E0423: A context processor variable read without a context

A processor variable is read from the request being served, which a function knows through its ctx. Markup always has one. A function of a .vuka file, or a method in a shape's script, has one only when it takes ctx context.Context; this one doesn't. Reported by the compiler.

Wrong

func (h *Header) greeting() string {
	return "Hello, " + user.Name
}

Right

func (h *Header) greeting(ctx context.Context) string {
	return "Hello, " + user.Name
}

See context processors.