Switch flutter_tools to run frontend server from AOT snapshot (#135255)

Co-authored-by: Christopher Fujino <fujino@google.com>

packages/flutter_tools/lib/src/artifacts.dart

@@ -190,7 +190,7 @@ String? _artifactToFileName(Artifact artifact, Platform hostPlatform, [ BuildMod
     case Artifact.wasmOptBinary:
       return 'wasm-opt$exe';
     case Artifact.frontendServerSnapshotForEngineDartSdk:
-      return 'frontend_server.dart.snapshot';
+      return 'frontend_server_aot.dart.snapshot';
     case Artifact.linuxDesktopPath:
       return '';
     case Artifact.linuxHeaders:

packages/flutter_tools/lib/src/build_system/targets/common.dart

@@ -132,6 +132,7 @@ class KernelSnapshot extends Target {
     Source.pattern('{FLUTTER_ROOT}/packages/flutter_tools/lib/src/build_system/targets/common.dart'),
     Source.artifact(Artifact.platformKernelDill),
     Source.artifact(Artifact.engineDartBinary),
+    Source.artifact(Artifact.engineDartAotRuntime),
     Source.artifact(Artifact.frontendServerSnapshotForEngineDartSdk),
   ];
 

packages/flutter_tools/lib/src/compile.dart

@@ -244,20 +244,10 @@ class KernelCompiler {
     String? nativeAssets,
   }) async {
     final TargetPlatform? platform = targetModel == TargetModel.dartdevc ? TargetPlatform.web_javascript : null;
-    final String frontendServer = (frontendServerStarterPath == null || frontendServerStarterPath.isEmpty)
-        ? _artifacts.getArtifactPath(
-            Artifact.frontendServerSnapshotForEngineDartSdk,
-            platform: platform,
-          )
-        : frontendServerStarterPath;
     // This is a URI, not a file path, so the forward slash is correct even on Windows.
     if (!sdkRoot.endsWith('/')) {
       sdkRoot = '$sdkRoot/';
     }
-    final String engineDartPath = _artifacts.getArtifactPath(Artifact.engineDartBinary, platform: platform);
-    if (!_processManager.canRun(engineDartPath)) {
-      throwToolExit('Unable to find Dart binary at $engineDartPath');
-    }
     String? mainUri;
     final File mainFile = _fileSystem.file(mainPath);
     final Uri mainFileUri = mainFile.uri;
@@ -282,10 +272,33 @@ class KernelCompiler {
         toMultiRootPath(dartPluginRegistrantFileUri, _fileSystemScheme, _fileSystemRoots, _fileSystem.path.separator == r'\');
     }
 
-    final List<String> command = <String>[
-      engineDartPath,
-      '--disable-dart-dev',
-      frontendServer,
+    final List<String> commandToStartFrontendServer;
+    if (frontendServerStarterPath != null && frontendServerStarterPath.isNotEmpty) {
+      final String engineDartPath = _artifacts.getArtifactPath(Artifact.engineDartBinary, platform: platform);
+      if (!_processManager.canRun(engineDartPath)) {
+        throwToolExit('Unable to find Dart binary at $engineDartPath');
+      }
+      commandToStartFrontendServer = <String>[
+        engineDartPath,
+        '--disable-dart-dev',
+        frontendServerStarterPath,
+      ];
+    } else {
+      final String engineDartAotRuntimePath = _artifacts.getArtifactPath(Artifact.engineDartAotRuntime, platform: platform);
+      if (!_processManager.canRun(engineDartAotRuntimePath)) {
+        throwToolExit('Unable to find dartaotruntime binary at $engineDartAotRuntimePath');
+      }
+      commandToStartFrontendServer = <String>[
+        engineDartAotRuntimePath,
+        '--disable-dart-dev',
+        _artifacts.getArtifactPath(
+          Artifact.frontendServerSnapshotForEngineDartSdk,
+          platform: platform,
+        ),
+      ];
+    }
+
+    final List<String> command = commandToStartFrontendServer + <String>[
       '--sdk-root',
       sdkRoot,
       '--target=$targetModel',
@@ -777,16 +790,25 @@ class DefaultResidentCompiler implements ResidentCompiler {
     String? nativeAssetsUri,
   }) async {
     final TargetPlatform? platform = (targetModel == TargetModel.dartdevc) ? TargetPlatform.web_javascript : null;
-    final String frontendServer = (frontendServerStarterPath == null || frontendServerStarterPath!.isEmpty)
-        ? artifacts.getArtifactPath(
-            Artifact.frontendServerSnapshotForEngineDartSdk,
-            platform: platform,
-          )
-        : frontendServerStarterPath!;
-    final List<String> command = <String>[
-      artifacts.getArtifactPath(Artifact.engineDartBinary, platform: platform),
-      '--disable-dart-dev',
-      frontendServer,
+    late final List<String> commandToStartFrontendServer;
+    if (frontendServerStarterPath != null && frontendServerStarterPath!.isNotEmpty) {
+      commandToStartFrontendServer = <String>[
+        artifacts.getArtifactPath(Artifact.engineDartBinary, platform: platform),
+        '--disable-dart-dev',
+        frontendServerStarterPath!,
+      ];
+    } else {
+      commandToStartFrontendServer = <String>[
+        artifacts.getArtifactPath(Artifact.engineDartAotRuntime, platform: platform),
+        '--disable-dart-dev',
+        artifacts.getArtifactPath(
+          Artifact.frontendServerSnapshotForEngineDartSdk,
+          platform: platform,
+        ),
+      ];
+    }
+
+    final List<String> command = commandToStartFrontendServer + <String>[
       '--sdk-root',
       sdkRoot,
       '--incremental',

