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polymer/lib/src/build/common.dart

Index: polymer/lib/src/build/common.dart
diff --git a/polymer/lib/src/build/common.dart b/polymer/lib/src/build/common.dart
deleted file mode 100644
index 31c63e0e0f88ab9a8183554e2eb375053268656b..0000000000000000000000000000000000000000
--- a/polymer/lib/src/build/common.dart
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@@ -1,280 +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.
-
-/// Common methods used by transfomers.
-library polymer.src.build.common;
-
-import 'dart:async';
-
-import 'package:analyzer/src/generated/ast.dart';
-import 'package:analyzer/src/generated/error.dart';
-import 'package:analyzer/src/generated/parser.dart';
-import 'package:analyzer/src/generated/scanner.dart';
-import 'package:barback/barback.dart';
-import 'package:code_transformers/messages/build_logger.dart';
-import 'package:html/dom.dart' show Document;
-import 'package:html/parser.dart' show HtmlParser;
-import 'package:observe/transformer.dart' show ObservableTransformer;
-import 'package:path/path.dart' as path;
-
-import 'constants.dart';
-import 'messages.dart';
-
-export 'constants.dart';
-
-const _ignoredErrors = const [
-  'unexpected-dash-after-double-dash-in-comment',
-  'unexpected-char-in-comment',
-];
-
-/// Parses an HTML file [contents] and returns a DOM-like tree. Adds emitted
-/// error/warning to [logger].
-Document _parseHtml(String contents, String sourcePath, BuildLogger logger,
-    {bool checkDocType: true, bool showWarnings: true}) {
-  // TODO(jmesserly): make HTTP encoding configurable
-  var parser = new HtmlParser(contents,
-      encoding: 'utf8', generateSpans: true, sourceUrl: sourcePath);
-  var document = parser.parse();
-
-  // Note: errors aren't fatal in HTML (unless strict mode is on).
-  // So just print them as warnings.
-  if (showWarnings) {
-    for (var e in parser.errors) {
-      if (_ignoredErrors.contains(e.errorCode)) continue;
-      if (checkDocType || e.errorCode != 'expected-doctype-but-got-start-tag') {
-        logger.warning(HTML5_WARNING.create({'message': e.message}),
-            span: e.span);
-      }
-    }
-  }
-  return document;
-}
-
-/// Additional options used by polymer transformers
-class TransformOptions {
-  /// List of entrypoints paths. The paths are relative to the package root and
-  /// are represented using posix style, which matches the representation used
-  /// in asset ids in barback. If null, anything under 'web/' or 'test/' is
-  /// considered an entry point.
-  final List<String> entryPoints;
-
-  /// Map of stylesheet paths that should or should not be inlined. The paths
-  /// are relative to the package root and are represented using posix style,
-  /// which matches the representation used in asset ids in barback.
-  ///
-  /// There is an additional special key 'default' for the global default.
-  final Map<String, bool> inlineStylesheets;
-
-  /// True to enable Content Security Policy.
-  /// This means the HTML page will not have inlined .js code.
-  final bool contentSecurityPolicy;
-
-  /// True to include the compiled JavaScript directly from the HTML page.
-  /// If enabled this will remove "packages/browser/dart.js" and replace
-  /// `type="application/dart"` scripts with equivalent *.dart.js files.
-  final bool directlyIncludeJS;
-
-  /// Run transformers to create a releasable app. For example, include the
-  /// minified versions of the polyfills rather than the debug versions.
-  final bool releaseMode;
-
-  /// This will make a physical element appear on the page showing build logs.
-  /// It will only appear when ![releaseMode] even if this is true.
-  final bool injectBuildLogsInOutput;
-
-  /// Rules to determine whether to run liner on an html file.
-  // TODO(jmesserly): instead of this flag, we should only run linter on
-  // reachable (entry point+imported) html if deploying. See dartbug.com/17199.
-  final LintOptions lint;
-
-  /// This will automatically inject the polyfills from the `web_components`
-  /// package in all entry points, if it is not already included.
-  final bool injectWebComponentsJs;
-
-  TransformOptions({entryPoints, this.inlineStylesheets,
-      this.contentSecurityPolicy: false, this.directlyIncludeJS: true,
-      this.releaseMode: true, this.lint: const LintOptions(),
-      this.injectBuildLogsInOutput: false, this.injectWebComponentsJs: true})
-      : entryPoints = entryPoints == null
-          ? null
-          : entryPoints.map(systemToAssetPath).toList();
-
-  /// Whether an asset with [id] is an entry point HTML file.
-  bool isHtmlEntryPoint(AssetId id) {
-    if (id.extension != '.html') return false;
-
-    // Note: [id.path] is a relative path from the root of a package.
-    if (entryPoints == null) {
-      return id.path.startsWith('web/') || id.path.startsWith('test/');
-    }
-
-    return entryPoints.contains(id.path);
-  }
-
-  // Whether a stylesheet with [id] should be inlined, the default is true.
-  bool shouldInlineStylesheet(AssetId id) {
-    // Note: [id.path] is a relative path from the root of a package.
-    // Default is to inline everything
-    if (inlineStylesheets == null) return true;
-    // First check for the full asset path overrides.
-    var override = inlineStylesheets[id.toString()];
-    if (override != null) return override;
-    // Then check just the path overrides (if the package was not specified).
-    override = inlineStylesheets[id.path];
-    if (override != null) return override;
-    // Then check the global default setting.
