Roll Observatory packages and add a roll script

web_components/lib/build/import_inliner.dart

Index: web_components/lib/build/import_inliner.dart
diff --git a/web_components/lib/build/import_inliner.dart b/web_components/lib/build/import_inliner.dart
deleted file mode 100644
index 1f562a7459202f1e2bcf891a30f6b4ed83e0bae6..0000000000000000000000000000000000000000
--- a/web_components/lib/build/import_inliner.dart
+++ /dev/null
@@ -1,366 +0,0 @@
-// Copyright (c) 2015, 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.
-library web_components.build.import_inliner;
-
-import 'dart:async';
-import 'dart:collection' show LinkedHashMap;
-import 'package:barback/barback.dart';
-import 'package:code_transformers/assets.dart';
-import 'package:code_transformers/messages/build_logger.dart';
-import 'package:html/dom.dart';
-import 'package:html/dom_parsing.dart' show TreeVisitor;
-import 'package:path/path.dart' as path;
-import 'package:source_span/source_span.dart';
-import 'common.dart';
-import 'import_crawler.dart';
-import 'messages.dart';
-
-/// Transformer which inlines all html imports found from the entry points. This
-/// deletes all dart scripts found during the inlining, so the
-/// [ScriptCompactorTransformer] should be ran first if there are any dart files
-/// in html imports.
-class ImportInlinerTransformer extends Transformer {
-  final List<String> entryPoints;
-  final List<String> bindingStartDelimiters;
-
-  ImportInlinerTransformer(
-      [this.entryPoints, this.bindingStartDelimiters = const []]);
-
-  bool isPrimary(AssetId id) {
-    if (entryPoints != null) return entryPoints.contains(id.path);
-    // If no entry point is supplied, then any html file under web/ or test/ is
-    // an entry point.
-    return (id.path.startsWith('web/') || id.path.startsWith('test/')) &&
-        id.path.endsWith('.html');
-  }
-
-  apply(Transform transform) {
-    var logger = new BuildLogger(transform, convertErrorsToWarnings: true);
-    return new ImportInliner(transform, transform.primaryInput.id, logger,
-        bindingStartDelimiters: bindingStartDelimiters).run();
-  }
-}
-
-/// Helper class which actually does all the inlining of html imports for a
-/// single entry point.
-class ImportInliner {
-  // Can be an AggregateTransform or Transform
-  final transform;
-  // The primary input to start from.
-  final AssetId primaryInput;
-  // The logger to use.
-  final BuildLogger logger;
-  // The start delimiters for template bindings, such as '{{' or '[['.
-  final List<String> bindingStartDelimiters;
-
-  ImportInliner(this.transform, this.primaryInput, this.logger,
-      {this.bindingStartDelimiters: const []});
-
-  Future run() {
-    var crawler = new ImportCrawler(transform, primaryInput, logger);
-    return crawler.crawlImports().then((imports) {
-      var primaryDocument = imports[primaryInput].document;
-
-      // Normalize urls in the entry point.
-      var changed = new _UrlNormalizer(
-              primaryInput, primaryInput, logger, bindingStartDelimiters)
-          .visit(primaryDocument);
-
-      // Inline things if needed, always have at least one (the entry point).
-      if (imports.length > 1) {
-        _inlineImports(primaryDocument, imports);
-      } else if (!changed &&
-          primaryDocument.querySelectorAll('link[rel="import"]').where(
-                  (import) => import.attributes['type'] != 'css').length ==
-              0) {
-        // If there were no url changes and no imports, then we are done.
-        return;
-      }
-
-      primaryDocument
-          .querySelectorAll('link[rel="import"]')
-          .where((import) => import.attributes['type'] != 'css')
-          .forEach((element) => element.remove());
-
-      transform.addOutput(
-          new Asset.fromString(primaryInput, primaryDocument.outerHtml));
-    });
-  }
-
-  void _inlineImports(
-      Document primaryDocument, LinkedHashMap<AssetId, ImportData> imports) {
-    // Add a hidden div at the top of the body, this is where we will inline
-    // all the imports.
-    var importWrapper = new Element.tag('div')..attributes['hidden'] = '';
-    var firstElement = primaryDocument.body.firstChild;
-    if (firstElement != null) {
-      primaryDocument.body.insertBefore(importWrapper, firstElement);
-    } else {
-      primaryDocument.body.append(importWrapper);
-    }
-
-    // Move all scripts/stylesheets/imports into the wrapper to maintain
-    // ordering.
-    _moveHeadToWrapper(primaryDocument, importWrapper);
-
-    // Add all the other imports!
-    imports.forEach((AssetId asset, ImportData data) {
-      if (asset == primaryInput) return;
-      var document = data.document;
-      // Remove all dart script tags.
