Add a caseSensitive flag to new Glob().

lib/src/parser.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.single_component;
 
 import 'package:path/path.dart' as p;
 import 'package:string_scanner/string_scanner.dart';
 
 import 'ast.dart';
 import 'utils.dart';
 
 const _HYPHEN = 0x2D;
 const _SLASH = 0x2F;
 
 /// A parser for globs.
 class Parser {
   /// The scanner used to scan the source.
   final StringScanner _scanner;
 
   /// The path context for the glob.
   final p.Context _context;
 
-  Parser(String component, this._context)
-      : _scanner = new StringScanner(component);
+  /// Whether this glob is case-sensitive.
+  final bool _caseSensitive;
+
+  Parser(String component, this._context, {bool caseSensitive: true})
+      : _scanner = new StringScanner(component),
+        _caseSensitive = caseSensitive;
 
   /// Parses an entire glob.
   SequenceNode parse() => _parseSequence();
 
   /// Parses a [SequenceNode].
   ///
   /// If [inOptions] is true, this is parsing within an [OptionsNode].
   SequenceNode _parseSequence({bool inOptions: false}) {
     var nodes = [];
 
     if (_scanner.isDone) {
       _scanner.error('expected a glob.', position: 0, length: 0);
     }
 
     while (!_scanner.isDone) {
       if (inOptions && (_scanner.matches(',') || _scanner.matches('}'))) break;
       nodes.add(_parseNode(inOptions: inOptions));
     }
 
-    return new SequenceNode(nodes);
+    return new SequenceNode(nodes, caseSensitive: _caseSensitive);
   }
 
   /// Parses an [AstNode].
   ///
   /// If [inOptions] is true, this is parsing within an [OptionsNode].
   AstNode _parseNode({bool inOptions: false}) {
     var star = _parseStar();
     if (star != null) return star;
 
     var anyChar = _parseAnyChar();
     if (anyChar != null) return anyChar;
 
     var range = _parseRange();
     if (range != null) return range;
 
     var options = _parseOptions();
     if (options != null) return options;
 
     return _parseLiteral(inOptions: inOptions);
   }
 
   /// Tries to parse a [StarNode] or a [DoubleStarNode].
   ///
   /// Returns `null` if there's not one to parse.
   AstNode _parseStar() {
     if (!_scanner.scan('*')) return null;
-    return _scanner.scan('*') ? new DoubleStarNode(_context) : new StarNode();
+    return _scanner.scan('*')
+        ? new DoubleStarNode(_context, caseSensitive: _caseSensitive)
+        : new StarNode(caseSensitive: _caseSensitive);
   }
 
   /// Tries to parse an [AnyCharNode].
   ///
   /// Returns `null` if there's not one to parse.
   AstNode _parseAnyChar() {
     if (!_scanner.scan('?')) return null;
-    return new AnyCharNode();
+    return new AnyCharNode(caseSensitive: _caseSensitive);
   }
 
   /// Tries to parse an [RangeNode].
   ///
   /// Returns `null` if there's not one to parse.
   AstNode _parseRange() {
     if (!_scanner.scan('[')) return null;
     if (_scanner.matches(']')) _scanner.error('unexpected "]".');
     var negated = _scanner.scan('!') || _scanner.scan('^');
 
@@ skipping 27 matching lines @@
           _scanner.error("Range out of order.",
               position: start,
               length: _scanner.position - start);
         }
         ranges.add(new Range(char, end));
       } else {
         ranges.add(new Range.singleton(char));
       }
     }
 
-    return new RangeNode(ranges, negated: negated);
+    return new RangeNode(ranges,
+        negated: negated, caseSensitive: _caseSensitive);
   }
 
   /// Tries to parse an [OptionsNode].
   ///
   /// Returns `null` if there's not one to parse.
   AstNode _parseOptions() {
     if (!_scanner.scan('{')) return null;
     if (_scanner.matches('}')) _scanner.error('unexpected "}".');
 
     var options = [];
     do {
       options.add(_parseSequence(inOptions: true));
     } while (_scanner.scan(','));
 
     // Don't allow single-option blocks.
     if (options.length == 1) _scanner.expect(',');
     _scanner.expect('}');
 
-    return new OptionsNode(options);
+    return new OptionsNode(options, caseSensitive: _caseSensitive);
   }
 
   /// Parses a [LiteralNode].
   AstNode _parseLiteral({bool inOptions: false}) {
     // If we're in an options block, we want to stop parsing as soon as we hit a
     // comma. Otherwise, commas are fair game for literals.
     var regExp = new RegExp(
         inOptions ? r'[^*{[?\\}\],()]*' : r'[^*{[?\\}\]()]*');
 
     _scanner.scan(regExp);
     var buffer = new StringBuffer()..write(_scanner.lastMatch[0]);
 
     while (_scanner.scan('\\')) {
       buffer.writeCharCode(_scanner.readChar());
       _scanner.scan(regExp);
       buffer.write(_scanner.lastMatch[0]);
     }
 
     for (var char in const [']', '(', ')']) {
       if (_scanner.matches(char)) _scanner.error('unexpected "$char"');
     }
     if (!inOptions && _scanner.matches('}')) _scanner.error('unexpected "}"');
 
-    return new LiteralNode(buffer.toString(), _context);
+    return new LiteralNode(buffer.toString(),
+        context: _context, caseSensitive: _caseSensitive);
   }
 }