org.jclouds.docker.features.internal.Archives.java Source code

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Here is the source code for org.jclouds.docker.features.internal.Archives.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jclouds.docker.features.internal;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.collect.Iterables.getLast;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
import org.apache.commons.compress.archivers.tar.TarArchiveOutputStream;

import com.google.common.base.Splitter;
import com.google.common.io.Files;

public class Archives {

    public static File tar(File baseDir, String archivePath) throws IOException {
        return tar(baseDir, new File(archivePath));
    }

    public static File tar(File baseDir, File tarFile) throws IOException {
        // Check that the directory is a directory, and get its contents
        checkArgument(baseDir.isDirectory(), "%s is not a directory", baseDir);
        File[] files = baseDir.listFiles();
        String token = getLast(Splitter.on("/").split(baseDir.getAbsolutePath()));
        TarArchiveOutputStream tos = new TarArchiveOutputStream(new FileOutputStream(tarFile));
        tos.setLongFileMode(TarArchiveOutputStream.LONGFILE_GNU);
        try {
            for (File file : files) {
                TarArchiveEntry tarEntry = new TarArchiveEntry(file);
                tarEntry.setName("/" + getLast(Splitter.on(token).split(file.toString())));
                tos.putArchiveEntry(tarEntry);
                if (!file.isDirectory()) {
                    Files.asByteSource(file).copyTo(tos);
                }
                tos.closeArchiveEntry();
            }
        } finally {
            tos.close();
        }
        return tarFile;
    }

}