tikhomirov@526: /*
tikhomirov@526:  * Copyright (c) 2013 TMate Software Ltd
tikhomirov@526:  *  
tikhomirov@526:  * This program is free software; you can redistribute it and/or modify
tikhomirov@526:  * it under the terms of the GNU General Public License as published by
tikhomirov@526:  * the Free Software Foundation; version 2 of the License.
tikhomirov@526:  *
tikhomirov@526:  * This program is distributed in the hope that it will be useful,
tikhomirov@526:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
tikhomirov@526:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
tikhomirov@526:  * GNU General Public License for more details.
tikhomirov@526:  *
tikhomirov@526:  * For information on how to redistribute this software under
tikhomirov@526:  * the terms of a license other than GNU General Public License
tikhomirov@526:  * contact TMate Software at support@hg4j.com
tikhomirov@526:  */
tikhomirov@526: package org.tmatesoft.hg.core;
tikhomirov@526: 
tikhomirov@526: import java.io.File;
tikhomirov@526: import java.util.Arrays;
tikhomirov@526: import java.util.LinkedHashSet;
tikhomirov@526: import java.util.Set;
tikhomirov@526: 
tikhomirov@526: import org.tmatesoft.hg.internal.DirstateBuilder;
tikhomirov@526: import org.tmatesoft.hg.internal.DirstateReader;
tikhomirov@526: import org.tmatesoft.hg.internal.Experimental;
tikhomirov@526: import org.tmatesoft.hg.internal.Internals;
tikhomirov@526: import org.tmatesoft.hg.repo.HgInvalidRevisionException;
tikhomirov@526: import org.tmatesoft.hg.repo.HgManifest;
tikhomirov@526: import org.tmatesoft.hg.repo.HgRepository;
tikhomirov@526: import org.tmatesoft.hg.repo.HgRuntimeException;
tikhomirov@526: import org.tmatesoft.hg.repo.HgManifest.Flags;
tikhomirov@526: import org.tmatesoft.hg.util.CancelledException;
tikhomirov@526: import org.tmatesoft.hg.util.Path;
tikhomirov@526: 
tikhomirov@526: /**
tikhomirov@526:  * WORK IN PROGRESS.
tikhomirov@526:  * 
tikhomirov@526:  * Restore files to their checkout state, 'hg revert' counterpart.
tikhomirov@526:  * 
tikhomirov@526:  * @author Artem Tikhomirov
tikhomirov@526:  * @author TMate Software Ltd.
tikhomirov@526:  */
tikhomirov@526: @Experimental(reason="Work in progress")
tikhomirov@526: public class HgRevertCommand extends HgAbstractCommand<HgRevertCommand> {
tikhomirov@526: 
tikhomirov@526: 	private final HgRepository repo;
tikhomirov@526: 	private final Set<Path> files = new LinkedHashSet<Path>();
tikhomirov@526: 	private int changesetToCheckout = HgRepository.WORKING_COPY; // XXX WORKING_COPY_PARENT, in fact
tikhomirov@526: 	private boolean keepOriginal = true;
tikhomirov@526: 
tikhomirov@526: 	public HgRevertCommand(HgRepository hgRepo) {
tikhomirov@526: 		repo = hgRepo;
tikhomirov@526: 	}
tikhomirov@526: 
tikhomirov@526: 	/**
tikhomirov@526: 	 * Additive
tikhomirov@526: 	 * 
tikhomirov@526: 	 * @param paths files to revert
tikhomirov@526: 	 * @return <code>this</code> for convenience
tikhomirov@526: 	 */
tikhomirov@526: 	public HgRevertCommand file(Path... paths) {
tikhomirov@526: 		files.addAll(Arrays.asList(paths));
tikhomirov@526: 		return this;
tikhomirov@526: 	}
tikhomirov@526: 
tikhomirov@526: 	/**
tikhomirov@526: 	 * Revert the given files to their states as of a specific revision
tikhomirov@526: 	 * 
tikhomirov@526: 	 * @param changesetRevIndex
tikhomirov@526: 	 * @return <code>this</code> for convenience
tikhomirov@526: 	 * @throws HgBadArgumentException
tikhomirov@526: 	 */
tikhomirov@526: 	public HgRevertCommand changeset(int changesetRevIndex) throws HgBadArgumentException {
tikhomirov@526: 		int lastCsetIndex = repo.getChangelog().getLastRevision();
tikhomirov@526: 		if (changesetRevIndex < 0 || changesetRevIndex > lastCsetIndex) {
