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/*******************************************************************************
* Copyright (c) 2007 compeople AG and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* compeople AG (Stefan Liebig) - initial API and implementation
* IBM - continuing development
*******************************************************************************/
package org.eclipse.equinox.internal.p2.artifact.processor.pack200;
import java.io.*;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.equinox.internal.p2.core.helpers.FileUtils;
import org.eclipse.equinox.internal.p2.jarprocessor.UnpackStep;
import org.eclipse.equinox.p2.artifact.repository.IArtifactDescriptor;
import org.eclipse.equinox.p2.artifact.repository.processing.ProcessingStep;
import org.eclipse.equinox.p2.artifact.repository.processing.ProcessingStepDescriptor;
import org.eclipse.equinox.p2.jarprocessor.JarProcessorExecutor;
import org.eclipse.equinox.p2.jarprocessor.JarProcessorExecutor.Options;
/**
* The Pack200Unpacker expects an input containing ".jar.pack.gz" data.
*/
public class Unpack200Step extends ProcessingStep {
public static final String ID = "org.eclipse.equinox.p2.artifact.processor.pack200"; //$NON-NLS-1$
public static final String JAR_SUFFIX = ".jar"; //$NON-NLS-1$
public static final String PACKED_SUFFIX = ".pack.gz"; //$NON-NLS-1$
private final static String PACKED_EXT = JAR_SUFFIX + PACKED_SUFFIX;
private File packed;
private OutputStream tempStream;
public void close() throws IOException {
// When we go to close we must have seen all the content we are going to see
// So before closing, run unpack and write the unpacked result to the destination
performUnpack();
super.close();
if (status == null)
status = Status.OK_STATUS;
}
private OutputStream getOutputStream() throws IOException {
if (tempStream != null)
return tempStream;
// store input stream in temporary file
packed = File.createTempFile("p2.pack200", PACKED_EXT);
tempStream = new BufferedOutputStream(new FileOutputStream(packed));
return tempStream;
}
public void initialize(ProcessingStepDescriptor descriptor, IArtifactDescriptor context) {
super.initialize(descriptor, context);
if (!UnpackStep.canUnpack())
status = new Status(IStatus.ERROR, ID, "Unpack facility not configured");
}
private void performUnpack() throws IOException {
BufferedInputStream unpackedStream = null;
File unpacked = null;
File workDir = null;
try {
if (tempStream == null)
// hmmm, no one wrote to this stream so there is nothing to pass on
return;
// Ok, so there is content, close the tempStream
tempStream.close();
// now create a temporary directory for the JarProcessor to work in
// TODO How to create a unique, temporary directory atomically?
workDir = File.createTempFile("p2.unpack.", "");
if (!workDir.delete())
throw new IOException("Could not delete file for creating temporary working dir.");
if (!workDir.mkdirs())
throw new IOException("Could not create temporary working dir.");
// unpack
Options options = new Options();
options.unpack = true;
options.processAll = true;
options.input = packed;
options.outputDir = workDir.getPath();
new JarProcessorExecutor().runJarProcessor(options);
// now write the unpacked content to our destination
String packedFileName = packed.getName();
unpacked = new File(workDir, packedFileName.substring(0, packedFileName.length() - PACKED_SUFFIX.length()));
if (unpacked.length() == 0)
System.out.println("Empty file unpacked: " + unpacked);
unpackedStream = new BufferedInputStream(new FileInputStream(unpacked));
FileUtils.copyStream(unpackedStream, true, destination, false);
} finally {
// note that unpackedStream will be closed by copyStream()
if (packed != null)
packed.delete();
if (unpacked != null)
unpacked.delete();
if (workDir != null)
FileUtils.deleteAll(workDir);
}
}
public void write(int b) throws IOException {
OutputStream stream = getOutputStream();
stream.write(b);
}
}
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