Remove barback from the repo.

pkg/barback/lib/src/transformer/transform.dart

Index: pkg/barback/lib/src/transformer/transform.dart
diff --git a/pkg/barback/lib/src/transformer/transform.dart b/pkg/barback/lib/src/transformer/transform.dart
deleted file mode 100644
index 7991a82200d2520933f7f1e4a1b643b8467cb3ed..0000000000000000000000000000000000000000
--- a/pkg/barback/lib/src/transformer/transform.dart
+++ /dev/null
@@ -1,104 +0,0 @@
-// Copyright (c) 2014, 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 barback.transformer.transform;
-
-import 'dart:async';
-import 'dart:convert';
-
-import '../asset/asset.dart';
-import '../asset/asset_id.dart';
-import '../errors.dart';
-import 'aggregate_transform.dart';
-import 'transform_logger.dart';
-
-/// Creates a new [Transform] wrapping an [AggregateTransform].
-///
-/// Although barback internally works in terms of [AggregateTransformer]s, most
-/// transformers only work on individual primary inputs in isolation. We want to
-/// allow those transformers to implement the more user-friendly [Transformer]
-/// interface which takes the more user-friendly [Transform] object. This method
-/// wraps the more general [AggregateTransform] to return a [Transform] instead.
-Future<Transform> newTransform(AggregateTransform aggregate) {
-  // A wrapped [Transformer] will assign each primary input a unique transform
-  // key, so we can safely get the first asset emitted. We don't want to wait
-  // for the stream to close, since that requires barback to prove that no more
-  // new assets will be generated.
-  return aggregate.primaryInputs.first.then((primaryInput) =>
-      new Transform._(aggregate, primaryInput));
-}
-
-/// While a [Transformer] represents a *kind* of transformation, this defines
-/// one specific usage of it on a set of files.
-///
-/// This ephemeral object exists only during an actual transform application to
-/// facilitate communication between the [Transformer] and the code hosting
-/// the transformation. It lets the [Transformer] access inputs and generate
-/// outputs.
-class Transform {
-  /// The underlying aggregate transform.
-  final AggregateTransform _aggregate;
-
-  /// Gets the primary input asset.
-  ///
-  /// While a transformation can use multiple input assets, one must be a
-  /// special "primary" asset. This will be the "entrypoint" or "main" input
-  /// file for a transformation.
-  ///
-  /// For example, with a dart2js transform, the primary input would be the
-  /// entrypoint Dart file. All of the other Dart files that that imports
-  /// would be secondary inputs.
-  final Asset primaryInput;
-
-  /// A logger so that the [Transformer] can report build details.
-  TransformLogger get logger => _aggregate.logger;
-
-  Transform._(this._aggregate, this.primaryInput);
-
-  /// Gets the asset for an input [id].
-  ///
-  /// If an input with [id] cannot be found, throws an [AssetNotFoundException].
-  Future<Asset> getInput(AssetId id) => _aggregate.getInput(id);
-
-  /// A convenience method to the contents of the input with [id] as a string.
-  ///
-  /// This is equivalent to calling [getInput] followed by [Asset.readAsString].
-  ///
-  /// If the asset was created from a [String] the original string is always
-  /// returned and [encoding] is ignored. Otherwise, the binary data of the
-  /// asset is decoded using [encoding], which defaults to [UTF8].
-  ///
-  /// If an input with [id] cannot be found, throws an [AssetNotFoundException].
-  Future<String> readInputAsString(AssetId id, {Encoding encoding}) =>
-      _aggregate.readInputAsString(id, encoding: encoding);
-
-  /// A convenience method to the contents of the input with [id].
-  ///
-  /// This is equivalent to calling [getInput] followed by [Asset.read].
-  ///
-  /// If the asset was created from a [String], this returns its UTF-8 encoding.
-  ///
-  /// If an input with [id] cannot be found, throws an [AssetNotFoundException].
-  Stream<List<int>> readInput(AssetId id) => _aggregate.readInput(id);
-
-  /// A convenience method to return whether or not an asset exists.
-  ///
-  /// This is equivalent to calling [getInput] and catching an
-  /// [AssetNotFoundException].
-  Future<bool> hasInput(AssetId id) => _aggregate.hasInput(id);
-
-  /// Stores [output] as the output created by this transformation.
-  ///
-  /// A transformation can output as many assets as it wants.
-  void addOutput(Asset output) => _aggregate.addOutput(output);
-
-  /// Consume the primary input so that it doesn't get processed by future
-  /// phases or emitted once processing has finished.
-  ///
-  /// Normally the primary input will automatically be forwarded unless the
-  /// transformer overwrites it by emitting an input with the same id. This
-  /// allows the transformer to tell barback not to forward the primary input
-  /// even if it's not overwritten.
-  void consumePrimary() => _aggregate.consumePrimary(primaryInput.id);
-}