func NewSDKConfig()

in google/sdk.go [54:121]
66 lines of code
16 McCabe index (conditional complexity)

func NewSDKConfig(account string) (*SDKConfig, error) {
	configPath, err := sdkConfigPath()
	if err != nil {
		return nil, fmt.Errorf("oauth2/google: error getting SDK config path: %v", err)
	}
	credentialsPath := filepath.Join(configPath, "credentials")
	f, err := os.Open(credentialsPath)
	if err != nil {
		return nil, fmt.Errorf("oauth2/google: failed to load SDK credentials: %v", err)
	}
	defer f.Close()

	var c sdkCredentials
	if err := json.NewDecoder(f).Decode(&c); err != nil {
		return nil, fmt.Errorf("oauth2/google: failed to decode SDK credentials from %q: %v", credentialsPath, err)
	}
	if len(c.Data) == 0 {
		return nil, fmt.Errorf("oauth2/google: no credentials found in %q, run `gcloud auth login` to create one", credentialsPath)
	}
	if account == "" {
		propertiesPath := filepath.Join(configPath, "properties")
		f, err := os.Open(propertiesPath)
		if err != nil {
			return nil, fmt.Errorf("oauth2/google: failed to load SDK properties: %v", err)
		}
		defer f.Close()
		ini, err := parseINI(f)
		if err != nil {
			return nil, fmt.Errorf("oauth2/google: failed to parse SDK properties %q: %v", propertiesPath, err)
		}
		core, ok := ini["core"]
		if !ok {
			return nil, fmt.Errorf("oauth2/google: failed to find [core] section in %v", ini)
		}
		active, ok := core["account"]
		if !ok {
			return nil, fmt.Errorf("oauth2/google: failed to find %q attribute in %v", "account", core)
		}
		account = active
	}

	for _, d := range c.Data {
		if account == "" || d.Key.Account == account {
			if d.Credential.AccessToken == "" && d.Credential.RefreshToken == "" {
				return nil, fmt.Errorf("oauth2/google: no token available for account %q", account)
			}
			var expiry time.Time
			if d.Credential.TokenExpiry != nil {
				expiry = *d.Credential.TokenExpiry
			}
			return &SDKConfig{
				conf: oauth2.Config{
					ClientID:     d.Credential.ClientID,
					ClientSecret: d.Credential.ClientSecret,
					Scopes:       strings.Split(d.Key.Scope, " "),
					Endpoint:     Endpoint,
					RedirectURL:  "oob",
				},
				initialToken: &oauth2.Token{
					AccessToken:  d.Credential.AccessToken,
					RefreshToken: d.Credential.RefreshToken,
					Expiry:       expiry,
				},
			}, nil
		}
	}
	return nil, fmt.Errorf("oauth2/google: no such credentials for account %q", account)
}