-      document
-          .querySelectorAll('script[type="$dartType"]')
-          .forEach((script) => script.remove());
-      // Normalize urls in attributes and inline css.
-      new _UrlNormalizer(data.fromId, asset, logger, bindingStartDelimiters)
-          .visit(document);
-      // Replace the import with its contents by appending the nodes
-      // immediately before the import one at a time, and then removing the
-      // import from the document.
-      var element = data.element;
-      var parent = element.parent;
-      document.head.nodes
-          .toList(growable: false)
-          .forEach((child) => parent.insertBefore(child, element));
-      document.body.nodes
-          .toList(growable: false)
-          .forEach((child) => parent.insertBefore(child, element));
-      element.remove();
-    });
-  }
-}
-
-/// To preserve the order of scripts with respect to inlined
-/// link rel=import, we move both of those into the body before we do any
-/// inlining. We do not start doing this until the first import is found
-/// however, as some scripts do need to be ran in the head to work
-/// properly (webcomponents.js for instance).
-///
-/// Note: we do this for stylesheets as well to preserve ordering with
-/// respect to eachother, because stylesheets can be pulled in transitively
-/// from imports.
-void _moveHeadToWrapper(Document doc, Element wrapper) {
-  var foundImport = false;
-  for (var node in doc.head.nodes.toList(growable: false)) {
-    if (node is! Element) continue;
-    var tag = node.localName;
-    var type = node.attributes['type'];
-    var rel = node.attributes['rel'];
-    if (tag == 'link' && rel == 'import') foundImport = true;
-    if (!foundImport) continue;
-    if (tag == 'style' ||
-        tag == 'script' &&
-            (type == null || type == jsType || type == dartType) ||
-        tag == 'link' && (rel == 'stylesheet' || rel == 'import')) {
-      // Move the node into the wrapper, where its contents will be placed.
-      // This wrapper is a hidden div to prevent inlined html from causing a
-      // FOUC.
-      wrapper.append(node);
-    }
-  }
-}
-
-/// Internally adjusts urls in the html that we are about to inline.
-// TODO(jakemac): Everything from here down is almost an exact copy from the
-// polymer package. We should consolidate this logic by either removing it
-// completely from polymer or exposing it publicly here and using that in
-// polymer.
-class _UrlNormalizer extends TreeVisitor {
-  /// [AssetId] for the main entry point.
-  final AssetId primaryInput;
-
-  /// Asset where the original content (and original url) was found.
-  final AssetId sourceId;
-
-  /// Counter used to ensure that every library name we inject is unique.
-  int _count = 0;
-
-  /// Path to the top level folder relative to the transform primaryInput.
-  /// This should just be some arbitrary # of ../'s.
-  final String topLevelPath;
-
-  /// Whether or not the normalizer has changed something in the tree.
-  bool changed = false;
-
-  // The start delimiters for template bindings, such as '{{' or '[['. If these
-  // are found before the first `/` in a url, then the url will not be
-  // normalized.
-  final List<String> bindingStartDelimiters;
-
-  final BuildLogger logger;
-
-  _UrlNormalizer(AssetId primaryInput, this.sourceId, this.logger,
-      this.bindingStartDelimiters)
-      : primaryInput = primaryInput,
-        topLevelPath = '../' * (path.url.split(primaryInput.path).length - 2);
-
-  bool visit(Node node) {
-    super.visit(node);
-    return changed;
-  }
-
-  visitElement(Element node) {
-    // TODO(jakemac): Support custom elements that extend html elements which
-    // have url-like attributes. This probably means keeping a list of which
-    // html elements support each url-like attribute.
-    if (!isCustomTagName(node.localName)) {
-      node.attributes.forEach((name, value) {
-        if (_urlAttributes.contains(name)) {
-          node.attributes[name] = _newUrl(value, node.sourceSpan);
-          changed = value != node.attributes[name];
-        }
-      });
-    }
-    if (node.localName == 'style') {
-      node.text = visitCss(node.text);
-    } else if (node.localName == 'script' &&
-        node.attributes['type'] == dartType &&
-        !node.attributes.containsKey('src')) {
-      changed = true;
-    }
-    return super.visitElement(node);
-  }
-
-  static final _url = new RegExp(r'url\(([^)]*)\)', multiLine: true);
-  static final _quote = new RegExp('["\']', multiLine: true);
-
-  /// Visit the CSS text and replace any relative URLs so we can inline it.
-  // Ported from:
-  // https://github.com/Polymer/vulcanize/blob/c14f63696797cda18dc3d372b78aa3378acc691f/lib/vulcan.js#L149
-  // TODO(jmesserly): use csslib here instead? Parsing with RegEx is sadness.
-  // Maybe it's reliable enough for finding URLs in CSS? I'm not sure.
