hydra.job.override_dirname

Hydra 1.4 deprecates hydra.job.override_dirname in favor of the hydra_override_dirname resolver. The resolver keeps the same default behavior while making override dirname generation lazy and configurable at the use site. Users can also replace it with their own resolver or interpolation when they need fundamentally different behavior.

Hydra 1.3

hydra:
  sweep:
    subdir: ${hydra.job.override_dirname}

Hydra 1.4

hydra:
  sweep:
    subdir: ${hydra_override_dirname:}

hydra.job.config.override_dirname is still used as the default configuration for ${hydra_override_dirname:}:

hydra:
  sweep:
    subdir: ${hydra_override_dirname:}/seed=${seed}
  job:
    config:
      override_dirname:
        exclude_keys:
          - seed

You can also pass options directly:

hydra:
  sweep:
    subdir: '${hydra_override_dirname:{kv_sep: "-", item_sep: "_", exclude_keys: [seed]}}'

For more control, element_resolver can apply a custom OmegaConf resolver to each directory name element before the elements are joined. The resolver must be registered separately before Hydra starts. For example, this replaces path separators, including Windows path separators, with _:

from omegaconf import OmegaConf

OmegaConf.register_new_resolver(
    "pathsafe",
    lambda value: str(value).replace("/", "_").replace("\\", "_"),
)

hydra:
  sweep:
    subdir: '${hydra_override_dirname:{item_sep: "/", element_resolver: pathsafe}}'