Create copying sdk configuration provider

test_common/lib/sdk_asset_generator.dart

@@ -13,7 +13,7 @@ import 'package:test_common/test_sdk_layout.dart';
 /// - sound null safety: js, source map, full dill.
 /// - weak null safety: js, source map, full dill, summary.
 class SdkAssetGenerator {
-  static bool _sdkAssetsGenerated = false;
+  bool _sdkAssetsGenerated = false;
   final _logger = Logger('SdkAssetGenerator');
 
   final FileSystem fileSystem;
@@ -88,18 +88,15 @@ class SdkAssetGenerator {
         'org-dartlang-sdk:///lib/libraries.json',
         '--modules',
         'amd',
-        if (soundNullSafety)
-          '--sound-null-safety'
-        else
-          '--no-sound-null-safety',
+        soundNullSafety ? '--sound-null-safety' : '--no-sound-null-safety',
         'dart:core',
         '-o',
         jsPath,
       ];
 
       final output = <String>[];
       _logger.fine('Executing dart ${args.join(' ')}');
-      final process = await Process.start(Platform.resolvedExecutable, args,
+      final process = await Process.start(sdkLayout.dartPath, args,
           workingDirectory: sdkLayout.sdkDirectory);
 
       process.stdout
@@ -187,7 +184,7 @@ class SdkAssetGenerator {
       ];
 
       _logger.fine('Executing dart ${args.join(' ')}');
-      final process = await Process.start(Platform.resolvedExecutable, args,
+      final process = await Process.start(sdkLayout.dartPath, args,
           workingDirectory: sdkLayout.sdkDirectory);
 
       final output = <String>[];

test_common/lib/test_sdk_configuration.dart

@@ -2,12 +2,85 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-// TODO:(annagrin) Move to a test_common package.
+import 'dart:io';
+
 import 'package:dwds/sdk_configuration.dart';
+import 'package:logging/logging.dart';
 
 import 'package:test_common/sdk_asset_generator.dart';
 import 'package:test_common/test_sdk_layout.dart';
 
+/// Implementation for SDK configuration for tests that can generate
+/// missing assets.
+///
+///  - Generate SDK js, source map, and full dill for weak and sound
+///    modes (normally included in flutter SDK or produced by build).
+///  - Need to generate SDK summary for weak null safety mode as it
+///    is not provided by the SDK installation.
+///
+/// TODO(annagrin): update to only generating missing sound artifacts
+/// for frontend server after we have no uses of weak null safety.
+class TestSdkCopyConfigurationProvider extends SdkConfigurationProvider {
+  final _logger = Logger('TestSdkConfigurationProvider');
+
+  final bool _verbose;
+  late final Directory _sdkDirectory;
+  SdkConfiguration? _configuration;
+
+  late final TestSdkLayout sdkLayout;
+
+  TestSdkCopyConfigurationProvider({bool verbose = false})
+      : _verbose = verbose {
+    _sdkDirectory = Directory.systemTemp.createTempSync('sdk copy');
+    sdkLayout = TestSdkLayout.createDefault(_sdkDirectory.path);
+  }
+
+  @override
+  Future<SdkConfiguration> get configuration async =>
+      _configuration ??= await _create();
+
+  /// Generate missing assets in the default SDK layout.
+  ///
+  /// Creates a copy of the SDK directory where all the missing assets
+  /// are generated. Tests using this configuration run using the copy
+  /// sdk layout to make sure the actual SDK is not modified.
+  Future<SdkConfiguration> _create() async {
+    try {
+      await copyDirectory(
+          TestSdkLayout.defaultSdkDirectory, _sdkDirectory.path);
+    } catch (e, s) {
+      _logger.severe('Failed to create SDK directory copy', e, s);
+      dispose();
+      rethrow;
+    }
+
+    try {
+      final assetGenerator = SdkAssetGenerator(
+        sdkLayout: sdkLayout,
+        verboseCompiler: _verbose,
+      );
+
+      await assetGenerator.generateSdkAssets();
+      return TestSdkLayout.createConfiguration(sdkLayout);
+    } catch (e, s) {
+      _logger.severe('Failed generate missing assets', e, s);
+      dispose();
+      rethrow;
+    }
+  }
+
+  void dispose({bool retry = true}) {
+    try {
+      if (_sdkDirectory.existsSync()) {
+        _sdkDirectory.deleteSync(recursive: true);
+      }
+    } catch (e, s) {
+      _logger.warning('Failed delete SDK directory copy', e, s);
+      dispose(retry: false);
+    }
+  }
+}
+
 /// Implementation for SDK configuration for tests that can generate
 /// missing assets.
 ///

test_common/lib/test_sdk_layout.dart

@@ -2,6 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+import 'dart:io';
+
 import 'package:dwds/sdk_configuration.dart';
 import 'package:path/path.dart' as p;
 
@@ -83,7 +85,11 @@ class TestSdkLayout {
           'web',
           'dart_stack_trace_mapper.js',
         ),
-        dartPath: p.join(sdkLayout.sdkDirectory, 'bin', 'dart'),
+        dartPath: p.join(
+          sdkLayout.sdkDirectory,
+          'bin',
+          Platform.isWindows ? 'dart.exe' : 'dart',
+        ),
         frontendServerSnapshotPath: p.join(
           sdkLayout.sdkDirectory,
           'bin',
@@ -97,6 +103,12 @@ class TestSdkLayout {
           'snapshots',
           'kernel_worker.dart.snapshot',
         ),
+        devToolsDirectory: p.join(
+          sdkLayout.sdkDirectory,
+          'bin',
+          'resources',
+          'devtools',
+        ),
       );
 
   final String sdkDirectory;
@@ -128,6 +140,7 @@ class TestSdkLayout {
   final String frontendServerSnapshotPath;
   final String dartdevcSnapshotPath;
   final String kernelWorkerSnapshotPath;
+  final String devToolsDirectory;
 
   const TestSdkLayout({
     required this.sdkDirectory,
@@ -145,6 +158,7 @@ class TestSdkLayout {
     required this.frontendServerSnapshotPath,
     required this.dartdevcSnapshotPath,
     required this.kernelWorkerSnapshotPath,
+    required this.devToolsDirectory,
   });
 
   /// Creates configuration from sdk layout.
@@ -156,3 +170,20 @@ class TestSdkLayout {
         compilerWorkerPath: sdkLayout.dartdevcSnapshotPath,
       );
 }
+
+// Update modified files.
+Future<void> copyDirectory(String from, String to) async {
+  if (!Directory(from).existsSync()) return;
+  await Directory(to).create(recursive: true);
+
+  await for (final file in Directory(from).list(followLinks: false)) {
+    final copyTo = p.join(to, p.relative(file.path, from: from));
+    if (file is Directory) {
+      await copyDirectory(file.path, copyTo);
+    } else if (file is File) {
+      await File(file.path).copy(copyTo);
+    } else if (file is Link) {
+      await Link(copyTo).create(await file.target(), recursive: true);
+    }
+  }
+}