pkg/analyzer_plugin/lib/src/utilities/navigation/document_links.dart - sdk - Git at Google

 // 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/dart/analysis/results.dart';
 import 'package:analyzer/dart/ast/doc_comment.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/dart/ast/ast.dart';
 import 'package:analyzer/src/lint/registry.dart';
 import 'package:collection/collection.dart';
 import 'package:yaml/yaml.dart';

 /// Computes [DocumentLink]s for lint names in an 'analysis_options.yaml'.
 class AnalysisOptionLinkComputer {
   static const _lintsUrl = 'https://dart.dev/tools/linter-rules/';

   AnalysisOptionLinkComputer();

   List<DocumentLink> findLinks(String content) {
     YamlNode node;
     try {
       node = loadYamlNode(content);
     } catch (exception) {
       return [];
     }

     if (node is! YamlMap) return [];

     var allRules = <YamlNode>[
       if (node.nodes['linter'] case YamlMap dependencies)
         ...switch (dependencies.nodes['rules']) {
           YamlMap(:var nodes) => nodes.keys.map((node) => node as YamlNode),
           YamlList rules => rules.nodes,
           _ => const <YamlNode>[],
         }
     ];

     var links = <DocumentLink>[];
     for (var rule in allRules) {
       var packageLink = _computeLink(rule);

       if (packageLink != null) {
         var offset = rule.span.start.offset;
         var length = rule.span.length;
         links.add(DocumentLink(offset, length, packageLink));
       }
     }

     return links;
   }

   /// Computes a link for the rule named [rule].
   Uri? _computeLink(YamlNode rule) {
     if (rule is! YamlScalar) return null;
     var name = rule.value;
     if (name is! String) return null;

     var lint = Registry.ruleRegistry.rules
         .firstWhereOrNull((rule) => rule.name == name);
     if (lint == null) {
       return null;
     }

     return Uri.tryParse(_lintsUrl + name);
   }
 }

 /// A visitor to locate links to other documents in a file.
 ///
 /// Such paths include "See example/a/b.dart" in documentation comments.
 class DartDocumentLinkVisitor extends RecursiveAstVisitor<void> {
   final ParsedUnitResult unit;
   final String filePath;
   final ResourceProvider resourceProvider;
   final _documentLinks = <DocumentLink>[];

   /// The directory that contains `examples/api`, `null` if not found.
   late final Folder? folderWithExamplesApi = () {
     var file = resourceProvider.getFile(filePath);
     for (var parent in file.parent.withAncestors) {
       var apiFolder = parent
           .getChildAssumingFolder('examples')
           .getChildAssumingFolder('api');
       if (apiFolder.exists) {
         return parent;
       }
     }
     return null;
   }();

   DartDocumentLinkVisitor(this.resourceProvider, this.unit)
       : filePath = unit.path;

   List<DocumentLink> findLinks(AstNode node) {
     _documentLinks.clear();
     node.accept(this);
     return _documentLinks;
   }

   @override
   void visitComment(Comment node) {
     super.visitComment(node);

     var content = unit.content;

     var toolDirectives = node.docDirectives
         .where((directive) => directive.type == DocDirectiveType.tool)
         .whereType<BlockDocDirective>();
     for (var toolDirective in toolDirectives) {
       var contentsStart = toolDirective.openingTag.end;
       var contentsEnd = toolDirective.closingTag?.offset;

       // Skip unclosed tags.
       if (contentsEnd == null) {
         continue;
       }

       var strValue = content.substring(contentsStart, contentsEnd);
       if (strValue.isEmpty) {
         continue;
       }

       var seeCodeIn = '** See code in ';
       var startIndex = strValue.indexOf('${seeCodeIn}examples/api/');
       if (startIndex != -1) {
         final folderWithExamplesApi = this.folderWithExamplesApi;
         if (folderWithExamplesApi == null) {
           // Examples directory doesn't exist.
           return;
         }
         startIndex += seeCodeIn.length;
         var endIndex = strValue.indexOf('.dart') + 5;
         var pathSnippet = strValue.substring(startIndex, endIndex);
         // Split on '/' because that's what the comment syntax uses, but
         // re-join it using the resource provider to get the right separator
         // for the platform.
         var examplePath = resourceProvider.pathContext.joinAll([
           folderWithExamplesApi.path,
           ...pathSnippet.split('/'),
         ]);
         var offset = contentsStart + startIndex;
         var length = endIndex - startIndex;
         _documentLinks.add(DocumentLink(offset, length, Uri.file(examplePath)));
       }
     }
   }
 }

