org.eclipse.jgit.api.CherryPickCommand Maven / Gradle / Ivy
/*
* Copyright (C) 2010, Christian Halstrick
* 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
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package org.eclipse.jgit.api;
import java.io.IOException;
import java.text.MessageFormat;
import java.util.LinkedList;
import java.util.List;
import org.eclipse.jgit.api.errors.ConcurrentRefUpdateException;
import org.eclipse.jgit.api.errors.GitAPIException;
import org.eclipse.jgit.api.errors.JGitInternalException;
import org.eclipse.jgit.api.errors.MultipleParentsNotAllowedException;
import org.eclipse.jgit.api.errors.NoHeadException;
import org.eclipse.jgit.api.errors.NoMessageException;
import org.eclipse.jgit.api.errors.UnmergedPathsException;
import org.eclipse.jgit.api.errors.WrongRepositoryStateException;
import org.eclipse.jgit.dircache.DirCacheCheckout;
import org.eclipse.jgit.internal.JGitText;
import org.eclipse.jgit.lib.AnyObjectId;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectIdRef;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.Ref.Storage;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.merge.MergeMessageFormatter;
import org.eclipse.jgit.merge.MergeStrategy;
import org.eclipse.jgit.merge.ResolveMerger;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.treewalk.FileTreeIterator;
/**
* A class used to execute a {@code cherry-pick} command. It has setters for all
* supported options and arguments of this command and a {@link #call()} method
* to finally execute the command. Each instance of this class should only be
* used for one invocation of the command (means: one call to {@link #call()})
*
* @see Git documentation about cherry-pick
*/
public class CherryPickCommand extends GitCommand {
private List commits = new LinkedList();
/**
* @param repo
*/
protected CherryPickCommand(Repository repo) {
super(repo);
}
/**
* Executes the {@code Cherry-Pick} command with all the options and
* parameters collected by the setter methods (e.g. {@link #include(Ref)} of
* this class. Each instance of this class should only be used for one
* invocation of the command. Don't call this method twice on an instance.
*
* @return the result of the cherry-pick
* @throws GitAPIException
* @throws WrongRepositoryStateException
* @throws ConcurrentRefUpdateException
* @throws UnmergedPathsException
* @throws NoMessageException
* @throws NoHeadException
*/
public CherryPickResult call() throws GitAPIException, NoMessageException,
UnmergedPathsException, ConcurrentRefUpdateException,
WrongRepositoryStateException, NoHeadException {
RevCommit newHead = null;
List cherryPickedRefs = new LinkedList();
checkCallable();
RevWalk revWalk = new RevWalk(repo);
try {
// get the head commit
Ref headRef = repo.getRef(Constants.HEAD);
if (headRef == null)
throw new NoHeadException(
JGitText.get().commitOnRepoWithoutHEADCurrentlyNotSupported);
RevCommit headCommit = revWalk.parseCommit(headRef.getObjectId());
newHead = headCommit;
// loop through all refs to be cherry-picked
for (Ref src : commits) {
// get the commit to be cherry-picked
// handle annotated tags
ObjectId srcObjectId = src.getPeeledObjectId();
if (srcObjectId == null)
srcObjectId = src.getObjectId();
RevCommit srcCommit = revWalk.parseCommit(srcObjectId);
// get the parent of the commit to cherry-pick
if (srcCommit.getParentCount() != 1)
throw new MultipleParentsNotAllowedException(
MessageFormat.format(
JGitText.get().canOnlyCherryPickCommitsWithOneParent,
srcCommit.name(),
Integer.valueOf(srcCommit.getParentCount())));
RevCommit srcParent = srcCommit.getParent(0);
revWalk.parseHeaders(srcParent);
ResolveMerger merger = (ResolveMerger) MergeStrategy.RESOLVE
.newMerger(repo);
merger.setWorkingTreeIterator(new FileTreeIterator(repo));
merger.setBase(srcParent.getTree());
if (merger.merge(headCommit, srcCommit)) {
if (AnyObjectId.equals(headCommit.getTree().getId(), merger
.getResultTreeId()))
continue;
DirCacheCheckout dco = new DirCacheCheckout(repo,
headCommit.getTree(), repo.lockDirCache(),
merger.getResultTreeId());
dco.setFailOnConflict(true);
dco.checkout();
newHead = new Git(getRepository()).commit()
.setMessage(srcCommit.getFullMessage())
.setReflogComment(
"cherry-pick: "
+ srcCommit.getShortMessage())
.setAuthor(srcCommit.getAuthorIdent()).call();
cherryPickedRefs.add(src);
} else {
if (merger.failed())
return new CherryPickResult(merger.getFailingPaths());
// there are merge conflicts
String message = new MergeMessageFormatter()
.formatWithConflicts(srcCommit.getFullMessage(),
merger.getUnmergedPaths());
repo.writeCherryPickHead(srcCommit.getId());
repo.writeMergeCommitMsg(message);
return CherryPickResult.CONFLICT;
}
}
} catch (IOException e) {
throw new JGitInternalException(
MessageFormat.format(
JGitText.get().exceptionCaughtDuringExecutionOfCherryPickCommand,
e), e);
} finally {
revWalk.release();
}
return new CherryPickResult(newHead, cherryPickedRefs);
}
/**
* @param commit
* a reference to a commit which is cherry-picked to the current
* head
* @return {@code this}
*/
public CherryPickCommand include(Ref commit) {
checkCallable();
commits.add(commit);
return this;
}
/**
* @param commit
* the Id of a commit which is cherry-picked to the current head
* @return {@code this}
*/
public CherryPickCommand include(AnyObjectId commit) {
return include(commit.getName(), commit);
}
/**
* @param name
* a name given to the commit
* @param commit
* the Id of a commit which is cherry-picked to the current head
* @return {@code this}
*/
public CherryPickCommand include(String name, AnyObjectId commit) {
return include(new ObjectIdRef.Unpeeled(Storage.LOOSE, name,
commit.copy()));
}
}
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