gistfile1.java

root :
<sonar:sonar_project key="foo" version="1.1">
  <modules>
    <path location="one"/>
    <path location="two"/>
  </modules>
</sonar:sonar_project>


modules :
<sonar:sonar_project key="<module key>" version="<module version>">
</sonar:sonar_project>



Task :

public class SonarProjectTask extends Task {
  private String key;
  private String version;
  private Path modules;

  public void setKey(String key) {
    this.key = key;
  }

  public String getKey() {
    return key;
  }

  public void setVersion(String version) {
    this.version = version;
  }

  public String getVersion() {
    return version;
  }

  public Path createModules() {
    if (modules == null) {
      modules = new Path(getProject());
    }
    return modules;
  }

  @Override
  public void execute() {

    getProject().setProperty("sonar.key", key);
    getProject().addReference("sonar.version", version);

    if (modules != null) {
      System.out.println(String.format("--------- modules of %s-----------", getProject().getName()));
      for (String path : modules.list()) {
        Project module = getProject().createSubProject();
        ProjectHelper.configureProject(module, new File(path, "build.xml"));
        System.out.println(module.getProperty("sonar.key") + " v." + module.getReference("sonar.version"));
      }
    }

  }
}