mirror of
https://github.com/dart-lang/sdk
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Add an initial version of a script to validate the code samples in the dart: doc comments.
Change-Id: If74a11ffee8130963c37c9bd8ad74da4211f61d7 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/214307 Commit-Queue: Devon Carew <devoncarew@google.com> Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
This commit is contained in:
parent
667e879ded
commit
1d43ec2a99
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@ -36,7 +36,7 @@ part of dart.io;
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///
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///
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/// void main() async {
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/// void main() async {
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/// // Creates dir/ and dir/subdir/.
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/// // Creates dir/ and dir/subdir/.
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/// var directory = await Directory('dir/subdir').create(recursive: true)
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/// var directory = await Directory('dir/subdir').create(recursive: true);
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/// print(directory.path);
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/// print(directory.path);
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/// }
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/// }
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/// ```
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/// ```
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@ -45,7 +45,7 @@ part of dart.io;
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/// [operatingSystem] getter. You can also use one of the static boolean
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/// [operatingSystem] getter. You can also use one of the static boolean
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/// getters: [isMacOS], [isLinux], and [isWindows].
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/// getters: [isMacOS], [isLinux], and [isWindows].
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/// ```dart
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/// ```dart
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/// import 'dart:io' show Platform, stdout;
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/// import 'dart:io' show Platform;
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///
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///
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/// void main() {
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/// void main() {
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/// // Get the operating system as a string.
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/// // Get the operating system as a string.
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24
tools/verify_docs/README.md
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24
tools/verify_docs/README.md
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@ -0,0 +1,24 @@
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## Whats' this?
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A tool to validate the documentation comments for the `dart:` libraries.
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## Running the tool
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To validate all the dart: libraries, run:
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```
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dart tools/verify_docs/bin/verify_docs.dart
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```
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Or to validate an individual library (async, collection, js_util, ...), run:
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```
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dart tools/verify_docs/bin/verify_docs.dart sdk/lib/<lib-name>
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```
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The tool should be run from the root of the sdk repository.
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## Authoring code samples
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TODO(devoncarew): Document the conventions for code samples in the dart: libraries
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and the tools available to configure them.
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308
tools/verify_docs/bin/verify_docs.dart
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308
tools/verify_docs/bin/verify_docs.dart
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@ -0,0 +1,308 @@
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// Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import 'dart:io';
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import 'package:analyzer/dart/analysis/features.dart';
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import 'package:analyzer/dart/analysis/results.dart';
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import 'package:analyzer/dart/analysis/utilities.dart';
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import 'package:analyzer/dart/ast/ast.dart';
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import 'package:analyzer/dart/ast/visitor.dart';
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import 'package:analyzer/diagnostic/diagnostic.dart';
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import 'package:analyzer/error/error.dart';
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import 'package:analyzer/file_system/overlay_file_system.dart';
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import 'package:analyzer/file_system/physical_file_system.dart';
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import 'package:analyzer/source/line_info.dart';
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import 'package:analyzer/src/dart/error/hint_codes.dart';
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import 'package:analyzer/src/util/comment.dart';
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import 'package:path/path.dart' as path;
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void main(List<String> args) async {
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final libDir = Directory('sdk/lib');
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if (!libDir.existsSync()) {
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print('Please run this tool from the root of the sdk repo.');
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exit(1);
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}
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print('Validating the dartdoc code samples from the dart: libraries.');
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print('');
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print('To run this tool, run `dart tools/verify_docs/bin/verify_docs.dart`.');
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print('For documentation about how to author dart: code samples,'
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' see tools/verify_docs/README.md');
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final coreLibraries = args.isEmpty
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? libDir.listSync().whereType<Directory>().toList()
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: args.map((arg) => Directory(arg)).toList();
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coreLibraries.sort((a, b) => a.path.compareTo(b.path));
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// Skip some dart: libraries.
