Standardize build system environment defines derived from build info (#81879)

dev/devicelab/bin/tasks/build_ios_framework_module_test.dart

@@ -102,7 +102,9 @@ Future<void> _testBuildIosFramework(Directory projectDir, { bool isModule = fals
       options: <String>[
         'ios-framework',
         '--verbose',
-        '--output=$outputDirectoryName'
+        '--output=$outputDirectoryName',
+        '--obfuscate',
+        '--split-debug-info=symbols',
       ],
     );
   });
@@ -189,6 +191,20 @@ Future<void> _testBuildIosFramework(Directory projectDir, { bool isModule = fals
     'vm_snapshot_data',
   ));
 
+  section('Check obfuscation symbols');
+
+  checkFileExists(path.join(
+    projectDir.path,
+    'symbols',
+    'app.ios-arm64.symbols',
+  ));
+
+  checkFileExists(path.join(
+    projectDir.path,
+    'symbols',
+    'app.ios-armv7.symbols',
+  ));
+
   section('Check debug build has no Dart AOT');
 
   final String aotSymbols = await _dylibSymbols(debugAppFrameworkPath);

packages/flutter_tools/lib/src/build_info.dart

@@ -24,7 +24,7 @@ class BuildInfo {
     this.trackWidgetCreation = false,
     List<String>? extraFrontEndOptions,
     List<String>? extraGenSnapshotOptions,
-    this.fileSystemRoots,
+    List<String>? fileSystemRoots,
     this.fileSystemScheme,
     this.buildNumber,
     this.buildName,
@@ -42,6 +42,7 @@ class BuildInfo {
     this.packageConfig = PackageConfig.empty,
   }) : extraFrontEndOptions = extraFrontEndOptions ?? const <String>[],
        extraGenSnapshotOptions = extraGenSnapshotOptions ?? const <String>[],
+       fileSystemRoots = fileSystemRoots ?? const <String>[],
        dartDefines = dartDefines ?? const <String>[],
        dartExperiments = dartExperiments ?? const <String>[];
 
@@ -69,7 +70,7 @@ class BuildInfo {
   /// file. If not provided, defaults to `.packages`.
   final String packagesPath;
 
-  final List<String>? fileSystemRoots;
+  final List<String> fileSystemRoots;
   final String? fileSystemScheme;
 
   /// Whether the build should track widget creation locations.
@@ -185,6 +186,40 @@ class BuildInfo {
   /// so the lower cased flavor name is used to compute the output file name
   String? get lowerCasedFlavor => flavor?.toLowerCase();
 
+  /// Convert to a structured string encoded structure appropriate for usage
+  /// in build system [Environment.defines].
+  ///
+  /// Fields that are `null` are excluded from this configuration.
+  Map<String, String> toBuildSystemEnvironment() {
+    // packagesPath and performanceMeasurementFile are not passed into
+    // the Environment map.
+    return <String, String>{
+      kBuildMode: getNameForBuildMode(mode),
+      if (dartDefines.isNotEmpty)
+        kDartDefines: encodeDartDefines(dartDefines),
+      if (dartObfuscation != null)
+        kDartObfuscation: dartObfuscation.toString(),
+      if (extraFrontEndOptions.isNotEmpty)
+        kExtraFrontEndOptions: extraFrontEndOptions.join(','),
+      if (extraGenSnapshotOptions.isNotEmpty)
+        kExtraGenSnapshotOptions: extraGenSnapshotOptions.join(','),
+      if (splitDebugInfoPath != null)
+        kSplitDebugInfo: splitDebugInfoPath!,
+      if (trackWidgetCreation != null)
+        kTrackWidgetCreation: trackWidgetCreation.toString(),
+      if (treeShakeIcons != null)
+        kIconTreeShakerFlag: treeShakeIcons.toString(),
+      if (bundleSkSLPath != null)
+        kBundleSkSLPath: bundleSkSLPath!,
+      if (codeSizeDirectory != null)
+        kCodeSizeDirectory: codeSizeDirectory!,
+      if (fileSystemRoots.isNotEmpty)
+        kFileSystemRoots: fileSystemRoots.join(','),
+      if (fileSystemScheme != null)
+        kFileSystemScheme: fileSystemScheme!,
+    };
+  }
+
   /// Convert to a structured string encoded structure appropriate for usage as
   /// environment variables or to embed in other scripts.
   ///
@@ -774,6 +809,87 @@ String getFuchsiaBuildDirectory() {
 /// These values are URI-encoded and then combined into a comma-separated string.
 const String kDartDefines = 'DartDefines';
 
