steps

type FileWriter interface {
	WriteFile(name string, data []byte, perm fs.FileMode) error
}

type RealFileWriter struct{}

type StepCreateHMACKey struct {
	ServiceAccount string
	AccessKey      string
	SecretKey      string
	CleanupTimeout time.Duration
}

type StepCreateHMACKeyDriver interface {
	CreateHMACKey(ctx context.Context, serviceAccount, name string) (accessKey string, secretKey string, err error)
	DeleteHMACKey(ctx context.Context, serviceAccount, name string) error
}

type StepCreateVirtualMachine struct {
	Project      string
	Zone         string
	Communicator *communicator.Config
	commonconfig.VirtualMachineConfig
	*commonconfig.DiskForExportConfig

	GeneratedData *packerbuilderdata.GeneratedData
	FileWriter    FileWriter
}

type StepCreateVirtualMachineDriver interface {
	CreateDisk(context.Context, drivermws.CreateDiskParams) error
	CreateExternalAddress(context.Context, drivermws.CreateExternalAddressParams) (*ipaddress.IPAddress, error)
	CreateNetwork(context.Context, drivermws.CreateNetworkParams) error
	CreateSubnet(context.Context, drivermws.CreateSubnetParams) error
	CreateVirtualMachine(context.Context, drivermws.CreateVirtualMachineParams) (*ipaddress.IPAddress, error)
	CreateFirewallRule(context.Context, drivermws.CreateFirewallRuleParams) error

	GetImageMinDiskSize(context.Context, *computeref.ImageRef) (*bytesize.ByteSize, error)
	GetDiskBackupMinDiskSize(context.Context, *computeref.DiskBackupRef) (*bytesize.ByteSize, error)
	GetSerialPortOutput(context.Context, string, int) ([]byte, error)

	DeleteDisk(context.Context, string) error
	DeleteExternalAddress(context.Context, string) error
	DeleteNetwork(context.Context, string) error
	DeleteSubnet(context.Context, string, string) error
	DeleteVirtualMachine(context.Context, string) error
	DeleteFirewallRule(context.Context, string, string) error
}