 /// A link to another document or URI found in a source file.
 class DocumentLink {
   final Uri targetUri;
   final int offset;
   final int length;

   DocumentLink(this.offset, this.length, this.targetUri);
 }

 /// Computes [DocumentLink]s for package names in a 'pubspec.yaml'.
 class PubspecDocumentLinkComputer {
   final String pubHostedUrl;

   final _gitHubSsshUrlPrefixRegExp = RegExp(r'^git@github\.com:');

   PubspecDocumentLinkComputer(this.pubHostedUrl);

   List<DocumentLink> findLinks(String content) {
     YamlNode node;
     try {
       node = loadYamlNode(content);
     } catch (exception) {
       return [];
     }

     if (node is! YamlMap) return [];

     var allDependencies = [
       if (node.nodes['dependencies'] case YamlMap dependencies)
         ...dependencies.nodes.cast<YamlNode, YamlNode>().entries,
       if (node.nodes['dev_dependencies'] case YamlMap devDependencies)
         ...devDependencies.nodes.cast<YamlNode, YamlNode>().entries,
       if (node.nodes['dependency_overrides'] case YamlMap dependencyOverrides)
         ...dependencyOverrides.nodes.cast<YamlNode, YamlNode>().entries,
     ];

     var links = <DocumentLink>[];
     for (var MapEntry(key: packageName, value: packageSource)
         in allDependencies) {
       var packageLink = _computeLink(packageName, packageSource);

       if (packageLink != null) {
         var offset = packageName.span.start.offset;
         var length = packageName.span.length;
         links.add(DocumentLink(offset, length, packageLink));
       }
     }

     return links;
   }

   /// Attempts to compute a link for a Git URL.
   ///
   /// If the URL is already HTTP/HTTPS it can usually be used as-is. If it's
   /// an SSH git link, attempt to convert it to an HTTPS equivalent:
   ///
   ///   git@github.com:dart-lang/sdk.git -> https://github.com/dart-lang/sdk.git
   Uri? _computeGit(String gitUrl, String packageName) {
     // Perform substitions for SSH URLs that we know can safely be converted to
     // HTTPS.
     gitUrl =
         gitUrl.replaceFirst(_gitHubSsshUrlPrefixRegExp, 'https://github.com/');

     var uri = Uri.tryParse(gitUrl);
     return uri != null && (uri.isScheme('https') || uri.isScheme('http'))
         ? uri
         : null;
   }

   /// Computes a link in the form [hostedBase]/packages/[packageName]
   /// handling an optional trailing slash from [hostedBase].
   Uri _computeHosted(String hostedBase, String packageName) {
     var separator = hostedBase.endsWith('/') ? '' : '/';
     return Uri.parse('$hostedBase${separator}packages/$packageName');
   }

   /// Computes a link for the package at [packageNameNode] based on the source
   /// defined by [packageSource].
   Uri? _computeLink(YamlNode packageNameNode, YamlNode packageSource) {
     if (packageNameNode is! YamlScalar) return null;
     var name = packageNameNode.value;
     if (name is! String) return null;

     return switch (packageSource) {
       // Standard Pub packages.
       //   foo:
       //   foo: ^123
       YamlScalar() => _computeHosted(pubHostedUrl, name),

       // Hosted
       //
       // foo:
       //   hosted: http://foo/
       YamlMap(nodes: {'hosted': YamlScalar(value: String base)}) =>
         _computeHosted(base, name),

       // Hosted 2
       //
       // foo2:
       //   hosted:
       //     url: http://foo
       YamlMap(
         nodes: {
           'hosted': YamlMap(nodes: {'url': YamlScalar(value: String base)})
         }
       ) =>
         _computeHosted(base, name),

       // Git 1
       //
       // foo:
       //   git: git@github.com:dart-lang/sdk.git
       YamlMap(nodes: {'git': YamlScalar(value: String url)}) =>
         _computeGit(url, name),

       // Git 2
       //
       // foo2:
       //   git:
       //     url: http://foo
       YamlMap(
         nodes: {'git': YamlMap(nodes: {'url': YamlScalar(value: String url)})}
       ) =>
         _computeGit(url, name),

