blob: e52a92a5a56b51e07376d8bbb0fa28d0c8339f9a [file] [log] [blame]
// 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 =
LanguageVersionValidator(Entrypoint entrypoint) : super(entrypoint) {
var packagePath = p.normalize(p.absolute(entrypoint.root.dir));
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.
final unitLanguageVersionToken = unit.languageVersionToken;
if (unitLanguageVersionToken != null) {
final unitLanguageVersion =
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 '