/*
* The MIT License
*
* Copyright (c) 2010, InfraDNA, Inc.
*
* 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 hudson.util.io;
import hudson.Functions;
import hudson.org.apache.tools.tar.TarOutputStream;
import hudson.util.FileVisitor;
import hudson.util.IOException2;
import hudson.util.IOUtils;
import org.apache.tools.tar.TarEntry;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Field;
import static org.apache.tools.tar.TarConstants.LF_SYMLINK;
/**
* {@link FileVisitor} that creates a tar archive.
*
* @see ArchiverFactory#TAR
*/
final class TarArchiver extends Archiver {
private final byte[] buf = new byte[8192];
private final TarOutputStream tar;
TarArchiver(OutputStream out) {
tar = new TarOutputStream(new BufferedOutputStream(out) {
// TarOutputStream uses TarBuffer internally,
// which flushes the stream for each block. this creates unnecessary
// data stream fragmentation, and flush request to a remote, which slows things down.
@Override
public void flush() throws IOException {
// so don't do anything in flush
}
});
tar.setLongFileMode(TarOutputStream.LONGFILE_GNU);
}
@Override
public void visitSymlink(File link, String target, String relativePath) throws IOException {
TarEntry e = new TarEntry(relativePath, LF_SYMLINK);
int mode = IOUtils.mode(link);
if (mode!=-1) e.setMode(mode);
try {
StringBuffer linkName = (StringBuffer) LINKNAME_FIELD.get(e);
linkName.setLength(0);
linkName.append(target);
} catch (IllegalAccessException x) {
throw new IOException2("Failed to set linkName", x);
}
tar.putNextEntry(e);
entriesWritten++;
}
@Override
public boolean understandsSymlink() {
return true;
}
public void visit(File file, String relativePath) throws IOException {
if(Functions.isWindows())
relativePath = relativePath.replace('\\','/');
if(file.isDirectory())
relativePath+='/';
TarEntry te = new TarEntry(relativePath);
int mode = IOUtils.mode(file);
if (mode!=-1) te.setMode(mode);
te.setModTime(file.lastModified());
if(!file.isDirectory())
te.setSize(file.length());
tar.putNextEntry(te);
if (!file.isDirectory()) {
FileInputStream in = new FileInputStream(file);
try {
int len;
while((len=in.read(buf))>=0)
tar.write(buf,0,len);
} finally {
in.close();
}
}
tar.closeEntry();
entriesWritten++;
}
public void close() throws IOException {
tar.close();
}
private static final Field LINKNAME_FIELD = getTarEntryLinkNameField();
private static Field getTarEntryLinkNameField() {
try {
Field f = TarEntry.class.getDeclaredField("linkName");
f.setAccessible(true);
return f;
} catch (SecurityException e) {
throw new AssertionError(e);
} catch (NoSuchFieldException e) {
throw new AssertionError(e);
}
}
}