tikhomirov@526: 			throw new HgBadArgumentException(String.format("Bad revision index %d, value from [0..%d] expected", changesetRevIndex, lastCsetIndex), null).setRevisionIndex(changesetRevIndex);
tikhomirov@526: 		}
tikhomirov@526: 		changesetToCheckout = changesetRevIndex;
tikhomirov@526: 		return this;
tikhomirov@526: 	}
tikhomirov@526: 	
tikhomirov@526: 	/**
tikhomirov@526: 	 * Handy supplement to {@link #changeset(int)}
tikhomirov@526: 	 * 
tikhomirov@526: 	 * @param revision
tikhomirov@526: 	 * @return <code>this</code> for convenience
tikhomirov@526: 	 * @throws HgBadArgumentException
tikhomirov@526: 	 */
tikhomirov@526: 	public HgRevertCommand changeset(Nodeid revision) throws HgBadArgumentException {
tikhomirov@526: 		try {
tikhomirov@526: 			return changeset(repo.getChangelog().getRevisionIndex(revision));
tikhomirov@526: 		} catch (HgInvalidRevisionException ex) {
tikhomirov@526: 			throw new HgBadArgumentException("Can't find revision", ex).setRevision(revision);
tikhomirov@526: 		}
tikhomirov@526: 	}
tikhomirov@526: 	
tikhomirov@526: 	// TODO keepOriginal() to save .orig
tikhomirov@526: 
tikhomirov@526: 	/**
tikhomirov@526: 	 * Perform the back out for the given files
tikhomirov@526: 	 * 
tikhomirov@526: 	 * @throws HgIOException 
tikhomirov@526: 	 * @throws HgException
tikhomirov@526: 	 * @throws CancelledException
tikhomirov@526: 	 */
tikhomirov@526: 	public void execute() throws HgException, CancelledException {
tikhomirov@526: 		try {
tikhomirov@526: 			final int csetRevision;
tikhomirov@526: 			if (changesetToCheckout == HgRepository.WORKING_COPY) {
tikhomirov@526: 				csetRevision = repo.getChangelog().getRevisionIndex(repo.getWorkingCopyParents().first());
tikhomirov@526: 			} else {
tikhomirov@526: 				csetRevision = changesetToCheckout;
tikhomirov@526: 			}
tikhomirov@526: 			Internals implRepo = Internals.getInstance(repo);
tikhomirov@526: 			final DirstateBuilder dirstateBuilder = new DirstateBuilder(implRepo);
tikhomirov@526: 			dirstateBuilder.fillFrom(new DirstateReader(implRepo, new Path.SimpleSource()));
tikhomirov@526: 			final HgCheckoutCommand.CheckoutWorker worker = new HgCheckoutCommand.CheckoutWorker(implRepo);
tikhomirov@526: 			
tikhomirov@526: 			HgManifest.Inspector insp = new HgManifest.Inspector() {
tikhomirov@526: 				
tikhomirov@526: 				public boolean next(Nodeid nid, Path fname, Flags flags) {
tikhomirov@526: 					if (worker.next(nid, fname, flags)) {
tikhomirov@526: 						dirstateBuilder.recordUncertain(fname);
tikhomirov@526: 						return true;
tikhomirov@526: 					}
tikhomirov@526: 					return false;
tikhomirov@526: 				}
tikhomirov@526: 				
tikhomirov@526: 				public boolean end(int manifestRevision) {
tikhomirov@526: 					return false;
tikhomirov@526: 				}
tikhomirov@526: 				
tikhomirov@526: 				public boolean begin(int mainfestRevision, Nodeid nid, int changelogRevision) {
tikhomirov@526: 					return true;
tikhomirov@526: 				}
tikhomirov@526: 			};
tikhomirov@526: 
tikhomirov@526: 			for (Path file : files) {
tikhomirov@526: 				File f = new File(repo.getWorkingDir(), file.toString());
tikhomirov@526: 				if (f.isFile()) {
tikhomirov@526: 					if (keepOriginal) {
tikhomirov@526: 						File copy = new File(f.getParentFile(), f.getName() + ".orig");
tikhomirov@526: 						if (copy.exists()) {
tikhomirov@526: 							copy.delete();
tikhomirov@526: 						}
tikhomirov@526: 						f.renameTo(copy);
tikhomirov@526: 					} else {
tikhomirov@526: 						f.delete();
tikhomirov@526: 					}
tikhomirov@526: 				}
tikhomirov@526: 				repo.getManifest().walkFileRevisions(file, insp, csetRevision);
tikhomirov@526: 				worker.checkFailed();
tikhomirov@526: 			}
tikhomirov@526: 			dirstateBuilder.serialize();
tikhomirov@526: 		} catch (HgRuntimeException ex) {
tikhomirov@526: 			throw new HgLibraryFailureException(ex);
tikhomirov@526: 		}
tikhomirov@526: 	}
tikhomirov@526: }