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/*******************************************************************************
* Copyright (C) 2007, Dave Watson <dwatson@mimvista.com>
* Copyright (C) 2008, Robin Rosenberg <robin.rosenberg@dewire.com>
* Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
*
* 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
*******************************************************************************/
package org.eclipse.egit.core.op;
import java.io.File;
import java.io.IOException;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IWorkspaceRunnable;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.egit.core.CoreText;
import org.eclipse.jgit.lib.Commit;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.GitIndex;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.RefUpdate;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.lib.Tag;
import org.eclipse.jgit.lib.Tree;
import org.eclipse.jgit.lib.WorkDirCheckout;
import org.eclipse.osgi.util.NLS;
import org.eclipse.team.core.TeamException;
/**
* A class for changing a ref and possibly index and workdir too.
*/
public class ResetOperation implements IWorkspaceRunnable {
/**
* Kind of reset
*/
public enum ResetType {
/**
* Just change the ref. The index and workdir are not changed.
*/
SOFT,
/**
* Change the ref and the index. The workdir is not changed.
*/
MIXED,
/**
* Change the ref, the index and the workdir
*/
HARD
}
private final Repository repository;
private final String refName;
private final ResetType type;
private Commit commit;
private Tree newTree;
private GitIndex index;
/**
* Construct a {@link ResetOperation}
*
* @param repository
* @param refName
* @param type
*/
public ResetOperation(Repository repository, String refName, ResetType type) {
this.repository = repository;
this.refName = refName;
this.type = type;
}
public void run(IProgressMonitor monitor) throws CoreException {
monitor.beginTask(NLS.bind(CoreText.ResetOperation_performingReset,
type.toString().toLowerCase(), refName), 7);
mapObjects();
monitor.worked(1);
writeRef();
monitor.worked(1);
if (type != ResetType.SOFT) {
if (type == ResetType.MIXED)
resetIndex();
else
readIndex();
writeIndex();
}
monitor.worked(1);
if (type == ResetType.HARD) {
checkoutIndex();
}
monitor.worked(1);
if (type != ResetType.SOFT) {
refreshIndex();
}
monitor.worked(1);
monitor.worked(1);
refreshProjects();
monitor.done();
}
private void refreshIndex() throws TeamException {
// File workdir = repository.getDirectory().getParentFile();
// for (Entry e : newIndex.getMembers()) {
// try {
// e.update(new File(workdir, e.getName()));
// } catch (IOException ignore) {}
// }
try {
index.write();
} catch (IOException e1) {
throw new TeamException(CoreText.ResetOperation_writingIndex, e1);
}
}
private void refreshProjects() {
final IProject[] projects = ResourcesPlugin.getWorkspace().getRoot().getProjects();
final File parentFile = repository.getWorkDir();
for (IProject p : projects) {
final File file = p.getLocation().toFile();
if (file.getAbsolutePath().startsWith(parentFile.getAbsolutePath())) {
try {
System.out.println("Refreshing " + p); //$NON-NLS-1$
p.refreshLocal(IResource.DEPTH_INFINITE, null);
} catch (CoreException e) {
e.printStackTrace();
}
}
}
}
private void mapObjects() throws TeamException {
final ObjectId commitId;
try {
commitId = repository.resolve(refName);
} catch (IOException e) {
throw new TeamException(NLS.bind(
CoreText.ResetOperation_lookingUpRef, refName), e);
}
try {
commit = repository.mapCommit(commitId);
} catch (IOException e) {
try {
Tag t = repository.mapTag(refName, commitId);
commit = repository.mapCommit(t.getObjId());
} catch (IOException e2) {
throw new TeamException(NLS.bind(
CoreText.ResetOperation_lookingUpCommit, commitId), e2);
}
}
}
private void writeRef() throws TeamException {
try {
final RefUpdate ru = repository.updateRef(Constants.HEAD);
ru.setNewObjectId(commit.getCommitId());
String name = refName;
if (name.startsWith("refs/heads/")) //$NON-NLS-1$
name = name.substring(11);
if (name.startsWith("refs/remotes/")) //$NON-NLS-1$
name = name.substring(13);
String message = "reset --" //$NON-NLS-1$
+ type.toString().toLowerCase() + " " + name; //$NON-NLS-1$
ru.setRefLogMessage(message, false);
if (ru.forceUpdate() == RefUpdate.Result.LOCK_FAILURE)
throw new TeamException(NLS.bind(
CoreText.ResetOperation_cantUpdate, ru.getName()));
} catch (IOException e) {
throw new TeamException(NLS.bind(
CoreText.ResetOperation_updatingFailed, Constants.HEAD), e);
}
}
private void readIndex() throws TeamException {
try {
newTree = commit.getTree();
index = repository.getIndex();
} catch (IOException e) {
throw new TeamException(CoreText.ResetOperation_readingIndex, e);
}
}
private void resetIndex() throws TeamException {
try {
newTree = commit.getTree();
index = repository.getIndex();
index.readTree(newTree);
} catch (IOException e) {
throw new TeamException(CoreText.ResetOperation_readingIndex, e);
}
}
private void writeIndex() throws CoreException {
try {
index.write();
} catch (IOException e) {
throw new TeamException(CoreText.ResetOperation_writingIndex, e);
}
}
private void checkoutIndex() throws TeamException {
final File parentFile = repository.getWorkDir();
try {
WorkDirCheckout workDirCheckout =
new WorkDirCheckout(repository, parentFile, index, newTree);
workDirCheckout.setFailOnConflict(false);
workDirCheckout.checkout();
} catch (IOException e) {
throw new TeamException(
CoreText.ResetOperation_mappingTreeForCommit, e);
}
}
}
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