Index: pkg/polymer/lib/src/build/index_page_builder.dart |
diff --git a/pkg/polymer/lib/src/build/index_page_builder.dart b/pkg/polymer/lib/src/build/index_page_builder.dart |
new file mode 100644 |
index 0000000000000000000000000000000000000000..2543a1e0b40e14f775a667dc97cb418dd40ccb95 |
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+++ b/pkg/polymer/lib/src/build/index_page_builder.dart |
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+// 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. |
+ |
+/// Builds an index.html file in each folder containing entry points, if none |
+/// already exists. This file simply lists all the entry point files. |
+library polymer.src.build.index_page_builder; |
+ |
+import 'dart:async'; |
+import 'dart:math'; |
+ |
+import 'package:barback/barback.dart'; |
+import 'package:path/path.dart' as path; |
+ |
+import 'common.dart'; |
+ |
+/// Builds an index.html file in each folder containing entry points, if none |
+/// already exists. This file simply lists all the entry point files. |
+class IndexPageBuilder extends AggregateTransformer { |
+ final TransformOptions options; |
+ |
+ IndexPageBuilder(this.options); |
+ |
+ classifyPrimary(AssetId id) { |
+ if (!options.isHtmlEntryPoint(id)) return null; |
+ // Group all entry points together. |
+ return 'all_entry_points'; |
+ } |
+ |
+ Future apply(AggregateTransform transform) { |
+ Map<String, List<String>> dirFilesMap = {}; |
+ |
+ return transform.primaryInputs.toList().then((assets) { |
+ // Add the asset to its directory, and make sure its directory is included |
+ // in all its parents. |
+ for (var asset in assets) { |
+ var dir = path.url.dirname(asset.id.path); |
+ while (dir != '.') { |
+ dirFilesMap.putIfAbsent(dir, () => []); |
+ |
+ var relativePath = path.url.relative(asset.id.path, from: dir); |
+ var relativeDir = path.url.dirname(relativePath); |
+ dirFilesMap[dir].add(relativePath); |
+ dir = path.url.dirname(dir); |
+ } |
+ } |
+ |
+ // Create an output index.html file for each directory, if one doesn't |
+ // exist already |
+ var futures = []; |
+ dirFilesMap.forEach((directory, files) { |
+ futures.add(_createOutput(directory, files, transform)); |
+ }); |
+ return Future.wait(futures); |
+ }); |
+ } |
+ |
+ Future _createOutput( |
+ String directory, List<String> files, AggregateTransform transform) { |
+ var indexAsset = new AssetId( |
+ transform.package, path.join(directory, 'index.html')); |
+ |
+ return transform.hasInput(indexAsset).then((exists) { |
+ // Don't overwrite existing outputs! |
+ if (exists) return; |
+ |
+ // Sort alphabetically by recursive path parts. |
+ files.sort((String a, String b) { |
+ var aParts = path.split(a); |
+ var bParts = path.split(b); |
+ int diff = 0; |
+ int minLength = min(aParts.length, bParts.length); |
+ for (int i = 0; i < minLength; i++) { |
+ // Directories are sorted below files. |
+ var aIsDir = i < aParts.length - 1; |
+ var bIsDir = i < bParts.length - 1; |
+ if (aIsDir && !bIsDir) return 1; |
+ if (!aIsDir && bIsDir) return -1; |
+ |
+ // Raw string comparison, if not identical we return. |
+ diff = aParts[i].compareTo(bParts[i]); |
+ if (diff != 0) return diff; |
+ } |
+ // Identical files, shouldn't happen in practice. |
+ return 0; |
+ }); |
+ |
+ // Create the document with a list. |
+ var doc = new StringBuffer( |
+ '<!DOCTYPE html><html><body><h1>Entry points</h1><ul>'); |
+ |
+ // Add all the assets to the list. |
+ for (var file in files) { |
+ doc.write('<li><a href="$file">$file</a></li>'); |
+ }; |
+ |
+ doc.write('</ul></body></html>'); |
+ |
+ // Output the index.html file |
+ transform.addOutput(new Asset.fromString(indexAsset , doc.toString())); |
+ }); |
+ } |
+ |
+} |