protected Set<Dependency> buildDependencyGraph(final Set<String> componentRefs) throws MojoExecutionException {
    final Set<Dependency> dependencies = new LinkedHashSet<>();
    final Collection<String> scope = new HashSet<>();
    if (includeCompileScope) scope.add("compile");
    if (includeProvidedScope) scope.add("provided");
    if (includeRuntimeScope) scope.add("runtime");
    if (includeSystemScope) scope.add("system");
    if (includeTestScope) scope.add("test");
    final ArtifactFilter artifactFilter = new CumulativeScopeArtifactFilter(scope);
    final ProjectBuildingRequest buildingRequest = new DefaultProjectBuildingRequest(session.getProjectBuildingRequest());
    buildingRequest.setProject(this.project);
    try {
        final DependencyNode rootNode = dependencyGraphBuilder.buildDependencyGraph(buildingRequest, artifactFilter);
        buildDependencyGraphNode(componentRefs, dependencies, rootNode, null);
        final CollectingDependencyNodeVisitor visitor = new CollectingDependencyNodeVisitor();
        rootNode.accept(visitor);
        for (final DependencyNode dependencyNode : visitor.getNodes()) {
            buildDependencyGraphNode(componentRefs, dependencies, dependencyNode, null);
        }
    } catch (DependencyGraphBuilderException e) {
        throw new MojoExecutionException("An error occurred building dependency graph", e);
    }
    return dependencies;
}
 

private Set<Artifact> getNarDependencies(final Artifact narArtifact) throws MojoExecutionException, ProjectBuildingException {
    final ProjectBuildingRequest narRequest = new DefaultProjectBuildingRequest();
    narRequest.setRepositorySession(repoSession);
    narRequest.setSystemProperties(System.getProperties());
    narRequest.setLocalRepository(localRepo);

    final ProjectBuildingResult narResult = projectBuilder.build(narArtifact, narRequest);

    final Set<Artifact> narDependencies = new TreeSet<>();
    gatherArtifacts(narResult.getProject(), narDependencies);
    narDependencies.remove(narArtifact);
    narDependencies.remove(project.getArtifact());

    getLog().debug("Found NAR dependency of " + narArtifact + ", which resolved to the following artifacts: " + narDependencies);
    return narDependencies;
}
 

@Override
public MavenProject getProject() {
  ProjectBuildingRequest buildingRequest = new DefaultProjectBuildingRequest(this.session.getProjectBuildingRequest());
  buildingRequest.setRepositorySession(this.session.getRepositorySession());
  buildingRequest.setProject(null);
  buildingRequest.setResolveDependencies(true);
  buildingRequest.setActiveProfileIds(this.profiles);

  DefaultArtifact artifact = new DefaultArtifact(this.groupId, this.artifactId, this.version, SCOPE_COMPILE, this.type, this.classifier, new DefaultArtifactHandler());
  try {
    return this.projectBuilder.build(artifact, buildingRequest).getProject();
  } catch (ProjectBuildingException e) {
    throw new IllegalStateException("Error while creating Maven project from Artifact '" + artifact + "'.", e);
  }

}
 

private ProjectBuildingRequest getProjectBuildingRequest(Properties properties)
		throws NoLocalRepositoryManagerException {
	DefaultProjectBuildingRequest projectBuildingRequest = new DefaultProjectBuildingRequest();
	DefaultRepositorySystemSession session = createSession(properties);
	projectBuildingRequest.setRepositoryMerging(RepositoryMerging.REQUEST_DOMINANT);
	projectBuildingRequest.setRemoteRepositories(mavenRepositories(properties));
	projectBuildingRequest.getRemoteRepositories()
			.addAll(mavenRepositories(settings));
	projectBuildingRequest.setRepositorySession(session);
	projectBuildingRequest.setProcessPlugins(false);
	projectBuildingRequest.setBuildStartTime(new Date());
	projectBuildingRequest.setUserProperties(properties);
	projectBuildingRequest.setSystemProperties(System.getProperties());
	return projectBuildingRequest;
}
 

private void createMavenWrapper(File createdPomFile, Properties props) {
    try {
        // we need to modify the maven environment used by the wrapper plugin since the project could have been
        // created in a directory other than the current
        MavenProject newProject = projectBuilder.build(
                createdPomFile, new DefaultProjectBuildingRequest(session.getProjectBuildingRequest())).getProject();

        MavenExecutionRequest newExecutionRequest = DefaultMavenExecutionRequest.copy(session.getRequest());
        newExecutionRequest.setBaseDirectory(createdPomFile.getParentFile());