-  String visitCss(String cssText) {
-    var url = spanUrlFor(sourceId, primaryInput, logger);
-    var src = new SourceFile(cssText, url: url);
-    return cssText.replaceAllMapped(_url, (match) {
-      changed = true;
-      // Extract the URL, without any surrounding quotes.
-      var span = src.span(match.start, match.end);
-      var href = match[1].replaceAll(_quote, '');
-      href = _newUrl(href, span);
-      return 'url($href)';
-    });
-  }
-
-  String _newUrl(String href, SourceSpan span) {
-    // We only want to parse the part of the href leading up to the first
-    // folder, anything after that is not informative.
-    var hrefToParse;
-    var firstFolder = href.indexOf('/');
-    if (firstFolder == -1) {
-      hrefToParse = href;
-    } else if (firstFolder == 0) {
-      return href;
-    } else {
-      // Special case packages and assets urls.
-      if (href.contains('packages/')) {
-        var suffix = href.substring(href.indexOf('packages/') + 9);
-        return '${topLevelPath}packages/$suffix';
-      } else if (href.contains('assets/')) {
-        var suffix = href.substring(href.indexOf('assets/') + 7);
-        return '${topLevelPath}packages/$suffix';
-      }
-
-      hrefToParse = '${href.substring(0, firstFolder + 1)}';
-    }
-
-    // If we found a binding before the first `/`, then just return the original
-    // href, we can't determine anything about it.
-    if (bindingStartDelimiters.any((d) => hrefToParse.contains(d))) return href;
-
-    Uri uri;
-    // Various template systems introduce invalid characters to uris which would
-    // be typically replaced at runtime. Parse errors are assumed to be caused
-    // by this, and we just return the original href in that case.
-    try {
-      uri = Uri.parse(hrefToParse);
-    } catch (e) {
-      return href;
-    }
-    if (uri.isAbsolute) return href;
-    if (uri.scheme.isNotEmpty) return href;
-    if (uri.host.isNotEmpty) return href;
-    if (uri.path.isEmpty) return href; // Implies standalone ? or # in URI.
-    if (path.isAbsolute(hrefToParse)) return href;
-
-    var id = uriToAssetId(sourceId, hrefToParse, logger, span);
-    if (id == null) return href;
-
-    // Build the new path, placing back any suffixes that we stripped earlier.
-    var prefix =
-        (firstFolder == -1) ? id.path : id.path.substring(0, id.path.length);
-    var suffix = (firstFolder == -1) ? '' : href.substring(firstFolder);
-    var newPath = '$prefix$suffix';
-
-    if (newPath.startsWith('lib/')) {
-      return '${topLevelPath}packages/${id.package}/${newPath.substring(4)}';
-    }
-
-    if (newPath.startsWith('asset/')) {
-      return '${topLevelPath}assets/${id.package}/${newPath.substring(6)}';
-    }
-
-    if (primaryInput.package != id.package) {
-      // Technically we shouldn't get there
-      logger.error(internalErrorDontKnowHowToImport
-              .create({'target': id, 'source': primaryInput, 'extra': ''}),
-          span: span);
-      return href;
-    }
-
-    var builder = path.url;
-    return builder.normalize(builder.relative(builder.join('/', newPath),
-        from: builder.join('/', builder.dirname(primaryInput.path))));
-  }
-}
-
-/// Returns true if this is a valid custom element name. See:
-/// <http://w3c.github.io/webcomponents/spec/custom/#dfn-custom-element-type>
-bool isCustomTagName(String name) {
-  if (name == null || !name.contains('-')) return false;
-  return !invalidTagNames.containsKey(name);
-}
-
-/// These names have meaning in SVG or MathML, so they aren't allowed as custom
-/// tags. See [isCustomTagName].
-const invalidTagNames = const {
-  'annotation-xml': '',
-  'color-profile': '',
-  'font-face': '',
-  'font-face-src': '',
-  'font-face-uri': '',
-  'font-face-format': '',
-  'font-face-name': '',
-  'missing-glyph': '',
-};
-
-/// HTML attributes that expect a URL value.
-/// <http://dev.w3.org/html5/spec/section-index.html#attributes-1>
-///
-/// Every one of these attributes is a URL in every context where it is used in
-/// the DOM. The comments show every DOM element where an attribute can be used.
-///
-/// The _* version of each attribute is also supported, see http://goo.gl/5av8cU
-const _urlAttributes = const [
-  'action',
-  '_action', // in form
-  'background',
-  '_background', // in body
-  'cite',
-  '_cite', // in blockquote, del, ins, q
-  'data',
-  '_data', // in object
-  'formaction',
-  '_formaction', // in button, input
-  'href',
-  '_href', // in a, area, link, base, command
-  'icon',
-  '_icon', // in command
-  'manifest',
-  '_manifest', // in html
-  'poster',
-  '_poster', // in video
-  'src',
-  '_src', // in audio, embed, iframe, img, input, script, source, track,video
-];