/*
* Copyright (C) 2011, GitHub Inc.
* and other copyright owners as documented in the project's IP log.
*
* This program and the accompanying materials are made available
* under the terms of the Eclipse Distribution License v1.0 which
* accompanies this distribution, is reproduced below, and is
* available at http://www.eclipse.org/org/documents/edl-v10.php
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package org.eclipse.jgit.api;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.eclipse.jgit.api.errors.CheckoutConflictException;
import org.eclipse.jgit.api.errors.ConcurrentRefUpdateException;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.api.errors.InvalidConfigurationException;
import org.eclipse.jgit.api.errors.InvalidMergeHeadsException;
import org.eclipse.jgit.api.errors.JGitInternalException;
import org.eclipse.jgit.api.errors.NoHeadException;
import org.eclipse.jgit.api.errors.NoMessageException;
import org.eclipse.jgit.api.errors.RefNotFoundException;
import org.eclipse.jgit.api.errors.WrongRepositoryStateException;
import org.eclipse.jgit.dircache.DirCacheCheckout;
import org.eclipse.jgit.errors.ConfigInvalidException;
import org.eclipse.jgit.lib.ConfigConstants;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.NullProgressMonitor;
import org.eclipse.jgit.lib.ProgressMonitor;
import org.eclipse.jgit.lib.RefUpdate;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.merge.MergeStrategy;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.submodule.SubmoduleWalk;
import org.eclipse.jgit.treewalk.filter.PathFilterGroup;
/**
* A class used to execute a submodule update command.
*
* @see <a
* href="http://www.kernel.org/pub/software/scm/git/docs/git-submodule.html"
* >Git documentation about submodules</a>
*/
public class SubmoduleUpdateCommand extends
TransportCommand<SubmoduleUpdateCommand, Collection<String>> {
private ProgressMonitor monitor;
private final Collection<String> paths;
private MergeStrategy strategy = MergeStrategy.RECURSIVE;
/**
* @param repo
*/
public SubmoduleUpdateCommand(final Repository repo) {
super(repo);
paths = new ArrayList<String>();
}
/**
* The progress monitor associated with the clone operation. By default,
* this is set to <code>NullProgressMonitor</code>
*
* @see NullProgressMonitor
* @param monitor
* @return this command
*/
public SubmoduleUpdateCommand setProgressMonitor(
final ProgressMonitor monitor) {
this.monitor = monitor;
return this;
}
/**
* Add repository-relative submodule path to initialize
*
* @param path
* (with <code>/</code> as separator)
* @return this command
*/
public SubmoduleUpdateCommand addPath(final String path) {
paths.add(path);
return this;
}
/**
* Execute the SubmoduleUpdateCommand command.
*
* @return a collection of updated submodule paths
* @throws ConcurrentRefUpdateException
* @throws CheckoutConflictException
* @throws InvalidMergeHeadsException
* @throws InvalidConfigurationException
* @throws NoHeadException
* @throws NoMessageException
* @throws RefNotFoundException
* @throws WrongRepositoryStateException
* @throws GitAPIException
*/
public Collection<String> call() throws InvalidConfigurationException,
NoHeadException, ConcurrentRefUpdateException,
CheckoutConflictException, InvalidMergeHeadsException,
WrongRepositoryStateException, NoMessageException, NoHeadException,
RefNotFoundException, GitAPIException {
checkCallable();
try {
SubmoduleWalk generator = SubmoduleWalk.forIndex(repo);
if (!paths.isEmpty())
generator.setFilter(PathFilterGroup.createFromStrings(paths));
List<String> updated = new ArrayList<String>();
while (generator.next()) {
// Skip submodules not registered in .gitmodules file
if (generator.getModulesPath() == null)
continue;
// Skip submodules not registered in parent repository's config
String url = generator.getConfigUrl();
if (url == null)
continue;
Repository submoduleRepo = generator.getRepository();
// Clone repository is not present
if (submoduleRepo == null) {
CloneCommand clone = Git.cloneRepository();
configure(clone);
clone.setURI(url);
clone.setDirectory(generator.getDirectory());
if (monitor != null)
clone.setProgressMonitor(monitor);
submoduleRepo = clone.call().getRepository();
}
try {
RevWalk walk = new RevWalk(submoduleRepo);
RevCommit commit = walk
.parseCommit(generator.getObjectId());
String update = generator.getConfigUpdate();
if (ConfigConstants.CONFIG_KEY_MERGE.equals(update)) {
MergeCommand merge = new MergeCommand(submoduleRepo);
merge.include(commit);
merge.setStrategy(strategy);
merge.call();
} else if (ConfigConstants.CONFIG_KEY_REBASE.equals(update)) {
RebaseCommand rebase = new RebaseCommand(submoduleRepo);
rebase.setUpstream(commit);
rebase.setStrategy(strategy);
rebase.call();
} else {
// Checkout commit referenced in parent repository's
// index as a detached HEAD
DirCacheCheckout co = new DirCacheCheckout(
submoduleRepo, submoduleRepo.lockDirCache(),
commit.getTree());
co.setFailOnConflict(true);
co.checkout();
RefUpdate refUpdate = submoduleRepo.updateRef(
Constants.HEAD, true);
refUpdate.setNewObjectId(commit);
refUpdate.forceUpdate();
}
} finally {
submoduleRepo.close();
}
updated.add(generator.getPath());
}
return updated;
} catch (IOException e) {
throw new JGitInternalException(e.getMessage(), e);
} catch (ConfigInvalidException e) {
throw new InvalidConfigurationException(e.getMessage(), e);
}
}
/**
* @param strategy
* The merge strategy to use during this update operation.
* @return {@code this}
* @since 3.4
*/
public SubmoduleUpdateCommand setStrategy(MergeStrategy strategy) {
this.strategy = strategy;
return this;
}
}