Function UserFromImage

devcontainer/devcontainer.go:483–493

UserFromImage inspects the remote reference and returns the user that will be used to run the container.

(ref name.Reference)

// UserFromImage inspects the remote reference and returns the user
// that will be used to run the container.
func UserFromImage(ref name.Reference) (string, error) {
	image, err := remote.Image(ref, remote.WithAuthFromKeychain(creds.GetKeychain()))
	if err != nil {
		return "", fmt.Errorf("fetch image %s: %w", ref.Name(), err)
	}
	config, err := image.ConfigFile()
	if err != nil {
		return "", fmt.Errorf("fetch config %s: %w", ref.Name(), err)
	}
	return config.Config.User, nil
}