func()

in options.go [79:163]
71 lines of code
9 McCabe index (conditional complexity)

func (opts *options) getFirecrackerConfig() (firecracker.Config, error) {
	// validate metadata json
	if opts.FcMetadata != "" {
		if err := json.Unmarshal([]byte(opts.FcMetadata), &opts.validMetadata); err != nil {
			return firecracker.Config{},
				errors.Wrap(err, errInvalidMetadata.Error())
		}
	}
	//setup NICs
	NICs, err := opts.getNetwork()
	if err != nil {
		return firecracker.Config{}, err
	}
	// BlockDevices
	blockDevices, err := opts.getBlockDevices()
	if err != nil {
		return firecracker.Config{}, err
	}

	// vsocks
	vsocks, err := parseVsocks(opts.FcVsockDevices)
	if err != nil {
		return firecracker.Config{}, err
	}

	//fifos
	fifo, err := opts.handleFifos()
	if err != nil {
		return firecracker.Config{}, err
	}

	var (
		socketPath string
		jail       *firecracker.JailerConfig
	)

	if opts.JailerBinary != "" {
		jail = &firecracker.JailerConfig{
			GID:            firecracker.Int(opts.Gid),
			UID:            firecracker.Int(opts.Uid),
			ID:             opts.Id,
			NumaNode:       firecracker.Int(opts.NumaNode),
			ExecFile:       opts.ExecFile,
			JailerBinary:   opts.JailerBinary,
			ChrootBaseDir:  opts.ChrootBaseDir,
			Daemonize:      opts.Daemonize,
			ChrootStrategy: firecracker.NewNaiveChrootStrategy(opts.FcKernelImage),
			Stdout:         os.Stdout,
			Stderr:         os.Stderr,
			Stdin:          os.Stdin,
		}
	} else {

		// if no jail is active, either use the path from the arguments
		if opts.FcSocketPath != "" {
			socketPath = opts.FcSocketPath
		} else {
			// or generate a default socket path
			socketPath = getSocketPath()
		}
	}

	htEnabled := !opts.FcDisableHt

	return firecracker.Config{
		SocketPath:        socketPath,
		LogFifo:           opts.FcLogFifo,
		LogLevel:          opts.FcLogLevel,
		MetricsFifo:       opts.FcMetricsFifo,
		FifoLogWriter:     fifo,
		KernelImagePath:   opts.FcKernelImage,
		KernelArgs:        opts.FcKernelCmdLine,
		Drives:            blockDevices,
		NetworkInterfaces: NICs,
		VsockDevices:      vsocks,
		MachineCfg: models.MachineConfiguration{
			VcpuCount:   firecracker.Int64(opts.FcCPUCount),
			CPUTemplate: models.CPUTemplate(opts.FcCPUTemplate),
			HtEnabled:   firecracker.Bool(htEnabled),
			MemSizeMib:  firecracker.Int64(opts.FcMemSz),
		},
		JailerCfg: jail,
		VMID:      opts.Id,
	}, nil
}