+/// The define to pass a [BuildMode].
+const String kBuildMode = 'BuildMode';
+
+/// The define to pass whether we compile 64-bit android-arm code.
+const String kTargetPlatform = 'TargetPlatform';
+
+/// The define to control what target file is used.
+const String kTargetFile = 'TargetFile';
+
+/// The define to control whether the AOT snapshot is built with bitcode.
+const String kBitcodeFlag = 'EnableBitcode';
+
+/// Whether to enable or disable track widget creation.
+const String kTrackWidgetCreation = 'TrackWidgetCreation';
+
+/// Additional configuration passed to the dart front end.
+///
+/// This is expected to be a comma separated list of strings.
+const String kExtraFrontEndOptions = 'ExtraFrontEndOptions';
+
+/// Additional configuration passed to gen_snapshot.
+///
+/// This is expected to be a comma separated list of strings.
+const String kExtraGenSnapshotOptions = 'ExtraGenSnapshotOptions';
+
+/// Whether the build should run gen_snapshot as a split aot build for deferred
+/// components.
+const String kDeferredComponents = 'DeferredComponents';
+
+/// Whether to strip source code information out of release builds and where to save it.
+const String kSplitDebugInfo = 'SplitDebugInfo';
+
+/// Alternative scheme for file URIs.
+///
+/// May be used along with [kFileSystemRoots] to support a multi-root
+/// filesystem.
+const String kFileSystemScheme = 'FileSystemScheme';
+
+/// Additional filesystem roots.
+///
+/// If provided, must be used along with [kFileSystemScheme].
+const String kFileSystemRoots = 'FileSystemRoots';
+
+/// The define to control what iOS architectures are built for.
+///
+/// This is expected to be a space-delimited list of architectures. If not
+/// provided, defaults to arm64.
+///
+/// The other supported value is armv7, the 32-bit iOS architecture.
+const String kIosArchs = 'IosArchs';
+
+/// The define to control what macOS architectures are built for.
+///
+/// This is expected to be a space-delimited list of architectures. If not
+/// provided, defautls to x86_64.
+///
+/// Supported values are x86_64 and arm64.
+const String kDarwinArchs = 'DarwinArchs';
+
+/// Path to the SDK root to be used as the isysroot.
+const String kSdkRoot = 'SdkRoot';
+
+/// Whether to enable Dart obfuscation and where to save the symbol map.
+const String kDartObfuscation = 'DartObfuscation';
+
+/// An output directory where one or more code-size measurements may be written.
+const String kCodeSizeDirectory = 'CodeSizeDirectory';
+
+/// SHA identifier of the Apple developer code signing identity.
+///
+/// Same as EXPANDED_CODE_SIGN_IDENTITY Xcode build setting.
+/// Also discoverable via `security find-identity -p codesigning`.
+const String kCodesignIdentity = 'CodesignIdentity';
+
+/// The build define controlling whether icon fonts should be stripped down to
+/// only the glyphs used by the application.
+const String kIconTreeShakerFlag = 'TreeShakeIcons';
+
+/// The input key for an SkSL bundle path.
+const String kBundleSkSLPath = 'BundleSkSLPath';
+
 final Converter<String, String> _defineEncoder = utf8.encoder.fuse(base64.encoder);
 final Converter<String, String> _defineDecoder = base64.decoder.fuse(utf8.decoder);
 

