Start pulling pub from its own repo.

sdk/lib/_internal/pub/lib/src/barback/pub_package_provider.dart

Index: sdk/lib/_internal/pub/lib/src/barback/pub_package_provider.dart
diff --git a/sdk/lib/_internal/pub/lib/src/barback/pub_package_provider.dart b/sdk/lib/_internal/pub/lib/src/barback/pub_package_provider.dart
deleted file mode 100644
index 5e77cb3c3889f4fac16c77ff463fa22d2311c5ca..0000000000000000000000000000000000000000
--- a/sdk/lib/_internal/pub/lib/src/barback/pub_package_provider.dart
+++ /dev/null
@@ -1,119 +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.
-
-library pub.pub_package_provider;
-
-import 'dart:async';
-
-import 'package:barback/barback.dart';
-import 'package:path/path.dart' as path;
-
-import '../io.dart';
-import '../package_graph.dart';
-import '../preprocess.dart';
-import '../sdk.dart' as sdk;
-import '../utils.dart';
-
-/// An implementation of barback's [PackageProvider] interface so that barback
-/// can find assets within pub packages.
-class PubPackageProvider implements StaticPackageProvider {
-  final PackageGraph _graph;
-  final List<String> staticPackages;
-
-  Iterable<String> get packages =>
-      _graph.packages.keys.toSet().difference(staticPackages.toSet());
-
-  PubPackageProvider(PackageGraph graph)
-      : _graph = graph,
-        staticPackages = [r"$pub", r"$sdk"]..addAll(
-            graph.packages.keys.where(graph.isPackageStatic));
-
-  Future<Asset> getAsset(AssetId id) async {
-    // "$pub" is a psuedo-package that allows pub's transformer-loading
-    // infrastructure to share code with pub proper.
-    if (id.package == r'$pub') {
-      var components = path.url.split(id.path);
-      assert(components.isNotEmpty);
-      assert(components.first == 'lib');
-      components[0] = 'dart';
-      var file = assetPath(path.joinAll(components));
-      _assertExists(file, id);
-
-      // Barback may not be in the package graph if there are no user-defined
-      // transformers being used at all. The "$pub" sources are still provided,
-      // but will never be loaded.
-      if (!_graph.packages.containsKey("barback")) {
-        return new Asset.fromPath(id, file);
-      }
-
-      var versions = mapMap(_graph.packages,
-          value: (_, package) => package.version);
-      var contents = readTextFile(file);
-      contents = preprocess(contents, versions, path.toUri(file));
-      return new Asset.fromString(id, contents);
-    }
-
-    // "$sdk" is a pseudo-package that provides access to the Dart library
-    // sources in the SDK. The dart2js transformer uses this to locate the Dart
-    // sources for "dart:" libraries.
-    if (id.package == r'$sdk') {
-      // The asset path contains two "lib" entries. The first represent's pub's
-      // concept that all public assets are in "lib". The second comes from the
-      // organization of the SDK itself. Strip off the first. Leave the second
-      // since dart2js adds it and expects it to be there.
-      var parts = path.split(path.fromUri(id.path));
-      assert(parts.isNotEmpty && parts[0] == 'lib');
-      parts = parts.skip(1);
-
-      var file = path.join(sdk.rootDirectory, path.joinAll(parts));
-      _assertExists(file, id);
-      return new Asset.fromPath(id, file);
-    }
-
-    var nativePath = path.fromUri(id.path);
-    var file = _graph.packages[id.package].path(nativePath);
-    _assertExists(file, id);
-    return new Asset.fromPath(id, file);
-  }
-
-  /// Throw an [AssetNotFoundException] for [id] if [path] doesn't exist.
-  void _assertExists(String path, AssetId id) {
-    if (!fileExists(path)) throw new AssetNotFoundException(id);
-  }
-
-  Stream<AssetId> getAllAssetIds(String packageName) {
-    if (packageName == r'$pub') {
-      // "$pub" is a pseudo-package that allows pub's transformer-loading
-      // infrastructure to share code with pub proper. We provide it only during
-      // the initial transformer loading process.
-      var dartPath = assetPath('dart');
-      return new Stream.fromIterable(listDir(dartPath, recursive: true)
-          // Don't include directories.
-          .where((file) => path.extension(file) == ".dart")
-          .map((library) {
-        var idPath = path.join('lib', path.relative(library, from: dartPath));
-        return new AssetId('\$pub', path.toUri(idPath).toString());
-      }));
-    } else if (packageName == r'$sdk') {
-      // "$sdk" is a pseudo-package that allows the dart2js transformer to find
-      // the Dart core libraries without hitting the file system directly. This
-      // ensures they work with source maps.
-      var libPath = path.join(sdk.rootDirectory, "lib");
-      return new Stream.fromIterable(listDir(libPath, recursive: true)
-          .where((file) => path.extension(file) == ".dart")
-          .map((file) {
-        var idPath = path.join("lib",
-            path.relative(file, from: sdk.rootDirectory));
-        return new AssetId('\$sdk', path.toUri(idPath).toString());
-      }));
-    } else {
-      var package = _graph.packages[packageName];
-      return new Stream.fromIterable(
-          package.listFiles(beneath: 'lib').map((file) {
-        return new AssetId(packageName,
-            path.toUri(package.relative(file)).toString());
-      }));
-    }
-  }
-}