INNER CODE UNIT · Python

CfnTagLoader

awslabs/awsome-distributed-ai · .github/scripts/stage-template-publish.py:16

class CfnTagLoader(yaml.SafeLoader):
    """YAML loader that preserves structure while tolerating CloudFormation tags."""


def _construct_unknown(loader: CfnTagLoader, node: yaml.Node) -> Any:
    if isinstance(node, yaml.ScalarNode):
        return loader.construct_scalar(node)
    if isinstance(node, yaml.SequenceNode):
        return loader.construct_sequence(node)
    if isinstance(node, yaml.MappingNode):
        return loader.construct_mapping(node)
    raise TypeError(f"Unsupported YAML node: {type(node).__name__}")


CfnTagLoader.add_multi_constructor("", lambda loader, _tag, node: _construct_unknown(loader, node))


S3_KEY_RE = re.compile(r"^[A-Za-z0-9!_.*'()/.-]+$")

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