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

@@ -18,9 +18,6 @@ import '../depfile.dart';
 import 'common.dart';
 import 'icon_tree_shaker.dart';
 
-/// The input key for an SkSL bundle path.
-const String kBundleSkSLPath = 'BundleSkSLPath';
-
 /// A helper function to copy an asset bundle into an [environment]'s output
 /// directory.
 ///

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

@@ -21,80 +21,6 @@ import 'dart_plugin_registrant.dart';
 import 'icon_tree_shaker.dart';
 import 'localizations.dart';
 
-/// The define to pass a [BuildMode].
-const String kBuildMode = 'BuildMode';
-
-/// The define to pass whether we compile 64-bit android-arm code.
-const String kTargetPlatform = 'TargetPlatform';
-
-/// The define to control what target file is used.
-const String kTargetFile = 'TargetFile';
-
-/// The define to control whether the AOT snapshot is built with bitcode.
-const String kBitcodeFlag = 'EnableBitcode';
-
-/// Whether to enable or disable track widget creation.
-const String kTrackWidgetCreation = 'TrackWidgetCreation';
-
-/// Additional configuration passed to the dart front end.
-///
-/// This is expected to be a comma separated list of strings.
-const String kExtraFrontEndOptions = 'ExtraFrontEndOptions';
-
-/// Additional configuration passed to gen_snapshot.
-///
-/// This is expected to be a comma separated list of strings.
-const String kExtraGenSnapshotOptions = 'ExtraGenSnapshotOptions';
-
-/// Whether the build should run gen_snapshot as a split aot build for deferred
-/// components.
-const String kDeferredComponents = 'DeferredComponents';
-
-/// Whether to strip source code information out of release builds and where to save it.
-const String kSplitDebugInfo = 'SplitDebugInfo';
-
-/// Alternative scheme for file URIs.
-///
-/// May be used along with [kFileSystemRoots] to support a multi-root
-/// filesystem.
-const String kFileSystemScheme = 'FileSystemScheme';
-
-/// Additional filesystem roots.
-///
-/// If provided, must be used along with [kFileSystemScheme].
-const String kFileSystemRoots = 'FileSystemRoots';
-
-/// The define to control what iOS architectures are built for.
-///
-/// This is expected to be a space-delimited list of architectures. If not
-/// provided, defaults to arm64.
-///
-/// The other supported value is armv7, the 32-bit iOS architecture.
-const String kIosArchs = 'IosArchs';
-
-/// The define to control what macOS architectures are built for.
-///
-/// This is expected to be a space-delimited list of architectures. If not
-/// provided, defautls to x86_64.
-///
-/// Supported values are x86_64 and arm64.
-const String kDarwinArchs = 'DarwinArchs';
-
-/// Path to the SDK root to be used as the isysroot.
-const String kSdkRoot = 'SdkRoot';
-
-/// Whether to enable Dart obfuscation and where to save the symbol map.
-const String kDartObfuscation = 'DartObfuscation';
-
-/// An output directory where one or more code-size measurements may be written.
-const String kCodeSizeDirectory = 'CodeSizeDirectory';
-
-/// SHA identifier of the Apple developer code signing identity.
-///
-/// Same as EXPANDED_CODE_SIGN_IDENTITY Xcode build setting.
-/// Also discoverable via `security find-identity -p codesigning`.
-const String kCodesignIdentity = 'CodesignIdentity';
-
 /// Copies the pre-built flutter bundle.
 // This is a one-off rule for implementing build bundle in terms of assemble.
 class CopyFlutterBundle extends Target {

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

@@ -13,7 +13,6 @@ import '../../dart/package_map.dart';
 import '../../flutter_plugins.dart';
 import '../../project.dart';
 import '../build_system.dart';
-import 'common.dart';
 
 /// Generates a new `./dart_tool/flutter_build/generated_main.dart`
 /// based on the current dependency map in `pubspec.lock`.

