Added --exclude-lib=docgen so that it does throw an error about markdown when building.

pkg/docgen/bin/docgen.dart

 // 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.
 
-/**
- * The docgen tool takes in a library as input and produces documentation
- * for the library as well as all libraries it imports and uses. The tool can
- * be run by passing in the path to a .dart file like this:
- *
- *   ./dart docgen.dart path/to/file.dart
- *
- * This outputs information about all classes, variables, functions, and
- * methods defined in the library and its imported libraries.
- */
-library docgen;
+import 'dart:io';
 
-// TODO(tmandel): Use 'package:' references for imports with relative paths.
-import 'dart:io';
-import 'dart:json';
-import 'dart:async';
-import '../lib/dart2yaml.dart';
-import '../lib/src/dart2js_mirrors.dart';
-import 'package:markdown/markdown.dart' as markdown;
-import '../../args/lib/args.dart';
+import 'package:args/args.dart';
+import 'package:logging/logging.dart';
+
+import '../lib/docgen.dart';
 import '../../../sdk/lib/_internal/compiler/implementation/mirrors/mirrors.dart';
 import '../../../sdk/lib/_internal/compiler/implementation/mirrors/mirrors_util.dart';
 
 /**
- * Entry function to create YAML documentation from Dart files.
+ * Analyzes Dart files and generates a representation of included libraries, 
+ * classes, and members. 
  */
 void main() {
-  // TODO(tmandel): Use args library once flags are clear.
-  Options opts = new Options();
-  Docgen docgen = new Docgen();
-  
-  if (opts.arguments.length > 0) {
-    List<Path> libraries = [new Path(opts.arguments[0])];
-    Path sdkDirectory = new Path("../../../sdk/");
-    var workingMirrors = analyze(libraries, sdkDirectory, 
-        options: ['--preserve-comments', '--categories=Client,Server']);
-    workingMirrors.then( (MirrorSystem mirrorSystem) {
-      var mirrors = mirrorSystem.libraries.values;
-      if (mirrors.isEmpty) {
-        print("no LibraryMirrors");
-      } else {
-        docgen.libraries = mirrors;
-        docgen.documentLibraries();
-      }
-    });
-  }
+  logger.onRecord.listen((record) => print(record.message));
+  var results = initArgParser().parse(new Options().arguments);
+  if (results["help"]) return;  
+  new Docgen(results).analyze(listLibraries(results.rest));
 }
 
 /**
- * This class documents a list of libraries.
+ * Creates parser for docgen command line arguments. 
  */
-class Docgen {
-
-  /// Libraries to be documented.
-  List<LibraryMirror> _libraries;
+ArgParser initArgParser() {
+  var parser = new ArgParser();
+  parser.addFlag("help", abbr: "h", 
+      help: "Prints help and usage information.", 
+      negatable: false, 
+      callback: (help) {
+        if (help) {
+          logger.info(parser.getUsage());
+          logger.info(usage);
+        }
+      });
+  parser.addFlag("verbose", abbr: "v", 
+      help: "Output more logging information.", negatable: false, 
+      callback: (verbose) {
+        if (verbose) Logger.root.level = Level.FINEST;
+      });
+  parser.addOption("output-format", abbr: "o", 
+      help: "Sets the output format.", 
+      allowed: ["yaml", "json"], 
+      allowedHelp: {"yaml" : "Outputs to YAML.", 
+        "json" : "Outputs to JSON."});
+  parser.addFlag("yaml", abbr: "y", 
+      help: "Same as output-format=yaml.", negatable: false);
+  parser.addFlag("json", abbr: "j", 
+      help: "Same as output-format=json.", negatable: false);
+  parser.addFlag("include-private", 
+      help: "Flag to include private declarations.", negatable: false);
+  parser.addFlag("include-sdk", 
+      help: "Flag to parse SDK Library files.", negatable: false);
   