packages/flutter_tools/test/general.shard/artifacts_test.dart

@@ -143,7 +143,8 @@ void main() {
       );
       expect(
         artifacts.getArtifactPath(Artifact.frontendServerSnapshotForEngineDartSdk),
-        fileSystem.path.join('root', 'bin', 'cache', 'dart-sdk', 'bin', 'snapshots', 'frontend_server.dart.snapshot')
+        fileSystem.path.join('root', 'bin', 'cache', 'dart-sdk', 'bin',
+          'snapshots', 'frontend_server_aot.dart.snapshot')
       );
     });
 
@@ -325,7 +326,7 @@ void main() {
       expect(
         artifacts.getArtifactPath(Artifact.frontendServerSnapshotForEngineDartSdk),
         fileSystem.path.join('/out', 'host_debug_unopt', 'dart-sdk', 'bin',
-          'snapshots', 'frontend_server.dart.snapshot')
+          'snapshots', 'frontend_server_aot.dart.snapshot')
       );
 
 
@@ -397,7 +398,7 @@ void main() {
           Artifact.frontendServerSnapshotForEngineDartSdk,
           platform: TargetPlatform.web_javascript),
         fileSystem.path.join('/flutter', 'prebuilts', 'linux-x64', 'dart-sdk', 'bin',
-          'snapshots', 'frontend_server.dart.snapshot'),
+          'snapshots', 'frontend_server_aot.dart.snapshot'),
       );
       expect(
         artifacts.getArtifactPath(

packages/flutter_tools/test/general.shard/build_system/targets/common_test.dart

@@ -94,7 +94,7 @@ native-assets: {}
     );
     processManager.addCommands(<FakeCommand>[
       FakeCommand(command: <String>[
-        artifacts.getArtifactPath(Artifact.engineDartBinary),
+        artifacts.getArtifactPath(Artifact.engineDartAotRuntime),
         '--disable-dart-dev',
         artifacts.getArtifactPath(Artifact.frontendServerSnapshotForEngineDartSdk),
         '--sdk-root',
@@ -139,7 +139,7 @@ native-assets: {}
     );
     processManager.addCommands(<FakeCommand>[
       FakeCommand(command: <String>[
-        artifacts.getArtifactPath(Artifact.engineDartBinary),
+        artifacts.getArtifactPath(Artifact.engineDartAotRuntime),
         '--disable-dart-dev',
         artifacts.getArtifactPath(Artifact.frontendServerSnapshotForEngineDartSdk),
         '--sdk-root',
@@ -185,7 +185,7 @@ native-assets: {}
     );
     processManager.addCommands(<FakeCommand>[
       FakeCommand(command: <String>[
-        artifacts.getArtifactPath(Artifact.engineDartBinary),
+        artifacts.getArtifactPath(Artifact.engineDartAotRuntime),
         '--disable-dart-dev',
         artifacts.getArtifactPath(Artifact.frontendServerSnapshotForEngineDartSdk),
         '--sdk-root',
@@ -279,7 +279,7 @@ native-assets: {}
     );
     processManager.addCommands(<FakeCommand>[
       FakeCommand(command: <String>[
-        artifacts.getArtifactPath(Artifact.engineDartBinary),
+        artifacts.getArtifactPath(Artifact.engineDartAotRuntime),
         '--disable-dart-dev',
         artifacts.getArtifactPath(Artifact.frontendServerSnapshotForEngineDartSdk),
         '--sdk-root',
@@ -328,7 +328,7 @@ native-assets: {}
     );
     processManager.addCommands(<FakeCommand>[
       FakeCommand(command: <String>[
-        artifacts.getArtifactPath(Artifact.engineDartBinary),
+        artifacts.getArtifactPath(Artifact.engineDartAotRuntime),
         '--disable-dart-dev',
         artifacts.getArtifactPath(Artifact.frontendServerSnapshotForEngineDartSdk),
         '--sdk-root',
@@ -375,7 +375,7 @@ native-assets: {}
     );
     processManager.addCommands(<FakeCommand>[
       FakeCommand(command: <String>[
-        artifacts.getArtifactPath(Artifact.engineDartBinary),
+        artifacts.getArtifactPath(Artifact.engineDartAotRuntime),
         '--disable-dart-dev',
         artifacts.getArtifactPath(Artifact.frontendServerSnapshotForEngineDartSdk),
         '--sdk-root',
@@ -434,7 +434,7 @@ native-assets: {}
     );
     processManager.addCommands(<FakeCommand>[
       FakeCommand(command: <String>[
-        artifacts.getArtifactPath(Artifact.engineDartBinary),
+        artifacts.getArtifactPath(Artifact.engineDartAotRuntime),
         '--disable-dart-dev',
         artifacts.getArtifactPath(Artifact.frontendServerSnapshotForEngineDartSdk),
         '--sdk-root',

