Page not found.

import { cp, lstat, mkdir, readFile, readdir, rm, writeFile } from 'node:fs/promises';
import { dirname, join, resolve } from 'node:path';
import { fileURLToPath } from 'node:url';

const workspace = fileURLToPath(new URL('../', import.meta.url));
const output = resolve(workspace, 'dist');
// Only replace this script's generated output, never a symlink or another folder.
if (dirname(output) !== resolve(workspace) || output !== resolve(workspace, 'dist')) throw Error('Unexpected output directory.');
const existing = await lstat(output).catch(error => { if (error.code !== 'ENOENT') throw error; });
if (existing?.isSymbolicLink()) throw Error('Refusing to replace a linked output directory.');
await rm(output, { recursive: true, force: true });
await mkdir(output, { recursive: true });
const source = resolve(workspace, 'public');
// The editorial draft desk and source/release files remain local.
for (const name of ['assets', 'brand', 'build', 'fonts', 'media', 'themes', 'docs', 'theme.css', 'landing.css', 'app.html', 'vesting.html', 'demo-video.html']) {
  await cp(join(source, name), join(output, name), { recursive: true });
}
for (const name of ['index.html', 'app.css', 'brand/veylock-mark.svg', 'brand/veylock-wordmark.svg']) {
  await cp(join(source, 'themes/digital-blue', name), join(output, name));
}
// Bake in the transformations normally applied by the local Node server.
for (const name of ['index.html', 'themes/digital-blue/index.html', 'app.html']) {
  const path = join(output, name);
  let html = await readFile(path, 'utf8');
  if (name === 'app.html') html = html.replace('href="/app.css"', 'href="/themes/digital-blue/app.css"').replaceAll('/brand/veylock-mark.svg', '/themes/digital-blue/brand/veylock-mark.svg');
  html = html.replace('</head>', '<link rel="stylesheet" href="/theme.css"></head>');
  await writeFile(path, html);
}
await writeFile(join(output, '_redirects'), '/rono / 301\n/app/ /app 301\n');
await writeFile(join(output, '_headers'), '/*\n  X-Content-Type-Options: nosniff\n  X-Frame-Options: DENY\n  Referrer-Policy: strict-origin-when-cross-origin\n');
await writeFile(join(output, '404.html'), '<!doctype html><html lang="en"><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><title>Page not found · VEYLOCK</title><link rel="stylesheet" href="/app.css"><main><h1>Page not found.</h1><p>This address does not exist.</p><a class="button blue" href="/">Return to VEYLOCK ↗</a></main></html>');
const files = await readdir(output, { recursive: true, withFileTypes: true });
for (const file of files.filter(file => file.isFile())) {
  const path = join(file.parentPath, file.name);
  if ((await lstat(path)).size > 25 * 1024 * 1024) throw Error(`Asset exceeds Cloudflare Pages' 25 MiB limit: ${path}`);
  if (/\.(html|css|js|svg)$/.test(file.name) && /(?:https?:)?\/\/[^\s"'<>]*ronolaunch\.com/i.test(await readFile(path,'utf8'))) throw Error(`External Ronolaunch dependency in production asset: ${path}`);
}
console.log(`Prepared ${files.filter(file => file.isFile()).length} production assets in dist/.`);