fixes #25, most analyzer errors were not computed

It helps to call computeErrors ;)

R=vsm@google.com

Review URL: https://codereview.chromium.org/1183733004.

pkg/dev_compiler/lib/devc.dart

@@ -9,7 +9,8 @@ import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
-import 'package:analyzer/src/generated/error.dart' as analyzer;
+import 'package:analyzer/src/generated/error.dart'
+    show AnalysisError, ErrorSeverity, ErrorType;
 import 'package:analyzer/src/generated/engine.dart'
     show AnalysisContext, ChangeSet;
 import 'package:analyzer/src/generated/source.dart' show Source;
@@ -27,7 +28,7 @@ import 'src/codegen/html_codegen.dart';
 import 'src/codegen/js_codegen.dart';
 import 'src/dependency_graph.dart';
 import 'src/info.dart'
-    show AnalyzerError, CheckerResults, LibraryInfo, LibraryUnit;
+    show AnalyzerMessage, CheckerResults, LibraryInfo, LibraryUnit;
 import 'src/options.dart';
 import 'src/report.dart';
 import 'src/utils.dart';
@@ -201,11 +202,21 @@ class Compiler implements AbstractCompiler {
   /// Log any errors encountered when resolving [source] and return whether any
   /// errors were found.
   bool logErrors(Source source) {
-    List<analyzer.AnalysisError> errors = context.getErrors(source).errors;
+    context.computeErrors(source);
+    List<AnalysisError> errors = context.getErrors(source).errors;
     bool failure = false;
     if (errors.isNotEmpty) {
       for (var error in errors) {
-        var message = new AnalyzerError.from(error);
+        // Always skip TODOs.
+        if (error.errorCode.type == ErrorType.TODO) continue;
+
+        // Skip hints for now. In the future these could be turned on via flags.
+        if (error.errorCode.errorSeverity.ordinal <
+            ErrorSeverity.WARNING.ordinal) {
+          continue;
+        }
+
+        var message = new AnalyzerMessage.from(error);
         if (message.level == Level.SEVERE) failure = true;
         _reporter.log(message);
       }

pkg/dev_compiler/lib/src/info.dart

@@ -8,7 +8,8 @@ library dev_compiler.src.info;
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
-import 'package:analyzer/src/generated/error.dart' as analyzer;
+import 'package:analyzer/src/generated/error.dart'
+    show AnalysisError, ErrorSeverity;
 import 'package:logging/logging.dart' show Level;
 
 import 'package:dev_compiler/src/checker/rules.dart';
@@ -528,16 +529,16 @@ class InvalidSuperInvocation extends StaticError {
       "(see http://goo.gl/q1T4BB): $node";
 }
 
-class AnalyzerError extends Message {
-  factory AnalyzerError.from(analyzer.AnalysisError error) {
+class AnalyzerMessage extends Message {
+  factory AnalyzerMessage.from(AnalysisError error) {
     var severity = error.errorCode.type.severity;
-    var isError = severity == analyzer.ErrorSeverity.WARNING;
+    var isError = severity == ErrorSeverity.WARNING;
     var level = isError ? Level.SEVERE : Level.WARNING;
     int begin = error.offset;
     int end = begin + error.length;
-    return new AnalyzerError(error.message, level, begin, end);
+    return new AnalyzerMessage(error.message, level, begin, end);
   }
 
-  const AnalyzerError(String message, Level level, int begin, int end)
+  const AnalyzerMessage(String message, Level level, int begin, int end)
       : super(message, level, begin, end);
 }

pkg/dev_compiler/test/codegen/expect/temps.txt

@@ -1 +1,4 @@
 // Messages from compiling temps.dart
+warning: line 16, column 22 of test/codegen/temps.dart: [AnalyzerMessage] Named optional parameters cannot start with an underscore
+  OptionalArg.named({this._opt: 456});
+                     ^^^^^^^^^

pkg/dev_compiler/test/report_test.dart

@@ -46,9 +46,11 @@ void main() {
 
     _verifySummary(GlobalSummary summary) {
       var mainLib = summary.loose['file:///main.dart'];
-      expect(mainLib.messages.length, 1);
+      expect(mainLib.messages.length, 2);
+      var analyzerMsg = mainLib.messages[0];
+      expect(analyzerMsg.kind, "AnalyzerMessage");
 
-      var mainMessage = mainLib.messages[0];
+      var mainMessage = mainLib.messages[1];
       expect(mainMessage.kind, "StaticTypeError");
       expect(mainMessage.level, "severe");
       expect(mainMessage.span.text, '"hi"');