packages/flutter_tools/test/general.shard/compile_batch_test.dart

@@ -53,7 +53,7 @@ void main() {
       logger: logger,
       processManager: FakeProcessManager.list(<FakeCommand>[
         FakeCommand(command: const <String>[
-         'Artifact.engineDartBinary',
+          'Artifact.engineDartAotRuntime',
           '--disable-dart-dev',
           'Artifact.frontendServerSnapshotForEngineDartSdk',
           '--sdk-root',
@@ -99,7 +99,7 @@ void main() {
       logger: logger,
       processManager: FakeProcessManager.list(<FakeCommand>[
         FakeCommand(command: const <String>[
-         'Artifact.engineDartBinary',
+          'Artifact.engineDartAotRuntime',
           '--disable-dart-dev',
           'Artifact.frontendServerSnapshotForEngineDartSdk',
           '--sdk-root',
@@ -145,7 +145,7 @@ void main() {
       logger: logger,
       processManager: FakeProcessManager.list(<FakeCommand>[
         FakeCommand(command: const <String>[
-         'Artifact.engineDartBinary',
+          'Artifact.engineDartAotRuntime',
           '--disable-dart-dev',
           'Artifact.frontendServerSnapshotForEngineDartSdk',
           '--sdk-root',
@@ -191,7 +191,7 @@ void main() {
       logger: logger,
       processManager: FakeProcessManager.list(<FakeCommand>[
         FakeCommand(command: const <String>[
-          'Artifact.engineDartBinary',
+          'Artifact.engineDartAotRuntime',
           '--disable-dart-dev',
           'Artifact.frontendServerSnapshotForEngineDartSdk',
           '--sdk-root',
@@ -239,7 +239,7 @@ void main() {
       logger: logger,
       processManager: FakeProcessManager.list(<FakeCommand>[
         FakeCommand(command: const <String>[
-          'Artifact.engineDartBinary',
+          'Artifact.engineDartAotRuntime',
           '--disable-dart-dev',
           'Artifact.frontendServerSnapshotForEngineDartSdk',
           '--sdk-root',
@@ -287,7 +287,7 @@ void main() {
       logger: logger,
       processManager: FakeProcessManager.list(<FakeCommand>[
         FakeCommand(command: const <String>[
-          'Artifact.engineDartBinary',
+          'Artifact.engineDartAotRuntime',
           '--disable-dart-dev',
           'Artifact.frontendServerSnapshotForEngineDartSdk',
           '--sdk-root',
@@ -339,7 +339,7 @@ void main() {
       logger: logger,
       processManager: FakeProcessManager.list(<FakeCommand>[
         FakeCommand(command: const <String>[
-          'Artifact.engineDartBinary',
+          'Artifact.engineDartAotRuntime',
           '--disable-dart-dev',
           'Artifact.frontendServerSnapshotForEngineDartSdk',
           '--sdk-root',
@@ -389,7 +389,7 @@ void main() {
       logger: logger,
       processManager: FakeProcessManager.list(<FakeCommand>[
         FakeCommand(command: const <String>[
-          'Artifact.engineDartBinary',
+          'Artifact.engineDartAotRuntime',
           '--disable-dart-dev',
           'Artifact.frontendServerSnapshotForEngineDartSdk',
           '--sdk-root',
@@ -449,7 +449,7 @@ void main() {
       logger: logger,
       processManager: FakeProcessManager.list(<FakeCommand>[
         FakeCommand(command: const <String>[
-          'Artifact.engineDartBinary',
+          'Artifact.engineDartAotRuntime',
           '--disable-dart-dev',
           'Artifact.frontendServerSnapshotForEngineDartSdk',
           '--sdk-root',

packages/flutter_tools/test/general.shard/compile_incremental_test.dart

@@ -30,7 +30,7 @@ void main() {
   late FakeProcessManager fakeProcessManager;
 
   const List<String> frontendServerCommand = <String>[
-    'Artifact.engineDartBinary',
+    'Artifact.engineDartAotRuntime',
     '--disable-dart-dev',
     'Artifact.frontendServerSnapshotForEngineDartSdk',
     '--sdk-root',

packages/flutter_tools/test/general.shard/test/web_test_compiler_test.dart

@@ -36,7 +36,7 @@ void main() {
     );
     final FakeProcessManager processManager = FakeProcessManager.list(<FakeCommand>[
       FakeCommand(command: <Pattern>[
-        'Artifact.engineDartBinary.TargetPlatform.web_javascript',
+        'Artifact.engineDartAotRuntime.TargetPlatform.web_javascript',
         '--disable-dart-dev',
         'Artifact.frontendServerSnapshotForEngineDartSdk.TargetPlatform.web_javascript',
         '--sdk-root',