gistfile1.txt

public class UploadManager implements Plugin<Project> {
	@Override
	public void apply(Project project) {
		final Authenticator authenticator = project.getTasks().add( "nexusAuthHandler", Authenticator.class );

		project.getTasks().allTasks(
				new Action<Task>() {
					@Override
					public void execute(Task task) {
						if ( Upload.class.isInstance( task ) ) {
							final Upload uploadTask = (Upload) task;
							RemoteRepository repository = uploadTask.getRepositories().mavenDeployer().getRepository();
							if ( repository != null ) {
								authenticator.addRepository( repository );
								uploadTask.getDependsOn().add( authenticator );
							}
							repository = uploadTask.getRepositories().mavenDeployer().getSnapshotRepository();
							if ( repository != null ) {
								authenticator.addRepository( repository );
								uploadTask.getDependsOn().add( authenticator );
							}
						}
					}
				}
		);
	}
}