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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.container.plugin.mojo;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
/**
* @author Tony Vaagenes
*/
public class Compression {
public static void zipDirectory(File dir, String zipTopLevelDir) throws Exception {
FileOutputStream zipFile = new FileOutputStream(new File(dir.getParent(), dir.getName() + ".zip"));
ZipOutputStream zipOutputStream = new ZipOutputStream(zipFile);
try {
addDirectory(zipOutputStream, zipTopLevelDir, dir, "");
} finally {
zipOutputStream.close();
}
}
private static void addDirectory(ZipOutputStream zipOutputStream, String zipTopLevelDir, File baseDir, String relativePath) throws IOException {
File currentDir = new File(baseDir, relativePath);
for (File child : currentDir.listFiles()) {
if (child.isDirectory()) {
addDirectory(zipOutputStream, zipTopLevelDir, baseDir, composePath(relativePath, child.getName()));
} else {
addFile(zipOutputStream, zipTopLevelDir, relativePath, child);
}
}
}
private static void addFile(ZipOutputStream zipOutputStream, String zipTopLevelDir, String relativePath, File child) throws IOException {
ZipEntry entry = new ZipEntry(composePath(zipTopLevelDir, composePath(relativePath, child.getName())));
zipOutputStream.putNextEntry(entry);
try {
try (FileInputStream fileInput = new FileInputStream(child)) {
fileInput.transferTo(zipOutputStream);
}
} finally {
zipOutputStream.closeEntry();
}
}
private static String composePath(String relativePath, String subDir) {
return relativePath.isEmpty() ?
subDir :
relativePath + File.separator + subDir;
}
}
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