org.apache.commons.compress.archivers.tar.TarArchiveOutputStream Java Examples

private static void addToTar(TarArchiveOutputStream out, File file, String dir) throws IOException {
    String entry = dir + File.separator + file.getName();
    if (file.isFile()){
        out.putArchiveEntry(new TarArchiveEntry(file, entry));
        try (FileInputStream in = new FileInputStream(file)){
            org.apache.commons.compress.utils.IOUtils.copy(in, out);
        }
        out.closeArchiveEntry();
    } else if (file.isDirectory()) {
        File[] children = file.listFiles();
        if (children != null){
            for (File child : children){
                addToTar(out, child, entry);
            }
        }
    } else {
        System.out.println(file.getName() + " is not supported");
    }
}
 

private void addExtensions(TarArchiveOutputStream tos, Integration integration) throws IOException {
    final Set<String> extensions = resourceManager.collectDependencies(integration).stream()
        .filter(d-> d.isExtension() || d.isExtensionTag())
        .map(Dependency::getId)
        .collect(Collectors.toCollection(TreeSet::new));

    if (!extensions.isEmpty()) {
        addTarEntry(tos, "src/main/resources/loader.properties", generateExtensionLoader(extensions));

        for (String extensionId : extensions) {
            try (InputStream is =
                     resourceManager.loadExtensionBLOB(extensionId).orElseThrow(
                         () -> new IllegalStateException("No extension blob for extension with id:" + extensionId)
                     )) {
                addTarEntry(
                    tos,
                    "extensions/" + Names.sanitize(extensionId) + ".jar",
                    IOUtils.toByteArray(is)
                );
            }
        }
    }
}
 

@Override
public void onRegister(CompileScope scope) {
    // register classes ...
    registerWrapperClass(scope, ArchiveEntry.class, PArchiveEntry.class);
    registerWrapperClass(scope, TarArchiveEntry.class, PTarArchiveEntry.class);
    registerWrapperClass(scope, ZipArchiveEntry.class, PZipArchiveEntry.class);

    registerWrapperClass(scope, ArchiveInputStream.class, PArchiveInput.class);
    registerWrapperClass(scope, TarArchiveInputStream.class, PTarArchiveInput.class);
    registerWrapperClass(scope, ZipArchiveInputStream.class, PZipArchiveInput.class);

    registerWrapperClass(scope, ArchiveOutputStream.class, PArchiveOutput.class);
    registerWrapperClass(scope, TarArchiveOutputStream.class, PTarArchiveOutput.class);
    registerWrapperClass(scope, ZipArchiveOutputStream.class, PZipArchiveOutput.class);

    registerClass(scope, PGzipOutputStream.class);
    registerClass(scope, PGzipInputStream.class);
    registerClass(scope, PBzip2OutputStream.class);
    registerClass(scope, PBZip2InputStream.class);
    registerClass(scope, PLz4OutputStream.class);
    registerClass(scope, PLz4InputStream.class);

    registerClass(scope, PArchive.class);
    registerClass(scope, PTarArchive.class);
    registerClass(scope, PZipArchive.class);
}
 

public static File archiveTARFiles(File base, Iterable<File> files, String archiveNameWithOutExtension)
        throws IOException {
    File tarFile = new File(FileUtils.getTempDirectoryPath(), archiveNameWithOutExtension + ".tar");
    tarFile.deleteOnExit();
    try (TarArchiveOutputStream tos = new TarArchiveOutputStream(new GZIPOutputStream(new BufferedOutputStream(
            new FileOutputStream(tarFile))))) {
        tos.setLongFileMode(TarArchiveOutputStream.LONGFILE_GNU);
        for (File file : files) {
            // relativize with method using Path otherwise method with File resolves the symlinks
            // and this is not want we want. If the file is a symlink, the relativized path should
            // keep the symlink name and not the target it points to.
            addFileToTar(tos, file.toPath(), relativize(base.toPath(), file.toPath()));
        }
    }

