Delete polymer from the Dart repo

pkg/polymer/bin/new_element.dart

-/// 
-/// Script to create boilerplate for a Polymer element.
-/// Produces .dart and .html files for the element.
-/// 
-/// Run this script with pub run:
-/// 
-///     pub run polymer:new_element element-name [-o output_dir]
-/// 
-import 'dart:io';
-import 'package:args/args.dart';
-import 'package:path/path.dart' as path show absolute, dirname, join, split;
-import 'package:polymer/html_element_names.dart';
-
-void printUsage(ArgParser parser) {
-  print('pub run polymer:new_element [-o output_dir] [-e super-element] '
-        'element-name');
-  print(parser.getUsage());
-}
-
-void main(List<String> args) {
-  var parser = new ArgParser(allowTrailingOptions: true);
-  
-  parser.addOption('output-dir', abbr: 'o', help: 'Output directory');
-  parser.addOption('extends', abbr: 'e', 
-      help: 'Extends polymer-element or DOM element (e.g., div, span)');
-  parser.addFlag('help', abbr: 'h');
-  
-  var options, element;
-  try {
-    options = parser.parse(args);
-    if (options['help']) {
-      printUsage(parser);
-      return;
-    }
-    if (options.rest == null || options.rest.isEmpty) {
-      throw new FormatException('No element specified');
-    }
-    element = options.rest[0];
-    if (!_isPolymerElement(element)) {
-      throw new FormatException('Must specify polymer-element to create.\n'
-          'polymer-element must be all lowercase with at least 1 hyphen.');
-    }
-  } catch(e) {
-    print('$e\n');
-    printUsage(parser);
-    exitCode = 1;
-    return;
-  } 
-  
-  var outputDir, startDir;
-  
-  var outputPath = options['output-dir'];
-  
-  if (outputPath == null) {
-    if ((new File('pubspec.yaml')).existsSync()) {
-      print('When creating elements in root directory of package, '
-          '-o <dir> must be specified');
-        exitCode = 1;
-        return;
-    }
-    outputDir = (new Directory('.')).resolveSymbolicLinksSync();
-  } else {
-    var outputDirLocation = new Directory(outputPath);
-    if (!outputDirLocation.existsSync()) {
-      outputDirLocation.createSync(recursive: true);
-    }
-    outputDir = (new Directory(outputPath)).resolveSymbolicLinksSync();
-  }
-
-  var pubspecDir = _findDirWithFile(outputDir, 'pubspec.yaml');
-  
-  if (pubspecDir == null) {
-    print('Could not find pubspec.yaml when walking up from $outputDir');
-    exitCode = 1;
-    return;
-  }
-
-  var length = path.split(pubspecDir).length;
-  var distanceToPackageRoot =
-      path.split(outputDir).length - length;
-
-  // See dartbug.com/20076 for the algorithm used here.
-  if (distanceToPackageRoot > 0) {
-    if (path.split(outputDir)[length] == 'lib') {
-      distanceToPackageRoot++;
-    } else {
-      distanceToPackageRoot--;
-    }
-  }
-  
-  var superElement = options['extends'];
-  
-  if ((superElement == null ) || 
-      _isDOMElement(superElement) ||
-      _isPolymerElement(superElement)) {
-    try {
-      _createBoilerPlate(element, options['extends'], outputDir, 
-          distanceToPackageRoot);
-    } on Exception catch(e, t) {
-      print('Error creating files in $outputDir');
-      print('$e $t');
-      exitCode = 1;
-      return;
-    }
-  } else {
-    if (superElement.contains('-')) {
-      print('Extending invalid element "$superElement". Polymer elements '
-          'may contain only lowercase letters at least one hyphen.');
-    } else {
-      print('Extending invalid element "$superElement". $superElement is not '
-          ' a builtin DOM type.');
-    }
-    exitCode = 1;
-    return;
-  }
- 
-  return;
-}
-
-String _findDirWithFile(String dir, String filename) {
-  while (!new File(path.join(dir, filename)).existsSync()) {
-    var parentDir = path.dirname(dir);
-    // If we reached root and failed to find it, bail.
