in src/main/java/org/apache/maven/artifact/ant/AbstractArtifactTask.java [469:478]
protected void updateRepositoryProxy(RemoteRepository repository) {
if ( repository.getProxy() == null )
{
org.apache.maven.settings.Proxy proxy = getSettings().getActiveProxy();
if ( proxy != null )
{
repository.addProxy( new Proxy( proxy ) );
}
}
}