// Not using File#lastModified() to avoid a Linux JDK8 milliseconds precision bug: JDK-8177809.
            long artifactLastModified =
                    Files.getLastModifiedTime(packagedArtifactFile.toPath()).toMillis();

            if (session.getProjectBuildingRequest().getBuildStartTime() != null) {
                long buildStartTime =

        RepositorySystemSession rss = new MavenSessionBuilderSupplier(repositorySystem)
                .get()
                .withLocalRepositoryBaseDirectories(new File("target").toPath())
                .build();
        DefaultMavenExecutionRequest mer = new DefaultMavenExecutionRequest();
        DefaultMavenExecutionResult meres = new DefaultMavenExecutionResult();

                if (pluginXml.isFile()) {
                    pluginDescriptor = parsePluginDescriptor(
                            () -> Files.newInputStream(pluginXml.toPath()), plugin, pluginXml.getAbsolutePath());
                }
            }

            if (pluginDescriptor == null) {

            File remoteFile = new File(remoteRepo.getBasedir(), remoteRepo.pathOf(artifact));

            Files.createDirectories(localFile.toPath().getParent());
            Files.copy(remoteFile.toPath(), localFile.toPath());
        }

        artifact.setResolved(true);
    }

    public void retrieve(
            ArtifactRepository repository,
            File destination,

                    public Object getValue(String expression) {
                        if (projectDir != null && "baseUri".equals(expression)) {
                            return projectDir.getAbsoluteFile().toPath().toUri().toASCIIString();
                        }
                        return null;
                    }
                },
                PROJECT_PREFIXES,
                false);

        String parentContent = new String(Files.readAllBytes(parent.toPath()), StandardCharsets.UTF_8);
        parentContent = parentContent.replace(
                "<packaging>pom</packaging>",
                "<packaging>pom</packaging><properties><addedProperty>addedValue</addedProperty></properties>");
        Files.write(parent.toPath(), parentContent.getBytes(StandardCharsets.UTF_8));
        // re-build pom with modified parent

            if (!temp.renameTo(destination)) {
                try {
                    Files.copy(
                            temp.toPath(),
                            destination.toPath(),
                            StandardCopyOption.REPLACE_EXISTING,
                            StandardCopyOption.COPY_ATTRIBUTES);

                    if (!temp.delete()) {

     * TODO share with DefaultPluginMappingManager.
     */
    protected Metadata readMetadata(File mappingFile) throws RepositoryMetadataReadException {

        try (InputStream in = Files.newInputStream(mappingFile.toPath())) {
            return new Metadata(new MetadataStaxReader().read(in, false));
        } catch (FileNotFoundException e) {