Revert "Attempt to re-commit Dartdoc exports."

sdk/lib/_internal/dartdoc/lib/src/export_map.dart

Index: sdk/lib/_internal/dartdoc/lib/src/export_map.dart
diff --git a/sdk/lib/_internal/dartdoc/lib/src/export_map.dart b/sdk/lib/_internal/dartdoc/lib/src/export_map.dart
deleted file mode 100644
index 4e892cce82606e2b425f73e809531bbbccfc4bdd..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/dartdoc/lib/src/export_map.dart
+++ /dev/null
@@ -1,342 +0,0 @@
-// Copyright (c) 2013, 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.
-
-/// This library uses the Dart analyzer to find the exports for a set of
-/// libraries. It stores these exports in an [ExportMap]. This is used to
-/// display exported members as part of the exporting library, since dart2js
-/// doesn't provide this information itself.
-library export_map;
-
-import 'dart:io';
-import 'dart:uri';
-
-import 'package:analyzer_experimental/src/generated/ast.dart';
-import 'package:analyzer_experimental/src/generated/error.dart';
-import 'package:analyzer_experimental/src/generated/parser.dart';
-import 'package:analyzer_experimental/src/generated/scanner.dart';
-import 'package:analyzer_experimental/src/generated/source.dart';
-import 'package:pathos/path.dart' as pathos;
-
-import 'dartdoc/utils.dart';
-
-/// A class that tracks which libraries export which other libraries.
-class ExportMap {
-  /// A map from libraries to their [Export]s.
-  ///
-  /// Each key is the absolute path of a library on the filesystem, and each
-  /// value is a list of [Export]s for that library. There's guaranteed to be
-  /// only one [Export] of a given library in a given list.
-  final Map<String, List<Export>> exports;
-
-  /// A cache of the transitive exports for each library. The keys are paths to
-  /// libraries. The values are maps from the exported path to the [Export]
-  /// objects, to make it easier to merge multiple exports of the same library.
-  final _transitiveExportsByPath = <String, Map<String, Export>>{};
-
-  /// Parse an export map from a set of [libraries], which should be Dart import
-  /// [Uri]s. [packageRoot] should be the path to the `packages` directory to
-  /// use when resolving `package:` imports and libraries. Libraries that are
-  /// not available on the local machine will be ignored.
-  ///
-  /// In addition to parsing the exports in [libraries], this will parse the
-  /// exports in all libraries transitively reachable from [libraries] via
-  /// `import` or `export`.
-  factory ExportMap.parse(Iterable<Uri> libraries, String packageRoot) {
-    var exports = <String, List<Export>>{};
-
-    void traverse(String path) {
-      if (exports.containsKey(path)) return;
-
-      var importsAndExports;
-      try {
-        importsAndExports = _importsAndExportsForFile(path, packageRoot);
-      } on FileIOException catch (_) {
-        // Ignore unreadable/nonexistent files.
-        return;
-      }
-
-      var exportsForLibrary = <String, Export>{};
-      for (var export in importsAndExports.last) {
-        addOrMergeExport(exportsForLibrary, export.path, export);
-      }
-      exports[path] = new List.from(exportsForLibrary.values);
-      exports[path].map((directive) => directive.path).forEach(traverse);
-      importsAndExports.first.forEach(traverse);
-    }
-
-    for (var library in libraries) {
-      var path = importUriToPath(library, packageRoot: packageRoot);
-      if (path != null) traverse(path);
-    }
-
-    return new ExportMap._(exports);
-  }
-
-  ExportMap._(this.exports);
-
-  /// Returns a list of all the paths of exported libraries that [this] is aware
-  /// of.
-  List<String> get allExportedFiles => exports.values.expand((e) => e)
-      .map((directive) => directive.path).toList();
-
-  /// Returns a list of all exports that [library] transitively exports. This
-  /// means that if [library] exports another library that in turn exports a
-  /// third, the third library will be included in the returned list.
-  ///
-  /// This will automatically handle nested `hide` and `show` directives on the
-  /// exports, as well as merging multiple exports of the same library.
