astro/dist/core/build/plugins/plugin-noop.js

Astro is a modern site builder with web best practices, performance, and DX front-of-mind.

export const NOOP_MODULE_ID = "virtual:astro:noop";
const RESOLVED_NOOP_MODULE_ID = "\0" + NOOP_MODULE_ID;
// An empty module that does nothing. This can be used as a placeholder
// when you just need a module to be in the graph.
// We use this for the client build when there are no client modules,
// because the publicDir copying happens in the client build.
export function pluginNoop() {
	return {
		name: "plugin-noop",
		resolveId: {
			filter: { id: new RegExp(`^${NOOP_MODULE_ID}$`) },
			handler() {
				return RESOLVED_NOOP_MODULE_ID;
			}
		},
		load: {
			filter: { id: new RegExp(`^${RESOLVED_NOOP_MODULE_ID}$`) },
			handler() {
				return "export const noop = {};";
			}
		},
		generateBundle(_options, bundle) {
			// Delete this bundle so that its not written out to disk.
			for (const [name, chunk] of Object.entries(bundle)) {
				if (chunk.type === "asset") continue;
				if (chunk.facadeModuleId === RESOLVED_NOOP_MODULE_ID) {
					delete bundle[name];
				}
			}
		}
	};
}