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

@@ -13,14 +13,10 @@ import '../../base/common.dart';
 import '../../base/file_system.dart';
 import '../../base/io.dart';
 import '../../base/logger.dart';
+import '../../build_info.dart';
 import '../../convert.dart';
 import '../../devfs.dart';
 import '../build_system.dart';
-import 'common.dart';
-
-/// The build define controlling whether icon fonts should be stripped down to
-/// only the glyphs used by the application.
-const String kIconTreeShakerFlag = 'TreeShakeIcons';
 
 List<Map<String, dynamic>> _getList(dynamic object, String errorMessage) {
   if (object is List<dynamic>) {

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

@@ -22,7 +22,6 @@ import '../../project.dart';
 import '../build_system.dart';
 import '../depfile.dart';
 import 'assets.dart';
-import 'common.dart';
 import 'localizations.dart';
 
 /// Whether the application has web plugins.

packages/flutter_tools/lib/src/bundle.dart

@@ -18,7 +18,6 @@ import 'build_info.dart';
 import 'build_system/build_system.dart';
 import 'build_system/depfile.dart';
 import 'build_system/targets/common.dart';
-import 'build_system/targets/icon_tree_shaker.dart';
 import 'cache.dart';
 import 'convert.dart';
 import 'devfs.dart';
@@ -110,27 +109,11 @@ class BundleBuilder {
           ? null
           : globals.flutterVersion.engineRevision,
       defines: <String, String>{
-        // used by by the CopyFlutterBundle target
-        kBuildMode: getNameForBuildMode(buildInfo.mode),
-
         // used by the KernelSnapshot target
         kTargetPlatform: getNameForTargetPlatform(platform),
         kTargetFile: mainPath,
-        kTrackWidgetCreation: buildInfo.trackWidgetCreation.toString(),
-        if (buildInfo.extraFrontEndOptions.isNotEmpty)
-          kExtraFrontEndOptions: buildInfo.extraFrontEndOptions.join(','),
-        if (buildInfo.extraGenSnapshotOptions.isNotEmpty)
-          kExtraGenSnapshotOptions: buildInfo.extraGenSnapshotOptions.join(','),
-        if (buildInfo.fileSystemRoots != null && buildInfo.fileSystemRoots.isNotEmpty)
-          kFileSystemRoots: buildInfo.fileSystemRoots?.join(','),
-        kFileSystemScheme: buildInfo.fileSystemScheme,
-        if (buildInfo.dartDefines.isNotEmpty)
-          kDartDefines: encodeDartDefines(buildInfo.dartDefines),
-
-        // used by the CopyFlutterBundle target too, inside the copyAssets
-        // call after the snapshot was built
-        kIconTreeShakerFlag: buildInfo.treeShakeIcons.toString(),
-        kDeferredComponents: 'false'
+        kDeferredComponents: 'false',
+        ...buildInfo.toBuildSystemEnvironment(),
       },
       artifacts: globals.artifacts,
       fileSystem: globals.fs,

