pass --skip-build-script-checks and remove module usage (#28343)

packages/flutter_build/build.yaml

 # Read about `build.yaml` at https://pub.dartlang.org/packages/build_config
 builders:
-  flutter:
-    import: "package:build_modules/builders.dart"
-    builder_factories:
-      - metaModuleBuilderFactoryForPlatform('flutter')
-      - metaModuleCleanBuilderFactoryForPlatform('flutter')
-      - moduleBuilderFactoryForPlatform('flutter')
-    applies_builders: ["build_modules|module_cleanup"]
-    build_extensions:
-      $lib$:
-        - .flutter.meta_module.raw
-        - .flutter.meta_module.clean
-      .dart:
-        - .flutter.module
-    auto_apply: all_packages
-    required_inputs: [".dart", ".module.library"]
   kernel:
     import: "package:flutter_build/flutter_build.dart"
     builder_factories:

packages/flutter_build/lib/src/kernel_builder.dart

@@ -7,8 +7,6 @@
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
-
-import 'package:build_modules/build_modules.dart';
 import 'package:build/build.dart';
 import 'package:package_config/packages_file.dart' as packages_file;
 import 'package:meta/meta.dart';
@@ -16,6 +14,7 @@ import 'package:path/path.dart' as path;
 
 const String _kFlutterDillOutputExtension = '.app.dill';
 const String _kPackagesExtension = '.packages';
+const String _kMultirootScheme = 'org-dartlang-app';
 
 /// A builder which creates a kernel and packages file for a Flutter app.
 ///
@@ -85,28 +84,13 @@ class FlutterKernelBuilder implements Builder {
   @override
   Future<void> build(BuildStep buildStep) async {
     // Do not resolve dependencies if this does not correspond to the main
-    // entrypoint.
-    if (!mainPath.contains(buildStep.inputId.path)) {
+    // entrypoint. Do not generate kernel if it has been disabled.
+    if (!mainPath.contains(buildStep.inputId.path) || disabled) {
       return;
     }
     final AssetId outputId = buildStep.inputId.changeExtension(_kFlutterDillOutputExtension);
     final AssetId packagesOutputId = buildStep.inputId.changeExtension(_kPackagesExtension);
 
-    // Use modules to verify dependencies are sound.
-    final AssetId moduleId = buildStep.inputId.changeExtension(moduleExtension(DartPlatform.flutter));
-    final Module module = Module.fromJson(json.decode(await buildStep.readAsString(moduleId)));
-    try {
-      await module.computeTransitiveDependencies(buildStep);
-    } on MissingModulesException catch (err) {
-      log.shout(err);
-      return;
-    }
-
-    // Do not generate kernel if it has been disabled.
-    if (disabled) {
-      return;
-    }
-
     // Create a scratch space file that can be read/written by the frontend server.
     // It is okay to hard-code these file names because we will copy them back
     // from the temp directory at the end of the build step.
@@ -122,7 +106,7 @@ class FlutterKernelBuilder implements Builder {
     // Note: currently we only replace the root package with a multiroot
     // scheme. To support codegen on arbitrary packages we will need to do
     // this for each dependency.
-    final String newPackagesContents = oldPackagesContents.replaceFirst('$packageName:lib/', '$packageName:$multiRootScheme:/');
+    final String newPackagesContents = oldPackagesContents.replaceFirst('$packageName:lib/', '$packageName:$_kMultirootScheme:/');
     await packagesFile.writeAsString(newPackagesContents);
     String absoluteMainPath;
     if (path.isAbsolute(mainPath)) {
@@ -167,7 +151,7 @@ class FlutterKernelBuilder implements Builder {
       '--filesystem-root',
       generatedRoot,
       '--filesystem-scheme',
-      multiRootScheme,
+      _kMultirootScheme,
     ]);
     if (extraFrontEndOptions != null) {
       arguments.addAll(extraFrontEndOptions);
@@ -175,7 +159,7 @@ class FlutterKernelBuilder implements Builder {
     final Uri mainUri = _PackageUriMapper.findUri(
       absoluteMainPath,
       packagesFile.path,
-      multiRootScheme,
+      _kMultirootScheme,
       <String>[normalRoot, generatedRoot],
     );
     arguments.add(mainUri?.toString() ?? absoluteMainPath);

packages/flutter_build/pubspec.yaml

@@ -7,38 +7,26 @@ environment:
 dependencies:
   # To update these, use "flutter update-packages --force-upgrade".
   build: 1.1.1
-  build_modules: 1.0.8
   package_config: 1.0.5
   path: 1.6.2
 
   analyzer: 0.35.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   args: 1.5.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   async: 2.0.8 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  bazel_worker: 0.1.20 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  build_config: 0.3.1+4 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   charcode: 1.1.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   collection: 1.14.11 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   convert: 2.1.1 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   crypto: 2.0.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   csslib: 0.14.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  fixnum: 0.10.9 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   front_end: 0.1.12 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   glob: 1.1.7 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  graphs: 0.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   html: 0.13.3+3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  json_annotation: 2.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   kernel: 0.3.12 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   logging: 0.11.3+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   meta: 1.1.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  pedantic: 1.5.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   plugin: 0.2.0+3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  pool: 1.4.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  protobuf: 0.13.4 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   pub_semver: 1.4.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  pubspec_parse: 0.1.4 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  scratch_space: 0.0.3+2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   source_span: 1.5.4 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
-  stack_trace: 1.9.3 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   string_scanner: 1.0.4 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   term_glyph: 1.1.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   typed_data: 1.1.6 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -50,4 +38,4 @@ dartdoc:
   # Exclude this package from the hosted API docs.
   nodoc: true
 