    return tarFile;
}
 

private void buildAndAddControlFile () throws IOException, FileNotFoundException
{
    final File controlFile = File.createTempFile ( "control", null );
    try
    {
        try ( GZIPOutputStream gout = new GZIPOutputStream ( new FileOutputStream ( controlFile ) );
              TarArchiveOutputStream tout = new TarArchiveOutputStream ( gout ) )
        {
            tout.setLongFileMode ( TarArchiveOutputStream.LONGFILE_GNU );

            addControlContent ( tout, "control", createControlContent (), -1 );
            addControlContent ( tout, "md5sums", createChecksumContent (), -1 );
            addControlContent ( tout, "conffiles", createConfFilesContent (), -1 );
            addControlContent ( tout, "preinst", this.preinstScript, EntryInformation.DEFAULT_FILE_EXEC.getMode () );
            addControlContent ( tout, "prerm", this.prermScript, EntryInformation.DEFAULT_FILE_EXEC.getMode () );
            addControlContent ( tout, "postinst", this.postinstScript, EntryInformation.DEFAULT_FILE_EXEC.getMode () );
            addControlContent ( tout, "postrm", this.postrmScript, EntryInformation.DEFAULT_FILE_EXEC.getMode () );
        }
        addArFile ( controlFile, "control.tar.gz" );
    }
    finally
    {
        controlFile.delete ();
    }
}
 

public DebianPackageWriter ( final OutputStream stream, final GenericControlFile packageControlFile, final TimestampProvider timestampProvider ) throws IOException
{
    this.packageControlFile = packageControlFile;
    this.timestampProvider = timestampProvider;
    if ( getTimestampProvider () == null )
    {
        throw new IllegalArgumentException ( "'timestampProvider' must not be null" );
    }
    BinaryPackageControlFile.validate ( packageControlFile );

    this.ar = new ArArchiveOutputStream ( stream );

    this.ar.putArchiveEntry ( new ArArchiveEntry ( "debian-binary", this.binaryHeader.length, 0, 0, AR_ARCHIVE_DEFAULT_MODE, getTimestampProvider ().getModTime () / 1000 ) );
    this.ar.write ( this.binaryHeader );
    this.ar.closeArchiveEntry ();

    this.dataTemp = File.createTempFile ( "data", null );

    this.dataStream = new TarArchiveOutputStream ( new GZIPOutputStream ( new FileOutputStream ( this.dataTemp ) ) );
    this.dataStream.setLongFileMode ( TarArchiveOutputStream.LONGFILE_GNU );
}
 

private static void addFileEntry(
    TarArchiveOutputStream tarOut, String entryName, File file, long modTime) throws IOException {
  final TarArchiveEntry tarEntry = new TarArchiveEntry(file, entryName);
  if (modTime >= 0) {
    tarEntry.setModTime(modTime);
  }
  tarOut.putArchiveEntry(tarEntry);
  try (InputStream in = new BufferedInputStream(new FileInputStream(file))) {
    final byte[] buf = new byte[BUF_SIZE];
    int r;
    while ((r = in.read(buf)) != -1) {
      tarOut.write(buf, 0, r);
    }
  }
  tarOut.closeArchiveEntry();
}
 

/**
 * writeTarZst writes a .tar.zst file to 'file'.
 *
 * <p>For each key:value in archiveContents, a file named 'key' with contents 'value' will be
 * created in the archive. File names ending with "/" are considered directories.
 */
private void writeTarZst(Path file, Map<String, byte[]> archiveContents) throws IOException {
  try (OutputStream o = new BufferedOutputStream(Files.newOutputStream(file));
      OutputStream z = new ZstdCompressorOutputStream(o);
      TarArchiveOutputStream archive = new TarArchiveOutputStream(z)) {
    archive.setLongFileMode(TarArchiveOutputStream.LONGFILE_POSIX);
    for (Entry<String, byte[]> mapEntry : archiveContents.entrySet()) {
      String fileName = mapEntry.getKey();
      byte[] fileContents = mapEntry.getValue();
      boolean isRegularFile = !fileName.endsWith("/");

      TarArchiveEntry e = new TarArchiveEntry(fileName);
      if (isRegularFile) {
        e.setSize(fileContents.length);
        archive.putArchiveEntry(e);
        archive.write(fileContents);
      } else {
        archive.putArchiveEntry(e);
      }
      archive.closeArchiveEntry();
    }
    archive.finish();
  }
}
 

private void writeContentEntry(final TarArchiveOutputStream tarOut, final InputStream inStream, final long fileSize) throws IOException {
    final TarArchiveEntry entry = new TarArchiveEntry(FILENAME_CONTENT);
    entry.setMode(tarPermissions);
    entry.setSize(fileSize);
    tarOut.putArchiveEntry(entry);
    final byte[] buffer = new byte[512 << 10];//512KB
    int bytesRead = 0;
    while ((bytesRead = inStream.read(buffer)) != -1) { //still more data to read
        if (bytesRead > 0) {
            tarOut.write(buffer, 0, bytesRead);
        }
    }

    copy(inStream, tarOut);
    tarOut.closeArchiveEntry();
}
 

private void writeAttributesEntry(final Map<String, String> attributes, final TarArchiveOutputStream tout) throws IOException {
    final StringBuilder sb = new StringBuilder();
    sb.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?><!DOCTYPE properties\n  SYSTEM \"http://java.sun.com/dtd/properties.dtd\">\n");
    sb.append("<properties>");
    for (final Map.Entry<String, String> entry : attributes.entrySet()) {
        final String escapedKey = StringEscapeUtils.escapeXml11(entry.getKey());
        final String escapedValue = StringEscapeUtils.escapeXml11(entry.getValue());
        sb.append("\n  <entry key=\"").append(escapedKey).append("\">").append(escapedValue).append("</entry>");
    }
    sb.append("</properties>");

    final byte[] metaBytes = sb.toString().getBytes(StandardCharsets.UTF_8);
    final TarArchiveEntry attribEntry = new TarArchiveEntry(FILENAME_ATTRIBUTES);
    attribEntry.setMode(tarPermissions);
    attribEntry.setSize(metaBytes.length);
    tout.putArchiveEntry(attribEntry);
    tout.write(metaBytes);
    tout.closeArchiveEntry();
}
 

@Test(expected = ArchiveExtractionException.class)
public void extractTarAsZip_ArchiveExtractionExceptionIsThrown()
        throws IOException, ArchiveExtractionException{
    File archiveFile = new File(baseDir, "archive.zip");
    archiveFile.createNewFile();
    Path tempArchive = archiveFile.toPath();

    try (OutputStream fo = Files.newOutputStream(
            tempArchive); OutputStream gzo = new GzipCompressorOutputStream(
            fo); ArchiveOutputStream o = new TarArchiveOutputStream(gzo)) {
        o.putArchiveEntry(
                o.createArchiveEntry(new File(ROOT_FILE), ROOT_FILE));
        o.closeArchiveEntry();
    }

    new DefaultArchiveExtractor().extract(archiveFile, targetDir);

}
 

/**
 * Compresses the content of source and stores newly created archive in dest.
 * In case source is a directory, it will be compressed recursively.
 *
 * @param source file or folder to be archived. Should exist on method call.
 * @param dest   path to the archive to be created. Should not exist on method call.
 * @throws IOException           in case of any issues with underlying store.
 * @throws FileNotFoundException in case source does not exist.
 */
public static void tar(@NotNull File source, @NotNull File dest) throws IOException {
    if (!source.exists()) {
        throw new IllegalArgumentException("No source file or folder exists: " + source.getAbsolutePath());
    }
    if (dest.exists()) {
        throw new IllegalArgumentException("Destination refers to existing file or folder: " + dest.getAbsolutePath());
    }

    try (TarArchiveOutputStream tarOut = new TarArchiveOutputStream(new GZIPOutputStream(
            new BufferedOutputStream(new FileOutputStream(dest)), 0x1000))) {
        doTar("", source, tarOut);
    } catch (IOException e) {
        IOUtil.deleteFile(dest); // operation filed, let's remove the destination archive
        throw e;
    }
}
 

private static void addTarDir(
        TarArchiveOutputStream tout,
        Path base,
        File dir
) throws IOException {
    Preconditions.checkArgument(dir.isDirectory());
    String name = base.relativize(
            Paths.get(dir.getAbsolutePath())
    ).toString();
    ArchiveEntry entry = tout.createArchiveEntry(dir, name);
    tout.putArchiveEntry(entry);
    tout.closeArchiveEntry();
    for (File f : dir.listFiles()) {
        addTarEntry(tout, base, f);
    }
}
 

/**
 * Creates a tar entry for the path specified with a name built from the base
 * passed in and the file/directory name. If the path is a directory, a
 * recursive call is made such that the full directory is added to the tar.
 *
 * @param tOut
 *          The tar file's output stream
 * @param path
 *          The filesystem path of the file/directory being added
 * @param base
 *          The base prefix to for the name of the tar file entry
 *
 * @throws IOException
 *           If anything goes wrong
 */
private static void addFileToTarGz(TarArchiveOutputStream tOut, String path, String base)
    throws IOException {
  File f = new File(path);
  String entryName = base + f.getName();
  TarArchiveEntry tarEntry = new TarArchiveEntry(f, entryName);

  tOut.setLongFileMode(TarArchiveOutputStream.LONGFILE_GNU);
  tOut.putArchiveEntry(tarEntry);

  if (f.isFile()) {
    IOUtils.copy(new FileInputStream(f), tOut);

    tOut.closeArchiveEntry();
  } else {
    tOut.closeArchiveEntry();

    File[] children = f.listFiles();

    if (children != null) {
      for (File child : children) {
        addFileToTarGz(tOut, child.getAbsolutePath(), entryName + "/");
      }
    }
  }
}
 

public static void compressTarFile(
        final File temporaryTarFile,
        final Path pathToCompress,
        final BuildListener listener)
        throws IOException {
    try (final TarArchiveOutputStream tarArchiveOutputStream =
                 new TarArchiveOutputStream(
                 new BufferedOutputStream(
                 new FileOutputStream(temporaryTarFile)))) {

        compressArchive(
                pathToCompress,
                tarArchiveOutputStream,
                new ArchiveEntryFactory(CompressionType.Tar),
                CompressionType.Tar,
                listener);
    }
}
 

private void writeAttributesEntry(final Map<String, String> attributes, final TarArchiveOutputStream tout) throws IOException {
    final StringBuilder sb = new StringBuilder();
    sb.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?><!DOCTYPE properties\n  SYSTEM \"http://java.sun.com/dtd/properties.dtd\">\n");
    sb.append("<properties>");
    for (final Map.Entry<String, String> entry : attributes.entrySet()) {
        final String escapedKey = StringEscapeUtils.escapeXml11(entry.getKey());
        final String escapedValue = StringEscapeUtils.escapeXml11(entry.getValue());
        sb.append("\n  <entry key=\"").append(escapedKey).append("\">").append(escapedValue).append("</entry>");
    }
    sb.append("</properties>");

    final byte[] metaBytes = sb.toString().getBytes(StandardCharsets.UTF_8);
    final TarArchiveEntry attribEntry = new TarArchiveEntry(FILENAME_ATTRIBUTES);
    attribEntry.setMode(tarPermissions);
    attribEntry.setSize(metaBytes.length);
    tout.putArchiveEntry(attribEntry);
    tout.write(metaBytes);
    tout.closeArchiveEntry();
}
 

private static void addTarFile(
        TarArchiveOutputStream tout,
        Path base,
        File file
) throws IOException {
    Preconditions.checkArgument(
            file.isFile(),
            "given file" +
            " is not file: %s", file);
    checkFileSize(file.length());
    String name = base.relativize(
            Paths.get(file.getAbsolutePath())
    ).toString();
    ArchiveEntry entry = tout.createArchiveEntry(file, name);
    tout.putArchiveEntry(entry);
    try (InputStream in = new FileInputStream(file)) {
        IOUtils.copy(in, tout);
    }
    tout.closeArchiveEntry();
}
 

private void addArchive(File file, TarArchiveOutputStream aos,
		String basepath) throws Exception {
	if (file.exists()) {
		TarArchiveEntry entry = new TarArchiveEntry(basepath + "/"
				+ file.getName());
		entry.setSize(file.length());
		aos.putArchiveEntry(entry);
		BufferedInputStream bis = new BufferedInputStream(
				new FileInputStream(file));
		int count;
		byte data[] = new byte[1024];
		while ((count = bis.read(data, 0, data.length)) != -1) {
			aos.write(data, 0, count);
		}
		bis.close();
		aos.closeArchiveEntry();
	}
}
 

private void writeContentEntry(final TarArchiveOutputStream tarOut, final InputStream inStream, final long fileSize) throws IOException {
    final TarArchiveEntry entry = new TarArchiveEntry(FILENAME_CONTENT);
    entry.setMode(tarPermissions);
    entry.setSize(fileSize);
    tarOut.putArchiveEntry(entry);
    final byte[] buffer = new byte[512 << 10];//512KB
    int bytesRead = 0;
    while ((bytesRead = inStream.read(buffer)) != -1) { //still more data to read
        if (bytesRead > 0) {
            tarOut.write(buffer, 0, bytesRead);
        }
    }

    copy(inStream, tarOut);
    tarOut.closeArchiveEntry();
}
 

/**
 * create TarGzipPacker object
 */
public static TarGzipPacker createTarGzipPacker(String targetDir, Config config) {
  // this should be received from config
  String archiveFilename = SchedulerContext.jobPackageFileName(config);
  Path archiveFile = Paths.get(targetDir + "/" + archiveFilename);

  try {
    // construct output stream
    OutputStream outStream = Files.newOutputStream(archiveFile);
    GzipCompressorOutputStream gzipOutputStream = new GzipCompressorOutputStream(outStream);
    TarArchiveOutputStream tarOutputStream = new TarArchiveOutputStream(gzipOutputStream);

    return new TarGzipPacker(archiveFile, tarOutputStream);
  } catch (IOException ioe) {
    LOG.log(Level.SEVERE, "Archive file can not be created: " + archiveFile, ioe);
    return null;
  }
}
 

@Override
public void initialize(UimaContext aContext)
        throws ResourceInitializationException
{
    super.initialize(aContext);

    // some param check
    if (!outputFile.getName().endsWith(".tar.gz")) {
        throw new ResourceInitializationException(
                new IllegalArgumentException("Output file must have .tar.gz extension"));
    }

    typeSystemWritten = false;

    try {
        outputStream = new TarArchiveOutputStream(new GzipCompressorOutputStream(
                new BufferedOutputStream(new FileOutputStream(outputFile))));
    }
    catch (IOException ex) {
        throw new ResourceInitializationException(ex);
    }
}
 

public DebianPackageWriter ( final OutputStream stream, final BinaryPackageControlFile packageControlFile, final Supplier<Instant> timestampSupplier ) throws IOException
{
    Objects.requireNonNull ( timestampSupplier );

    this.timestampSupplier = timestampSupplier;
    this.packageControlFile = packageControlFile;
    BinaryPackageControlFile.validate ( packageControlFile );

    this.ar = new ArArchiveOutputStream ( stream );

    this.ar.putArchiveEntry ( new ArArchiveEntry ( "debian-binary", this.binaryHeader.length, 0, 0, AR_ARCHIVE_DEFAULT_MODE, timestampSupplier.get ().getEpochSecond () ) );
    this.ar.write ( this.binaryHeader );
    this.ar.closeArchiveEntry ();

    this.dataTemp = File.createTempFile ( "data", null );

    this.dataStream = new TarArchiveOutputStream ( new GZIPOutputStream ( new FileOutputStream ( this.dataTemp ) ) );
    this.dataStream.setLongFileMode ( TarArchiveOutputStream.LONGFILE_GNU );
}
 

private static void addToArchive(TarArchiveOutputStream taos, File dir, File root) throws IOException {
    byte[] buffer = new byte[1024];
    int length;
    int index = root.getAbsolutePath().length();
    for (File file : dir.listFiles()) {
        String name = file.getAbsolutePath().substring(index);
        if (file.isDirectory()) {
            if (file.listFiles().length != 0) {
                addToArchive(taos, file, root);
            } else {
                taos.putArchiveEntry(new TarArchiveEntry(name + File.separator));
                taos.closeArchiveEntry();
            }
        } else {
            try (FileInputStream fis = new FileInputStream(file)) {
                TarArchiveEntry entry = new TarArchiveEntry(name);
                entry.setSize(file.length());
                taos.putArchiveEntry(entry);
                while ((length = fis.read(buffer)) > 0) {
                    taos.write(buffer, 0, length);
                }
                taos.closeArchiveEntry();
            }
        }
    }
}
 

@Test
public void readInvalidJsonInArchive() throws IOException {
    byte[] archiveBytes;

    try (ByteArrayOutputStream baos = new ByteArrayOutputStream();
        TarArchiveOutputStream tarOutput = new TarArchiveOutputStream(baos)) {
        final byte[] entryData = ("}" + UUID.randomUUID().toString() + "{").getBytes();
        TarArchiveEntry tarEntry = new TarArchiveEntry("not-the-" + ImageArchiveUtil.MANIFEST_JSON);
        tarEntry.setSize(entryData.length);
        tarOutput.putArchiveEntry(tarEntry);
        tarOutput.write(entryData);
        tarOutput.closeArchiveEntry();
        tarOutput.finish();
        archiveBytes = baos.toByteArray();
    }

    ImageArchiveManifest manifest = ImageArchiveUtil.readManifest(new ByteArrayInputStream(archiveBytes));
    Assert.assertNull(manifest);
}
 

public static void archiveDB(final String location, final String target) {
    try {
        System.out.println("Dumping " + location + " to " + target);
        final File root = new File(location);
        final File targetFile = new File(target);
        TarArchiveOutputStream tarGz = new TarArchiveOutputStream(new GZIPOutputStream(
                new BufferedOutputStream(new FileOutputStream(targetFile)), 0x1000));
        for (final File file : IOUtil.listFiles(root)) {
            final long fileSize = file.length();
            if (file.isFile() && fileSize != 0) {
                CompressBackupUtil.archiveFile(tarGz, new BackupStrategy.FileDescriptor(file, ""), fileSize);
            }
        }
        tarGz.close();
    } catch (IOException ioe) {
        System.out.println("Can't create backup");
    }
}
 

/**
 * Helper method for {@link #tar(FileSystem, FileSystem, Path, Path)} that recursively adds a directory to a given
 * {@link TarArchiveOutputStream}.
 */
private static void dirToTarArchiveOutputStreamRecursive(FileStatus dirFileStatus, FileSystem fs,
    Optional<Path> destDir, TarArchiveOutputStream tarArchiveOutputStream) throws IOException {

  Preconditions.checkState(fs.isDirectory(dirFileStatus.getPath()));

  Path dir = destDir.isPresent() ? new Path(destDir.get(), dirFileStatus.getPath().getName())
      : new Path(dirFileStatus.getPath().getName());
  dirToTarArchiveOutputStream(dir, tarArchiveOutputStream);

  for (FileStatus childFileStatus : fs.listStatus(dirFileStatus.getPath())) {
    Path childFile = new Path(dir, childFileStatus.getPath().getName());

    if (fs.isDirectory(childFileStatus.getPath())) {
      dirToTarArchiveOutputStreamRecursive(childFileStatus, fs, Optional.of(childFile), tarArchiveOutputStream);
    } else {
      try (FSDataInputStream fsDataInputStream = fs.open(childFileStatus.getPath())) {
        fileToTarArchiveOutputStream(childFileStatus, fsDataInputStream, childFile, tarArchiveOutputStream);
      }
    }
  }
}
 

/**
 * 目录归档
 *
 * @param dir
 * @param taos
 *            TarArchiveOutputStream
 * @param basePath
 * @throws Exception
 */
private static void archiveDir(File dir, TarArchiveOutputStream taos,
                               String basePath) throws Exception {

    File[] files = dir.listFiles();

    if (files.length < 1) {
        TarArchiveEntry entry = new TarArchiveEntry(basePath
                + dir.getName() + PATH);

        taos.putArchiveEntry(entry);
        taos.closeArchiveEntry();
    }

    for (File file : files) {

        // 递归归档
        archive(file, taos, basePath + dir.getName() + PATH);

    }
}
 

@Override
protected byte[] prepareData() throws IOException {
	try (
		ByteArrayOutputStream os = new ByteArrayOutputStream();
		TarArchiveOutputStream tos = new TarArchiveOutputStream(os);
	) {
		byte[] bytes = "hello world".getBytes();
		TarArchiveEntry entry = new TarArchiveEntry("file.txt");
		entry.setSize(bytes.length);
		tos.putArchiveEntry(entry);
		tos.write(bytes);
		tos.closeArchiveEntry();
		tos.close();
		return os.toByteArray();
	}	
}
 

public static File archiveTARFiles(File base, Iterable<File> files, String archiveNameWithOutExtension) throws IOException {
    File tarFile = new File(FileUtils.getTempDirectoryPath(), archiveNameWithOutExtension + ".tar");
    TarArchiveOutputStream tos = new TarArchiveOutputStream(new FileOutputStream(tarFile));
    try {
        tos.setLongFileMode(TarArchiveOutputStream.LONGFILE_GNU);
        for (File file : files) {
            TarArchiveEntry tarEntry = new TarArchiveEntry(file);
            tarEntry.setName(relativize(base, file));

            tos.putArchiveEntry(tarEntry);

            if (!file.isDirectory()) {
                FileUtils.copyFile(file, tos);
            }
            tos.closeArchiveEntry();
        }
    } finally {
        tos.close();
    }

    return tarFile;
}
 

/**
 * This method creates a gzip tarball of the specified directory. File permissions will be
 * retained. The file will be created in a temporary directory using the {@link
 * Files#createTempFile(String, String, java.nio.file.attribute.FileAttribute[])} method. The
 * returned object is auto-closeable, and upon closing it, the archive file will be deleted.
 *
 * @param directory the directory to compress
 * @return a Path object representing the compressed directory
 * @throws IOException if the compressed directory could not be created.
 */
public static CompressedDirectory create(final Path directory) throws IOException {
  final Path file = Files.createTempFile("docker-client-", ".tar.gz");

  final Path dockerIgnorePath = directory.resolve(".dockerignore");
  final ImmutableList<DockerIgnorePathMatcher> ignoreMatchers =
      parseDockerIgnore(dockerIgnorePath);

  try (final OutputStream fileOut = Files.newOutputStream(file);
       final GzipCompressorOutputStream gzipOut = new GzipCompressorOutputStream(fileOut);
       final TarArchiveOutputStream tarOut = new TarArchiveOutputStream(gzipOut)) {
    tarOut.setLongFileMode(LONGFILE_POSIX);
    tarOut.setBigNumberMode(BIGNUMBER_POSIX);
    Files.walkFileTree(directory,
                       EnumSet.of(FileVisitOption.FOLLOW_LINKS),
                       Integer.MAX_VALUE,
                       new Visitor(directory, ignoreMatchers, tarOut));

  } catch (Throwable t) {
    // If an error occurs, delete temporary file before rethrowing exclude.
    try {
      Files.delete(file);
    } catch (IOException e) {
      // So we don't lose track of the reason the file was deleted... might be important
      t.addSuppressed(e);
    }

    throw t;
  }

  return new CompressedDirectory(file);
}