-    if (parentDir == dir) return null;
-    dir = parentDir;
-  }
-  return dir;
-}
-
-bool _isDOMElement(String element) => (HTML_ELEMENT_NAMES[element] != null);
-
-bool _isPolymerElement(String element) {
-  return element.contains('-') && (element.toLowerCase() == element);
-}
-
-String _toCamelCase(String s) {
-  return s[0].toUpperCase() + s.substring(1);
-}
-
-void _createBoilerPlate(String element, String superClass, String directory,
-                        int distanceToPackageRoot) {
-  var segments = element.split('-');
-  var capitalizedName = segments.map((e) => _toCamelCase(e)).join('');
-  var underscoreName = element.replaceAll('-', '_'); 
-  var pathToPackages = '../' * distanceToPackageRoot;
-  
-  bool superClassIsPolymer = 
-      (superClass == null ? false : _isPolymerElement(superClass));
-
-  var classDeclaration = '';
-  var importDartHtml = '';
-  var polymerCreatedString = '';
-  var extendsElementString = '';
-  var shadowString = '';
-  
-  if (superClass == null) {
-    classDeclaration = '\nclass $capitalizedName extends PolymerElement {';
-  } else if (superClassIsPolymer) {
-    // The element being extended is a PolymerElement.
-    var camelSuperClass =
-        superClass.split('-').map((e) => _toCamelCase(e)).join('');
-    classDeclaration = 'class $capitalizedName extends $camelSuperClass {';
-    extendsElementString = ' extends="$superClass"';
-    shadowString = 
-        '\n    <!-- Render extended element\'s Shadow DOM here -->\n'
-        '    <shadow>\n    </shadow>';
-  } else {
-    // The element being extended is a DOM Class.
-    importDartHtml = "import 'dart:html';\n";
-    classDeclaration = 
-        'class $capitalizedName extends ${HTML_ELEMENT_NAMES[superClass]} '
-        'with Polymer, Observable {';
-    polymerCreatedString = '\n    polymerCreated();';
-    extendsElementString = ' extends="$superClass"';
-  }
-
-  String html = '''  
-<!-- import polymer-element's definition -->
-<link rel="import" href="${pathToPackages}packages/polymer/polymer.html">
-
-<polymer-element name="$element"$extendsElementString>
-  <template>
-    <style>
-      :host {
-        display: block;
-      }
-    </style>$shadowString
-    <!-- Template content here -->
-  </template>
-  <script type="application/dart" src="${underscoreName}.dart"></script>
-</polymer-element>
-''';
-
-  String htmlFile = path.join(directory, underscoreName + '.html');
-  new File(htmlFile).writeAsStringSync(html);
-
-  String dart = '''
-${importDartHtml}import 'package:polymer/polymer.dart';
-
-/**
- * A Polymer $element element.
- */
-@CustomTag('$element')
-$classDeclaration
-
-  /// Constructor used to create instance of ${capitalizedName}.
-  ${capitalizedName}.created() : super.created() {$polymerCreatedString
-  }
-
-  /*
-   * Optional lifecycle methods - uncomment if needed.
-   *
-
-  /// Called when an instance of $element is inserted into the DOM.
-  attached() {
-    super.attached();
-  }
-
-  /// Called when an instance of $element is removed from the DOM.
-  detached() {
-    super.detached();
-  }
-
-  /// Called when an attribute (such as  a class) of an instance of
-  /// $element is added, changed, or removed.
-  attributeChanged(String name, String oldValue, String newValue) {
-  }
-
-  /// Called when $element has been fully prepared (Shadow DOM created,
-  /// property observers set up, event listeners attached).
-  ready() {
-  }
-   
-  */
-  
-}
-''';
-
-  String dartFile = path.join(directory, underscoreName + '.dart');
-  new File(dartFile).writeAsStringSync(dart);
-  
-  print('Successfully created:');
-  print('  ' + path.absolute(path.join(directory, underscoreName + '.dart')));
-  print('  ' + path.absolute(path.join(directory, underscoreName + '.html')));
-}