| // Copyright (c) 2020, 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 'dart:async'; |
| |
| import 'package:analyzer/dart/ast/ast.dart'; |
| import 'package:path/path.dart' as p; |
| import 'package:stack_trace/stack_trace.dart'; |
| |
| import '../dart.dart'; |
| import '../entrypoint.dart'; |
| import '../language_version.dart'; |
| import '../log.dart' as log; |
| import '../utils.dart'; |
| import '../validator.dart'; |
| |
| /// Validates that libraries do not opt into newer language versions than what |
| /// they declare in their pubspec. |
| class LanguageVersionValidator extends Validator { |
| final AnalysisContextManager analysisContextManager = |
| AnalysisContextManager(); |
| |
| LanguageVersionValidator(Entrypoint entrypoint) : super(entrypoint) { |
| var packagePath = p.normalize(p.absolute(entrypoint.root.dir)); |
| analysisContextManager.createContextsForDirectory(packagePath); |
| } |
| |
| @override |
| Future validate() async { |
| final declaredLanguageVersion = entrypoint.root.pubspec.languageVersion; |
| |
| for (final path in ['lib', 'bin'] |
| .map((path) => entrypoint.root.listFiles(beneath: path)) |
| .expand((files) => files) |
| .where((String file) => p.extension(file) == '.dart')) { |
| CompilationUnit unit; |
| try { |
| unit = analysisContextManager.parse(path); |
| } on AnalyzerErrorGroup catch (e, s) { |
| // Ignore files that do not parse. |
| log.fine(getErrorMessage(e)); |
| log.fine(Chain.forTrace(s).terse); |
| continue; |
| } |
| |
| final unitLanguageVersionToken = unit.languageVersionToken; |
| if (unitLanguageVersionToken != null) { |
| final unitLanguageVersion = |
| LanguageVersion.fromLanguageVersionToken(unitLanguageVersionToken); |
| if (unitLanguageVersion > declaredLanguageVersion) { |
| final relativePath = p.relative(path); |
| errors.add('$relativePath is declaring language version ' |
| '$unitLanguageVersion that is newer than the SDK ' |
| 'constraint $declaredLanguageVersion declared in ' |
| '`pubspec.yaml`.'); |
| } |
| } |
| } |
| } |
| } |