-  List<Export> transitiveExports(String library) {
-    Map<String, Export> _getTransitiveExportsByPath(String path) {
-      if (_transitiveExportsByPath.containsKey(path)) {
-        return _transitiveExportsByPath[path];
-      }
-
-      var exportsByPath = <String, Export>{};
-      _transitiveExportsByPath[path] = exportsByPath;
-      if (exports[path] == null) return exportsByPath;
-
-      for (var export in exports[path]) {
-        exportsByPath[export.path] = export;
-      }
-
-      for (var export in exports[path]) {
-        for (var subExport in _getTransitiveExportsByPath(export.path).values) {
-          subExport = export.compose(subExport);
-          if (exportsByPath.containsKey(subExport.path)) {
-            subExport = subExport.merge(exportsByPath[subExport.path]);
-          }
-          exportsByPath[subExport.path] = subExport;
-        }
-      }
-      return exportsByPath;
-    }
-
-    var path = pathos.normalize(pathos.absolute(library));
-    return _getTransitiveExportsByPath(path).values.toList();
-  }
-}
-
-/// A class that represents one library exporting another.
-class Export {
-  /// The absolute path of the library that contains this export.
-  final String exporter;
-
-  /// The absolute path of the library being exported.
-  final String path;
-
-  /// The set of identifiers that are explicitly being exported. If this is
-  /// non-empty, no identifiers other than these will be visible.
-  ///
-  /// One or both of [show] and [hide] will always be empty.
-  Set<String> get show => _show;
-  Set<String> _show;
-
-  /// The set of identifiers that are not exported.
-  ///
-  /// One or both of [show] and [hide] will always be empty.
-  Set<String> get hide => _hide;
-  Set<String> _hide;
-
-  /// Whether or not members exported are hidden by default.
-  bool get _hideByDefault => !show.isEmpty;
-
-  /// Creates a new export.
-  ///
-  /// This will normalize [show] and [hide] so that if both are non-empty, only
-  /// [show] will be set.
-  Export(this.exporter, this.path, {Iterable<String> show,
-      Iterable<String> hide}) {
-    _show = new Set<String>.from(show == null ? [] : show);
-    _hide = new Set<String>.from(hide == null ? [] : hide);
-
-    if (!_show.isEmpty) {
-      _show.removeAll(_hide);
-      _hide = new Set<String>();
-    }
-  }
-
-  /// Returns a new [Export] that represents [this] composed with [nested], as
-  /// though [this] was used to export a library that in turn exported [nested].
-  Export compose(Export nested) {
-    var show = new Set<String>();
-    var hide = new Set<String>();
-
-    if (this._hideByDefault) {
-      show.addAll(this.show);
-      if (nested._hideByDefault) {
-        show.retainAll(nested.show);
-      } else {
-        show.removeAll(nested.hide);
-      }
-    } else if (nested._hideByDefault) {
-      show.addAll(nested.show);
-      show.removeAll(this.hide);
-    } else {
-      hide.addAll(this.hide);
-      hide.addAll(nested.hide);
-    }
-
-    return new Export(this.exporter, nested.path, show: show, hide: hide);
-  }
-
-  /// Returns a new [Export] that merges [this] with [nested], as though both
-  /// exports were included in the same library.
-  ///
-  /// [this] and [other] must have the same values for [exporter] and [path].
-  Export merge(Export other) {
-    if (this.path != other.path) {
-      throw new ArgumentError("Can't merge two Exports with different paths: "
-          "export '$path' from '$exporter' and export '${other.path}' from "
-          "'${other.exporter}'.");
-    } if (this.exporter != other.exporter) {
-      throw new ArgumentError("Can't merge two Exports with different "
-          "exporters: export '$path' from '$exporter' and export "
-          "'${other.path}' from '${other.exporter}'.");
-    }
-
-    var show = new Set<String>();
-    var hide = new Set<String>();
-
-    if (this._hideByDefault) {
-      if (other._hideByDefault) {
-        show.addAll(this.show);
-        show.addAll(other.show);
-      } else {
-        hide.addAll(other.hide);
-        hide.removeAll(this.show);
-      }
-    } else {
-      hide.addAll(this.hide);
-      if (other._hideByDefault) {
-        hide.removeAll(other.show);
-      } else {
-        hide.retainAll(other.hide);
-      }
-    }
-
-    return new Export(exporter, path, show: show, hide: hide);
-  }
-
-  /// Returns whether or not a member named [name] is visible through this
-  /// import, as goverend by [show] and [hide].
