type Backend interface {
// Build builds a Docker image referenced by an imageID string.//// Note: Tagging an image should not be done by a Builder, it should instead be done// by the caller.//// TODO: make this return a reference instead of string
BuildFromContext(ctx context.Context, src io.ReadCloser, remote string, buildOptions *types.ImageBuildOptions, pg backend.ProgressWriter) (string, error)
}
Backend abstracts an image builder whose only purpose is to build an image referenced by an imageID.