.yaml" come from?

[andsouth44]

Example:
In
~/.ansible/collections/ansible_collections/arista/avd/roles/eos_designs/defaults/main.yaml

On line 3 I see:

root_dir: '{{ inventory_dir }}'

Where does 'inventory_dir' come from?

[carlbuchmann]

@andsouth44 inventory_dir is an ansible magic variable: https://docs.ansible.com/ansible/latest/reference_appendices/special_variables.html#term-inventory_dir

[andsouth44]

Thanks!