Run pub tests against older versions of barback.

third_party/pkg/barback-0.13.0/lib/src/base_transform.dart

 // 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.base_transform;
+library barback.base_transform;
 
 import 'dart:async';
 
-import '../asset/asset_id.dart';
-import '../graph/transform_node.dart';
-import '../log.dart';
+import 'log.dart';
 import 'transform_logger.dart';
+import 'transform_node.dart';
 
 /// The base class for the ephemeral transform objects that are passed to
 /// transformers.
 ///
 /// This class provides the transformers with inputs, but its up to the
 /// subclasses to provide a means of emitting outputs.
 abstract class BaseTransform {
   final TransformNode _node;
 
-  /// The ids of primary inputs that should be consumed.
+  /// Whether the primary input should be consumed.
   ///
-  /// This is exposed by [BaseTransformController].
-  final _consumedPrimaries = new Set<AssetId>();
+  /// This is exposed via [BaseTransformController].
+  bool _consumePrimary = false;
 
   /// Whether the transformer logged an error.
   ///
   /// This is exposed via [BaseTransformController].
   bool _loggedError = false;
 
   /// The controller for the stream of log entries emitted by the transformer.
   ///
   /// This is exposed via [BaseTransformController].
   ///
   /// This is synchronous because error logs can cause the transform to fail, so
   /// we need to ensure that their processing isn't delayed until after the
   /// transform or build has finished.
   final _onLogController = new StreamController<LogEntry>.broadcast(sync: true);
 
   /// A logger so that the [Transformer] can report build details.
   TransformLogger get logger => _logger;
   TransformLogger _logger;
 
   BaseTransform(this._node) {
     _logger = new TransformLogger((asset, level, message, span) {
       if (level == LogLevel.ERROR) _loggedError = true;
 
       // If the log isn't already associated with an asset, use the primary.
-      if (asset == null) asset = _node.info.primaryId;
+      if (asset == null) asset = _node.primary.id;
       var entry = new LogEntry(_node.info, asset, level, message, span);
       _onLogController.add(entry);
     });
   }
 
-  /// Consume a primary input so that it doesn't get processed by future
+  /// Consume the primary input so that it doesn't get processed by future
   /// phases or emitted once processing has finished.
   ///
-  /// Normally each primary input will automatically be forwarded unless the
+  /// 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 a primary input
+  /// allows the transformer to tell barback not to forward the primary input
   /// even if it's not overwritten.
-  void consumePrimary(AssetId id) {
-    // TODO(nweiz): throw an error if an id is consumed that wasn't listed as a
-    // primary input.
-    _consumedPrimaries.add(id);
+  void consumePrimary() {
+    _consumePrimary = true;
   }
 }
 
 /// The base class for controllers of subclasses of [BaseTransform].
 ///
 /// Controllers are used so that [TransformNode]s can get values from a
 /// [BaseTransform] without exposing getters in the public API.
 abstract class BaseTransformController {
   /// The [BaseTransform] controlled by this controller.
   final BaseTransform transform;
 
-  /// The ids of primary inputs that should be consumed.
-  Set<AssetId> get consumedPrimaries => transform._consumedPrimaries;
+  /// Whether the primary input should be consumed.
+  bool get consumePrimary => transform._consumePrimary;
 
   /// Whether the transform logged an error.
   bool get loggedError => transform._loggedError;
 
   /// The stream of log entries emitted by the transformer during a run.
   Stream<LogEntry> get onLog => transform._onLogController.stream;
 
-  /// Whether the transform's input or id stream has been closed.
-  ///
-  /// See also [done].
-  bool get isDone;
-
   BaseTransformController(this.transform);
 
-  /// Mark this transform as finished emitting new inputs or input ids.
-  ///
-  /// This is distinct from [cancel] in that it *doesn't* indicate that the
-  /// transform is finished being used entirely. The transformer may still log
-  /// messages and load secondary inputs. This just indicates that all the
-  /// primary inputs are accounted for.
-  void done();
-
-  /// Mark this transform as canceled.
+  /// Notifies the [BaseTransform] that the transformation has finished being
+  /// applied.
   ///
   /// This will close any streams and release any resources that were allocated
-  /// for the duration of the transformation. Unlike [done], this indicates that
-  /// the transformation is no longer relevant; either it has returned, or
-  /// something external has preemptively invalidated its results.
-  void cancel() {
-    done();
+  /// for the duration of the transformation.
+  void close() {
     transform._onLogController.close();
   }
 }