refactor(dart/transform): Improve logging

Ensure that, where possible, log messages include an [AssetId].

Closes #5369

modules_dart/transform/lib/src/transform/common/code/reflection_info_code.dart

@@ -56,8 +56,10 @@ class ReflectionInfoVisitor extends RecursiveAstVisitor<ReflectionInfoModel> {
     if (numCtorsFound > 1) {
       var ctorName = ctor.name;
       if (ctorName != null) {
-        log.warning('Found ${numCtorsFound} constructors for class '
-            '${node.name}; using constructor ${ctorName}.');
+        log.warning(
+            'Found ${numCtorsFound} constructors for class '
+            '${node.name}; using constructor ${ctorName}.',
+            asset: assetId);
       }
     }
     return ctor;
@@ -166,8 +168,10 @@ class ReflectionInfoVisitor extends RecursiveAstVisitor<ReflectionInfoModel> {
     if (directivesNode == null) return const [];
 
     if (directivesNode.expression is! ListLiteral) {
-      log.warning('Angular 2 expects a list literal for `directives` '
-          'but found a ${directivesNode.expression.runtimeType}');
+      log.warning(
+          'Angular 2 expects a list literal for `directives` '
+          'but found a ${directivesNode.expression.runtimeType}',
+          asset: assetId);
       return const [];
     }
     final directives = <PrefixedDirective>[];
@@ -179,7 +183,8 @@ class ReflectionInfoVisitor extends RecursiveAstVisitor<ReflectionInfoModel> {
       } else if (dep is Identifier) {
         directives.add(new PrefixedDirective()..name = '${dep}');
       } else {
-        log.warning('Found unexpected value $dep in `directives`.');
+        log.warning('Found unexpected value $dep in `directives`.',
+            asset: assetId);
       }
     }
     return directives;

modules_dart/transform/lib/src/transform/deferred_rewriter/rewriter.dart

@@ -114,12 +114,13 @@ class _FindDeferredLibraries extends Object with RecursiveAstVisitor<Object> {
 
   bool hasDeferredLibrariesToRewrite() {
     if (deferredImports.isEmpty) {
-      log.fine('There are no deferred library imports.');
+      log.fine('There are no deferred library imports.', asset: _entryPoint);
       return false;
     }
     if (loadLibraryInvocations.isEmpty) {
       log.fine(
-          'There are no loadLibrary invocations that need to be rewritten.');
+          'There are no loadLibrary invocations that need to be rewritten.',
+          asset: _entryPoint);
       return false;
     }
     return true;

modules_dart/transform/lib/src/transform/directive_metadata_linker/ng_deps_linker.dart

@@ -72,9 +72,11 @@ Future<Map<String, String>> _processNgImports(NgDepsModel model,
         retVal[directive.uri] = summaryJsonUri;
       }
     }, onError: (err, stack) {
-      log.warning('Error while looking for $summaryJsonUri. '
+      log.warning(
+          'Error while looking for $summaryJsonUri. '
           'Message: $err\n'
-          'Stack: $stack');
+          'Stack: $stack',
+          asset: assetId);
     });
   }))
       .then((_) => retVal);

modules_dart/transform/lib/src/transform/directive_metadata_linker/ng_meta_linker.dart

@@ -77,7 +77,7 @@ Future _linkRecursive(NgMeta ngMeta, AssetReader reader, AssetId assetId,
       }
     } catch (err, st) {
       // Log and continue.
-      log.warning('Failed to fetch $uri. Message: $err.\n$st');
+      log.warning('Failed to fetch $uri. Message: $err.\n$st', asset: assetId);
     }
   }));
 }

modules_dart/transform/lib/src/transform/directive_processor/rewriter.dart

@@ -96,7 +96,7 @@ class _NgMetaVisitor extends Object with SimpleAstVisitor<Object> {
             compileDirectiveMetadata;
       }
     }).catchError((err) {
-      log.error('ERROR: $err');
+      log.error('ERROR: $err', asset: assetId);
     }));
     return null;
   }