packages/flutter_tools/lib/src/commands/build_ios_framework.dart

@@ -15,8 +15,6 @@ import '../base/process.dart';
 import '../base/utils.dart';
 import '../build_info.dart';
 import '../build_system/build_system.dart';
-import '../build_system/targets/common.dart';
-import '../build_system/targets/icon_tree_shaker.dart';
 import '../build_system/targets/ios.dart';
 import '../cache.dart';
 import '../flutter_plugins.dart';
@@ -362,20 +360,13 @@ end
           flutterRootDir: globals.fs.directory(Cache.flutterRoot),
           defines: <String, String>{
             kTargetFile: targetFile,
-            kBuildMode: getNameForBuildMode(buildInfo.mode),
             kTargetPlatform: getNameForTargetPlatform(TargetPlatform.ios),
-            kIconTreeShakerFlag: buildInfo.treeShakeIcons.toString(),
-            kDartDefines: encodeDartDefines(buildInfo.dartDefines),
             kBitcodeFlag: 'true',
-            if (buildInfo?.extraGenSnapshotOptions?.isNotEmpty ?? false)
-              kExtraGenSnapshotOptions:
-                  buildInfo.extraGenSnapshotOptions.join(','),
-            if (buildInfo?.extraFrontEndOptions?.isNotEmpty ?? false)
-              kExtraFrontEndOptions: buildInfo.extraFrontEndOptions.join(','),
             kIosArchs: defaultIOSArchsForEnvironment(sdkType)
                 .map(getNameForDarwinArch)
                 .join(' '),
             kSdkRoot: await globals.xcode.sdkLocation(sdkType),
+            ...buildInfo.toBuildSystemEnvironment(),
           },
           artifacts: globals.artifacts,
           fileSystem: globals.fs,

packages/flutter_tools/lib/src/runner/flutter_command.dart

@@ -18,7 +18,6 @@ import '../base/user_messages.dart';
 import '../base/utils.dart';
 import '../build_info.dart';
 import '../build_system/build_system.dart';
-import '../build_system/targets/common.dart' show kExtraFrontEndOptions, kExtraGenSnapshotOptions; // for deprecated option name aliases only
 import '../bundle.dart' as bundle;
 import '../cache.dart';
 import '../dart/generate_synthetic_packages.dart';

packages/flutter_tools/lib/src/web/compile.dart

@@ -10,8 +10,6 @@ import '../base/file_system.dart';
 import '../base/logger.dart';
 import '../build_info.dart';
 import '../build_system/build_system.dart';
-import '../build_system/targets/common.dart';
-import '../build_system/targets/icon_tree_shaker.dart';
 import '../build_system/targets/web.dart';
 import '../cache.dart';
 import '../flutter_plugins.dart';
@@ -48,18 +46,14 @@ Future<void> buildWeb(
         .childDirectory('.dart_tool')
         .childDirectory('flutter_build'),
       defines: <String, String>{
-        kBuildMode: getNameForBuildMode(buildInfo.mode),
         kTargetFile: target,
         kHasWebPlugins: hasWebPlugins.toString(),
-        kDartDefines: encodeDartDefines(buildInfo.dartDefines),
         kCspMode: csp.toString(),
-        kIconTreeShakerFlag: buildInfo.treeShakeIcons.toString(),
         kSourceMapsEnabled: sourceMaps.toString(),
         kNativeNullAssertions: nativeNullAssertions.toString(),
         if (serviceWorkerStrategy != null)
          kServiceWorkerStrategy: serviceWorkerStrategy,
-        if (buildInfo.extraFrontEndOptions?.isNotEmpty ?? false)
-          kExtraFrontEndOptions: buildInfo.extraFrontEndOptions.join(','),
+        ...buildInfo.toBuildSystemEnvironment(),
       },
       artifacts: globals.artifacts,
       fileSystem: globals.fs,

packages/flutter_tools/test/commands.shard/hermetic/build_web_test.dart

@@ -98,7 +98,7 @@ void main() {
     final BuildCommand buildCommand = BuildCommand();
     final CommandRunner<void> runner = createTestCommandRunner(buildCommand);
     setupFileSystemForEndToEndTest(fileSystem);
-    await runner.run(<String>['build', 'web', '--no-pub']);
+    await runner.run(<String>['build', 'web', '--no-pub', '--dart-define=foo=a']);
 
