analyzer: Extract some public API from WorkspacePackage

Fixes https://github.com/dart-lang/sdk/issues/60725

Change-Id: I63e79075d6538810ddc518e96b5bb7430e55496b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/428564
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Commit-Queue: Samuel Rawlins <srawlins@google.com>

pkg/analysis_server/lib/src/context_manager.dart

@@ -386,7 +386,7 @@ class ContextManagerImpl implements ContextManager {
   /// options file at the given [path].
   void _analyzeAnalysisOptionsYaml(
     AnalysisDriver driver,
-    WorkspacePackage? package,
+    WorkspacePackageImpl? package,
     String path,
   ) {
     var convertedErrors = const <protocol.AnalysisError>[];

pkg/analysis_server/lib/src/status/diagnostics.dart

@@ -1095,7 +1095,7 @@ class ContextsPage extends DiagnosticPageWithNav {
     buf.writeln(writeOption('Workspace root', escape(workspace?.root)));
     var workspaceFolder = folder.provider.getFolder(workspace!.root);
 
-    void writePackage(WorkspacePackage package) {
+    void writePackage(WorkspacePackageImpl package) {
       buf.writeln(writeOption('Package root', escape(package.root.path)));
       if (package is PubPackage) {
         buf.writeln(

pkg/analyzer/api.txt

@@ -4860,6 +4860,13 @@ package:analyzer/utilities/package_config_file_builder.dart:
     add (method: void Function({String? languageVersion, required String name, String packageUri, required String rootPath}))
     copy (method: PackageConfigFileBuilder Function())
     toContent (method: String Function({required String Function(String) toUriStr}))
+package:analyzer/workspace/workspace.dart:
+  WorkspacePackage (class extends Object):
+    new (constructor: WorkspacePackage Function())
+    canHavePublicApi (getter: bool)
+    root (getter: Folder)
+    contains (method: bool Function(Source))
+    isInTestDirectory (method: bool Function(File))
 dart:async:
   Future (referenced)
   Stream (referenced)

pkg/analyzer/lib/src/dart/analysis/file_state.dart

@@ -485,10 +485,10 @@ class FileState {
   /// The [FileSource] of the file with the [uri].
   final FileSource source;
 
-  /// The [WorkspacePackage] that contains this file.
+  /// The [WorkspacePackageImpl] that contains this file.
   ///
   /// It might be `null` if the file is outside of the workspace.
-  final WorkspacePackage? workspacePackage;
+  final WorkspacePackageImpl? workspacePackage;
 
   /// The [FeatureSet] for this file.
   ///
@@ -1553,7 +1553,7 @@ class FileSystemState {
   FeatureSet _getFeatureSet(
     String path,
     Uri uri,
-    WorkspacePackage? workspacePackage,
+    WorkspacePackageImpl? workspacePackage,
     AnalysisOptionsImpl analysisOptions,
   ) {
     var workspacePackageExperiments = workspacePackage?.enabledExperiments;
@@ -1574,7 +1574,7 @@ class FileSystemState {
   Version _getLanguageVersion(
     String path,
     Uri uri,
-    WorkspacePackage? workspacePackage,
+    WorkspacePackageImpl? workspacePackage,
     AnalysisOptionsImpl analysisOptions,
   ) {
     var workspaceLanguageVersion = workspacePackage?.languageVersion;
@@ -1596,7 +1596,7 @@ class FileSystemState {
     OperationPerformanceImpl? performance,
   }) {
     FileSource uriSource = FileSource(resource, uri);
-    WorkspacePackage? workspacePackage = _workspace?.findPackageFor(path);
+    WorkspacePackageImpl? workspacePackage = _workspace?.findPackageFor(path);
     AnalysisOptionsImpl analysisOptions = _getAnalysisOptions(resource);
     FeatureSet featureSet = _getFeatureSet(
       path,

