public void initialise() {
    pathResolver = new Resolver(repository, log);

    // Add ant-types path
    project
        .getDependencySet()
        .addPath(
            new Path(
                "ant-types",
                "Dependencies added to this path are available to ant optional tasks."));

    // Get dependency sets, applying profiles and overrides
    List sets = depthFirst(project.getDependencySet());

    // O pass: aggregate overrides
    for (Iterator i = sets.iterator(); i.hasNext(); ) {
      DependencySet set = (DependencySet) i.next();
      overrides.addAll(set.getOverrides());
    }

    // 1st pass: Define targets, paths, imported URLs
    Map targets = new HashMap();

    for (Iterator i = sets.iterator(); i.hasNext(); ) {
      DependencySet set = (DependencySet) i.next();

      // Get targets
      for (Iterator j = set.getDependencies().iterator(); j.hasNext(); ) {
        Dependency dependency = (Dependency) j.next();

        if (dependency instanceof PluginDependency) {
          resolveTargets(targets, (PluginDependency) dependency);
        }
      }

      // Get paths
      for (Iterator j = set.getPaths().values().iterator(); j.hasNext(); ) {
        addPath((Path) j.next());
      }

      if (set.getImportURL() != null) {
        resolvedImports.add(set.getImportURL());
      }

      // Find the unique names for all declared artifacts
      Set uniqueNames = new HashSet();

      for (Iterator j = project.getArtifacts().iterator(); j.hasNext(); ) {
        Artifact artifact = (Artifact) j.next();
        uniqueNames.add(artifact.getId().getName());
      }

      // Create artifacts for any licenses referenced by files
      for (Iterator j = set.getLicenses().iterator(); j.hasNext(); ) {
        License license = (License) j.next();

        if (license.getFile() != null) {
          Assert.isTrue(
              project.getArtifacts().size() != 0,
              license.getLocator(),
              "There are no artifacts defined for a license to be applied to.");

          Artifact artifact = (Artifact) project.getArtifacts().iterator().next();
          RepoArtifactId id = artifact.getId();

          // If no name is specified, default it to name of the artifact if it is unique,
          // otherwise use the default from the group
          String name = license.getId().getName();
          String defaultName = RepoArtifactId.defaultName(id.getGroup());

          if (name == null) {
            if (uniqueNames.size() == 1) {
              name = (String) uniqueNames.iterator().next();
            } else {
              name = defaultName;
            }
          }

          Artifact licenseArtifact = new Artifact(id.getGroup(), name, "license", id.getVersion());
          licenseArtifact.setDescription(
              "License for " + id.getGroup() + (name.equals(defaultName) ? "" : (":" + name)));
          project.addArtifact(licenseArtifact);
          license.setId(licenseArtifact.getId());
        }
      }
    }

    // 2nd pass: Define default paths specs, add imported targets
    for (Iterator i = sets.iterator(); i.hasNext(); ) {
      DependencySet set = (DependencySet) i.next();

      // Fill in path spec defaults now that the project paths have been defined
      addPathSpecDefaults(set);
    }

    // 3rd pass: Reverse order for build resources
    List reverse = new ArrayList(sets);
    Collections.reverse(reverse);

    for (Iterator i = reverse.iterator(); i.hasNext(); ) {
      DependencySet set = (DependencySet) i.next();
      buildResources.putAll(set.getBuildResources()); // Parent overrides children
    }

    resolvedTargets = targets;
    corePath = resolveCorePath();

    if ("true".equals(antProject.getProperty("quokka.project.overrideCore"))) {
      coreOverrides = getCoreOverrides();
    }
  }
  private void addTarget(Map resolved, Target target) {
    //        System.out.println("Adding " + target.getName() + " from " + parents);
    if (target.getPrefix() != null) {
      target.setDefaultProperties(expandPrefix(target.getPrefix(), target.getDefaultProperties()));
    }

    Target existing = (Target) resolved.get(target.getName());

    if (existing != null) {
      RepoArtifactId targetId = target.getPlugin().getArtifact().getId();
      RepoArtifactId existingId = existing.getPlugin().getArtifact().getId();
      Assert.isTrue(
          targetId.equals(existingId),
          target.getLocator(),
          "Multiple targets are defined with the name '"
              + target.getName()
              + "'. Declared in "
              + targetId
              + " and "
              + existingId);

      return;
    }

    resolved.put(target.getName(), target);
    registerTypes(target);
    registerProjectPaths(target);
    buildResources.putAll(target.getPlugin().getBuildResources());

    // PluginDependency declares the target
    addDependentTargets(resolved, target);

    if (target.getImplementsPlugin() != null) {
      // PluginDependency implements the target declared in another plugin
      String[] implementsPlugin = parseImplements(target);
      RepoArtifactId declaringPluginId =
          fastFindMatchingDependency(
              target,
              new RepoArtifactId(
                  implementsPlugin[0], implementsPlugin[1], "plugin", (Version) null));

      Plugin declaringPlugin = getPluginInstance(declaringPluginId);
      String declaringTargetName = declaringPlugin.getNameSpace() + ":" + implementsPlugin[2];

      // Get the declaring plugin and find the matching target
      Target declaringTarget = (Target) resolved.get(declaringTargetName);

      if (declaringTarget == null) {
        declaringTarget = declaringPlugin.getTarget(declaringTargetName);
        Assert.isTrue(
            declaringTarget != null,
            target.getLocator(),
            "'"
                + declaringTargetName
                + "' is not defined in '"
                + declaringPluginId.toShortString()
                + "'");
        addTarget(resolved, declaringTarget);
      }

      Assert.isTrue(
          declaringTarget.isAbstract(),
          target.getLocator(),
          "Target is attempting to implement a non-abstract target: target="
              + target.getName()
              + ", implements="
              + declaringTarget.getName());
      target.getPlugin().setDeclaringPlugin(declaringTarget.getPlugin());

      if (!declaringTarget.isImplemented()) {
        declaringTarget.setImplemented(true);
        declaringTarget.clearDependencies();
      }

      declaringTarget.addDependency(target.getName());

      // Add the declaring targets dependencies to ensure the implementation is executed before them
      for (Iterator i = declaringTarget.getOriginalDependencies().iterator(); i.hasNext(); ) {
        String dependency = (String) i.next();
        target.addDependency(dependency);
      }
    }
  }