dart-lang · isoos · Sep 8, 2025 · Sep 8, 2025 · Sep 8, 2025
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -4,6 +4,7 @@ AppEngine version, listed here to ease deployment and troubleshooting.
 ## Next Release (replace with git tag when deployed)
  * Bump runtimeVersion to `2025.09.08`.
  * Upgraded stable Flutter analysis SDK to `3.35.3`.
+ * Updated SDK constraint (and language version) to `3.9`
 
 ## `20250904t074800-all`
  * Bump runtimeVersion to `2025.08.29`.

diff --git a/app/bin/tools/check_domain_access.dart b/app/bin/tools/check_domain_access.dart
@@ -43,8 +43,10 @@ Future<void> _checkHosts() async {
     for (final type in [InternetAddressType.IPv4, InternetAddressType.IPv6]) {
       final typeStr = type == InternetAddressType.IPv4 ? 'IPv4' : 'IPv6';
       try {
-        final addresses =
-            await InternetAddress.lookup(host, type: type).timeout(timeLimit);
+        final addresses = await InternetAddress.lookup(
+          host,
+          type: type,
+        ).timeout(timeLimit);
         final failed = <InternetAddress>[];
         for (final address in addresses) {
           try {
@@ -56,7 +58,8 @@ Future<void> _checkHosts() async {
         }
         final successCount = addresses.length - failed.length;
         print(
-            '- $host $typeStr resolve and connect succeeded: $successCount / ${addresses.length}');
+          '- $host $typeStr resolve and connect succeeded: $successCount / ${addresses.length}',
+        );
       } catch (e) {
         print('- $host $typeStr lookup failed: $e');
       }

diff --git a/app/bin/tools/check_drift.dart b/app/bin/tools/check_drift.dart
@@ -74,12 +74,9 @@ Future<_Sample> _sample({
 Future<_Item> _singleItem(SearchForm form) async {
   final params = form.toServiceQuery().toUriQueryParameters();
   final rs = await _client.get(
-    Uri.parse('https://search-dot-dartlang-pub.appspot.com/search').replace(
-      queryParameters: {
-        ...params,
-        'debug-drift': '1',
-      },
-    ),
+    Uri.parse(
+      'https://search-dot-dartlang-pub.appspot.com/search',
+    ).replace(queryParameters: {...params, 'debug-drift': '1'}),
   );
   if (rs.statusCode == 200) {
     final body = json.decode(rs.body) as Map<String, dynamic>;
@@ -90,8 +87,8 @@ Future<_Item> _singleItem(SearchForm form) async {
     final updatedPackages = (index['updatedPackages'] as List).cast<String>();
     final lastUpdated = DateTime.parse(index['lastUpdated'] as String);
 
-    final packagesList =
-        (body['packages'] as List).cast<Map<String, dynamic>>();
+    final packagesList = (body['packages'] as List)
+        .cast<Map<String, dynamic>>();
     final packages = <String?>[];
     final scores = <String?, double?>{};
 
@@ -119,9 +116,7 @@ class _Sample {
   final List<_Item>? items;
   _Diff? _diff;
 
-  _Sample({
-    this.items,
-  });
+  _Sample({this.items});
 
   int get length => items!.length;
   _Item get first => items!.first;
@@ -189,17 +184,18 @@ class _Diff {
       for (var j = i + 1; j < items.length; j++) {
         final item = items[i];
         final other = items[j];
-        final updatedShared = item.updatedPackages!
-            .toSet()
-            .intersection(other.updatedPackages!.toSet());
+        final updatedShared = item.updatedPackages!.toSet().intersection(
+          other.updatedPackages!.toSet(),
+        );
         final allUpdated = <String>{
           ...item.updatedPackages!,
-          ...other.updatedPackages!
+          ...other.updatedPackages!,
         };
         updatedCounts.add(allUpdated.length - updatedShared.length);
 
-        final pkgShared =
-            item.packages!.toSet().intersection(other.packages!.toSet());
+        final pkgShared = item.packages!.toSet().intersection(
+          other.packages!.toSet(),
+        );
         final allPackages = <String?>{...item.packages!, ...other.packages!};
         packagesCounts.add(allPackages.length - pkgShared.length);
 
@@ -219,20 +215,22 @@ class _Diff {
       updatedCount:
           updatedCounts.fold<int>(0, (sum, v) => sum + v) / items.length,
       updatedDuration: updatedDiffs.fold<Duration>(
-          Duration.zero, (mv, d) => mv > d ? mv : d),
+        Duration.zero,
+        (mv, d) => mv > d ? mv : d,
+      ),
     );
   }
 
   bool get hasDrift =>
       hasObservableDifference! || packagesCount! > 0.0 || scoreDiffPct! > 0.0;
 