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const skipLibraries = {
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'html',
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'indexed_db',
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'svg',
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'vmservice',
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'web_audio',
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'web_gl',
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'web_sql'
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};
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coreLibraries.removeWhere(
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(lib) => skipLibraries.contains(path.basename(lib.path)),
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);
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var hadErrors = false;
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for (final dir in coreLibraries) {
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hadErrors |= await validateLibrary(dir);
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}
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exitCode = hadErrors ? 1 : 0;
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}
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Future<bool> validateLibrary(Directory dir) async {
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final libName = path.basename(dir.path);
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print('## dart:$libName');
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print('');
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var hadErrors = false;
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for (final file in dir
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.listSync(recursive: true)
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.whereType<File>()
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.where((file) => file.path.endsWith('.dart'))) {
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hadErrors |= await verifyFile(libName, file, dir);
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}
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return hadErrors;
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}
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Future<bool> verifyFile(String coreLibName, File file, Directory parent) async {
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final text = file.readAsStringSync();
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var parseResult = parseString(
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content: text,
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featureSet: FeatureSet.latestLanguageVersion(),
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path: file.path,
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throwIfDiagnostics: false,
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);
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// Throw if there are syntactic errors.
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var syntacticErrors = parseResult.errors.where((error) {
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return error.errorCode.type == ErrorType.SYNTACTIC_ERROR;
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}).toList();
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if (syntacticErrors.isNotEmpty) {
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// todo: have a better failure mode
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throw Exception(syntacticErrors);
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}
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var visitor = ValidateCommentCodeSamplesVisitor(
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coreLibName,
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file.path,
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parseResult.lineInfo,
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);
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await visitor.process(parseResult);
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if (visitor.errors.isNotEmpty) {
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print('${path.relative(file.path, from: parent.parent.path)}');
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print('${visitor.errors.toString()}');
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}
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return visitor.errors.isEmpty;
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}
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/// todo: doc
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class ValidateCommentCodeSamplesVisitor extends GeneralizingAstVisitor {
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final String coreLibName;
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final String filePath;
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final LineInfo lineInfo;
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ValidateCommentCodeSamplesVisitor(
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this.coreLibName,
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this.filePath,
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this.lineInfo,
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);
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final List<CodeSample> samples = [];
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final StringBuffer errors = StringBuffer();
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Future process(ParseStringResult parseResult) async {
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// collect code samples
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visitCompilationUnit(parseResult.unit);
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// analyze them
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for (CodeSample sample in samples) {
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await validateCodeSample(sample);
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}
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}
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@override
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void visitAnnotatedNode(AnnotatedNode node) {
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// todo: ignore (or fail?) doc comments on non-public symbols
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_handleDocumentableNode(node);
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super.visitAnnotatedNode(node);
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}
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void _handleDocumentableNode(AnnotatedNode node) {
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final docComment = node.documentationComment;
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if (docComment == null || !docComment.isDocumentation) {
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return;
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}
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const sampleStart = '```dart';
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const sampleEnd = '```';
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final text = getCommentNodeRawText(docComment)!;
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final commentOffset = docComment.offset;
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final commentLineStart = lineInfo.getLocation(commentOffset).lineNumber;
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if (!text.contains(sampleStart)) {
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return;
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}
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var offset = text.indexOf(sampleStart);
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while (offset != -1) {
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offset = text.indexOf('\n', offset) + 1;
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final end = text.indexOf(sampleEnd, offset);
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var snippet = text.substring(offset, end);
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snippet = snippet.substring(0, snippet.lastIndexOf('\n'));
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List<String> lines = snippet.split('\n');
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// TODO(devoncarew): Also look for template directives.
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samples.add(
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CodeSample(
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coreLibName,
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lines.map((e) => ' ${cleanDocLine(e)}').join('\n'),
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commentLineStart +
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text.substring(0, offset - 1).split('\n').length -
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1,
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),
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);
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offset = text.indexOf(sampleStart, offset);
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}
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}
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Future validateCodeSample(CodeSample sample) async {
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// TODO(devoncarew): Support <!-- template: none --> ?
