Commit Martin's patch for pub + lib_v2.

utils/pub/validator/dependency.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 dependency_validator;
 
+import 'dart:async';
+
 import '../entrypoint.dart';
 import '../hosted_source.dart';
 import '../http.dart';
 import '../package.dart';
 import '../utils.dart';
 import '../validator.dart';
 import '../version.dart';
 
 /// A validator that validates a package's dependencies.
 class DependencyValidator extends Validator {
@@ skipping 23 matching lines @@
       }
 
       return new Future.immediate(null);
     });
   }
 
   /// Warn that dependencies should use the hosted source.
   Future _warnAboutSource(PackageRef ref) {
     return entrypoint.cache.sources['hosted']
         .getVersions(ref.name, ref.name)
-        .transformException((e) => <Version>[])
-        .transform((versions) {
+        .catchError((e) => <Version>[])
+        .then((versions) {
       var constraint;
       var primary = Version.primary(versions);
       if (primary != null) {
         constraint = _constraintForVersion(primary);
       } else {
         constraint = ref.constraint.toString();
         if (!ref.constraint.isAny && ref.constraint is! Version) {
           constraint = '"$constraint"';
         }
       }
 
       warnings.add('Don\'t depend on "${ref.name}" from the ${ref.source.name} '
               'source. Use the hosted source instead. For example:\n'
           '\n'
           'dependencies:\n'
           '  ${ref.name}: $constraint\n'
           '\n'
           'Using the hosted source ensures that everyone can download your '
               'package\'s dependencies along with your package.');
     });
   }
 
   /// Warn that dependencies should have version constraints.
   Future _warnAboutConstraint(PackageRef ref) {
-    return entrypoint.loadLockFile().transform((lockFile) {
+    return entrypoint.loadLockFile().then((lockFile) {
       var message = 'Your dependency on "${ref.name}" should have a version '
           'constraint.';
       var locked = lockFile.packages[ref.name];
       if (locked != null) {
         message = '$message For example:\n'
           '\n'
           'dependencies:\n'
           '  ${ref.name}: ${_constraintForVersion(locked.version)}\n';
       }
       warnings.add("$message\n"
           "Without a constraint, you're promising to support all future "
           "versions of ${ref.name}.");
     });
   }
 
   /// Returns the suggested version constraint for a dependency that was tested
   /// against [version].
   String _constraintForVersion(Version version) {
     if (version.major != 0) return '">=$version <${version.major + 1}.0.0"';
     return '">=$version <${version.major}.${version.minor}.'
         '${version.patch + 1}"';
   }
 }