Roll Observatory packages and add a roll script

analyzer/lib/src/error.dart

-// 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 error;
-
-import 'dart:collection';
-
-import 'generated/error.dart';
-
-/// The maximum line length when printing extracted source code when converting
-/// an [AnalyzerError] to a string.
-final _MAX_ERROR_LINE_LENGTH = 120;
-
-/// A wrapper around [AnalysisError] that provides a more user-friendly string
-/// representation.
-class AnalyzerError implements Exception {
-  final AnalysisError error;
-
-  AnalyzerError(this.error);
-
-  String get message => toString();
-
-  String toString() {
-    var builder = new StringBuffer();
-
-    // Print a less friendly string representation to ensure that
-    // error.source.contents is not executed, as .contents it isn't async
-    builder.write("Error in ${error.source.shortName}: ${error.message}");
-
-//    var content = error.source.contents.data;
-//    var beforeError = content.substring(0, error.offset);
-//    var lineNumber = "\n".allMatches(beforeError).length + 1;
-//    builder.writeln("Error on line $lineNumber of ${error.source.fullName}: "
-//        "${error.message}");
-
-//    var errorLineIndex = beforeError.lastIndexOf("\n") + 1;
-//    var errorEndOfLineIndex = content.indexOf("\n", error.offset);
-//    if (errorEndOfLineIndex == -1) errorEndOfLineIndex = content.length;
-//    var errorLine = content.substring(
-//        errorLineIndex, errorEndOfLineIndex);
-//    var errorColumn = error.offset - errorLineIndex;
-//    var errorLength = error.length;
-//
-//    // Ensure that the error line we display isn't too long.
-//    if (errorLine.length > _MAX_ERROR_LINE_LENGTH) {
-//      var leftLength = errorColumn;
-//      var rightLength = errorLine.length - leftLength;
-//      if (leftLength > _MAX_ERROR_LINE_LENGTH ~/ 2 &&
-//          rightLength > _MAX_ERROR_LINE_LENGTH ~/ 2) {
-//        errorLine = "..." + errorLine.substring(
-//            errorColumn - _MAX_ERROR_LINE_LENGTH ~/ 2 + 3,
-//            errorColumn + _MAX_ERROR_LINE_LENGTH ~/ 2 - 3)
-//            + "...";
-//        errorColumn = _MAX_ERROR_LINE_LENGTH ~/ 2;
-//      } else if (rightLength > _MAX_ERROR_LINE_LENGTH ~/ 2) {
-//        errorLine = errorLine.substring(0, _MAX_ERROR_LINE_LENGTH - 3) + "...";
-//      } else {
-//        assert(leftLength > _MAX_ERROR_LINE_LENGTH ~/ 2);
-//        errorColumn -= errorLine.length - _MAX_ERROR_LINE_LENGTH;
-//        errorLine = "..." + errorLine.substring(
-//            errorLine.length - _MAX_ERROR_LINE_LENGTH + 3, errorLine.length);
-//      }
-//      errorLength = math.min(errorLength, _MAX_ERROR_LINE_LENGTH - errorColumn);
-//    }
-//    builder.writeln(errorLine);
-//
-//    for (var i = 0; i < errorColumn; i++) builder.write(" ");
-//    for (var i = 0; i < errorLength; i++) builder.write("^");
-    builder.writeln();
-
-    return builder.toString();
-  }
-}
-
-/// An error class that collects multiple [AnalyzerError]s that are emitted
-/// during a single analysis.
-class AnalyzerErrorGroup implements Exception {
-  final List<AnalyzerError> _errors;
-  AnalyzerErrorGroup(Iterable<AnalyzerError> errors)
-      : _errors = errors.toList();
-
-  /// Creates an [AnalyzerErrorGroup] from a list of lower-level
-  /// [AnalysisError]s.
-  AnalyzerErrorGroup.fromAnalysisErrors(Iterable<AnalysisError> errors)
-      : this(errors.map((e) => new AnalyzerError(e)));
-
-  /// The errors in this collection.
-  List<AnalyzerError> get errors =>
-      new UnmodifiableListView<AnalyzerError>(_errors);
-
-  String get message => toString();
-  String toString() => errors.join("\n");
-}