Compress directory to tar.gz with Commons Compress

Question

I\'m running into a problem using the commons compress library to create a tar.gz of a directory. I have a directory structure that is as follows.

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Answer 1

Something I use (via Files.walk API), you can chain gzip(tar(youFile));

public static File gzip(File fileToCompress) throws IOException {

    final File gzipFile = new File(fileToCompress.toPath().getParent().toFile(),
            fileToCompress.getName() + ".gz");

    final byte[] buffer = new byte[1024];

    try (FileInputStream in = new FileInputStream(fileToCompress);
            GZIPOutputStream out = new GZIPOutputStream(
                    new FileOutputStream(gzipFile))) {

        int len;
        while ((len = in.read(buffer)) > 0) {
            out.write(buffer, 0, len);
        }
    }

    return gzipFile;
}

public static File tar(File folderToCompress) throws IOException, ArchiveException {

    final File tarFile = Files.createTempFile(null, ".tar").toFile();

    try (TarArchiveOutputStream out = (TarArchiveOutputStream) new ArchiveStreamFactory()
            .createArchiveOutputStream(ArchiveStreamFactory.TAR,
                    new FileOutputStream(tarFile))) {

        out.setLongFileMode(TarArchiveOutputStream.LONGFILE_GNU);

        Files.walk(folderToCompress.toPath()) //
                .forEach(source -> {

                    if (source.toFile().isFile()) {
                        final String relatifSourcePath = StringUtils.substringAfter(
                                source.toString(), folderToCompress.getPath());

                        final TarArchiveEntry entry = new TarArchiveEntry(
                                source.toFile(), relatifSourcePath);

                        try (InputStream in = new FileInputStream(source.toFile())){
                            out.putArchiveEntry(entry);

                            IOUtils.copy(in, out);

                            out.closeArchiveEntry();
                        }
                        catch (IOException e) {
                            // Handle this better than bellow...
                            throw new RuntimeException(e);
                        }
                    }
                });

    }

    return tarFile;
}