-# PUBSPEC CHECKSUM: 3267
+# PUBSPEC CHECKSUM: 6ccf

packages/flutter_tools/lib/src/build_runner/build_runner.dart

@@ -72,6 +72,7 @@ class BuildRunner extends CodeGenerator {
         '--packages=$scriptPackagesPath',
         buildScript,
         'build',
+        '--skip-build-script-check',
         '--define', 'flutter_build|kernel=disabled=$disableKernelGeneration',
         '--define', 'flutter_build|kernel=aot=$aot',
         '--define', 'flutter_build|kernel=linkPlatformKernelIn=$linkPlatformKernelIn',
@@ -157,9 +158,11 @@ class BuildRunner extends CodeGenerator {
       stringBuffer.writeln('name: flutter_tool');
       stringBuffer.writeln('dependencies:');
       final YamlMap builders = await flutterProject.builders;
-      for (String name in builders.keys) {
-        final YamlNode node = builders[name];
-        stringBuffer.writeln('  $name: $node');
+      if (builders != null) {
+        for (String name in builders.keys) {
+          final YamlNode node = builders[name];
+          stringBuffer.writeln('  $name: $node');
+        }
       }
       stringBuffer.writeln('  build_runner: any');
       stringBuffer.writeln('  flutter_build:');
@@ -217,6 +220,7 @@ class BuildRunner extends CodeGenerator {
         '--packages=$scriptPackagesPath',
         buildScript,
         'daemon',
+         '--skip-build-script-check',
         '--define', 'flutter_build|kernel=disabled=false',
         '--define', 'flutter_build|kernel=aot=false',
         '--define', 'flutter_build|kernel=linkPlatformKernelIn=$linkPlatformKernelIn',
@@ -251,18 +255,22 @@ class _BuildRunnerCodegenDaemon implements CodegenDaemon {
   final File packagesFile;
   @override
   final File dillFile;
+  @override
+  CodegenStatus get lastStatus => _lastStatus;
+  CodegenStatus _lastStatus;
 
   @override
   Stream<CodegenStatus> get buildResults => buildDaemonClient.buildResults.map((build.BuildResults results) {
     if (results.results.first.status == BuildStatus.failed) {
-      return CodegenStatus.Failed;
+      return _lastStatus = CodegenStatus.Failed;
     }
     if (results.results.first.status == BuildStatus.started) {
-      return CodegenStatus.Started;
+      return _lastStatus = CodegenStatus.Started;
     }
     if (results.results.first.status == BuildStatus.succeeded) {
-      return CodegenStatus.Succeeded;
+      return _lastStatus = CodegenStatus.Succeeded;
     }
+    _lastStatus = null;
     return null;
   });
 

packages/flutter_tools/lib/src/codegen.dart

@@ -134,6 +134,8 @@ abstract class CodegenDaemon {
   /// Whether the previously enqueued build was successful.
   Stream<CodegenStatus> get buildResults;
 
+  CodegenStatus get lastStatus;
+
   /// Starts a new build.
   void startBuild();
 
@@ -265,11 +267,12 @@ class CodeGeneratingResidentCompiler implements ResidentCompiler {
 
   @override
   Future<CompilerOutput> recompile(String mainPath, List<String> invalidatedFiles, {String outputPath, String packagesFilePath}) async {
-    _codegenDaemon.startBuild();
-    final CodegenStatus status = await _codegenDaemon.buildResults.firstWhere((CodegenStatus status) {
-      return status ==CodegenStatus.Succeeded || status == CodegenStatus.Failed;
-    });
-    if (status == CodegenStatus.Failed) {
+    if (_codegenDaemon.lastStatus != CodegenStatus.Succeeded && _codegenDaemon.lastStatus != CodegenStatus.Failed) {
+      await _codegenDaemon.buildResults.firstWhere((CodegenStatus status) {
+        return status ==CodegenStatus.Succeeded || status == CodegenStatus.Failed;
+      });
+    }
+    if (_codegenDaemon.lastStatus == CodegenStatus.Failed) {
       printError('Codegeneration failed, halting build.');
     }
     // Delete this file so that the frontend_server can handle multi-root.

packages/flutter_tools/pubspec.yaml

@@ -51,7 +51,7 @@ dependencies:
   code_builder: 3.2.0
   build: 1.1.1
   build_modules: 1.0.8
-  build_daemon: 0.4.0
+  build_daemon: 0.4.1
 
   async: 2.0.8 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   bazel_worker: 0.1.20 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -115,4 +115,4 @@ dartdoc:
   # Exclude this package from the hosted API docs.
   nodoc: true
 
-# PUBSPEC CHECKSUM: 43e3
+# PUBSPEC CHECKSUM: e6e4