Add RSS, sitemap, and local dotted-file drafts.

check.js

@@ -1,3 +1,4 @@
+import { execFileSync } from 'node:child_process'
 import { readdir, readFile, stat } from 'node:fs/promises'
 import { join } from 'node:path'
 
@@ -24,6 +25,7 @@ const exists = async (path) => {
 
 const errors = []
 const htmlFiles = (await walk(generatedRoot)).filter((file) => file.endsWith('.html'))
+const noindexFiles = new Set()
 const clientSource = await readFile('src/main.js', 'utf8')
 const builtInPrismLanguages = new Set([
   'markup',
@@ -48,6 +50,10 @@ for (const file of htmlFiles) {
   if (duplicateIds.length > 0) errors.push(`${file}: duplicate IDs: ${[...new Set(duplicateIds)].join(', ')}`)
   if (!html.includes('<meta name="viewport"')) errors.push(`${file}: missing viewport metadata`)
   if (html.includes('<heading')) errors.push(`${file}: contains a nonstandard <heading> element`)
+  if (html.includes('name="robots"') && html.includes('noindex')) {
+    noindexFiles.add(file)
+    errors.push(`${file}: draft page must not be in production output`)
+  }
 
   for (const [, fragment] of html.matchAll(/href="#([^"]+)"/g)) {
     if (!ids.includes(fragment)) errors.push(`${file}: missing fragment target #${fragment}`)
@@ -56,10 +62,11 @@ for (const file of htmlFiles) {
   for (const [, href] of html.matchAll(/href="(\/[^"]*)"/g)) {
     if (href === '/') continue
     const pathname = href.split(/[?#]/, 1)[0]
+    const relative = pathname.replace(/^\//, '')
     let target
     if (pathname.startsWith('/src/')) target = `.${pathname}`
     else if (pathname.startsWith('/assets/') || pathname === '/favicon.ico') target = `public${pathname}`
-    else target = pathname.endsWith('/') ? join(generatedRoot, pathname, 'index.html') : join(generatedRoot, pathname)
+    else target = pathname.endsWith('/') ? join(generatedRoot, relative, 'index.html') : join(generatedRoot, relative)
     if (!(await exists(target))) errors.push(`${file}: broken internal link ${href}`)
   }
 
@@ -71,6 +78,58 @@ for (const file of htmlFiles) {
   }
 }
 
+const siteUrl = 'https://paulw.xyz'
+const generatedFile = (pathname) => {
+  const relative = pathname.replace(/^\//, '')
+  return pathname.endsWith('/') ? join(generatedRoot, relative, 'index.html') : join(generatedRoot, relative)
+}
+
+for (const name of ['feed.xml', 'sitemap.xml']) {
+  if (!(await exists(join(generatedRoot, name)))) errors.push(`missing ${name}`)
+}
+
+if (await exists(join(generatedRoot, 'feed.xml'))) {
+  const feed = await readFile(join(generatedRoot, 'feed.xml'), 'utf8')
+  if (!feed.includes('<rss version="2.0"')) errors.push('feed.xml: missing RSS 2.0 channel')
+  if (feed.includes('noindex')) errors.push('feed.xml: unexpected noindex marker')
+  for (const [, loc] of feed.matchAll(/<guid isPermaLink="true">([^<]+)<\/guid>/g)) {
+    const { pathname } = new URL(loc)
+    if (!(await exists(generatedFile(pathname)))) errors.push(`feed.xml: missing page for ${loc}`)
+  }
+}
+
+if (await exists(join(generatedRoot, 'sitemap.xml'))) {
+  const sitemap = await readFile(join(generatedRoot, 'sitemap.xml'), 'utf8')
+  if (!sitemap.includes('http://www.sitemaps.org/schemas/sitemap/0.9'))
+    errors.push('sitemap.xml: missing urlset namespace')
+
+  const locs = [...sitemap.matchAll(/<loc>([^<]+)<\/loc>/g)].map((match) => match[1])
+  for (const loc of locs) {
+    const { origin, pathname } = new URL(loc)
+    if (origin !== siteUrl) errors.push(`sitemap.xml: unexpected origin ${loc}`)
+    if (!(await exists(generatedFile(pathname))) && pathname !== '/sitemap.xml')
+      errors.push(`sitemap.xml: missing file for ${loc}`)
+  }
+
+  const locSet = new Set(locs)
+  for (const file of htmlFiles) {
+    if (file.endsWith('404.html') || noindexFiles.has(file)) continue
+    const relative = file.slice(generatedRoot.length + 1).replaceAll('\\', '/')
+    const pathname = relative === 'index.html' ? '/' : `/${relative.replace(/\/index\.html$/, '/')}`
+    const loc = `${siteUrl}${pathname}`
+    if (!locSet.has(loc)) errors.push(`sitemap.xml: missing ${loc}`)
+  }
+}
+
+if (!(await exists('public/robots.txt'))) errors.push('missing public/robots.txt')
+
+try {
+  const tracked = execFileSync('git', ['ls-files', '-z'], { encoding: 'utf8' })
+  for (const file of tracked.split('\0').filter(Boolean)) {
+    if (/(?:^|\/)\.[^/]*\.md$/.test(file)) errors.push(`${file}: hidden markdown must not be tracked`)
+  }
+} catch {}
+
 if (errors.length > 0) {
   console.error(errors.join('\n'))
   process.exitCode = 1