bundles/org.eclipse.equinox.p2.repository.tools/src/org/eclipse/equinox/p2/internal/repository/tools/RecreateRepositoryApplication.java

/*******************************************************************************
 * Copyright (c) 2009 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.equinox.p2.internal.repository.tools;

import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.util.*;
import org.eclipse.core.runtime.*;
import org.eclipse.equinox.internal.p2.artifact.repository.simple.SimpleArtifactRepository;
import org.eclipse.equinox.internal.provisional.p2.artifact.repository.*;
import org.eclipse.equinox.internal.provisional.p2.artifact.repository.processing.ProcessingStepDescriptor;
import org.eclipse.equinox.internal.provisional.p2.core.ProvisionException;
import org.eclipse.equinox.internal.provisional.p2.metadata.IArtifactKey;
import org.eclipse.equinox.internal.provisional.p2.repository.IRepository;
import org.eclipse.equinox.internal.provisional.p2.repository.IRepositoryManager;
import org.eclipse.osgi.util.NLS;

public class RecreateRepositoryApplication {
	static final private String PUBLISH_PACK_FILES_AS_SIBLINGS = "publishPackFilesAsSiblings"; //$NON-NLS-1$
	private RepositoryDescriptor descriptor;
	private String repoName = null;
	boolean removeArtifactRepo = true;
	private Map repoProperties = null;
	private Map repoMap = null;

	public IStatus run(IProgressMonitor monitor) throws ProvisionException, IOException {

		try {
			IArtifactRepository repository = initialize(monitor);
			removeRepository(repository, monitor);
			recreateRepository(monitor);
		} finally {
			if (removeArtifactRepo) {
				IArtifactRepositoryManager repositoryManager = Activator.getArtifactRepositoryManager();
				repositoryManager.removeRepository(descriptor.getRepoLocation());
			}
		}

		return Status.OK_STATUS;
	}

	public void setArtifactRepository(RepositoryDescriptor descriptor) {
		this.descriptor = descriptor;
	}

	private IArtifactRepository initialize(IProgressMonitor monitor) throws ProvisionException {
		IArtifactRepositoryManager repositoryManager = Activator.getArtifactRepositoryManager();
		removeArtifactRepo = !repositoryManager.contains(descriptor.getRepoLocation());

		IArtifactRepository repository = repositoryManager.loadRepository(descriptor.getRepoLocation(), IRepositoryManager.REPOSITORY_HINT_MODIFIABLE, monitor);

		if (repository == null || !repository.isModifiable())
			throw new ProvisionException(NLS.bind(Messages.exception_destinationNotModifiable, repository.getLocation()));
		if (!(repository instanceof IFileArtifactRepository))
			throw new ProvisionException(NLS.bind(Messages.exception_notLocalFileRepo, repository.getLocation()));

		repoName = repository.getName();
		repoProperties = repository.getProperties();

		repoMap = new HashMap();
		IArtifactKey[] keys = repository.getArtifactKeys();
		for (int i = 0; i < keys.length; i++) {
			IArtifactDescriptor[] descriptors = repository.getArtifactDescriptors(keys[i]);
			repoMap.put(keys[i], descriptors);
		}

		return repository;
	}

	private void removeRepository(IArtifactRepository repository, IProgressMonitor monitor) throws ProvisionException, IOException {
		IArtifactRepositoryManager manager = Activator.getArtifactRepositoryManager();
		manager.removeRepository(repository.getLocation());

		boolean compressed = Boolean.valueOf((String) repoProperties.get(IRepository.PROP_COMPRESSED)).booleanValue();
		URI realLocation = SimpleArtifactRepository.getActualLocation(repository.getLocation(), compressed);
		File realFile = URIUtil.toFile(realLocation);

		if (!realFile.exists() || !realFile.delete())
			throw new ProvisionException(NLS.bind(Messages.exception_unableToRemoveRepo, realFile.toString()));
	}

	private void recreateRepository(IProgressMonitor monitor) throws ProvisionException {
		IArtifactRepositoryManager manager = Activator.getArtifactRepositoryManager();

		//add pack200 mappings, the existing repoProperties is not modifiable 
		Map newProperties = new HashMap(repoProperties);
		newProperties.put(PUBLISH_PACK_FILES_AS_SIBLINGS, "true"); //$NON-NLS-1$
		IArtifactRepository repository = manager.createRepository(descriptor.getRepoLocation(), repoName, IArtifactRepositoryManager.TYPE_SIMPLE_REPOSITORY, newProperties);
		if (!(repository instanceof IFileArtifactRepository))
			throw new ProvisionException(NLS.bind(Messages.exception_notLocalFileRepo, repository.getLocation()));

		IFileArtifactRepository simple = (IFileArtifactRepository) repository;
		for (Iterator iterator = repoMap.keySet().iterator(); iterator.hasNext();) {
			IArtifactKey key = (IArtifactKey) iterator.next();
			IArtifactDescriptor[] descriptors = (IArtifactDescriptor[]) repoMap.get(key);

			String unpackedSize = null;
			File packFile = null;
			Set files = new HashSet();
			for (int i = 0; i < descriptors.length; i++) {
				File artifactFile = simple.getArtifactFile(descriptors[i]);
				files.add(artifactFile);

				String size = Long.toString(artifactFile.length());

				ArtifactDescriptor newDescriptor = new ArtifactDescriptor(descriptors[i]);
				newDescriptor.setProperty(IArtifactDescriptor.ARTIFACT_SIZE, size);
				newDescriptor.setProperty(IArtifactDescriptor.DOWNLOAD_SIZE, size);
				//only set an MD5 if there was one to start with
				if (newDescriptor.getProperties().containsKey(IArtifactDescriptor.DOWNLOAD_MD5))
					newDescriptor.setProperty(IArtifactDescriptor.DOWNLOAD_MD5, RepositoryUtilities.computeMD5(artifactFile));

				File temp = new File(artifactFile.getParentFile(), artifactFile.getName() + ".pack.gz"); //$NON-NLS-1$
				if (temp.exists()) {
					packFile = temp;
					unpackedSize = size;
				}

				repository.addDescriptor(newDescriptor);
			}
			if (packFile != null && !files.contains(packFile)) {
				ArtifactDescriptor packDescriptor = createPack200ArtifactDescriptor(key, packFile, unpackedSize);
				repository.addDescriptor(packDescriptor);
			}
		}
	}

	private ArtifactDescriptor createPack200ArtifactDescriptor(IArtifactKey key, File packFile, String installSize) {
		final String PACKED_FORMAT = "packed"; //$NON-NLS-1$

		if (packFile != null && packFile.exists()) {
			ArtifactDescriptor result = new ArtifactDescriptor(key);
			result.setProperty(IArtifactDescriptor.ARTIFACT_SIZE, installSize);
			result.setProperty(IArtifactDescriptor.DOWNLOAD_SIZE, Long.toString(packFile.length()));
			ProcessingStepDescriptor[] steps = new ProcessingStepDescriptor[] {new ProcessingStepDescriptor("org.eclipse.equinox.p2.processing.Pack200Unpacker", null, true)}; //$NON-NLS-1$
			result.setProcessingSteps(steps);
			result.setProperty(IArtifactDescriptor.FORMAT, PACKED_FORMAT);
			return result;
		}
		return null;
	}
}