       // Unknown kind (such as path or sdk) that we can't produce a link for.
       _ => null,
     };
   }
 }
	// 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/dart/analysis/results.dart';
	import 'package:analyzer/dart/ast/doc_comment.dart';
	import 'package:analyzer/dart/ast/visitor.dart';
	import 'package:analyzer/file_system/file_system.dart';
	import 'package:analyzer/src/dart/ast/ast.dart';
	import 'package:analyzer/src/lint/registry.dart';
	import 'package:collection/collection.dart';
	import 'package:yaml/yaml.dart';

	/// Computes [DocumentLink]s for lint names in an 'analysis_options.yaml'.
	class AnalysisOptionLinkComputer {
	static const _lintsUrl = 'https://dart.dev/tools/linter-rules/';

	AnalysisOptionLinkComputer();

	List<DocumentLink> findLinks(String content) {
	YamlNode node;
	try {
	node = loadYamlNode(content);
	} catch (exception) {
	return [];
	}

	if (node is! YamlMap) return [];

	var allRules = <YamlNode>[
	if (node.nodes['linter'] case YamlMap dependencies)
	...switch (dependencies.nodes['rules']) {
	YamlMap(:var nodes) => nodes.keys.map((node) => node as YamlNode),
	YamlList rules => rules.nodes,
	_ => const <YamlNode>[],
	}
	];

	var links = <DocumentLink>[];
	for (var rule in allRules) {
	var packageLink = _computeLink(rule);

	if (packageLink != null) {
	var offset = rule.span.start.offset;
	var length = rule.span.length;
	links.add(DocumentLink(offset, length, packageLink));
	}
	}

	return links;
	}

	/// Computes a link for the rule named [rule].
	Uri? _computeLink(YamlNode rule) {
	if (rule is! YamlScalar) return null;
	var name = rule.value;
	if (name is! String) return null;

	var lint = Registry.ruleRegistry.rules
	.firstWhereOrNull((rule) => rule.name == name);
	if (lint == null) {
	return null;
	}

	return Uri.tryParse(_lintsUrl + name);
	}
	}

	/// A visitor to locate links to other documents in a file.
	///
	/// Such paths include "See example/a/b.dart" in documentation comments.
	class DartDocumentLinkVisitor extends RecursiveAstVisitor<void> {
	final ParsedUnitResult unit;
	final String filePath;
	final ResourceProvider resourceProvider;
	final _documentLinks = <DocumentLink>[];

	/// The directory that contains `examples/api`, `null` if not found.
	late final Folder? folderWithExamplesApi = () {
	var file = resourceProvider.getFile(filePath);
	for (var parent in file.parent.withAncestors) {
	var apiFolder = parent
	.getChildAssumingFolder('examples')
	.getChildAssumingFolder('api');
	if (apiFolder.exists) {
	return parent;
	}
	}
	return null;
	}();

	DartDocumentLinkVisitor(this.resourceProvider, this.unit)
	: filePath = unit.path;

	List<DocumentLink> findLinks(AstNode node) {
	_documentLinks.clear();
	node.accept(this);
	return _documentLinks;
	}

	@override
	void visitComment(Comment node) {
	super.visitComment(node);

	var content = unit.content;

	var toolDirectives = node.docDirectives
	.where((directive) => directive.type == DocDirectiveType.tool)
	.whereType<BlockDocDirective>();
	for (var toolDirective in toolDirectives) {
	var contentsStart = toolDirective.openingTag.end;
	var contentsEnd = toolDirective.closingTag?.offset;

	// Skip unclosed tags.
	if (contentsEnd == null) {
	continue;
	}

	var strValue = content.substring(contentsStart, contentsEnd);
	if (strValue.isEmpty) {
	continue;
	}

	var seeCodeIn = '** See code in ';
	var startIndex = strValue.indexOf('${seeCodeIn}examples/api/');
	if (startIndex != -1) {
	final folderWithExamplesApi = this.folderWithExamplesApi;
	if (folderWithExamplesApi == null) {
	// Examples directory doesn't exist.
	return;
	}
	startIndex += seeCodeIn.length;
	var endIndex = strValue.indexOf('.dart') + 5;
	var pathSnippet = strValue.substring(startIndex, endIndex);
	// Split on '/' because that's what the comment syntax uses, but
	// re-join it using the resource provider to get the right separator
	// for the platform.
	var examplePath = resourceProvider.pathContext.joinAll([
	folderWithExamplesApi.path,
	...pathSnippet.split('/'),
	]);
	var offset = contentsStart + startIndex;
	var length = endIndex - startIndex;
	_documentLinks.add(DocumentLink(offset, length, Uri.file(examplePath)));
	}
	}
	}
	}

