CTAO Science Portal: static Astro site with git-based CMS (Sveltia + Gitea)

Portal code only; editorial content lives in the ctao/content repo on the
demo machine's Gitea and is overlaid at build time (see README.md and
deploy/README.md). Live demo: https://astro.isl-dev.grid.cyfronet.pl

src/pages/sitemap.xml.js

@@ -0,0 +1,40 @@
+// Sitemap — hand-rolled static endpoint (no @astrojs/sitemap dependency; our URL
+// set is fully known at build time). /admin is intentionally excluded.
+import { getCollection } from 'astro:content';
+import { PAGE_FIRST, PAGE_REST } from '../lib/news.js';
+
+// Chunk sizes are imported from lib/news.js — the same values the
+// /news/[...page] route slices with, so the page count here cannot drift.
+const newsPageCount = (n) => (n <= PAGE_FIRST ? 1 : 1 + Math.ceil((n - PAGE_FIRST) / PAGE_REST));
+
+export async function GET(context) {
+  const site = context.site; // always set in astro.config.mjs
+  const news = (await getCollection('news', ({ data }) => !data.draft))
+    .sort((a, b) => b.data.date.valueOf() - a.data.date.valueOf());
+  const pages = await getCollection('pages');
+
+  // Static pages come from the actual route files, so a new src/pages/*.astro
+  // can never be forgotten here. 404 is excluded; /admin (subdirectory) is
+  // intentionally unlisted. Go-live note: /login and /dashboard are mock
+  // pages — filter them out before robots.txt stops disallowing everything.
+  const staticPages = Object.keys(import.meta.glob('./*.astro'))
+    .map((p) => p.slice(1, -'.astro'.length))
+    .filter((p) => p !== '/404')
+    .map((p) => (p === '/index' ? '/' : p))
+    .sort();
+  const urls = [
+    ...staticPages, '/news',
+    ...Array.from({ length: newsPageCount(news.length) - 1 }, (_, i) => `/news/${i + 2}`),
+    ...pages.map((p) => `/pages/${p.id}`),
+  ].map((path) => `  <url><loc>${new URL(path, site).href}</loc></url>`);
+  const articles = news.map(
+    (p) => `  <url><loc>${new URL(`/news/${p.id}`, site).href}</loc><lastmod>${p.data.date.toISOString().slice(0, 10)}</lastmod></url>`,
+  );
+
+  const xml = `<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+${[...urls, ...articles].join('\n')}
+</urlset>
+`;
+  return new Response(xml, { headers: { 'Content-Type': 'application/xml; charset=utf-8' } });
+}