Dev dependencies.

utils/pub/version_solver.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.
 
 /// Attempts to resolve a set of version constraints for a package dependency
 /// graph and select an appropriate set of best specific versions for all
 /// dependent packages. It works iteratively and tries to reach a stable
 /// solution where the constraints of all dependencies are met. If it fails to
 /// reach a solution after a certain number of iterations, it assumes the
 /// dependency graph is unstable and reports and error.
@@ skipping 265 matching lines @@
         solver.enqueue(new AddConstraint(package, newRef));
       }
     });
   }
 
   /// Get the dependencies at [version] of the package being changed.
   Future<Map<String, PackageRef>> getDependencyRefs(VersionSolver solver,
       Version version) {
     // If there is no version, it means no package, so no dependencies.
     if (version == null) {
-      return
-          new Future<Map<String, PackageRef>>.immediate(<String, PackageRef>{});
+      return new Future<Map<String, PackageRef>>.immediate(
+          <String, PackageRef>{});
     }
 
     var id = new PackageId(package, source, version, description);
     return solver._pubspecs.load(id).then((pubspec) {
       var dependencies = <String, PackageRef>{};
       for (var dependency in pubspec.dependencies) {
         dependencies[dependency.name] = dependency;
       }
+
+      // Include dev dependencies only from the root package.
+      if (id.isRoot) {
+        for (var dependency in pubspec.devDependencies) {
+          dependencies[dependency.name] = dependency;
+        }
+      }
+
       return dependencies;
     });
   }
 }
 
 /// A constraint that a depending package places on a dependent package has
 /// changed.
 ///
 /// This is an abstract class that contains logic for updating the dependency
 /// graph once a dependency has changed. Changing the dependency is the
@@ skipping 391 matching lines @@
 
   String toString() {
     // TODO(nweiz): Dump descriptions to YAML when that's supported.
     return "Incompatible dependencies on '$package':\n"
         "- '$depender1' depends on it with description "
         "${json.stringify(description1)}\n"
         "- '$depender2' depends on it with description "
         "${json.stringify(description2)}";
   }
 }