   Map<String, dynamic> toJson() => {
-        'observable': hasObservableDifference,
-        'pkg': packagesCount,
-        'maxScore': scoreDiffPct,
-        'updated': updatedCount,
-        'maxDelta': updatedDuration,
-      };
+    'observable': hasObservableDifference,
+    'pkg': packagesCount,
+    'maxScore': scoreDiffPct,
+    'updated': updatedCount,
+    'maxDelta': updatedDuration,
+  };
 }
 
 class _FormWithSummary {

diff --git a/app/bin/tools/isolate_search_benchmark.dart b/app/bin/tools/isolate_search_benchmark.dart
@@ -24,20 +24,26 @@ final queries = [
 ];
 
 Future<void> main(List<String> args) async {
-  print('Started. Current memory: ${ProcessInfo.currentRss ~/ 1024} KiB,  '
-      'max memory: ${ProcessInfo.maxRss ~/ 1024} KiB');
+  print(
+    'Started. Current memory: ${ProcessInfo.currentRss ~/ 1024} KiB,  '
+    'max memory: ${ProcessInfo.maxRss ~/ 1024} KiB',
+  );
   final runner = await startSearchIsolate(snapshot: args.first);
-  print('Loaded. Current memory: ${ProcessInfo.currentRss ~/ 1024} KiB,  '
-      'max memory: ${ProcessInfo.maxRss ~/ 1024} KiB');
+  print(
+    'Loaded. Current memory: ${ProcessInfo.currentRss ~/ 1024} KiB,  '
+    'max memory: ${ProcessInfo.maxRss ~/ 1024} KiB',
+  );
 
   for (var i = 0; i < 5; i++) {
     await _benchmark(runner);
     print('--');
   }
 
   await runner.close();
-  print('Done. Current memory: ${ProcessInfo.currentRss ~/ 1024} KiB,  '
-      'max memory: ${ProcessInfo.maxRss ~/ 1024} KiB');
+  print(
+    'Done. Current memory: ${ProcessInfo.currentRss ~/ 1024} KiB,  '
+    'max memory: ${ProcessInfo.maxRss ~/ 1024} KiB',
+  );
 }
 
 Future<void> _benchmark(IsolateRunner primary) async {
@@ -46,25 +52,31 @@ Future<void> _benchmark(IsolateRunner primary) async {
   for (var i = 0; i < 100; i++) {
     final random = Random(i);
     final items = queries
-        .map((q) => ServiceSearchQuery.parse(
-              query: q,
-              tagsPredicate: TagsPredicate.regularSearch(),
-            ))
+        .map(
+          (q) => ServiceSearchQuery.parse(
+            query: q,
+            tagsPredicate: TagsPredicate.regularSearch(),
+          ),
+        )
         .toList();
     items.shuffle(random);
-    await Future.wait(items.map((q) async {
-      final sw = Stopwatch()..start();
-      await index.search(q);
-      final d = sw.elapsed.inMicroseconds;
-      durations.putIfAbsent('all', () => []).add(d);
-      final key = q.parsedQuery.hasFreeText ? 'primary' : 'reduced';
-      durations.putIfAbsent(key, () => []).add(d);
-    }));
+    await Future.wait(
+      items.map((q) async {
+        final sw = Stopwatch()..start();
+        await index.search(q);
+        final d = sw.elapsed.inMicroseconds;
+        durations.putIfAbsent('all', () => []).add(d);
+        final key = q.parsedQuery.hasFreeText ? 'primary' : 'reduced';
+        durations.putIfAbsent(key, () => []).add(d);
+      }),
+    );
   }
   for (final e in durations.entries) {
     e.value.sort();
-    print('${e.key.padLeft(10)}: '
-        '${e.value.average.round().toString().padLeft(10)} avg '
-        '${e.value[e.value.length * 90 ~/ 100].toString().padLeft(10)} p90');
+    print(
+      '${e.key.padLeft(10)}: '
+      '${e.value.average.round().toString().padLeft(10)} avg '
+      '${e.value[e.value.length * 90 ~/ 100].toString().padLeft(10)} p90',
+    );
   }
 }
diff --git a/app/bin/tools/public_package_page_checker.dart b/app/bin/tools/public_package_page_checker.dart
@@ -13,22 +13,28 @@ import 'package:pool/pool.dart';
 /// checks for rendering user-generated content (esp. markdown).
 Future<void> main(List<String> args) async {
   final argParser = ArgParser()
-    ..addOption('concurrency',
-        abbr: 'c', defaultsTo: '1', help: 'Number of concurrent processing.')
+    ..addOption(
+      'concurrency',
+      abbr: 'c',
+      defaultsTo: '1',
+      help: 'Number of concurrent processing.',
+    )
     ..addOption('pub-hosted-url', abbr: 'p', help: 'The PUB_HOSTED_URL to use.')
     ..addOption('limit', help: 'Stop after N successful checks.')
     ..addFlag('help', abbr: 'h', defaultsTo: false, help: 'Show help.');
 
   final argv = argParser.parse(args);
   if (argv['help'] as bool) {
     print(
-        'Usage: dart public_package_page_checker.dart --pub-hosted-url https://staging-site/ -c 8');
+      'Usage: dart public_package_page_checker.dart --pub-hosted-url https://staging-site/ -c 8',
+    );
     print('Crawls and checks public package pages on pub.dev site');
     print(argParser.usage);
     return;
   }
 