-  bool isMemberVisible(String name) =>
-    _hideByDefault ? show.contains(name) : !hide.contains(name);
-
-  bool operator==(other) => other is Export && other.exporter == exporter &&
-      other.path == path && show.containsAll(other.show) &&
-      other.show.containsAll(show) && hide.containsAll(other.hide) &&
-      other.hide.containsAll(hide);
-
-  int get hashCode {
-    var hashCode = exporter.hashCode ^ path.hashCode;
-    hashCode = show.reduce(hashCode, (hash, name) => hash ^ name.hashCode);
-    return hide.reduce(hashCode, (hash, name) => hash ^ name.hashCode);
-  }
-
-  String toString() {
-    var combinator = '';
-    if (!show.isEmpty) {
-      combinator = ' show ${show.join(', ')}';
-    } else if (!hide.isEmpty) {
-      combinator = ' hide ${hide.join(', ')}';
-    }
-    return "export '$path'$combinator (from $exporter)";
-  }
-}
-
-/// Returns a list of imports and a list of exports for the dart library at
-/// [file]. [packageRoot] is used to resolve `package:` URLs.
-///
-/// The imports are a list of absolute paths, while the exports are [Export]
-/// objects.
-Pair<List<String>, List<Export>> _importsAndExportsForFile(String file,
-    String packageRoot) {
-  var collector = new _ImportExportCollector();
-  _parseFile(file).accept(collector);
-
-  var imports = collector.imports.map((import) {
-    return _pathForDirective(import, pathos.dirname(file), packageRoot);
-  }).where((import) => import != null).toList();
-
-  var exports = collector.exports.map((export) {
-    var path = _pathForDirective(export, pathos.dirname(file), packageRoot);
-    if (path == null) return null;
-
-    path = pathos.normalize(pathos.absolute(path));
-    var show = export.combinators
-        .where((combinator) => combinator is ShowCombinator)
-        .expand((combinator) => combinator.shownNames.map((name) => name.name));
-    var hide = export.combinators
-        .where((combinator) => combinator is HideCombinator)
-        .expand((combinator) =>
-            combinator.hiddenNames.map((name) => name.name));
-
-    return new Export(file, path, show: show, hide: hide);
-  }).where((export) => export != null).toList();
-
-  return new Pair<List<String>, List<Export>>(imports, exports);
-}
-
-/// Returns the absolute path to the library imported by [directive], or `null`
-/// if it doesn't refer to a file on the local filesystem.
-///
-/// [basePath] is the path from which relative imports should be resolved.
-/// [packageRoot] is the path from which `package:` imports should be resolved.
-String _pathForDirective(NamespaceDirective directive, String basePath,
-    String packageRoot) {
-  var uri = Uri.parse(_stringLiteralToString(directive.uri));
-  var path = importUriToPath(uri, basePath: basePath, packageRoot: packageRoot);
-  if (path == null) return null;
-  return pathos.normalize(pathos.absolute(path));
-}
-
-/// Parses a Dart file into an AST.
-CompilationUnit _parseFile(String path) {
-  var contents = new File(path).readAsStringSync();
-  var errorCollector = new _ErrorCollector();
-  var scanner = new StringScanner(null, contents, errorCollector);
-  var token = scanner.tokenize();
-  var parser = new Parser(null, errorCollector);
-  var unit = parser.parseCompilationUnit(token);
-  unit.lineInfo = new LineInfo(scanner.lineStarts);
-
-  if (!errorCollector.errors.isEmpty) {
-    throw new FormatException(
-        errorCollector.errors.map((e) => e.toString()).join("\n"));
-  }
-
-  return unit;
-}
-
-/// A simple error listener that collects errors into a list.
-class _ErrorCollector extends AnalysisErrorListener {
-  final errors = <AnalysisError>[];
-
-  _ErrorCollector();
-
-  void onError(AnalysisError error) => errors.add(error);
-}
-
-/// A simple visitor that collects import and export nodes.
-class _ImportExportCollector extends GeneralizingASTVisitor {
-  final imports = <ImportDirective>[];
-  final exports = <ExportDirective>[];
-
-  _ImportExportCollector();
-
-  visitImportDirective(ImportDirective node) => imports.add(node);
-  visitExportDirective(ExportDirective node) => exports.add(node);
-}
-
-// TODO(nweiz): fold this into the analyzer (issue 9781).
-/// Converts an AST node representing a string literal into a [String].
-String _stringLiteralToString(StringLiteral literal) {
-  if (literal is AdjacentStrings) {
-    return literal.strings.map(_stringLiteralToString).join();
-  } else if (literal is SimpleStringLiteral) {
-    return literal.value;
-  } else {
-    throw new ArgumentError('Unknown string type for $literal');
-  }
-}