modules_dart/transform/lib/src/transform/inliner_for_test/transformer.dart

@@ -179,7 +179,7 @@ class _ViewPropInliner extends RecursiveAstVisitor<Object> {
         final inlinedVal = _addInlineValue(url, varBase: _inlinedStyleBase);
         _writer.print('${inlinedVal.name},');
       } else {
-        zone.log.warning('style url is not a String (${url})');
+        zone.log.warning('style url is not a String (${url})', asset: _assetId);
       }
     }
     _writer.print(']');
@@ -191,7 +191,8 @@ class _ViewPropInliner extends RecursiveAstVisitor<Object> {
   void _populateTemplateUrl(NamedExpression node) {
     var url = naiveEval(node.expression);
     if (url is! String) {
-      zone.log.warning('template url is not a String (${node.expression})');
+      zone.log.warning('template url is not a String (${node.expression})',
+          asset: _assetId);
       return;
     }
     _writer.print(_code.substring(_lastIndex, node.offset));
@@ -209,7 +210,7 @@ class _ViewPropInliner extends RecursiveAstVisitor<Object> {
     final resolvedUri = _urlResolver.resolve(_baseUri.toString(), url);
 
     return _xhr.get(resolvedUri).catchError((_) {
-      zone.log.error('$_baseUri: could not read $url');
+      zone.log.error('$_baseUri: could not read $url', asset: _assetId);
       return '';
     });
   }

modules_dart/transform/lib/src/transform/reflection_remover/transformer.dart

@@ -44,9 +44,11 @@ class ReflectionRemover extends Transformer implements LazyTransformer {
       if (options.modeName == TRANSFORM_DYNAMIC_MODE) {
         mirrorMode = MirrorMode.debug;
         writeStaticInit = false;
-        zone.log.info('Running in "${options.modeName}", '
+        zone.log.info(
+            'Running in "${options.modeName}", '
             'mirrorMode: ${mirrorMode}, '
-            'writeStaticInit: ${writeStaticInit}.');
+            'writeStaticInit: ${writeStaticInit}.',
+            asset: primaryId);
       }
 
       var transformedCode = await removeReflectionCapabilities(

modules_dart/transform/lib/src/transform/template_compiler/compile_data_creator.dart

@@ -19,8 +19,8 @@ import 'package:barback/barback.dart';
 ///
 /// The returned value wraps the [NgDepsModel] at `assetId` as well as these
 /// created objects.
-Future<CompileDataResults> createCompileData(
-    AssetReader reader, AssetId assetId, List<String> platformDirectives) async {
+Future<CompileDataResults> createCompileData(AssetReader reader,
+    AssetId assetId, List<String> platformDirectives) async {
   return logElapsedAsync(() async {
     final creator =
         await _CompileDataCreator.create(reader, assetId, platformDirectives);
@@ -92,10 +92,12 @@ class _CompileDataCreator {
             } else if (depNgMeta.aliases.containsKey(dep.name)) {
               compileDatum.directives.addAll(depNgMeta.flatten(dep.name));
             } else {
-              log.warning('Could not find Directive entry for $dep. '
+              log.warning(
+                  'Could not find Directive entry for $dep. '
                   'Please be aware that Dart transformers have limited support for '
                   'reusable, pre-defined lists of Directives (aka '
-                  '"directive aliases"). See https://goo.gl/d8XPt0 for details.');
+                  '"directive aliases"). See https://goo.gl/d8XPt0 for details.',
+                  asset: entryPoint);
             }
           }
           compileData[reflectable] = compileDatum;
@@ -112,8 +114,10 @@ class _CompileDataCreator {
     for (var ad in platformDirectives) {
       final parts = ad.split("#");
       if (parts.length != 2) {
-        log.warning('The platform directives configuration option '
-            'must be in the following format: "URI#TOKEN"');
+        log.warning(
+            'The platform directives configuration option '
+            'must be in the following format: "URI#TOKEN"',
+            asset: entryPoint);
         return const [];
       }
       res.addAll(await _readPlatformDirectivesFromUri(parts[0], parts[1]));