def root_directory()

in atr/tasks/checks/targz.py [0:0]

• 15 lines of code
• 8 McCabe index (conditional complexity)

def root_directory(tgz_path: str) -> str:
    """Find the root directory in a tar archive and validate that it has only one root dir."""
    root = None

    with tarfile.open(tgz_path, mode="r|gz") as tf:
        for member in tf:
            if member.name and member.name.split("/")[-1].startswith("._"):
                # Metadata convention
                continue

            parts = member.name.split("/", 1)
            if len(parts) >= 1:
                if not root:
                    root = parts[0]
                elif parts[0] != root:
                    raise ValueError(f"Multiple root directories found: {root}, {parts[0]}")

    if not root:
        raise ValueError("No root directory found in archive")

    return root