ci: list every nightly report on the Pages root

bench/README.md

@@ -344,14 +344,14 @@ The shared Rust benchmark nightly invocation measures both targets in quick mode
 
 ## Nightly trends
 
-The trend site will be at <https://moq-dev.github.io/moq/bench/> once the
-maintainer enables GitHub Pages with **Source: GitHub Actions**. The Nightly
+The trend site is at <https://git.moq.dev/bench/>, linked from the
+[nightly reports](https://git.moq.dev/) root with every other report. The Nightly
 workflow keeps history on one `gh-pages` branch and deploys the generated
 `github-action-benchmark` charts explicitly. The publisher runs only on `main`,
 serializes history writes, and leaves regression alerts and comments disabled.
-Enabling Pages is a separate repository setting; merging the workflow does not
-change it. Until it is enabled, the Nightly's Benchmark site job still records
-history on `gh-pages`, then fails at deployment.
+Re-running its job in place fails, because the earlier attempt's
+`github-pages` artifact remains; delete that artifact first or wait for the
+next Nightly.
 
 The charts include these measurements:
 

sh/gh/bench-publish.sh

@@ -22,7 +22,7 @@ case ${1:-} in
         fi
         git worktree add "$2" gh-pages
         just gh benchmark-report index "$2"
-        git -C "$2" add bench/index.html .nojekyll
+        git -C "$2" add index.html bench/index.html .nojekyll
         if ! git -C "$2" diff --cached --quiet; then
             git -C "$2" -c user.name=github-actions -c user.email=github-actions@users.noreply.github.com \
                 commit -m 'Update benchmark landing page'

sh/gh/bench-report.py

@@ -169,6 +169,21 @@ def index(directory):
 <p>Each series keeps its source and payload shape. A failed suite contributes no point.
 <a href="https://github.com/moq-dev/moq/blob/main/bench/README.md">Metrics and local reproduction</a></p>
 </html>
+''')
+    # gh-pages hosts every nightly report, each in its own directory with its own writer.
+    reports = []
+    for page in sorted(directory.glob('*/index.html')):
+        title = re.search(r'<title>(.*?)</title>', page.read_text(), re.S)
+        label = title.group(1).strip() if title else page.parent.name
+        reports.append(f'<li><a href="{page.parent.name}/">{html.escape(label)}</a></li>')
+    (directory / 'index.html').write_text('''<!doctype html>
+<html lang="en"><meta charset="utf-8"><meta name="viewport" content="width=device-width">
+<title>MoQ nightly reports</title>
+<style>body{font:18px system-ui;max-width:48rem;margin:4rem auto;padding:0 1rem;line-height:1.6}a{color:#066fbb}</style>
+<h1>MoQ nightly reports</h1>
+<ul>''' + ''.join(reports) + '''</ul>
+<p><a href="https://github.com/moq-dev/moq/actions/workflows/nightly.yml">Nightly runs</a></p>
+</html>
 ''')
     (directory / '.nojekyll').touch()
 

sh/gh/bench-report.test.py

@@ -92,6 +92,13 @@ def test_landing_page_keeps_existing_charts_and_history(self):
         (chart / 'data.js').write_text('history')
         report.index(self.root)
         self.assertIn('costs/', (chart.parent / 'index.html').read_text())
+        relays = self.root / 'relays'
+        relays.mkdir()
+        (relays / 'index.html').write_text('<title>Relay smoke</title>')
+        report.index(self.root)
+        landing = (self.root / 'index.html').read_text()
+        self.assertIn('<a href="bench/">MoQ benchmarks</a>', landing)
+        self.assertIn('<a href="relays/">Relay smoke</a>', landing)
         self.assertEqual((chart / 'data.js').read_text(), 'history')
         self.assertTrue((self.root / '.nojekyll').exists())