Roll Observatory packages and add a roll script

glob/lib/src/utils.dart

-// Copyright (c) 2014, 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 glob.utils;
-
-import 'package:path/path.dart' as p;
-
-/// A range from [min] to [max], inclusive.
-class Range {
-  /// The minimum value included by the range.
-  final int min;
-
-  /// The maximum value included by the range.
-  final int max;
-
-  /// Whether this range covers only a single number.
-  bool get isSingleton => min == max;
-
-  Range(this.min, this.max);
-
-  /// Returns a range that covers only [value].
-  Range.singleton(int value)
-      : this(value, value);
-
-  /// Whether [this] contains [value].
-  bool contains(int value) => value >= min && value <= max;
-
-  bool operator==(Object other) => other is Range &&
-      other.min == min && other.max == max;
-
-  int get hashCode => 3 * min + 7 * max;
-}
-
-/// An implementation of [Match] constructed by [Glob]s.
-class GlobMatch implements Match {
-  final String input;
-  final Pattern pattern;
-  final int start = 0;
-
-  int get end => input.length;
-  int get groupCount => 0;
-
-  GlobMatch(this.input, this.pattern);
-
-  String operator [](int group) => this.group(group);
-
-  String group(int group) {
-    if (group != 0) throw new RangeError.range(group, 0, 0);
-    return input;
-  }
-
-  List<String> groups(List<int> groupIndices) =>
-      groupIndices.map((index) => group(index)).toList();
-}
-
-final _quote = new RegExp(r"[+*?{}|[\]\\().^$-]");
-
-/// Returns [contents] with characters that are meaningful in regular
-/// expressions backslash-escaped.
-String regExpQuote(String contents) =>
-    contents.replaceAllMapped(_quote, (char) => "\\${char[0]}");
-
-/// Returns [path] with all its separators replaced with forward slashes.
-///
-/// This is useful when converting from Windows paths to globs.
-String separatorToForwardSlash(String path) {
-  if (p.style != p.Style.windows) return path;
-  return path.replaceAll('\\', '/');
-}
-
-/// Returns [path] which follows [context] converted to the POSIX format that
-/// globs match against.
-String toPosixPath(p.Context context, String path) {
-  if (context.style == p.Style.windows) return path.replaceAll('\\', '/');
-  if (context.style == p.Style.url) return Uri.decodeFull(path);
-  return path;
-}