Function validate_config_paths

lightx2v/utils/utils.py:720–766

Validate checkpoint paths in config dictionary. Args: config: Configuration dictionary Raises: FileNotFoundError: If any checkpoint path in config does not exist

(config: dict)

def check_path_exists(path: str) -> None:
    """
    Check if a file path exists and raise an error if it doesn't.

    Args:
        path: The file path to check

    Raises:
        FileNotFoundError: If the path is not empty and the file does not exist
    """
    if path and not path.startswith(("http://", "https://", "data:")):
        if not os.path.exists(path):
            raise FileNotFoundError(f"File does not exist: {path}")


def validate_config_paths(config: dict) -> None:
    """
    Validate checkpoint paths in config dictionary.

    Args:
        config: Configuration dictionary

    Raises:
        FileNotFoundError: If any checkpoint path in config does not exist
    """
    # Check DiT / adapter checkpoints
    if "dit_quantized_ckpt" in config and config["dit_quantized_ckpt"] is not None:
        check_path_exists(config["dit_quantized_ckpt"])
        logger.debug(f"✓ Verified dit_quantized_ckpt: {config['dit_quantized_ckpt']}")

    if "dit_original_ckpt" in config and config["dit_original_ckpt"] is not None:
        check_path_exists(config["dit_original_ckpt"])
        logger.debug(f"✓ Verified dit_original_ckpt: {config['dit_original_ckpt']}")

    if config.get("model_cls") == "ltx2_5":
        required_components = (
            "dit_original_ckpt",
            "text_encoder_original_ckpt",
            "video_vae_original_ckpt",
            "audio_vae_original_ckpt",
        )
        optional_components = (
            "duration_head_original_ckpt",
            "upsampler_original_ckpt",
        )
        for key in required_components:
            value = config.get(key)
            if not value:
                raise ValueError(f"LTX-2.5 requires {key} in the config")
            check_path_exists(value)
            logger.debug(f"✓ Verified {key}: {value}")
        for key in optional_components: