protected void deleteTempDir(final File ownTmpDir) {
        if (ownTmpDir == null) {
            return;
        }
        if (!FileUtils.deleteQuietly(ownTmpDir)) {
            logger.warn("Could not delete a temp dir: {}", ownTmpDir.getAbsolutePath());
        }
    }

    /**
     * Appends JAR files from the specified directory to the classpath buffer.
     *
     * @param cpSeparator the classpath separator to use

Wants=network-online.target
After=network-online.target opensearch.service
Requires=opensearch.service

[Service]
Environment=FESS_HOME=${packaging.fess.home.dir}
EnvironmentFile=-${packaging.env.file}

User=${packaging.fess.user}
Group=${packaging.fess.group}

ExecStart=${packaging.fess.bin.dir}/fess

# Connects standard output to /dev/null
StandardOutput=null

# Connects standard error to journal
StandardError=journal

              <target name="copy-gwt-resources">
                <delete dir="${project.build.directory}/guava-gwt-sources" quiet="true" />
                <delete dir="${project.build.directory}/guava-test-gwt-sources" quiet="true" />

                <copy toDir="${project.build.directory}/guava-gwt-sources">
                  <fileset dir="${project.build.directory}/guava-sources">
                    <contains text="@GwtCompatible"/>

            if (e != null) {
                logger.warn("I/O exception on {}", dir, e);
            }
            deleteEmptyDirectory(dir);
            return FileVisitResult.CONTINUE;
        }

        private boolean deleteEmptyDirectory(final Path dir) throws IOException {
            if (dir == null) {
                return false;

     */
    public static final String JAVA_IO_TMPDIR = System.getProperty("java.io.tmpdir");

    /**
     * <code>user.dir</code> system property.
     */
    public static final String USER_DIR = System.getProperty("user.dir");

    /**
     * <code>user.home</code> system property.
     */
    public static final String USER_HOME = System.getProperty("user.home");

    /**

        assertEquals("xxx789zzz", ResourceUtil.resolve(value));

        value = "${\\$}";
        assertEquals(value, ResourceUtil.resolve(value));

        System.setProperty("test.dir", "c:\\test1\\test2");

        value = "${test.dir}";
        assertEquals("c:\\test1\\test2", ResourceUtil.resolve(value));

    }

    public void test_getAppType() {
        // Test default empty when no env var is set

d    ${packaging.fess.pid.dir}   0755 ${packaging.fess.user} ${packaging.fess.group} - -...

        File dir = null;
        final URL url = getResource(path);
        if ("file".equals(url.getProtocol())) {
            final int num = path.split("/").length;
            dir = new File(getFileName(url));
            for (int i = 0; i < num; ++i) {
                dir = dir.getParentFile();
            }
        } else {
            dir = new File(JarFileUtil.toJarFilePath(url));
        }

    assertEquals(1, result.length);
  }

  public void testPredicates() throws IOException {
    File asciiFile = getTestFile("ascii.txt");
    File dir = asciiFile.getParentFile();
    assertTrue(Files.isDirectory().apply(dir));
    assertFalse(Files.isFile().apply(dir));

    assertFalse(Files.isDirectory().apply(asciiFile));
    assertTrue(Files.isFile().apply(asciiFile));
  }

  }

  /**
   * Creates a new temp dir for testing. The returned directory and all contents of it will be
   * deleted in the tear-down for this test.
   */
  protected final File createTempDir() throws IOException {
    File tempFile = File.createTempFile("IoTestCase", "");
    if (!tempFile.delete() || !tempFile.mkdir()) {
      throw new IOException("failed to create temp dir");
    }
    filesToDelete.add(tempFile);