pkg/analyzer/lib/src/dart/analysis/library_analyzer.dart

@@ -384,7 +384,7 @@ class LibraryAnalyzer {
     var definingUnit = _libraryElement.definingCompilationUnit;
     var analysesToContextUnits = <FileAnalysis, LintRuleUnitContext>{};
     LintRuleUnitContext? definingContextUnit;
-    WorkspacePackage? workspacePackage;
+    WorkspacePackageImpl? workspacePackage;
     for (var fileAnalysis in _libraryFiles.values) {
       var linterContextUnit = LintRuleUnitContext(
         file: fileAnalysis.file.resource,

pkg/analyzer/lib/src/error/annotation_verifier.dart

@@ -21,8 +21,8 @@ class AnnotationVerifier {
   /// The current library.
   final LibraryElement _currentLibrary;
 
-  /// The [WorkspacePackage] in which [_currentLibrary] is declared.
-  final WorkspacePackage? _workspacePackage;
+  /// The [WorkspacePackageImpl] in which [_currentLibrary] is declared.
+  final WorkspacePackageImpl? _workspacePackage;
 
   /// Whether [_currentLibrary] is part of its containing package's public API.
   late final bool _inPackagePublicApi =

pkg/analyzer/lib/src/error/best_practices_verifier.dart

@@ -80,8 +80,8 @@ class BestPracticesVerifier extends RecursiveAstVisitor<void> {
 
   final WidgetPreviewVerifier _widgetPreviewVerifier;
 
-  /// The [WorkspacePackage] in which [_currentLibrary] is declared.
-  final WorkspacePackage? _workspacePackage;
+  /// The [WorkspacePackageImpl] in which [_currentLibrary] is declared.
+  final WorkspacePackageImpl? _workspacePackage;
 
   /// True if inference failures should be reported, otherwise false.
   final bool _strictInference;
@@ -98,7 +98,7 @@ class BestPracticesVerifier extends RecursiveAstVisitor<void> {
     CompilationUnit unit, {
     required TypeSystemImpl typeSystem,
     required AnalysisOptions analysisOptions,
-    required WorkspacePackage? workspacePackage,
+    required WorkspacePackageImpl? workspacePackage,
   }) : _nullType = typeProvider.nullType,
        _typeSystem = typeSystem,
        _strictInference = analysisOptions.strictInference,
@@ -1618,7 +1618,7 @@ class _InvalidAccessVerifier {
 
   final ErrorReporter _errorReporter;
   final LibraryElement _library;
-  final WorkspacePackage? _workspacePackage;
+  final WorkspacePackageImpl? _workspacePackage;
 
   final bool _inTemplateSource;
   final bool _inTestDirectory;

pkg/analyzer/lib/src/error/deprecated_member_use_verifier.dart

@@ -354,7 +354,7 @@ abstract class BaseDeprecatedMemberUseVerifier {
 }
 
 class DeprecatedMemberUseVerifier extends BaseDeprecatedMemberUseVerifier {
-  final WorkspacePackage? _workspacePackage;
+  final WorkspacePackageImpl? _workspacePackage;
   final ErrorReporter _errorReporter;
 
   DeprecatedMemberUseVerifier(

pkg/analyzer/lib/src/lint/linter.dart

@@ -16,7 +16,7 @@ import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/lint/linter_visitor.dart' show NodeLintRegistry;
 import 'package:analyzer/src/lint/pub.dart';
 import 'package:analyzer/src/lint/state.dart';
-import 'package:analyzer/src/workspace/workspace.dart';
+import 'package:analyzer/workspace/workspace.dart';
 import 'package:meta/meta.dart';
 
 export 'package:analyzer/src/lint/linter_visitor.dart' show NodeLintRegistry;

pkg/analyzer/lib/src/workspace/basic.dart

@@ -23,7 +23,7 @@ class BasicWorkspace extends SimpleWorkspace {
   }
 
   @override
-  WorkspacePackage? findPackageFor(String filePath) {
+  WorkspacePackageImpl? findPackageFor(String filePath) {
     Folder folder = provider.getFolder(filePath);
     if (provider.pathContext.isWithin(root, folder.path)) {
       return theOnlyPackage;
@@ -55,7 +55,7 @@ class BasicWorkspace extends SimpleWorkspace {
 /// Separate from [Packages] or package maps, this class is designed to simply
 /// understand whether arbitrary file paths represent libraries declared within
 /// a given package in a [BasicWorkspace].
-class BasicWorkspacePackage extends WorkspacePackage {
+class BasicWorkspacePackage extends WorkspacePackageImpl {
   @override
   final Folder root;
 