        MavenSession newSession = new MavenSession(session.getContainer(), session.getRepositorySession(),
                newExecutionRequest, session.getResult());
        newSession.setCurrentProject(newProject);

        setProxySystemPropertiesFromSession();

        executeMojo(
                plugin(
                        groupId("io.takari"),
                        artifactId("maven"),
                        version(ToolsUtils.getMavenWrapperVersion(props))),
                goal("wrapper"),
                configuration(
                        element(name("maven"), ToolsUtils.getProposedMavenVersion(props))),
                executionEnvironment(
                        newProject,
                        newSession,
                        pluginManager));
    } catch (Exception e) {
        // no reason to fail if the wrapper could not be created
        getLog().error("Unable to install the Maven wrapper (./mvnw) in the project", e);
    }
}
 

private ArtifactResult doResolve(final ArtifactResolver resolver, final Artifact art, final MavenSession session)
        throws ArtifactResolverException {
    final ProjectBuildingRequest request = new DefaultProjectBuildingRequest(session.getProjectBuildingRequest());
    session
            .getTopLevelProject()
            .getPluginRepositories()
            .stream()
            .map(this::toArtifactRepo)
            .filter(it -> request
                    .getPluginArtifactRepositories()
                    .stream()
                    .noneMatch(a -> String.valueOf(a.getId()).equalsIgnoreCase(it.getId())))
            .forEach(it -> request.getRemoteRepositories().add(it));
    return resolver.resolveArtifact(request, art);
}
 

/**
 * Make resolve artifact project building request.
 *
 * @param session maven session, must not be null
 * @param remoteRepositories list of remote repositories, must not be null and
 * can't contain null
 * @return created request, must not be null
 */
@Nonnull
public static ProjectBuildingRequest makeResolveArtifactProjectBuildingRequest(
        @Nonnull final MavenSession session,
        @Nonnull @MustNotContainNull final List<ArtifactRepository> remoteRepositories
) {
  final ProjectBuildingRequest result = new DefaultProjectBuildingRequest(session.getProjectBuildingRequest());
  result.setRemoteRepositories(remoteRepositories);
  result.setLocalRepository(session.getLocalRepository());
  return result;
}
 

private ProjectBuildingRequest getProjectBuildingRequest(Properties properties)
		throws NoLocalRepositoryManagerException {
	DefaultProjectBuildingRequest projectBuildingRequest = new DefaultProjectBuildingRequest();
	DefaultRepositorySystemSession session = createSession(properties);
	projectBuildingRequest.setRepositoryMerging(RepositoryMerging.REQUEST_DOMINANT);
	projectBuildingRequest.setRemoteRepositories(mavenRepositories(properties));
	projectBuildingRequest.getRemoteRepositories()
			.addAll(mavenRepositories(this.settings));
	projectBuildingRequest.setRepositorySession(session);
	projectBuildingRequest.setProcessPlugins(false);
	projectBuildingRequest.setBuildStartTime(new Date());
	projectBuildingRequest.setUserProperties(properties);
	projectBuildingRequest.setSystemProperties(System.getProperties());
	return projectBuildingRequest;
}
 

/**
 * Tests method to create effective POM.
 *
 * @throws Exception if something goes wrong.
 */
@Test
public void testCreateEffectivePom()
    throws Exception
{

    String magicValue = "magic-value";
    Properties userProperties = new Properties();
    userProperties.setProperty( "cmd.test.property", magicValue );

    File pomFile = new File( "src/test/resources/cmdpropertysubstituion/pom.xml" );
    ArtifactRepository localRepository = new MavenArtifactRepository();
    localRepository.setLayout( new DefaultRepositoryLayout() );
    ArtifactFactory artifactFactory = new DefaultArtifactFactory();
    ArtifactHandlerManager artifactHandlerManager = new DefaultArtifactHandlerManager();
    setDeclaredField( artifactFactory, "artifactHandlerManager", artifactHandlerManager );
    Map<String, ArtifactHandler> artifactHandlers = new HashMap<String, ArtifactHandler>();
    setDeclaredField( artifactHandlerManager, "artifactHandlers", artifactHandlers );
    DefaultDependencyResolver depencencyResolver = new DefaultDependencyResolver();
    DefaultProjectBuildingRequest projectBuildingRequest = new DefaultProjectBuildingRequest();
    FlattenModelResolver resolver = new FlattenModelResolver( localRepository, artifactFactory,
            depencencyResolver, projectBuildingRequest, Collections.<MavenProject>emptyList() );
    ModelBuildingRequest buildingRequest =
        new DefaultModelBuildingRequest().setPomFile( pomFile ).setModelResolver( resolver ).setUserProperties( userProperties );
    setDeclaredField( tested, "modelBuilderThreadSafetyWorkaround", buildModelBuilderThreadSafetyWorkaroundForTest() );
    Model effectivePom = tested.createEffectivePom( buildingRequest, false, FlattenMode.defaults );
    assertThat( effectivePom.getName() ).isEqualTo( magicValue );
}
 

private String findProvidedDependencyVersion(final Set<Artifact> artifacts, final String groupId, final String artifactId) {
    final ProjectBuildingRequest projectRequest = new DefaultProjectBuildingRequest();
    projectRequest.setRepositorySession(repoSession);
    projectRequest.setSystemProperties(System.getProperties());
    projectRequest.setLocalRepository(localRepo);

