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/*
* This file is part of fabric-loom, licensed under the MIT License (MIT).
*
* Copyright (c) 2016-2021 FabricMC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package net.fabricmc.loom.util;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.attribute.FileTime;
import java.util.Calendar;
import java.util.Comparator;
import java.util.GregorianCalendar;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;
public class ZipReprocessorUtil {
/**
* See {@link org.gradle.api.internal.file.archive.ZipCopyAction} about this.
*/
private static final long CONSTANT_TIME_FOR_ZIP_ENTRIES = new GregorianCalendar(1980, Calendar.FEBRUARY, 1, 0, 0, 0).getTimeInMillis();
private ZipReprocessorUtil() { }
public static void reprocessZip(File file, boolean reproducibleFileOrder, boolean preserveFileTimestamps) throws IOException {
if (!reproducibleFileOrder && preserveFileTimestamps) {
return;
}
try (ZipFile zipFile = new ZipFile(file)) {
ZipEntry[] entries;
if (reproducibleFileOrder) {
entries = zipFile.stream().sorted(Comparator.comparing(ZipEntry::getName)).toArray(ZipEntry[]::new);
} else {
entries = zipFile.stream().toArray(ZipEntry[]::new);
}
ByteArrayOutputStream outZip = new ByteArrayOutputStream(zipFile.size());
try (ZipOutputStream zipOutputStream = new ZipOutputStream(outZip)) {
for (ZipEntry entry : entries) {
ZipEntry newEntry = entry;
if (!preserveFileTimestamps) {
newEntry = new ZipEntry(entry.getName());
newEntry.setTime(CONSTANT_TIME_FOR_ZIP_ENTRIES);
newEntry.setLastModifiedTime(FileTime.fromMillis(CONSTANT_TIME_FOR_ZIP_ENTRIES));
newEntry.setLastAccessTime(FileTime.fromMillis(CONSTANT_TIME_FOR_ZIP_ENTRIES));
}
zipOutputStream.putNextEntry(newEntry);
InputStream inputStream = zipFile.getInputStream(entry);
byte[] buf = new byte[1024];
int length;
while ((length = inputStream.read(buf)) > 0) {
zipOutputStream.write(buf, 0, length);
}
zipOutputStream.closeEntry();
}
}
try (FileOutputStream fileOutputStream = new FileOutputStream(file)) {
outZip.writeTo(fileOutputStream);
}
}
}
}
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