// second try, refetch all (possibly outdated) metadata that wasn't updated in the first attempt

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

            results = repositorySystem.resolveMetadata(session, requests);

        String pluginKey = pluginKey(mojoDescriptor);
        if (validationPluginExcludes(mavenSession.getRepositorySession()).contains(pluginKey)) {
            return;
        }
        PluginValidationIssues pluginIssues = pluginIssues(mavenSession.getRepositorySession())
                .computeIfAbsent(pluginKey, k -> new PluginValidationIssues());

        MavenSession mavenSession = createMavenSession(pomFile);
        ProjectBuildingRequest configuration = new DefaultProjectBuildingRequest();
        configuration.setRepositorySession(mavenSession.getRepositorySession());
        ModelSource modelSource = new FileModelSource(pomFile);
        ProjectBuildingResult result = getContainer()
                .lookup(org.apache.maven.project.ProjectBuilder.class)

        plugin.setVersion("0.1");
        PluginDescriptor pluginDescriptor = pluginManager.loadPlugin(
                plugin, session.getCurrentProject().getRemotePluginRepositories(), session.getRepositorySession());
        assertNotNull(pluginDescriptor);
    }

    @Test
    void testMojoDescriptorRetrieval() throws Exception {
        MavenSession session = createMavenSession(null);
        String goal = "it";

        List<MetadataResult> results = repositorySystem.resolveMetadata(request.getRepositorySession(), requests);

        Versions versions = new Versions();

        for (MetadataResult res : results) {
            ArtifactRepository repository = res.getRequest().getRepository();
            if (repository == null) {
                repository = request.getRepositorySession().getLocalRepository();
            }

        return currentSession != null ? currentSession.get() : null;
    }

    public RepositorySystemSession getRepositorySession() {
        MavenSession session = getSession();
        return (session != null) ? session.getRepositorySession() : null;
    }

                    plugin, session.getRepositorySession(), project.getRemotePluginRepositories());
            plugin.setVersion(pluginVersionResolver.resolve(versionRequest).getVersion());
        }

        try {
            return pluginManager.getPluginDescriptor(
                    plugin, project.getRemotePluginRepositories(), session.getRepositorySession());
        } catch (PluginResolutionException e) {

                        repositorySystem.injectMirror(request.getRepositorySession(), Arrays.asList(repo));
                        repositorySystem.injectProxy(request.getRepositorySession(), Arrays.asList(repo));
                        repositorySystem.injectAuthentication(request.getRepositorySession(), Arrays.asList(repo));
                        repos.add(repo);

        for (Plugin plugin : project.getBuildPlugins()) {
            if (plugin.getVersion() == null) {
                PluginVersionRequest request = new DefaultPluginVersionRequest(
                        plugin, session.getRepositorySession(), project.getRemotePluginRepositories());
                plugin.setVersion(pluginVersionResolver.resolve(request).getVersion());
            }
            versions.put(plugin.getKey(), plugin.getVersion());
        }

            @Nonnull MavenRepositorySystem mavenRepositorySystem,
            @Nonnull Lookup lookup,
            @Nonnull RuntimeInformation runtimeInformation) {
        super(
                nonNull(session).getRepositorySession(),
                repositorySystem,
                remoteRepositories,
                remoteRepositories == null
                        ? map(session.getRequest().getRemoteRepositories(), RepositoryUtils::toRepo)