pkg/analyzer/lib/src/workspace/blaze.dart

@@ -586,7 +586,7 @@ class BlazeWorkspace extends Workspace
 /// Separate from [Packages] or package maps, this class is designed to simply
 /// understand whether arbitrary file paths represent libraries declared within
 /// a given package in a [BlazeWorkspace].
-class BlazeWorkspacePackage extends WorkspacePackage {
+class BlazeWorkspacePackage extends WorkspacePackageImpl {
   /// A prefix for any URI of a path in this package.
   final String _uriPrefix;
 

pkg/analyzer/lib/src/workspace/gn.dart

@@ -81,7 +81,7 @@ class GnWorkspace extends Workspace {
   }
 
   @override
-  WorkspacePackage? findPackageFor(String filePath) {
+  WorkspacePackageImpl? findPackageFor(String filePath) {
     var startFolder = provider.getFolder(filePath);
     for (var folder in startFolder.withAncestors) {
       if (folder.path.length < root.length) {
@@ -210,7 +210,7 @@ class GnWorkspace extends Workspace {
 /// Separate from [Packages] or package maps, this class is designed to simply
 /// understand whether arbitrary file paths represent libraries declared within
 /// a given package in a GnWorkspace.
-class GnWorkspacePackage extends WorkspacePackage {
+class GnWorkspacePackage extends WorkspacePackageImpl {
   @override
   final Folder root;
 

pkg/analyzer/lib/src/workspace/pub.dart

@@ -180,7 +180,7 @@ class PackageConfigWorkspace extends SimpleWorkspace {
   /// The contents of the package config file.
   late final String? _packageConfigContent;
 
-  final Map<String, WorkspacePackage> _workspacePackages = {};
+  final Map<String, WorkspacePackageImpl> _workspacePackages = {};
 
   factory PackageConfigWorkspace(
     ResourceProvider provider, //Packages packages,
@@ -211,7 +211,7 @@ class PackageConfigWorkspace extends SimpleWorkspace {
     _packageConfigContent = packageConfigFile.readAsStringSync();
   }
 
-  Iterable<WorkspacePackage> get allPackages =>
+  Iterable<WorkspacePackageImpl> get allPackages =>
       _workspacePackages.values.toSet();
 
   @override
@@ -305,7 +305,7 @@ class PackageConfigWorkspace extends SimpleWorkspace {
   /// can be for a source file or a generated file. Generated files are located
   /// in the '.dart_tool/build/generated' folder of the containing package.
   @override
-  WorkspacePackage? findPackageFor(String filePath) {
+  WorkspacePackageImpl? findPackageFor(String filePath) {
     var pathContext = provider.pathContext;
     // Must be in this workspace.
     if (!pathContext.isWithin(root, filePath)) {
@@ -402,7 +402,7 @@ class PackageConfigWorkspace extends SimpleWorkspace {
 /// Separate from [Packages] or package maps, this class is designed to simply
 /// understand whether arbitrary file paths represent libraries declared within
 /// a given package in a [PackageConfigWorkspace].
-class PubPackage extends WorkspacePackage {
+class PubPackage extends WorkspacePackageImpl {
   static const List<String> _generatedPathParts = [
     file_paths.dotDartTool,
     file_paths.packageBuild,

pkg/analyzer/lib/src/workspace/workspace.dart

@@ -2,6 +2,7 @@
 // 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 'package:_fe_analyzer_shared/src/base/analyzer_public_api.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/source/source.dart';
 import 'package:analyzer/src/context/packages.dart';
@@ -11,6 +12,7 @@ import 'package:analyzer/src/generated/source.dart'
 import 'package:analyzer/src/summary/api_signature.dart';
 import 'package:analyzer/src/summary/package_bundle_reader.dart';
 import 'package:analyzer/src/workspace/blaze.dart';
+import 'package:analyzer/workspace/workspace.dart';
 import 'package:meta/meta.dart';
 import 'package:pub_semver/pub_semver.dart';
 
