Roll Observatory packages and add a roll script

quiver/lib/pattern.dart

-// Copyright 2013 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-/**
- * This library contains utilities for working with [RegExp]s and other
- * [Pattern]s.
- */
-library quiver.pattern;
-
-part 'src/pattern/glob.dart';
-
-// From the PatternCharacter rule here:
-// http://ecma-international.org/ecma-262/5.1/#sec-15.10
-final _specialChars = new RegExp(r'([\\\^\$\.\|\+\[\]\(\)\{\}])');
-
-/**
- * Escapes special regex characters in [str] so that it can be used as a
- * literal match inside of a [RegExp].
- *
- * The special characters are: \ ^ $ . | + [ ] ( ) { }
- * as defined here: http://ecma-international.org/ecma-262/5.1/#sec-15.10
- */
-String escapeRegex(String str) => str.splitMapJoin(_specialChars,
-    onMatch: (Match m) => '\\${m.group(0)}', onNonMatch: (s) => s);
-
-/**
- * Returns a [Pattern] that matches against every pattern in [include] and
- * returns all the matches. If the input string matches against any pattern in
- * [exclude] no matches are returned.
- */
-Pattern matchAny(Iterable<Pattern> include, {Iterable<Pattern> exclude}) =>
-    new _MultiPattern(include, exclude: exclude);
-
-class _MultiPattern extends Pattern {
-  final Iterable<Pattern> include;
-  final Iterable<Pattern> exclude;
-
-  _MultiPattern(Iterable<Pattern> this.include,
-      {Iterable<Pattern> this.exclude});
-
-  Iterable<Match> allMatches(String str, [int start = 0]) {
-    var _allMatches = [];
-    for (var pattern in include) {
-      var matches = pattern.allMatches(str, start);
-      if (_hasMatch(matches)) {
-        if (exclude != null) {
-          for (var excludePattern in exclude) {
-            if (_hasMatch(excludePattern.allMatches(str, start))) {
-              return [];
-            }
-          }
-        }
-        _allMatches.add(matches);
-      }
-    }
-    return _allMatches.expand((x) => x);
-  }
-
-  Match matchAsPrefix(String str, [int start = 0]) {
-    return allMatches(str).firstWhere((match) => match.start == start,
-        orElse: () => null);
-  }
-}
-
-/**
- * Returns true if [pattern] has a single match in [str] that matches the whole
- * string, not a substring.
- */
-bool matchesFull(Pattern pattern, String str) {
-  var match = pattern.matchAsPrefix(str);
-  return match != null && match.end == str.length;
-}
-
-bool _hasMatch(Iterable<Match> matches) => matches.iterator.moveNext();