astro/dist/vite-plugin-renderers/index.js

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

import { ASTRO_VITE_ENVIRONMENT_NAMES } from "../core/constants.js";
import { hasNonPrerenderedRoute } from "../core/routing/helpers.js";
export const ASTRO_RENDERERS_MODULE_ID = "virtual:astro:renderers";
const RESOLVED_ASTRO_RENDERERS_MODULE_ID = `\0${ASTRO_RENDERERS_MODULE_ID}`;
export default function vitePluginRenderers(options) {
	const renderers = options.settings.renderers;
	return {
		name: "astro:plugin-renderers",
		enforce: "pre",
		// Internal, undocumented: lets adapters (e.g. @astrojs/cloudflare) read the
		// registered renderers from the plugin chain to pre-bundle their server
		// entrypoints (see https://github.com/withastro/astro/issues/17921).
		renderers,
		resolveId: {
			filter: { id: new RegExp(`^${ASTRO_RENDERERS_MODULE_ID}$`) },
			handler() {
				return RESOLVED_ASTRO_RENDERERS_MODULE_ID;
			}
		},
		load: {
			filter: { id: new RegExp(`^${RESOLVED_ASTRO_RENDERERS_MODULE_ID}$`) },
			handler() {
				if (options.command === "build" && this.environment.name === ASTRO_VITE_ENVIRONMENT_NAMES.ssr && renderers.length > 0 && !options.serverIslandsState.hasIslands() && !hasNonPrerenderedRoute(options.routesList.routes, {
					includeEndpoints: false,
					includeExternal: true
				})) {
					return { code: `export const renderers = [];` };
				}
				if (renderers.length > 0) {
					const imports = [];
					const exports = [];
					let i = 0;
					let rendererItems = "";
					for (const renderer of renderers) {
						const variable = `_renderer${i}`;
						imports.push(`import ${variable} from ${JSON.stringify(renderer.serverEntrypoint)};`);
						rendererItems += `Object.assign(${JSON.stringify(renderer)}, { ssr: ${variable} }),`;
						i++;
					}
					exports.push(`export const renderers = [${rendererItems}];`);
					return { code: `${imports.join("\n")}\n${exports.join("\n")}` };
				}
				return { code: `export const renderers = [];` };
			}
		}
	};
}