rwsdk/dist/vite/injectVitePreamblePlugin.mjs

Build fast, server-driven webapps on Cloudflare with SSR, RSC, and realtime

import MagicString from "magic-string";
export const injectVitePreamble = ({ clientEntryPathnames, }) => ({
    name: "rwsdk:inject-vite-preamble",
    apply: "serve",
    transform(code, id) {
        if (this.environment.name !== "client") {
            return;
        }
        if (!clientEntryPathnames.includes(id)) {
            return;
        }
        // Only inject preamble in development mode
        if (process.env.NODE_ENV !== "development") {
            return;
        }
        const s = new MagicString(code);
        s.prepend(`import 'virtual:vite-preamble';\n`);
        return {
            code: s.toString(),
            map: s.generateMap({ hires: true }),
        };
    },
});