Throw error when it can't find a proper template engine

[fserb]

No description provided.

[oscarotero]

Not sure about this workaround. Not all pages need a template engine.
Maybe it's better a simple if here

lume/site.js

Line 514 in d58edc7

const engine = this.#getEngine(layout);

[fserb]

Not sure if that's what you meant? I understand the first #getEngine doesn't need to exist, but I'm guessing once the person passed a layout, it needs to be on a template engine, right?

If that's not the case, then I think the right thing would probably be to check if the file exists at all.

[oscarotero]

It's ok that the first #getEngine returns undefined, and that's why there's a else if in line 535:

lume/site.js

Lines 529 to 537 in 058aa32

	const engine = this.#getEngine(page.src.ext, pageData.templateEngine);
	if (Array.isArray(engine)) {
	for (const eng of engine) {
	content = await eng.render(content, pageData, path);
	}
	} else if (engine) {
	content = await engine.render(content, pageData, path);
	}

With this change, instead returning undefined, it throws and exception.

Edit: I just realized that you change it and now it's correct. Merging. Thanks!