Add Bob's path library to pub.

utils/pub/validator/name.dart

 // Copyright (c) 2012, 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 name_validator;
 
 import 'dart:io';
 
 import '../entrypoint.dart';
 import '../io.dart';
+import '../path.dart' as path;
 import '../validator.dart';
 
 /// Dart reserved words, from the Dart spec.
 final _RESERVED_WORDS = [
   "abstract", "as", "dynamic", "export", "external", "factory", "get",
   "implements", "import", "library", "operator", "part", "set", "static",
   "typedef"
 ];
 
 /// A validator that validates the name of the package and its libraries.
 class NameValidator extends Validator {
   NameValidator(Entrypoint entrypoint)
     : super(entrypoint);
 
   Future validate() {
     _checkName(entrypoint.root.name, 'Package name "${entrypoint.root.name}"');
 
     var libDir = join(entrypoint.root.dir, "lib");
     return dirExists(libDir).chain((libDirExists) {
       if (!libDirExists) return new Future.immediate([]);
       return listDir(libDir, recursive: true);
     }).transform((files) {
       for (var file in files) {
-        // TODO(nweiz): Since `file` is absolute, this will break if the package
-        // itself is in a directory named "src" (issue 7215).
+        file = relativeTo(file, libDir);
         if (splitPath(file).contains("src")) continue;
-        if (new Path(file).extension != 'dart') continue;
-        var libName = new Path(basename(file)).filenameWithoutExtension;
+        if (path.extension(file) != '.dart') continue;
+        var libName = path.filenameWithoutExtension(file);
         _checkName(libName, 'The name of "$file", "$libName",');
       }
     });
   }
 
   void _checkName(String name, String description) {
     if (name == "") {
       errors.add("$description may not be empty.");
     } else if (!new RegExp(r"^[a-zA-Z0-9_]*$").hasMatch(name)) {
       errors.add("$description must be a valid Dart identifier: it may only "
@@ skipping 17 matching lines @@
       builder
         ..add(source.substring(lastMatchEnd, match.start + 1))
         ..add("_")
         ..add(match.group(1).toLowerCase());
       lastMatchEnd = match.end;
     }
     builder.add(source.substring(lastMatchEnd));
     return builder.toString().toLowerCase();
   }
 }