Remove code that requires whole-program compile

lib/src/transformer/uri_resolver.dart

-// Copyright (c) 2016, 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 dev_compiler.src.transformer.uri_resolver;
-
-import 'package:analyzer/src/generated/sdk.dart' show DartSdk;
-import 'package:analyzer/src/generated/source.dart' show Source, SourceFactory;
-import 'package:barback/barback.dart' show AssetId;
-import 'package:code_transformers/resolver.dart'
-    show DartUriResolverProxy, DirectoryBasedDartSdkProxy;
-import 'package:cli_util/cli_util.dart' as cli_util;
-import 'package:path/path.dart' as path;
-
-import 'asset_source.dart';
-
-typedef AssetSource AssetSourceGetter(AssetId id);
-
-/// Builds a package URI that corresponds to [id]. This is roughly the inverse
-/// function of [resolveAssetId].
-///
-/// Note that if [id] points to a file outside the package's `lib` folder, that
-/// file must be under `web` and the returned URI will not strictly correspond
-/// to classic package URIs (but it will be invertible by [resolveAssetId]).
-String assetIdToUri(AssetId id) {
-  var p = id.path;
-  if (p.startsWith('lib/web/')) {
-    throw new ArgumentError('Cannot convert $id to an unambiguous package uri');
-  }
-  if (p.startsWith('lib/')) {
-    p = p.substring('lib/'.length);
-  } else if (!p.startsWith('web/')) {
-    throw new ArgumentError('Unexpected path in $id (expected {lib,web}/*');
-  }
-  // Note: if the file is under web/, then we leave it as it is: resolveAssetId
-  // does the inverse transform.
-  return 'package:${id.package}/$p';
-}
-
-/// Gets the [AssetId] that corresponds to [uri].
-///
-/// If [fromAssetId] is not `null` and if [uri] is a relative URI, then
-/// [fromAssetId] will be used to resolve the create a relative URI. In other
-/// cases, this is roughly the inverse function of [assetIdToUri].
-AssetId resolveAssetId(Uri uri, {AssetId fromAssetId}) {
-  if (uri.scheme == 'dart') return null;
-
-  if (uri.scheme == 'package') {
-    var segments = uri.pathSegments.toList();
-    var package = segments[0];
-    if (segments[1] == 'web') {
-      return new AssetId(package, path.url.joinAll(segments.skip(1)));
-    } else {
-      segments[0] = 'lib';
-      return new AssetId(package, path.url.joinAll(segments));
-    }
-  }
-
-  if (uri.scheme == null || uri.scheme == '') {
-    if (fromAssetId == null) {
-      throw new ArgumentError('No asset to resolve relative URI from.');
-    }
-    return new AssetId(fromAssetId.package,
-        path.normalize(path.join(path.dirname(fromAssetId.path), uri.path)));
-  }
-
-  throw new ArgumentError('Unexpected uri: $uri (uri.scheme = ${uri.scheme})');
-}
-
-class _DdcUriResolver extends DartUriResolverProxy {
-  AssetSourceGetter _getAssetSource;
-
-  _DdcUriResolver(DartSdk sdk, this._getAssetSource) : super(sdk);
-
-  @override
-  Source resolveAbsolute(Uri uri, [Uri actualUri]) {
-    return uri.scheme == 'package'
-        ? _getAssetSource(resolveAssetId(uri))
-        : super.resolveAbsolute(uri, actualUri);
-  }
-}
-
-String get dartSdkDirectory => cli_util.getSdkDir()?.path;
-
-SourceFactory createSourceFactory(AssetSourceGetter getAssetSource) {
-  var sdk = new DirectoryBasedDartSdkProxy(dartSdkDirectory);
-  return new SourceFactory([new _DdcUriResolver(sdk, getAssetSource)]);
-}