RequestTrace trace = RequestTrace.newChild(null, plugin);

        Artifact pluginArtifact = toArtifact(plugin, session);

        try {
            DefaultRepositorySystemSession pluginSession = new DefaultRepositorySystemSession(session);
            pluginSession.setArtifactDescriptorPolicy(new SimpleArtifactDescriptorPolicy(true, false));

            ArtifactDescriptorRequest request =

    public void setUp() throws Exception {
        super.setUp();

        projectArtifact = createLocalArtifact("project", "3.0");
    }

    @Override
    protected DefaultRepositorySystemSession initRepoSession() throws Exception {
        DefaultRepositorySystemSession session = super.initRepoSession();
        session.setWorkspaceReader(new TestMavenWorkspaceReader());
        return session;
    }

    @Override

        }

        DefaultRepositorySystemSession newSession;
        if (session != null) {
            LocalRepositoryManager lrm = session.getLocalRepositoryManager();
            if (lrm != null && lrm.getRepository().getBasedir().equals(new File(repository.getBasedir()))) {
                return session;
            }
            newSession = new DefaultRepositorySystemSession(session);
        } else {

                throw new IOException("Failure while attempting to delete artifact " + artifactFile);
            }
        }
    }

    protected DefaultRepositorySystemSession initRepoSession() throws Exception {
        DefaultRepositorySystemSession session = new DefaultRepositorySystemSession(h -> false);
        session.setScopeManager(new ScopeManagerImpl(Maven4ScopeManagerConfiguration.INSTANCE));

                .setResolveTransitively(true)
                .setRemoteRepositories(getRemoteRepositories())
                .setLocalRepository(getLocalRepository());

        DefaultRepositorySystemSession session = new DefaultRepositorySystemSession();
        LocalRepository localRepo =
                new LocalRepository(request.getLocalRepository().getBasedir());

        if (!request.getRepositorySession().isOffline() && !requests.isEmpty()) {
            DefaultRepositorySystemSession session = new DefaultRepositorySystemSession(request.getRepositorySession());
            session.setUpdatePolicy(RepositoryPolicy.UPDATE_POLICY_ALWAYS);

            results = repositorySystem.resolveMetadata(session, requests);

                return session;
            }
        } else {
            session = new DefaultRepositorySystemSession();
        }

        final LocalRepositoryManager llrm = new LegacyLocalRepositoryManager(repository);

        return new DefaultRepositorySystemSession(session).setLocalRepositoryManager(llrm);
    }

    private LegacyLocalRepositoryManager(ArtifactRepository delegate) {

                .setGoals(Collections.emptyList())
                .setBaseDirectory(new File(""))
                .setLocalRepository(repo);

        DefaultRepositorySystemSession repositorySession =
                new DefaultRepositorySystemSession(h -> false); // no close handle
        repositorySession.setLocalRepositoryManager(new SimpleLocalRepositoryManagerFactory()