* <p>
     * Visible for testing.
     */
    static boolean isLocalRepositoryArtifactOrMissing(RepositorySystemSession session, Artifact artifact) {
        return artifact.getFile() == null
                || artifact.getFile()
                        .getPath()
                        .startsWith(session.getLocalRepository().getBasedir().getPath());
    }

    /**

                boolean resolveManagedVersions,
                ArtifactRepository localRepository,
                List<ArtifactRepository> remoteRepositories) {
            File file = artifact.getFile();
            this.artifact = ArtifactUtils.copyArtifact(artifact);
            if ("pom".equals(artifact.getType()) && file != null) {
                pomHash = file.getPath().hashCode() + file.lastModified();

                project.getAttachedArtifacts().stream());
        return artifacts.map(RepositoryUtils::toArtifact);
    }

    private boolean isRegularFile(Artifact artifact) {
        return artifact.getFile() != null && artifact.getFile().isFile();
    }

    private void installIntoProjectLocalRepository(Artifact artifact) {
        Path target = getArtifactPath(artifact);
        try {

            throws PluginDescriptorParsingException, InvalidPluginDescriptorException {
        PluginDescriptor pluginDescriptor = null;

        File pluginFile = pluginArtifact.getFile();

        try {
            if (pluginFile.isFile()) {
                try (JarFile pluginJar = new JarFile(pluginFile, false)) {

        if (artifacts != null && !artifacts.isEmpty()) {
            for (Artifact artifact : artifacts) {
                if (!isProvidedArtifact(artifact) && artifact.getFile() != null) {
                    constituents.add(new ArtifactClassRealmConstituent(artifact));
                } else if (logger.isDebugEnabled()) {
                    logger.debug("  Excluded: {}", getId(artifact));

        if (Artifact.SCOPE_SYSTEM.equals(node.getArtifact().getScope())
                && (node.getArtifact().getFile() == null)
                && (artifact.getFile() != null)) {
            fireEvent(ResolutionListener.MANAGE_ARTIFACT_SYSTEM_PATH, listeners, node, artifact);
            node.getArtifact().setFile(artifact.getFile());
        }
    }

    /**
     * Check if the artifactScope needs to be updated. <a

            ArtifactRepository repository) {
        if (metadata != null && metadata.getFile() != null && metadata.getFile().isFile()) {
            try {
                Map<String, ?> options = Collections.singletonMap(MetadataReader.IS_STRICT, Boolean.FALSE);

                Metadata pluginGroupMetadata = metadataReader.read(metadata.getFile(), options);

            if (conflictingProject != null) {
                throw new DuplicateProjectException(
                        projectId,
                        conflictingProject.getFile(),
                        project.getFile(),
                        "Project '" + projectId + "' is duplicated in the reactor");
            }

        if (artifact == null) {
            return;
        }

        if (Artifact.SCOPE_SYSTEM.equals(artifact.getScope())) {
            File systemFile = artifact.getFile();

            if (systemFile == null) {
                throw new ArtifactNotFoundException("System artifact: " + artifact + " has no file attached", artifact);
            }

                        .build();

                activation.os(os);
            }

            org.apache.maven.api.model.ActivationFile modelFile = modelActivation.getFile();

            if (modelFile != null) {
                org.apache.maven.api.settings.ActivationFile file =
                        org.apache.maven.api.settings.ActivationFile.newBuilder()