     expect(fileSystem.file(fileSystem.path.join('lib', 'generated_plugin_registrant.dart')).existsSync(), true);
   }, overrides: <Type, Generator>{
@@ -106,7 +106,21 @@ void main() {
     FileSystem: () => fileSystem,
     FeatureFlags: () => TestFeatureFlags(isWebEnabled: true),
     ProcessManager: () => FakeProcessManager.any(),
-    BuildSystem: () => TestBuildSystem.all(BuildResult(success: true)),
+    BuildSystem: () => TestBuildSystem.all(BuildResult(success: true), (Target target, Environment environment) {
+      expect(environment.defines, <String, String>{
+        'TargetFile': 'lib/main.dart',
+        'HasWebPlugins': 'true',
+        'cspMode': 'false',
+        'SourceMaps': 'false',
+        'NativeNullAssertions': 'true',
+        'ServiceWorkerStrategy': 'offline-first',
+        'BuildMode': 'release',
+        'DartDefines': 'Zm9vPWE=,RkxVVFRFUl9XRUJfQVVUT19ERVRFQ1Q9dHJ1ZQ==',
+        'DartObfuscation': 'false',
+        'TrackWidgetCreation': 'false',
+        'TreeShakeIcons': 'false',
+      });
+    }),
   });
 
   testUsingContext('hidden if feature flag is not enabled', () async {

packages/flutter_tools/test/commands.shard/permeable/build_bundle_test.dart

@@ -9,8 +9,6 @@ import 'package:file/memory.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/build_info.dart';
 import 'package:flutter_tools/src/build_system/build_system.dart';
-import 'package:flutter_tools/src/build_system/targets/common.dart';
-import 'package:flutter_tools/src/build_system/targets/icon_tree_shaker.dart';
 import 'package:flutter_tools/src/bundle.dart';
 import 'package:flutter_tools/src/cache.dart';
 import 'package:flutter_tools/src/commands/build_bundle.dart';
@@ -214,7 +212,8 @@ void main() {
         kTrackWidgetCreation: 'true',
         kFileSystemScheme: 'org-dartlang-root',
         kIconTreeShakerFlag: 'false',
-        kDeferredComponents: 'false'
+        kDeferredComponents: 'false',
+        kDartObfuscation: 'false',
       });
     }),
     FileSystem: () => MemoryFileSystem.test(),
@@ -244,7 +243,8 @@ void main() {
         kFileSystemScheme: 'org-dartlang-root',
         kDartDefines: 'Zm9vPWJhcg==',
         kIconTreeShakerFlag: 'false',
-        kDeferredComponents: 'false'
+        kDeferredComponents: 'false',
+        kDartObfuscation: 'false',
       });
     }),
     FileSystem: () => MemoryFileSystem.test(),
@@ -273,7 +273,8 @@ void main() {
         kTrackWidgetCreation: 'true',
         kFileSystemScheme: 'org-dartlang-root2',
         kIconTreeShakerFlag: 'false',
-        kDeferredComponents: 'false'
+        kDeferredComponents: 'false',
+        kDartObfuscation: 'false',
       });
     }),
     FileSystem: () => MemoryFileSystem.test(),
@@ -303,7 +304,8 @@ void main() {
         kFileSystemScheme: 'org-dartlang-root',
         kFileSystemRoots: 'test1,test2',
         kIconTreeShakerFlag: 'false',
-        kDeferredComponents: 'false'
+        kDeferredComponents: 'false',
+        kDartObfuscation: 'false',
       });
     }),
     FileSystem: () => MemoryFileSystem.test(),
@@ -333,7 +335,8 @@ void main() {
         kFileSystemScheme: 'org-dartlang-root',
         kExtraFrontEndOptions: '--testflag,--testflag2',
         kIconTreeShakerFlag: 'false',
-        kDeferredComponents: 'false'
+        kDeferredComponents: 'false',
+        kDartObfuscation: 'false',
       });
     }),
     FileSystem: () => MemoryFileSystem.test(),
@@ -363,7 +366,8 @@ void main() {
         kFileSystemScheme: 'org-dartlang-root',
         kExtraGenSnapshotOptions: '--testflag,--testflag2',
         kIconTreeShakerFlag: 'false',
-        kDeferredComponents: 'false'
+        kDeferredComponents: 'false',
+        kDartObfuscation: 'false',
       });
     }),
     FileSystem: () => MemoryFileSystem.test(),

packages/flutter_tools/test/general.shard/android/deferred_components_gen_snapshot_validator_test.dart

