Config composition without using hydra

[JamesLarkinWhite]

Dear all,

is something like Config composition as is solved by Hydra using
also possible by just using Omegaconf ? I would like to avoid the additional
overhead of hydra and find this feature very usefull.

#541

Thank you in advance

[Jasha10]

Hi @JamesLarkinWhite,

Hydra is a framework that automates many steps in the config composition process. Under the hood, Hydra drives OmegaConf to load and merge configs.

You can do config composition using pure OmegaConf -- you'll have to handle the business logic of loading and merging the configs yourself. If you want to achieve something like Hydra's "defaults list": this is something you'd need to code up yourself.

[omry]

You can use OmegaConf.merge() or direct assignment yourself.
However, I do recommend that you use Hydra, or at least the Hydra Compose API instead of inventing your own system.