func()

in container_images/registry-image-forked/types.go [117:152]

• 25 lines of code
• 6 McCabe index (conditional complexity)

func (source Source) Mirror() (Source, bool, error) {
	if source.RegistryMirror == nil {
		return Source{}, false, nil
	}

	repo, err := name.NewRepository(source.Repository)
	if err != nil {
		return Source{}, false, fmt.Errorf("parse repository: %w", err)
	}

	if repo.Registry.String() != name.DefaultRegistry {
		// only use registry_mirror for the default registry so that a mirror can
		// be configured as a global default
		//
		// note that this matches the behavior of the `docker` CLI
		return Source{}, false, nil
	}

	// resolve implicit namespace by re-parsing .Name()
	mirror, err := name.NewRepository(repo.Name())
	if err != nil {
		return Source{}, false, fmt.Errorf("resolve implicit namespace: %w", err)
	}

	mirror.Registry, err = name.NewRegistry(source.RegistryMirror.Host)
	if err != nil {
		return Source{}, false, fmt.Errorf("parse mirror registry: %w", err)
	}

	copy := source
	copy.Repository = mirror.Name()
	copy.BasicCredentials = source.RegistryMirror.BasicCredentials
	copy.RegistryMirror = nil

	return copy, true, nil
}