@@ -11,8 +11,8 @@ import 'package:flutter_tools/src/base/deferred_component.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/base/platform.dart';
+import 'package:flutter_tools/src/build_info.dart';
 import 'package:flutter_tools/src/build_system/build_system.dart';
-import 'package:flutter_tools/src/build_system/targets/common.dart';
 import 'package:flutter_tools/src/globals.dart' as globals;
 
 import '../../src/common.dart';

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

@@ -95,6 +95,38 @@ void main() {
     expect(() => getIOSArchForName('bogus'), throwsException);
   });
 
+  testWithoutContext('toBuildSystemEnvironment encoding of standard values', () {
+    const BuildInfo buildInfo = BuildInfo(BuildMode.debug, '',
+      treeShakeIcons: true,
+      trackWidgetCreation: true,
+      dartDefines: <String>['foo=2', 'bar=2'],
+      dartObfuscation: true,
+      splitDebugInfoPath: 'foo/',
+      extraFrontEndOptions: <String>['--enable-experiment=non-nullable', 'bar'],
+      extraGenSnapshotOptions: <String>['--enable-experiment=non-nullable', 'fizz'],
+      bundleSkSLPath: 'foo/bar/baz.sksl.json',
+      packagesPath: 'foo/.packages',
+      codeSizeDirectory: 'foo/code-size',
+      fileSystemRoots: <String>['test5', 'test6'],
+      fileSystemScheme: 'scheme',
+    );
+
+    expect(buildInfo.toBuildSystemEnvironment(), <String, String>{
+      'BuildMode': 'debug',
+      'DartDefines': 'Zm9vPTI=,YmFyPTI=',
+      'DartObfuscation': 'true',
+      'ExtraFrontEndOptions': '--enable-experiment=non-nullable,bar',
+      'ExtraGenSnapshotOptions': '--enable-experiment=non-nullable,fizz',
+      'SplitDebugInfo': 'foo/',
+      'TrackWidgetCreation': 'true',
+      'TreeShakeIcons': 'true',
+      'BundleSkSLPath': 'foo/bar/baz.sksl.json',
+      'CodeSizeDirectory': 'foo/code-size',
+      'FileSystemRoots': 'test5,test6',
+      'FileSystemScheme': 'scheme',
+    });
+  });
+
   testWithoutContext('toEnvironmentConfig encoding of standard values', () {
     const BuildInfo buildInfo = BuildInfo(BuildMode.debug, '',
       treeShakeIcons: true,

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

@@ -15,8 +15,6 @@ import 'package:flutter_tools/src/build_info.dart';
 import 'package:flutter_tools/src/build_system/build_system.dart';
 import 'package:flutter_tools/src/build_system/depfile.dart';
 import 'package:flutter_tools/src/build_system/targets/android.dart';
-import 'package:flutter_tools/src/build_system/targets/assets.dart';
-import 'package:flutter_tools/src/build_system/targets/common.dart';
 import 'package:flutter_tools/src/convert.dart';
 
 import '../../../src/common.dart';

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

@@ -7,8 +7,8 @@
 import 'package:file/memory.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/base/logger.dart';
+import 'package:flutter_tools/src/build_info.dart';
 import 'package:flutter_tools/src/build_system/build_system.dart';
-import 'package:flutter_tools/src/build_system/targets/common.dart';
 import 'package:flutter_tools/src/build_system/targets/dart_plugin_registrant.dart';
 import 'package:flutter_tools/src/project.dart';
 

