Astro's prerender breaks import.meta.url - use process.cwd()

Built an OG endpoint that reads font files from node_modules/@fontsource/... at render time. Used import.meta.url + fileURLToPath + path.resolve to compute the absolute path relative to the source file.

The first build crashed with ENOENT trying to open /.../dist/node_modules/@fontsource/.... Turns out Astro’s prerender pipeline bundles endpoint source files into dist/.prerender/chunks/<hash>.mjs, so import.meta.url points at the bundle, not the original source. path.resolve(__dirname, '../..') goes up one level into dist/ instead of the site root.

Fix: use process.cwd() as the anchor. During astro build (and during pnpm build), process.cwd() is always the site’s package dir, because that’s where the user invoked the script. Stable, well-defined, and doesn’t depend on how the build pipeline bundles your code.

// Before (breaks in prerender):
const __dirname = path.dirname(fileURLToPath(import.meta.url));
const PKG_ROOT = path.resolve(__dirname, '../..');

// After (stable):
const PKG_ROOT = process.cwd();

If you’re building endpoints that touch the filesystem at render time, reach for process.cwd() by default.