Prior to Hydra 1.1, @hydra.main() and hydra.initialize() default
config path was the directory containing the Python app (calling @hydra.main() or hydra.initialize()).
This can cause unexpected behavior:
- Sibling directories are interpreted as config groups, which can lead to surprising results (See #1533).
- The subtree added automatically can have many files/directories - which will cause --help to be very slow as it's scanning for all config groups/config files (See #759).
To address these issues, Hydra 1.1 issues a warning if the config_path is not specified.
Your options are as follows:
For applications with config files, specify a directory like "conf" to use a dedicated config directory relative to the application.
For applications that do not define config files next to the Python script (typically applications using only Structured Configs), it is recommended that
None as the config_path, indicating that no directory should be added to the config search path.
This will become the default in Hydra 1.2.
Use the directory/module of the Python script.
This was the default behavior up to Hydra 1.0.
This is not recommended as it can cause the surprising behavior outlined above.