def get_scsi_resource_disk()

in selftest/selftest.py [0:0]

• 20 lines of code
• 7 McCabe index (conditional complexity)

def get_scsi_resource_disk() -> Optional[str]:
    """Get the SCSI resource disk device."""
    paths = [
        # cloud-init udev rules
        "/dev/disk/cloud/azure_resource",
        # gen2
        "/dev/disk/by-path/acpi-VMBUS:00-vmbus-f8b3781a1e824818a1c363d806ec15bb-lun-1",
        # gen1
        "/dev/disk/by-path/acpi-VMBUS:01-vmbus-000000000001*-lun-0",
    ]

    for path in paths:
        if "*" in path:
            matched_paths = glob.glob(path)
            for matched_path in matched_paths:
                resolved_path = os.path.realpath(matched_path)
                if os.path.exists(resolved_path):
                    return resolved_path.split("/")[-1]
        else:
            if os.path.exists(path):
                resolved_path = os.path.realpath(path)
                if os.path.exists(resolved_path):
                    return resolved_path.split("/")[-1]

    logger.info("no SCSI resource disk found")
    return None