@@ -51,7 +53,7 @@ abstract class Workspace {
   /// Separate from [Packages] or package maps, this method is designed to find
   /// the package, by its root, in which a library at an arbitrary path is
   /// defined.
-  WorkspacePackage? findPackageFor(String filePath);
+  WorkspacePackageImpl? findPackageFor(String filePath);
 }
 
 /// Abstract superclass of classes that provide information about a package
@@ -60,9 +62,8 @@ abstract class Workspace {
 /// Separate from [Packages] or package maps, this class is designed to simply
 /// understand whether arbitrary file paths represent libraries declared within
 /// a given package in a Workspace.
-abstract class WorkspacePackage {
-  /// Whether this package can have public APIs, that is, the package has marker
-  /// files like 'pubspec.yaml' or 'BUILD'.
+abstract class WorkspacePackageImpl implements WorkspacePackage {
+  @override
   bool get canHavePublicApi => true;
 
   /// Return the experiments enabled for all files in the package.
@@ -79,9 +80,6 @@ abstract class WorkspacePackage {
   /// Return `null` if this package does not have a language version override.
   Version? get languageVersion => null;
 
-  /// The root [Folder] of this package.
-  Folder get root;
-
   Workspace get workspace;
 
   /// Whether this compilation unit [source] is not within the `lib` or `bin`
@@ -94,8 +92,6 @@ abstract class WorkspacePackage {
     return !(libDir.contains(cuPath) || binDir.contains(cuPath));
   }
 
-  bool contains(Source source);
-
   /// Return a file path for the location of [source].
   ///
   /// If [source]'s URI scheme is package, it's fullName might be unusable (for
@@ -109,7 +105,7 @@ abstract class WorkspacePackage {
     }
   }
 
-  /// Whether [file] is in a "test" directory of this package.
+  @override
   bool isInTestDirectory(File file) {
     return false;
   }
@@ -126,6 +122,7 @@ abstract class WorkspacePackage {
 /// An interface for a workspace that contains a default analysis options file.
 /// Classes that provide information of such a workspace should implement this
 /// interface.
+@AnalyzerPublicApi(message: 'public exported')
 class WorkspaceWithDefaultAnalysisOptions {
   /// The URI for the default analysis options file.
   static const String uri = 'package:dart.analysis_options/default.yaml';

pkg/analyzer/lib/workspace/workspace.dart

@@ -0,0 +1,21 @@
+// Copyright (c) 2025, the Dart project authors. Please see the AUTHORS file
+// 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 'package:analyzer/file_system/file_system.dart';
+import 'package:analyzer/source/source.dart';
+
+abstract class WorkspacePackage {
+  /// Whether this package can have public APIs, that is, the package has marker
+  /// files like 'pubspec.yaml' or 'BUILD'.
+  bool get canHavePublicApi;
+
+  /// The path to the root of this package.
+  Folder get root;
+
+  /// Whether this package contains [source].
+  bool contains(Source source);
+
+  /// Whether [file] is in a "test" directory of this package.
+  bool isInTestDirectory(File file);
+}

pkg/analyzer/test/src/dart/analysis/analysis_context_collection_test.dart

@@ -1136,7 +1136,7 @@ class _AnalysisContextCollectionPrinter {
 
   final Map<AnalysisOptionsImpl, String> _analysisOptions = Map.identity();
   final Map<Workspace, (int, String)> _workspaces = Map.identity();
-  final Map<Workspace, Map<WorkspacePackage, String>> _workspacePackages =
+  final Map<Workspace, Map<WorkspacePackageImpl, String>> _workspacePackages =
       Map.identity();
 