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

@@ -10,7 +10,6 @@ import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/build_info.dart';
 import 'package:flutter_tools/src/build_system/build_system.dart';
 import 'package:flutter_tools/src/build_system/targets/android.dart';
-import 'package:flutter_tools/src/build_system/targets/common.dart';
 import 'package:flutter_tools/src/build_system/targets/deferred_components.dart';
 
 import '../../../src/common.dart';

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

@@ -13,8 +13,8 @@ import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/base/platform.dart';
 import 'package:flutter_tools/src/base/terminal.dart';
+import 'package:flutter_tools/src/build_info.dart';
 import 'package:flutter_tools/src/build_system/build_system.dart';
-import 'package:flutter_tools/src/build_system/targets/common.dart';
 import 'package:flutter_tools/src/build_system/targets/icon_tree_shaker.dart';
 import 'package:flutter_tools/src/devfs.dart';
 import 'package:meta/meta.dart';

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

@@ -12,8 +12,6 @@ import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/base/platform.dart';
 import 'package:flutter_tools/src/build_info.dart';
 import 'package:flutter_tools/src/build_system/build_system.dart';
-import 'package:flutter_tools/src/build_system/targets/assets.dart';
-import 'package:flutter_tools/src/build_system/targets/common.dart';
 import 'package:flutter_tools/src/build_system/targets/ios.dart';
 import 'package:flutter_tools/src/convert.dart';
 

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

@@ -11,7 +11,6 @@ import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/build_info.dart';
 import 'package:flutter_tools/src/build_system/build_system.dart';
-import 'package:flutter_tools/src/build_system/targets/assets.dart';
 import 'package:flutter_tools/src/build_system/targets/common.dart';
 import 'package:flutter_tools/src/build_system/targets/linux.dart';
 import 'package:flutter_tools/src/convert.dart';

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

@@ -11,8 +11,6 @@ import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/base/logger.dart';
 import 'package:flutter_tools/src/build_info.dart';
 import 'package:flutter_tools/src/build_system/build_system.dart';
-import 'package:flutter_tools/src/build_system/targets/assets.dart';
-import 'package:flutter_tools/src/build_system/targets/common.dart';
 import 'package:flutter_tools/src/build_system/targets/macos.dart';
 import 'package:flutter_tools/src/convert.dart';
 

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

@@ -11,7 +11,6 @@ import 'package:flutter_tools/src/base/platform.dart';
 import 'package:flutter_tools/src/build_info.dart';
 import 'package:flutter_tools/src/build_system/build_system.dart';
 import 'package:flutter_tools/src/build_system/depfile.dart';
-import 'package:flutter_tools/src/build_system/targets/common.dart';
 import 'package:flutter_tools/src/build_system/targets/web.dart';
 import 'package:flutter_tools/src/globals_null_migrated.dart' as globals;
 

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

@@ -13,7 +13,6 @@ import 'package:flutter_tools/src/base/platform.dart';
 import 'package:flutter_tools/src/build_info.dart';
 import 'package:flutter_tools/src/build_system/build_system.dart';
 import 'package:flutter_tools/src/build_system/depfile.dart';
-import 'package:flutter_tools/src/build_system/targets/assets.dart';
 import 'package:flutter_tools/src/build_system/targets/common.dart';
 import 'package:flutter_tools/src/build_system/targets/windows.dart';
 import 'package:flutter_tools/src/convert.dart';

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

@@ -8,8 +8,6 @@ import 'package:file/memory.dart';
 import 'package:flutter_tools/src/base/file_system.dart';
 import 'package:flutter_tools/src/build_info.dart';
 import 'package:flutter_tools/src/build_system/build_system.dart';
-import 'package:flutter_tools/src/build_system/targets/common.dart';
-import 'package:flutter_tools/src/build_system/targets/icon_tree_shaker.dart';
 import 'package:flutter_tools/src/bundle.dart';
 import 'package:flutter_tools/src/globals_null_migrated.dart' as globals;
 import 'package:flutter_tools/src/project.dart';