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scripts/check-links.mjs

@@ -56,7 +56,7 @@ try {
 }
 
 const files = await walk(dist);
-const htmlAndXml = files.filter((file) => /\.(html|xml)$/.test(file));
+const checkedFiles = files.filter((file) => /\.(html|xml|css|webmanifest)$/.test(file));
 
 function pagePathname(file) {
   const rel = path.relative(dist, file).replaceAll(path.sep, '/');
@@ -65,14 +65,52 @@ function pagePathname(file) {
   return `/${rel}`;
 }
 
-for (const file of htmlAndXml) {
+function collectUrlReferences(body, rel) {
+  const urls = [];
+
+  for (const match of body.matchAll(/\b(?:href|src|poster)=["']([^"']+)["']/g)) {
+    urls.push(match[1]);
+  }
+
+  for (const match of body.matchAll(/\bsrcset=["']([^"']+)["']/g)) {
+    for (const candidate of match[1].split(',')) {
+      const url = candidate.trim().split(/\s+/)[0];
+      if (url) urls.push(url);
+    }
+  }
+
+  if (rel.endsWith('.css')) {
+    for (const match of body.matchAll(/url\(\s*['"]?([^'")]+)['"]?\s*\)/g)) {
+      urls.push(match[1]);
+    }
+  }
+
+  if (rel.endsWith('.webmanifest')) {
+    try {
+      const manifest = JSON.parse(body);
+      for (const key of ['start_url', 'scope']) {
+        if (typeof manifest[key] === 'string') urls.push(manifest[key]);
+      }
+      for (const icon of manifest.icons ?? []) {
+        if (typeof icon?.src === 'string') urls.push(icon.src);
+      }
+      for (const screenshot of manifest.screenshots ?? []) {
+        if (typeof screenshot?.src === 'string') urls.push(screenshot.src);
+      }
+    } catch {
+      failures.push(`${rel}: invalid web manifest JSON`);
+    }
+  }
+
+  return urls;
+}
+
+for (const file of checkedFiles) {
   const body = await readFile(file, 'utf8');
   const rel = path.relative(dist, file);
   const baseUrl = new URL(pagePathname(file), 'https://schmelczer.dev');
-  const matches = body.matchAll(/\b(?:href|src)=["']([^"'#?]+)(?:[?#][^"']*)?["']/g);
 
-  for (const match of matches) {
-    const raw = match[1];
+  for (const raw of collectUrlReferences(body, rel)) {
     if (/^(mailto:|tel:|data:)/i.test(raw)) continue;
 
     let parsed;