-  /// Saves list of libraries for Docgen object.
-  void set libraries(value) => _libraries = value;
-  
-  /// Current library being documented to be used for comment links.
-  LibraryMirror _currentLibrary;
-  
-  /// Current class being documented to be used for comment links.
-  ClassMirror _currentClass;
-  
-  /// Current member being documented to be used for comment links.
-  MemberMirror _currentMember;
-  
-  /// Should the output file type be JSON?
-  // TODO(tmandel): Add flag to allow for output to JSON.
-  bool outputToJson = false;
-  
-  /// Resolves reference links
-  markdown.Resolver linkResolver;
-  
-  /**
-   * Docgen constructor initializes the link resolver for markdown parsing.
-   */
-  Docgen() {
-    this.linkResolver = (name) => 
-        fixReference(name, _currentLibrary, _currentClass, _currentMember);
-  }
-  
-  /**
-   * Creates documentation for filtered libraries.
-   */
-  void documentLibraries() {
-    //TODO(tmandel): Filter libraries and determine output type using flags.
-    _libraries.forEach((library) {
-      _currentLibrary = library;
-      var result = new Library(library.qualifiedName, _getComment(library),
-          _getVariables(library.variables), _getMethods(library.functions),
-          _getClasses(library.classes));
-      if (outputToJson) {
-        _writeToFile(stringify(result.toMap()), "${result.name}.json");
-      } else {
-        _writeToFile(getYamlString(result.toMap()), "${result.name}.yaml");
-      }
-    });
-   }
-  
-  /**
-   * Returns any documentation comments associated with a mirror with
-   * simple markdown converted to html.
-   */
-  String _getComment(DeclarationMirror mirror) {
-    String commentText;
-    mirror.metadata.forEach((metadata) {
-      if (metadata is CommentInstanceMirror) {
-        CommentInstanceMirror comment = metadata;
-        if (comment.isDocComment) {
-          if (commentText == null) {
-            commentText = comment.trimmedText;
-          } else {
-            commentText = "$commentText ${comment.trimmedText}";
-          }
-        } 
-      }
-    });
-    return commentText == null ? "" : 
-      markdown.markdownToHtml(commentText.trim(), linkResolver: linkResolver);
-  }
-
-  /**
-   * Converts all [_] references in comments to <code>_</code>.
-   */
-  // TODO(tmandel): Create proper links for [_] style markdown based
-  // on scope once layout of viewer is finished.
-  markdown.Node fixReference(String name, LibraryMirror currentLibrary, 
-      ClassMirror currentClass, MemberMirror currentMember) {
-    return new markdown.Element.text('code', name);
-  }
-  
-  /**
-   * Returns a map of [Variable] objects constructed from inputted mirrors.
-   */
-  Map<String, Variable> _getVariables(Map<String, VariableMirror> mirrorMap) {
-    var data = {};
-    mirrorMap.forEach((String mirrorName, VariableMirror mirror) {
-      _currentMember = mirror;
-      data[mirrorName] = new Variable(mirrorName, mirror.isFinal,
-          mirror.isStatic, mirror.type.toString(), _getComment(mirror));
-    });
-    return data;
-  }
-  
-  /**
-   * Returns a map of [Method] objects constructed from inputted mirrors.
-   */
-  Map<String, Method> _getMethods(Map<String, MethodMirror> mirrorMap) {
-    var data = {};
-    mirrorMap.forEach((String mirrorName, MethodMirror mirror) {
-      _currentMember = mirror;
-      data[mirrorName] = new Method(mirrorName, mirror.isSetter,
-          mirror.isGetter, mirror.isConstructor, mirror.isOperator, 
-          mirror.isStatic, mirror.returnType.toString(), _getComment(mirror),
-          _getParameters(mirror.parameters));
-    });
-    return data;
-  } 
-  
-  /**
-   * Returns a map of [Class] objects constructed from inputted mirrors.
-   */
-  Map<String, Class> _getClasses(Map<String, ClassMirror> mirrorMap) {
-    var data = {};
-    mirrorMap.forEach((String mirrorName, ClassMirror mirror) {
-      _currentClass = mirror;
-      var superclass;
-      if (mirror.superclass != null) {
-        superclass = mirror.superclass.qualifiedName;
-      }
-      var interfaces = 
-          mirror.superinterfaces.map((interface) => interface.qualifiedName);
-      data[mirrorName] = new Class(mirrorName, superclass, mirror.isAbstract,
-          mirror.isTypedef, _getComment(mirror), interfaces,
-          _getVariables(mirror.variables), _getMethods(mirror.methods));
-    });
-    return data;
-  }
-  
-  /**
-   * Returns a map of [Parameter] objects constructed from inputted mirrors.
-   */
-  Map<String, Parameter> _getParameters(List<ParameterMirror> mirrorList) {
-    var data = {};
-    mirrorList.forEach((ParameterMirror mirror) {
-      _currentMember = mirror;
-      data[mirror.simpleName] = new Parameter(mirror.simpleName, 
-          mirror.isOptional, mirror.isNamed, mirror.hasDefaultValue, 
-          mirror.type.toString(), mirror.defaultValue);
-    });
-    return data;
-  }
+  return parser;
 }
-
-/**
- * Transforms the map by calling toMap on each value in it.
