Support v2 dev sdks, fix deprecated usages

lib/src/dart_sdk.dart

@@ -4,8 +4,6 @@
 
 library code_transformers.src.dart_sdk;
 
-import 'dart:io' show Directory;
-
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/context/context.dart';
 import 'package:analyzer/src/dart/sdk/sdk.dart';
@@ -20,10 +18,7 @@ import 'package:cli_util/cli_util.dart' as cli_util;
 /// This will return null if the SDK cannot be found
 ///
 /// Note that this may not be correct when executing outside of `pub`.
-String get dartSdkDirectory {
-  Directory sdkDir = cli_util.getSdkDir();
-  return sdkDir != null ? sdkDir.path : null;
-}
+String get dartSdkDirectory => cli_util.getSdkPath();
 
 /// Sources that are annotated with a source uri, so it is easy to resolve how
 /// to support `Resolver.getImportUri`.

lib/src/messages.dart

@@ -10,8 +10,7 @@ import 'package:code_transformers/messages/messages.dart';
 const NO_ABSOLUTE_PATHS = const MessageTemplate(
     const MessageId('code_transformers', 1),
     'absolute paths not allowed: "%-url-%"',
-    'Absolute paths not allowed',
-    '''
+    'Absolute paths not allowed', '''
 The transformers processing your code were trying to resolve a URL and identify
 a file that they correspond to. Currently only relative paths can be resolved.
 ''');
@@ -55,8 +54,7 @@ See [issue 15797](http://dartbug.com/15797) and
 const UNSPECIFIED_FROM_IN_NON_LIB_ASSET = const MessageTemplate(
     const MessageId('code_transformers', 4),
     'Cannot create URI for %-id-% without specifying where to import it from.',
-    'Missing `from` argument.',
-    '''
+    'Missing `from` argument.', '''
 Assets outside of the lib folder can only be imported via relative URIs. Use
 the `from` argument in `assetIdToUri` to specify the location in the same
 package where you intend to import this asset from.
@@ -65,8 +63,7 @@ package where you intend to import this asset from.
 const IMPORT_FROM_DIFFERENT_PACKAGE = const MessageTemplate(
     const MessageId('code_transformers', 5),
     'Not possible to import %-toId-% from %-fromId-%',
-    'Cannot import asset.',
-    '''
+    'Cannot import asset.', '''
 Assets outside of the lib folder can only be imported via relative URIs from
 assets in the same package. To import an asset from another package, you need to
 move it into the lib folder of your package.

lib/src/resolver_impl.dart

@@ -310,7 +310,8 @@ class ResolverImpl implements Resolver {
 
     var importUri = _getSourceUri(element);
     var spanPath = importUri != null ? importUri.toString() : assetId.path;
-    return new SourceFile(sources[assetId].rawContents, url: spanPath);
+    return new SourceFile.fromString(sources[assetId].rawContents,
+        url: spanPath);
   }
 }
 
@@ -435,7 +436,8 @@ class AssetBasedSource extends Source {
   SourceFile _getSourceFile([String contents]) {
     var uri = assetIdToUri(assetId);
     var path = uri != null ? uri : assetId.path;
-    return new SourceFile(contents != null ? contents : rawContents, url: path);
+    return new SourceFile.fromString(contents != null ? contents : rawContents,
+        url: path);
   }
 }
 

pubspec.yaml

@@ -1,17 +1,17 @@
 name: code_transformers
-version: 0.5.1+3
+version: 0.5.2-dev
 author: Dart Team <misc@dartlang.org>
 description: Collection of utilities related to creating barback transformers.
 homepage: https://github.com/dart-lang/code-transformers
 environment:
-  sdk: '>=1.0.0 <2.0.0'
+  sdk: '>=1.0.0 <2.0.0-dev.infinity'
 dependencies:
   analyzer: '>=0.28.0 <0.31.0'
   barback: '>=0.14.2 <0.16.0'
-  cli_util: '>=0.0.1 <0.2.0'
+  cli_util: '>=0.1.0 <0.2.0'
   path: '>=0.9.0 <2.0.0'
   source_maps: '>=0.9.4 <0.11.0'
-  source_span: '>=1.0.0 <2.0.0'
+  source_span: '>=1.4.0 <2.0.0'
 dev_dependencies:
   test: '>=0.12.1 <0.13.0'
   transformer_test: '>=0.1.0 <0.3.0'