Current state with latest updates

app/Services/Sitemaps/SitemapPublishService.php

@@ -130,6 +130,7 @@ final class SitemapPublishService
         $releaseId ??= $this->releases->generateReleaseId();
 
         $familyManifest = [];
+        $groupManifest = [];
         $documents = [
             SitemapCacheService::INDEX_DOCUMENT => $this->releases->documentRelativePath(SitemapCacheService::INDEX_DOCUMENT),
         ];
@@ -180,15 +181,43 @@ final class SitemapPublishService
             ];
         }
 
+        foreach ($this->build->enabledGroupIndexes() as $groupName => $groupFamilies) {
+            foreach ($groupFamilies as $family) {
+                if (! in_array($family, $selectedFamilies, true)) {
+                    continue 2;
+                }
+            }
+
+            $built = $this->build->buildNamed($groupName, true, false);
+
+            if ($built === null) {
+                throw new \RuntimeException('Failed to build sitemap group [' . $groupName . '].');
+            }
+
+            $this->releases->putDocument($releaseId, $groupName, (string) $built['content']);
+            $documents[$groupName] = $this->releases->documentRelativePath($groupName);
+
+            $groupManifest[$groupName] = [
+                'name' => $groupName,
+                'entry_name' => $groupName,
+                'families' => $groupFamilies,
+                'documents' => [$groupName],
+                'url_count' => (int) $built['url_count'],
+                'type' => SitemapTarget::TYPE_INDEX,
+            ];
+        }
+
         $manifest = [
             'release_id' => $releaseId,
             'status' => 'built',
             'built_at' => now()->toAtomString(),
             'published_at' => null,
             'families' => $familyManifest,
+            'groups' => $groupManifest,
             'documents' => $documents,
             'totals' => [
                 'families' => count($familyManifest),
+                'groups' => count($groupManifest),
                 'documents' => count($documents),
                 'urls' => $totalUrls,
             ],
@@ -204,4 +233,4 @@ final class SitemapPublishService
 
         return $manifest;
     }
-}
+}