func kvPreflightVersionRequest()

in pkg/vault/kv/helpers.go [37:100]
55 lines of code
16 McCabe index (conditional complexity)

func kvPreflightVersionRequest(client *api.Client, secretPath string) (mountPath string, backendVersion int, err error) {
	// We don't want to use a wrapping call here so save any custom value and
	// restore after
	currentWrappingLookupFunc := client.CurrentWrappingLookupFunc()
	client.SetWrappingLookupFunc(nil)
	defer client.SetWrappingLookupFunc(currentWrappingLookupFunc)
	currentOutputCurlString := client.OutputCurlString()
	client.SetOutputCurlString(false)
	defer client.SetOutputCurlString(currentOutputCurlString)

	r := client.NewRequest("GET", "/v1/sys/internal/ui/mounts/"+secretPath)
	//nolint:staticcheck // TODO: refactor for use of client.Logical().ReadRaw
	resp, err := client.RawRequest(r)
	if resp != nil {
		defer resp.Body.Close()
	}
	if err != nil {
		// If we get a 404 we are using an older version of vault, default to
		// version 1
		if resp != nil && resp.StatusCode == 404 {
			return "", 1, nil
		}

		return "", 0, err
	}

	secret, err := api.ParseSecret(resp.Body)
	if err != nil {
		return "", 0, err
	}
	if secret == nil {
		return "", 0, errors.New("nil response from pre-flight request")
	}
	if mountPathRaw, ok := secret.Data["path"]; ok {
		mountPath, ok = mountPathRaw.(string)
		if !ok {
			return "", 0, errors.New("path must be a string")
		}
	}
	options := secret.Data["options"]
	if options == nil {
		return mountPath, 1, nil
	}
	optionMap, ok := options.(map[string]interface{})
	if !ok {
		return mountPath, 1, nil
	}
	versionRaw, hasVersion := optionMap["version"]
	if !hasVersion || versionRaw == nil {
		return mountPath, 1, nil
	}
	version, ok := versionRaw.(string)
	if !ok {
		return "", 0, errors.New("version must be a string")
	}
	switch version {
	case "", "1":
		return mountPath, 1, nil
	case "2":
		return mountPath, 2, nil
	}

	return mountPath, 1, nil
}