dir.mkdirs();
        markForDeletion(dir);

        return dir;
    }

    public synchronized File createTempFile() throws IOException {
        File tempFile = File.createTempFile(baseFilename, fileSuffix);
        tempFile.deleteOnExit();
        markForDeletion(tempFile);

        return tempFile;
    }

    public void cleanUp() throws IOException {

        MavenProject mavenProject = new MavenProject();
        mavenProject.setArtifact(new DefaultArtifact("g", "a", "1.0", Artifact.SCOPE_TEST, "jar", "", null));
        File artifactFile = Files.createTempFile("foo", "tmp").toFile();
        try {
            mavenProjectHelper.attachArtifact(mavenProject, "java-source", artifactFile);
            assertEquals(1, mavenProject.getAttachedArtifacts().size());

        }
    }

    @Override
    public Optional<byte[]> getBytes(URI relativeSource) {
        try {
            Path tempPath = null;
            try {
                tempPath = Files.createTempFile("transport-get", "tmp");
                if (get(relativeSource, tempPath)) {
                    // TODO: check file size and prevent OOM?
                    return Optional.of(Files.readAllBytes(tempPath));

String, String) throws java.io.IOException; public static void copyDirectoryStructu(java.io.File, java.io.File) throws java.io.IOException; public static void rename(java.io.File, java.io.File) throws java.io.IOException; public static java.io.File createTempFile(String, String, java.io.File); static void <clinit>(); } org/codehaus/plexus/util/interpolation/EnvarBasedValueSourc.class package org.codehaus.plexus.util.interpolation; public synchronized class EnvarBasedValueSourc implements ValueSource {...