Make pub publish more user friendly:

utils/pub/validator/license.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 pubspec_field_validator;
 
 import '../entrypoint.dart';
 import '../io.dart';
 import '../system_cache.dart';
 import '../validator.dart';
 
 /// A validator that checks that a LICENSE-like file exists.
 class LicenseValidator extends Validator {
   LicenseValidator(Entrypoint entrypoint)
     : super(entrypoint);
 
   Future validate() {
     return listDir(entrypoint.root.dir).transform((files) {
       var licenseLike = new RegExp(
           r"^([a-zA-Z0-9]+[-_])?(LICENSE|COPYING)(\..*)?$");
       if (files.map(basename).some(licenseLike.hasMatch)) return;
 
-      errors.add("Your package must have a COPYING or LICENSE file containing "
-          "an open-source license. For more details, see "
-          "http://pub.dartlang.org/doc/pub-lish.html.");
+      errors.add("You must have a COPYING or LICENSE file in the root directory.\n"
+          "An open-source license helps ensure people can legally use your code.");

[nweiz, 2012/12/12 21:21:21]

Long lines.

[Bob Nystrom, 2012/12/12 21:45:36]

Done.

     });
   }
 }