func()

in sdk/auth/credentials/default_credentials_provider.go [52:102]

• 44 lines of code
• 8 McCabe index (conditional complexity)

func (provider *DefaultCredentialsProvider) GetCredentials() (cc *Credentials, err error) {
	if provider.lastUsedProvider != nil {
		inner, err1 := provider.lastUsedProvider.GetCredentials()
		if err1 != nil {
			err = err1
			return
		}

		providerName := inner.ProviderName
		if providerName == "" {
			providerName = provider.lastUsedProvider.GetProviderName()
		}

		cc = &Credentials{
			AccessKeyId:     inner.AccessKeyId,
			AccessKeySecret: inner.AccessKeySecret,
			SecurityToken:   inner.SecurityToken,
			ProviderName:    fmt.Sprintf("%s/%s", provider.GetProviderName(), providerName),
		}
		return
	}

	errors := []string{}
	for _, p := range provider.providerChain {
		provider.lastUsedProvider = p
		inner, errInLoop := p.GetCredentials()

		if errInLoop != nil {
			errors = append(errors, errInLoop.Error())
			// 如果有错误，进入下一个获取过程
			continue
		}

		if inner != nil {
			providerName := inner.ProviderName
			if providerName == "" {
				providerName = p.GetProviderName()
			}
			cc = &Credentials{
				AccessKeyId:     inner.AccessKeyId,
				AccessKeySecret: inner.AccessKeySecret,
				SecurityToken:   inner.SecurityToken,
				ProviderName:    fmt.Sprintf("%s/%s", provider.GetProviderName(), providerName),
			}
			return
		}
	}

	err = fmt.Errorf("unable to get credentials from any of the providers in the chain: %s", strings.Join(errors, ", "))
	return
}