    for (final Artifact artifact : artifacts) {
        final Set<Artifact> artifactDependencies = new HashSet<>();
        try {
            final ProjectBuildingResult projectResult = projectBuilder.build(artifact, projectRequest);
            gatherArtifacts(projectResult.getProject(), artifactDependencies);
            getLog().debug("For Artifact " + artifact + ", found the following dependencies:");
            artifactDependencies.forEach(dep -> getLog().debug(dep.toString()));

            for (final Artifact dependency : artifactDependencies) {
                if (dependency.getGroupId().equals(groupId) && dependency.getArtifactId().equals(artifactId)) {
                    getLog().debug("Found version of " + groupId + ":" + artifactId + " to be " + artifact.getVersion());
                    return artifact.getVersion();
                }
            }
        } catch (final Exception e) {
            getLog().warn("Unable to construct Maven Project for " + artifact + " when attempting to determine the expected version of NiFi API");
            getLog().debug("Unable to construct Maven Project for " + artifact + " when attempting to determine the expected version of NiFi API", e);
        }
    }

    return null;
}
 

@Override
@SuppressWarnings({"PMD.EmptyCatchBlock", "PMD.CyclomaticComplexity"})
public void execute() throws MojoExecutionException, MojoFailureException {

    ArrayNode root = new ArrayNode(JsonNodeFactory.instance);

    URLClassLoader classLoader = null;
    try {
        PluginDescriptor desc = (PluginDescriptor) getPluginContext().get("pluginDescriptor");
        List<Artifact> artifacts = desc.getArtifacts();
        ProjectBuildingRequest buildingRequest =
            new DefaultProjectBuildingRequest(session.getProjectBuildingRequest());
        buildingRequest.setRemoteRepositories(remoteRepositories);
        for (Artifact artifact : artifacts) {
            ArtifactResult result = artifactResolver.resolveArtifact(buildingRequest, artifact);
            File jar = result.getArtifact().getFile();
            classLoader = createClassLoader(jar);
            if (classLoader == null) {
                throw new IOException("Can not create classloader for " + jar);
            }
            ObjectNode entry = new ObjectNode(JsonNodeFactory.instance);
            addConnectorMeta(entry, classLoader);
            addComponentMeta(entry, classLoader);
            if (entry.size() > 0) {
                addGav(entry, artifact);
                root.add(entry);
            }
        }
        if (root.size() > 0) {
            saveCamelMetaData(root);
        }
    } catch (ArtifactResolverException | IOException e) {
        throw new MojoExecutionException(e.getMessage(), e);
    } finally {
        if (classLoader != null) {
            try {
                classLoader.close();
            } catch (IOException ignored) {

            }
        }
    }
}
 

@Override
public void execute() throws MojoExecutionException, MojoFailureException {
    try {
        // find the nar dependency
        Artifact narArtifact = null;
        for (final Artifact artifact : project.getDependencyArtifacts()) {
            if (NAR.equals(artifact.getType())) {
                // ensure the project doesn't have two nar dependencies
                if (narArtifact != null) {
                    throw new MojoExecutionException("Project can only have one NAR dependency.");
                }

                // record the nar dependency
                narArtifact = artifact;
            }
        }

        // ensure there is a nar dependency
        if (narArtifact == null) {
            throw new MojoExecutionException("Project does not have any NAR dependencies.");
        }

        // build the project for the nar artifact
        final ProjectBuildingRequest narRequest = new DefaultProjectBuildingRequest();
        narRequest.setRepositorySession(repoSession);
        narRequest.setSystemProperties(System.getProperties());

        final ProjectBuildingResult narResult = projectBuilder.build(narArtifact, narRequest);
        narRequest.setProject(narResult.getProject());

        // get the artifact handler for excluding dependencies
        final ArtifactHandler narHandler = excludesDependencies(narArtifact);
        narArtifact.setArtifactHandler(narHandler);

        // nar artifacts by nature includes dependencies, however this prevents the
        // transitive dependencies from printing using tools like dependency:tree.
        // here we are overriding the artifact handler for all nars so the
        // dependencies can be listed. this is important because nar dependencies
        // will be used as the parent classloader for this nar and seeing what
        // dependencies are provided is critical.
        final Map<String, ArtifactHandler> narHandlerMap = new HashMap<>();
        narHandlerMap.put(NAR, narHandler);
        artifactHandlerManager.addHandlers(narHandlerMap);

        // get the dependency tree
        final DependencyNode root = dependencyGraphBuilder.buildDependencyGraph(narRequest, null);

        // write the appropriate output
        DependencyNodeVisitor visitor = null;
        if ("tree".equals(mode)) {
            visitor = new TreeWriter();
        } else if ("pom".equals(mode)) {
            visitor = new PomWriter();
        }

        // ensure the mode was specified correctly
        if (visitor == null) {
            throw new MojoExecutionException("The specified mode is invalid. Supported options are 'tree' and 'pom'.");
        }

        // visit and print the results
        root.accept(visitor);
        getLog().info("--- Provided NAR Dependencies ---\n\n" + visitor.toString());
    } catch (ProjectBuildingException | DependencyGraphBuilderException e) {
        throw new MojoExecutionException("Cannot build project dependency tree", e);
    }
}