- */
-Map recurseMap(Map inputMap) {
-  var outputMap = {};
-  inputMap.forEach((key, value) {
-    outputMap[key] = value.toMap();
-  });
-  return outputMap;
-}
-
-/**
- * A class containing contents of a Dart library.
- */
-class Library {
-  
-  /// Documentation comment with converted markdown.
-  String comment;
-  
-  /// Top-level variables in the library.
-  Map<String, Variable> variables;
-  
-  /// Top-level functions in the library.
-  Map<String, Method> functions;
-  
-  /// Classes defined within the library
-  Map<String, Class> classes;
-  
-  String name;
-  
-  Library(this.name, this.comment, this.variables, 
-      this.functions, this.classes);
-  
-  /// Generates a map describing the [Library] object.
-  Map toMap() {
-    var libraryMap = {};
-    libraryMap["name"] = name;
-    libraryMap["comment"] = comment;
-    libraryMap["variables"] = recurseMap(variables);
-    libraryMap["functions"] = recurseMap(functions);
-    libraryMap["classes"] = recurseMap(classes);
-    return libraryMap;
-  }
-}
-
-/**
- * A class containing contents of a Dart class.
- */
-// TODO(tmandel): Figure out how to do typedefs (what is needed)
-class Class {
-  
-  /// Documentation comment with converted markdown.
-  String comment;
-  
-  /// List of the names of interfaces that this class implements.
-  List<String> interfaces;
-  
-  /// Top-level variables in the class.
-  Map<String, Variable> variables;
-  
-  /// Methods in the class.
-  Map<String, Method> methods;
-  
-  String name;
-  String superclass;
-  bool isAbstract;
-  bool isTypedef;
- 
-  Class(this.name, this.superclass, this.isAbstract, this.isTypedef,
-      this.comment, this.interfaces, this.variables, this.methods); 
-  
-  /// Generates a map describing the [Class] object.
-  Map toMap() {
-    var classMap = {};
-    classMap["name"] = name;
-    classMap["comment"] = comment;
-    classMap["superclass"] = superclass;
-    classMap["abstract"] = isAbstract.toString();
-    classMap["typedef"] = isTypedef.toString();
-    classMap["implements"] = new List.from(interfaces);
-    classMap["variables"] = recurseMap(variables);
-    classMap["methods"] = recurseMap(methods);
-    return classMap;
-  }
-}
-
-/**
- * A class containing properties of a Dart variable.
- */
-class Variable {
-  
-  /// Documentation comment with converted markdown.
-  String comment;
-  
-  String name;
-  bool isFinal;
-  bool isStatic;
-  String type;
-  
-  Variable(this.name, this.isFinal, this.isStatic, this.type, this.comment);
-  
-  /// Generates a map describing the [Variable] object.
-  Map toMap() {
-    var variableMap = {};
-    variableMap["name"] = name;
-    variableMap["comment"] = comment;
-    variableMap["final"] = isFinal.toString();
-    variableMap["static"] = isStatic.toString();
-    variableMap["type"] = type;
-    return variableMap;
-  }
-}
-
-/**
- * A class containing properties of a Dart method.
- */
-class Method {
-  
-  /// Documentation comment with converted markdown.
-  String comment;
-  
-  /// Parameters for this method.
-  Map<String, Parameter> parameters;
-  
-  String name;
-  bool isSetter;
-  bool isGetter;
-  bool isConstructor;
-  bool isOperator;
-  bool isStatic;
-  String returnType;
-  
-  Method(this.name, this.isSetter, this.isGetter, this.isConstructor,
-      this.isOperator, this.isStatic, this.returnType, this.comment,
-      this.parameters);
-  
-  /// Generates a map describing the [Method] object.
-  Map toMap() {
-    var methodMap = {};
-    methodMap["name"] = name;
-    methodMap["comment"] = comment;
-    methodMap["type"] = isSetter ? "setter" : isGetter ? "getter" :
-      isOperator ? "operator" : isConstructor ? "constructor" : "method";
-    methodMap["static"] = isStatic.toString();
-    methodMap["return"] = returnType;
-    methodMap["parameters"] = recurseMap(parameters);
-    return methodMap;
-  }  
-}
-
-/**
- * A class containing properties of a Dart method/function parameter.
- */
-class Parameter {
-  
-  String name;
-  bool isOptional;
-  bool isNamed;
-  bool hasDefaultValue;
-  String type;
-  String defaultValue;
-  
-  Parameter(this.name, this.isOptional, this.isNamed, this.hasDefaultValue,
-      this.type, this.defaultValue);
-  
-  /// Generates a map describing the [Parameter] object.
-  Map toMap() {
-    var parameterMap = {};
-    parameterMap["name"] = name;
-    parameterMap["optional"] = isOptional.toString();
-    parameterMap["named"] = isNamed.toString();
-    parameterMap["default"] = hasDefaultValue.toString();
-    parameterMap["type"] = type;
-    parameterMap["value"] = defaultValue;
-    return parameterMap;
-  } 
-}
-
-/**
- * Writes text to a file in the 'docs' directory.
- */
-void _writeToFile(String text, String filename) {
-  Directory dir = new Directory('docs');
-  if (!dir.existsSync()) {
-    dir.createSync();
-  }
-  File file = new File('docs/$filename');
-  if (!file.exists()) {
-    file.createSync();
-  }
-  file.openSync();
-  file.writeAsString(text);
-}