	/// A link to another document or URI found in a source file.
	class DocumentLink {
	final Uri targetUri;
	final int offset;
	final int length;

	DocumentLink(this.offset, this.length, this.targetUri);
	}

	/// Computes [DocumentLink]s for package names in a 'pubspec.yaml'.
	class PubspecDocumentLinkComputer {
	final String pubHostedUrl;

	final _gitHubSsshUrlPrefixRegExp = RegExp(r'^git@github\.com:');

	PubspecDocumentLinkComputer(this.pubHostedUrl);

	List<DocumentLink> findLinks(String content) {
	YamlNode node;
	try {
	node = loadYamlNode(content);
	} catch (exception) {
	return [];
	}

	if (node is! YamlMap) return [];

	var allDependencies = [
	if (node.nodes['dependencies'] case YamlMap dependencies)
	...dependencies.nodes.cast<YamlNode, YamlNode>().entries,
	if (node.nodes['dev_dependencies'] case YamlMap devDependencies)
	...devDependencies.nodes.cast<YamlNode, YamlNode>().entries,
	if (node.nodes['dependency_overrides'] case YamlMap dependencyOverrides)
	...dependencyOverrides.nodes.cast<YamlNode, YamlNode>().entries,
	];

	var links = <DocumentLink>[];
	for (var MapEntry(key: packageName, value: packageSource)
	in allDependencies) {
	var packageLink = _computeLink(packageName, packageSource);

	if (packageLink != null) {
	var offset = packageName.span.start.offset;
	var length = packageName.span.length;
	links.add(DocumentLink(offset, length, packageLink));
	}
	}

	return links;
	}

	/// Attempts to compute a link for a Git URL.
	///
	/// If the URL is already HTTP/HTTPS it can usually be used as-is. If it's
	/// an SSH git link, attempt to convert it to an HTTPS equivalent:
	///
	/// git@github.com:dart-lang/sdk.git -> https://github.com/dart-lang/sdk.git
	Uri? _computeGit(String gitUrl, String packageName) {
	// Perform substitions for SSH URLs that we know can safely be converted to
	// HTTPS.
	gitUrl =
	gitUrl.replaceFirst(_gitHubSsshUrlPrefixRegExp, 'https://github.com/');

	var uri = Uri.tryParse(gitUrl);
	return uri != null && (uri.isScheme('https') \|\| uri.isScheme('http'))
	? uri
	: null;
	}

	/// Computes a link in the form [hostedBase]/packages/[packageName]
	/// handling an optional trailing slash from [hostedBase].
	Uri _computeHosted(String hostedBase, String packageName) {
	var separator = hostedBase.endsWith('/') ? '' : '/';
	return Uri.parse('$hostedBase${separator}packages/$packageName');
	}

	/// Computes a link for the package at [packageNameNode] based on the source
	/// defined by [packageSource].
	Uri? _computeLink(YamlNode packageNameNode, YamlNode packageSource) {
	if (packageNameNode is! YamlScalar) return null;
	var name = packageNameNode.value;
	if (name is! String) return null;

	return switch (packageSource) {
	// Standard Pub packages.
	// foo:
	// foo: ^123
	YamlScalar() => _computeHosted(pubHostedUrl, name),

	// Hosted
	//
	// foo:
	// hosted: http://foo/
	YamlMap(nodes: {'hosted': YamlScalar(value: String base)}) =>
	_computeHosted(base, name),

	// Hosted 2
	//
	// foo2:
	// hosted:
	// url: http://foo
	YamlMap(
	nodes: {
	'hosted': YamlMap(nodes: {'url': YamlScalar(value: String base)})
	}
	) =>
	_computeHosted(base, name),

	// Git 1
	//
	// foo:
	// git: git@github.com:dart-lang/sdk.git
	YamlMap(nodes: {'git': YamlScalar(value: String url)}) =>
	_computeGit(url, name),

	// Git 2
	//
	// foo2:
	// git:
	// url: http://foo
	YamlMap(
	nodes: {'git': YamlMap(nodes: {'url': YamlScalar(value: String url)})}
	) =>
	_computeGit(url, name),

	// Unknown kind (such as path or sdk) that we can't produce a link for.
	_ => null,
	};
	}
	}