I'm trying to use Ansible Galaxy collections and can't find a way how to install dependencies of roles inside a collection which I specified in a role's meta/main.yml dependencies list. As I understand a galaxy.yml of a collection can have only the other collections as dependencies, but not roles.
What is the correct way to install a role's dependencies along with the installation of a collection?
Of course, it is possible to specify all dependencies in the readme file of a collection and use them in the requirements.yml, but it is not very convenient.