-  final pubHostedUrl = (argv['pub-hosted-url'] as String?) ??
+  final pubHostedUrl =
+      (argv['pub-hosted-url'] as String?) ??
       Platform.environment['PUB_HOSTED_URL'];
   if (pubHostedUrl == null) {
     print('Missing PUB_HOSTED_URL.');
@@ -40,48 +46,47 @@ Future<void> main(List<String> args) async {
 
   final client = httpRetryClient();
   try {
-    final nameRs =
-        await client.get(Uri.parse('$pubHostedUrl/api/package-names'));
-    final packages =
-        ((json.decode(nameRs.body) as Map)['packages'] as List).cast<String>();
+    final nameRs = await client.get(
+      Uri.parse('$pubHostedUrl/api/package-names'),
+    );
+    final packages = ((json.decode(nameRs.body) as Map)['packages'] as List)
+        .cast<String>();
     packages.shuffle();
 
     var count = 0;
     var running = true;
     final pool = Pool(concurrency);
     await Future.wait(
       packages.map(
-        (p) => pool.withResource(
-          () async {
-            if (!running) {
-              return;
-            }
+        (p) => pool.withResource(() async {
+          if (!running) {
+            return;
+          }
 
-            Future<String> checkContent(String subPath) async {
-              final uri = Uri.parse('$pubHostedUrl/packages/$p$subPath');
-              print('GET $uri');
-              final rs = await client.get(uri);
-              if (rs.statusCode != 200) {
-                print('Failed to GET: $uri');
-                throw StateError('Failed to GET "$uri".');
-              }
-              return rs.body;
+          Future<String> checkContent(String subPath) async {
+            final uri = Uri.parse('$pubHostedUrl/packages/$p$subPath');
+            print('GET $uri');
+            final rs = await client.get(uri);
+            if (rs.statusCode != 200) {
+              print('Failed to GET: $uri');
+              throw StateError('Failed to GET "$uri".');
             }
+            return rs.body;
+          }
 
-            final mainBody = await checkContent('');
-            if (mainBody.contains('$p/changelog')) {
-              await checkContent('/changelog');
-            }
-            if (mainBody.contains('$p/example')) {
-              await checkContent('/example');
-            }
-            count++;
-            if (running && limit > 0 && count >= limit) {
-              print('Limit reached, stopping...');
-              running = false;
-            }
-          },
-        ),
+          final mainBody = await checkContent('');
+          if (mainBody.contains('$p/changelog')) {
+            await checkContent('/changelog');
+          }
+          if (mainBody.contains('$p/example')) {
+            await checkContent('/example');
+          }
+          count++;
+          if (running && limit > 0 && count >= limit) {
+            print('Limit reached, stopping...');
+            running = false;
+          }
+        }),
       ),
     );
   } finally {

diff --git a/app/bin/tools/sdk_search_benchmark.dart b/app/bin/tools/sdk_search_benchmark.dart
@@ -8,20 +8,18 @@ import 'package:pub_dev/search/sdk_mem_index.dart';
 
 /// Loads a Dart SDK search snapshot and executes queries on it, benchmarking their total time to complete.
 Future<void> main() async {
-  print('Started. Current memory: ${ProcessInfo.currentRss ~/ 1024} KiB,  '
-      'max memory: ${ProcessInfo.maxRss ~/ 1024} KiB');
+  print(
+    'Started. Current memory: ${ProcessInfo.currentRss ~/ 1024} KiB,  '
+    'max memory: ${ProcessInfo.maxRss ~/ 1024} KiB',
+  );
   final index = await createSdkMemIndex();
-  print('Loaded. Current memory: ${ProcessInfo.currentRss ~/ 1024} KiB,  '
-      'max memory: ${ProcessInfo.maxRss ~/ 1024} KiB');
+  print(
+    'Loaded. Current memory: ${ProcessInfo.currentRss ~/ 1024} KiB,  '
+    'max memory: ${ProcessInfo.maxRss ~/ 1024} KiB',
+  );
 
   // NOTE: please add more queries to this list, especially if there is a performance bottleneck.
-  final queries = [
-    'chart',
-    'json',
-    'camera',
-    'android camera',
-    'sql database',
-  ];
+  final queries = ['chart', 'json', 'camera', 'android camera', 'sql database'];
 
   final sw = Stopwatch()..start();
   var count = 0;
@@ -31,6 +29,8 @@ Future<void> main() async {
   }
   sw.stop();
   print('${(sw.elapsedMilliseconds / count).toStringAsFixed(2)} ms/request');
-  print('Done. Current memory: ${ProcessInfo.currentRss ~/ 1024} KiB,  '
-      'max memory: ${ProcessInfo.maxRss ~/ 1024} KiB');
+  print(
+    'Done. Current memory: ${ProcessInfo.currentRss ~/ 1024} KiB,  '
+    'max memory: ${ProcessInfo.maxRss ~/ 1024} KiB',
+  );
 }