   _AnalysisContextCollectionPrinter({
@@ -1170,7 +1170,7 @@ class _AnalysisContextCollectionPrinter {
     return _indexIdOfWorkspace(workspace).$2;
   }
 
-  String _idOfWorkspacePackage(WorkspacePackage package) {
+  String _idOfWorkspacePackage(WorkspacePackageImpl package) {
     var workspace = package.workspace;
     var packages = _workspacePackages[workspace] ??= Map.identity();
     if (packages[package] case var id?) {
@@ -1327,7 +1327,7 @@ class _AnalysisContextCollectionPrinter {
     }
   }
 
-  void _writeWorkspacePackage(WorkspacePackage package) {
+  void _writeWorkspacePackage(WorkspacePackageImpl package) {
     var id = _idOfWorkspacePackage(package);
     switch (package) {
       case BasicWorkspacePackage():

pkg/analyzer/test/src/workspace/blaze_test.dart

@@ -701,7 +701,7 @@ class BlazeWorkspacePackageTest with ResourceProviderMixin {
         BlazeWorkspace.find(resourceProvider, convertPath('/ws/some/code'))!;
     var targetFile = newFile('/ws/some/code/lib/code.dart', '');
 
-    WorkspacePackage? package = workspace.findPackageFor(targetFile.path);
+    WorkspacePackageImpl? package = workspace.findPackageFor(targetFile.path);
     expect(package, isNull);
   }
 
@@ -717,7 +717,7 @@ class BlazeWorkspacePackageTest with ResourceProviderMixin {
           lookForBuildFileSubstitutes: false,
         )!;
 
-    WorkspacePackage? package = workspace.findPackageFor(
+    WorkspacePackageImpl? package = workspace.findPackageFor(
       convertPath('/ws/some/code/lib/code.dart'),
     );
     expect(package, isNull);

pkg/analyzer/test/src/workspace/pub_test.dart

@@ -582,7 +582,7 @@ class PackageConfigWorkspaceTest with ResourceProviderMixin {
 @reflectiveTest
 class PubPackageTest extends WorkspacePackageTest {
   late final PackageConfigWorkspace myWorkspace;
-  late final WorkspacePackage myPackage;
+  late final WorkspacePackageImpl myPackage;
 
   String get fooPackageLibPath => '$fooPackageRootPath/lib';
 

pkg/analyzer/test/src/workspace/workspace_test_support.dart

@@ -3,6 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 import 'package:analyzer/src/workspace/workspace.dart';
+import 'package:analyzer/workspace/workspace.dart';
 import 'package:analyzer_testing/resource_provider_mixin.dart';
 
 /// Utilities for tests of subclasses of [WorkspacePackage].
@@ -12,6 +13,6 @@ abstract class WorkspacePackageTest with ResourceProviderMixin {
 
   /// Return the package containing the given [path], or `null` if there is no
   /// such package in the [workspace].
-  WorkspacePackage? findPackage(String path) =>
+  WorkspacePackageImpl? findPackage(String path) =>
       workspace.findPackageFor(convertPath(path));
 }

pkg/linter/lib/src/ast.dart

@@ -13,8 +13,7 @@ import 'package:analyzer/dart/element/visitor2.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/lint/constants.dart' // ignore: implementation_imports
     show ExpressionExtension;
-import 'package:analyzer/src/workspace/workspace.dart' // ignore: implementation_imports
-    show WorkspacePackage;
+import 'package:analyzer/workspace/workspace.dart';
 import 'package:path/path.dart' as path;
 
 import 'analyzer.dart';

pkg/linter/lib/src/rules/deprecated_member_use_from_same_package.dart

@@ -12,8 +12,7 @@ import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/error/error.dart';
 import 'package:analyzer/src/error/deprecated_member_use_verifier.dart' // ignore: implementation_imports
     show BaseDeprecatedMemberUseVerifier;
-import 'package:analyzer/src/workspace/workspace.dart' // ignore: implementation_imports
-    show WorkspacePackage;
+import 'package:analyzer/workspace/workspace.dart';
 
 import '../analyzer.dart';