astro/dist/vite-plugin-adapter-config/index.js

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

import { isAstroServerEnvironment } from "../environments.js";
import { fileURLToPath } from "node:url";
import { ASTRO_VITE_ENVIRONMENT_NAMES } from "../core/constants.js";
// This is used by Cloudflare's optimizeDeps
const VIRTUAL_CLIENT_ID = "virtual:astro:adapter-config/client";
const RESOLVED_VIRTUAL_CLIENT_ID = "\0" + VIRTUAL_CLIENT_ID;
export function vitePluginAdapterConfig(settings) {
	return {
		name: "astro:adapter-config",
		config() {
			const { adapter } = settings;
			if (adapter && adapter.entrypointResolution === "auto" && adapter.serverEntrypoint) {
				return { environments: { [ASTRO_VITE_ENVIRONMENT_NAMES.ssr]: { build: { rolldownOptions: { input: { index: typeof adapter.serverEntrypoint === "string" ? adapter.serverEntrypoint : fileURLToPath(adapter.serverEntrypoint) } } } } } };
			}
		},
		resolveId: {
			filter: { id: new RegExp(`^${VIRTUAL_CLIENT_ID}$`) },
			handler() {
				return RESOLVED_VIRTUAL_CLIENT_ID;
			}
		},
		load: {
			filter: { id: new RegExp(`^${RESOLVED_VIRTUAL_CLIENT_ID}$`) },
			handler() {
				// During SSR, return empty headers to avoid any runtime issues
				if (isAstroServerEnvironment(this.environment)) {
					return { code: `export const internalFetchHeaders = {};` };
				}
				const adapter = settings.adapter;
				const clientConfig = adapter?.client || {};
				let internalFetchHeaders = {};
				if (clientConfig.internalFetchHeaders) {
					internalFetchHeaders = typeof clientConfig.internalFetchHeaders === "function" ? clientConfig.internalFetchHeaders() : clientConfig.internalFetchHeaders;
				}
				return { code: `export const internalFetchHeaders = ${JSON.stringify(internalFetchHeaders)};` };
			}
		}
	};
}