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// TODO(devoncarew): Support <!-- template: main --> ?
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final resourceProvider =
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OverlayResourceProvider(PhysicalResourceProvider.INSTANCE);
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var text = sample.text;
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final lines = sample.text.split('\n').map((l) => l.trim()).toList();
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final hasImports = text.contains("import '") || text.contains('import "');
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var useDefaultTemplate = true;
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if (lines.any((line) =>
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line.startsWith('class ') ||
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line.startsWith('enum ') ||
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line.startsWith('extension '))) {
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useDefaultTemplate = false;
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}
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if (lines
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.any((line) => line.startsWith('main(') || line.contains(' main('))) {
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useDefaultTemplate = false;
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}
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if (!hasImports) {
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if (useDefaultTemplate) {
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text = "main() async {\n${text.trimRight()}\n}\n";
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}
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if (sample.coreLibName != 'internal') {
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text = "import 'dart:${sample.coreLibName}';\n$text";
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}
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}
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// Note: the file paths used below will currently only work on posix
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// filesystems.
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final sampleFilePath = '/sample.dart';
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resourceProvider.setOverlay(
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sampleFilePath,
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content: text,
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modificationStamp: 0,
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);
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// TODO(devoncarew): refactor to use AnalysisContextCollection to avoid
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// re-creating analysis contexts.
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final result = await resolveFile2(
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path: sampleFilePath,
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resourceProvider: resourceProvider,
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);
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resourceProvider.removeOverlay(sampleFilePath);
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if (result is ResolvedUnitResult) {
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// Filter out unused imports, since we speculatively add imports to some
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// samples.
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var errors =
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result.errors.where((e) => e.errorCode != HintCode.UNUSED_IMPORT);
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// Also, don't worry about 'unused_local_variable' and related; this may
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// be intentional in samples.
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errors = errors.where(
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(e) =>
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e.errorCode != HintCode.UNUSED_LOCAL_VARIABLE &&
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e.errorCode != HintCode.UNUSED_ELEMENT,
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);
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if (errors.isNotEmpty) {
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print('$filePath:${sample.lineStart}: ${errors.length} errors');
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for (final error in errors) {
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final location = result.lineInfo.getLocation(error.offset);
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print(
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' ${_severity(error.severity)}: ${error.message} '
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'[$location] (${error.errorCode.name.toLowerCase()})',
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);
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}
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print('');
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// Print out the code sample.
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print(sample.text
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.split('\n')
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.map((line) =>
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' >${line.length >= 5 ? line.substring(5) : line.trimLeft()}')
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.join('\n'));
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print('');
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}
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} else {
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throw 'unexpected result type: ${result}';
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}
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return;
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}
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}
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String cleanDocLine(String line) {
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var copy = line.trimLeft();
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if (copy.startsWith('///')) {
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copy = copy.substring(3);
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} else if (copy.startsWith('*')) {
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copy = copy.substring(1);
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}
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return copy.padLeft(line.length, ' ');
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}
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class CodeSample {
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final String coreLibName;
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final String text;
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final int lineStart;
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CodeSample(this.coreLibName, this.text, this.lineStart);
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}
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String _severity(Severity severity) {
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switch (severity) {
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case Severity.info:
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return 'info';
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case Severity.warning:
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return 'warning';
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case Severity.error:
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return 'error';
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}
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}
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12
tools/verify_docs/pubspec.yaml
Normal file
12
tools/verify_docs/pubspec.yaml
Normal file
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@ -0,0 +1,12 @@
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name: verify_docs
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description: A tool to validate the documentation comments for the `dart:` libraries.
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# This package is not intended for consumption on pub.dev. DO NOT publish.
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publish_to: none
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environment:
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sdk: '>=2.12.0 <3.0.0'
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dependencies:
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analyzer: any
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path: any
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