Validate that an uploaded package has a LICENSE file.

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) {

[Bob Nystrom, 2012/12/08 03:21:50]

Does this do a recursive list?

[nweiz, 2012/12/08 03:24:27]

No, we don't want it picking up files in third_party or whatever.

+      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.");
+    });
+  }
+}