-    var globalDefault = inlineStylesheets['default'];
-    return (globalDefault != null) ? globalDefault : true;
-  }
-
-  // Whether a stylesheet with [id] has an overriden inlining setting.
-  bool stylesheetInliningIsOverridden(AssetId id) {
-    return inlineStylesheets != null &&
-        (inlineStylesheets.containsKey(id.toString()) ||
-            inlineStylesheets.containsKey(id.path));
-  }
-}
-
-class LintOptions {
-  /// Whether lint is enabled.
-  final bool enabled;
-
-  /// Patterns explicitly included/excluded from linting (if any).
-  final List<RegExp> patterns;
-
-  /// When [patterns] is not null, whether they denote inclusion or exclusion.
-  final bool isInclude;
-
-  const LintOptions()
-      : enabled = true,
-        patterns = null,
-        isInclude = true;
-
-  const LintOptions.disabled()
-      : enabled = false,
-        patterns = null,
-        isInclude = true;
-
-  LintOptions.include(List<String> patterns)
-      : enabled = true,
-        isInclude = true,
-        patterns = patterns.map((s) => new RegExp(s)).toList();
-
-  LintOptions.exclude(List<String> patterns)
-      : enabled = true,
-        isInclude = false,
-        patterns = patterns.map((s) => new RegExp(s)).toList();
-
-  bool shouldLint(String fileName) {
-    if (!enabled) return false;
-    if (patterns == null) return isInclude;
-    for (var pattern in patterns) {
-      if (pattern.hasMatch(fileName)) return isInclude;
-    }
-    return !isInclude;
-  }
-}
-
-/// Mixin for polymer transformers.
-abstract class PolymerTransformer {
-  TransformOptions get options;
-
-  Future<Document> readPrimaryAsHtml(Transform transform, BuildLogger logger) {
-    var asset = transform.primaryInput;
-    var id = asset.id;
-    return asset.readAsString().then((content) {
-      return _parseHtml(content, id.path, logger,
-          checkDocType: options.isHtmlEntryPoint(id));
-    });
-  }
-
-  Future<Document> readAsHtml(
-      AssetId id, Transform transform, BuildLogger logger,
-      {bool showWarnings: true}) {
-    var primaryId = transform.primaryInput.id;
-    bool samePackage = id.package == primaryId.package;
-    var url = spanUrlFor(id, transform, logger);
-    return transform.readInputAsString(id).then((content) {
-      return _parseHtml(content, url, logger,
-          checkDocType: samePackage && options.isHtmlEntryPoint(id),
-          showWarnings: showWarnings);
-    });
-  }
-
-  Future<bool> assetExists(AssetId id, Transform transform) =>
-      transform.getInput(id).then((_) => true).catchError((_) => false);
-
-  String toString() => 'polymer ($runtimeType)';
-}
-
-/// Gets the appropriate URL to use in a span to produce messages (e.g.
-/// warnings) for users. This will attempt to format the URL in the most useful
-/// way:
-///
-/// - If the asset is within the primary package, then use the [id.path],
-///   the user will know it is a file from their own code.
-/// - If the asset is from another package, then use [assetUrlFor], this will
-///   likely be a "package:" url to the file in the other package, which is
-///   enough for users to identify where the error is.
-String spanUrlFor(AssetId id, Transform transform, logger) {
-  var primaryId = transform.primaryInput.id;
-  bool samePackage = id.package == primaryId.package;
-  return samePackage
-      ? id.path
-      : assetUrlFor(id, primaryId, logger, allowAssetUrl: true);
-}
-
-/// Transformer phases which should be applied to the Polymer package.
-List<List<Transformer>> get phasesForPolymer =>
-    [[new ObservableTransformer(files: ['lib/src/instance.dart'])]];
-
-/// Generate the import url for a file described by [id], referenced by a file
-/// with [sourceId].
-// TODO(sigmund): this should also be in barback (dartbug.com/12610)
-String assetUrlFor(AssetId id, AssetId sourceId, BuildLogger logger,
-    {bool allowAssetUrl: false}) {
-  // use package: and asset: urls if possible
-  if (id.path.startsWith('lib/')) {
-    return 'package:${id.package}/${id.path.substring(4)}';
-  }
-
-  if (id.path.startsWith('asset/')) {
-    if (!allowAssetUrl) {
-      logger.error(INTERNAL_ERROR_DONT_KNOW_HOW_TO_IMPORT.create({
-        'target': id,
-        'source': sourceId,
-        'extra': ' (asset urls not allowed.)'
-      }));
-      return null;
-    }
-    return 'asset:${id.package}/${id.path.substring(6)}';
-  }
-
-  // Use relative urls only if it's possible.
-  if (id.package != sourceId.package) {
-    logger.error("don't know how to refer to $id from $sourceId");
-    return null;
-  }
-
-  var builder = path.url;
-  return builder.relative(builder.join('/', id.path),
-      from: builder.join('/', builder.dirname(sourceId.path)));
-}
-
-/// Convert system paths to asset paths (asset paths are posix style).
-String systemToAssetPath(String assetPath) {
-  if (path.Style.platform != path.Style.windows) return assetPath;
-  return path.posix.joinAll(path.split(assetPath));
-}
-
-/// 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);
-}
-
-/// Regex to split names in the 'attributes' attribute, which supports 'a b c',
-/// 'a,b,c', or even 'a b,c'. This is the same as in `lib/src/declaration.dart`.
-final ATTRIBUTES_REGEX = new RegExp(r'\s|,');