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com.google.gerrit.server.git.CommitUtil Maven / Gradle / Ivy
// Copyright (C) 2017 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.server.git;
import static com.google.common.base.MoreObjects.firstNonNull;
import com.google.common.base.Strings;
import com.google.common.flogger.FluentLogger;
import com.google.gerrit.common.Nullable;
import com.google.gerrit.entities.Account;
import com.google.gerrit.entities.Change;
import com.google.gerrit.entities.PatchSet;
import com.google.gerrit.extensions.api.changes.NotifyHandling;
import com.google.gerrit.extensions.api.changes.RevertInput;
import com.google.gerrit.extensions.common.CommitInfo;
import com.google.gerrit.extensions.restapi.ResourceConflictException;
import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
import com.google.gerrit.extensions.restapi.RestApiException;
import com.google.gerrit.server.ChangeMessagesUtil;
import com.google.gerrit.server.CommonConverters;
import com.google.gerrit.server.CurrentUser;
import com.google.gerrit.server.GerritPersonIdent;
import com.google.gerrit.server.ReviewerSet;
import com.google.gerrit.server.approval.ApprovalsUtil;
import com.google.gerrit.server.change.ChangeInserter;
import com.google.gerrit.server.change.ChangeMessages;
import com.google.gerrit.server.change.NotifyResolver;
import com.google.gerrit.server.extensions.events.ChangeReverted;
import com.google.gerrit.server.mail.send.MessageIdGenerator;
import com.google.gerrit.server.mail.send.RevertedSender;
import com.google.gerrit.server.notedb.ChangeNotes;
import com.google.gerrit.server.notedb.ReviewerStateInternal;
import com.google.gerrit.server.notedb.Sequences;
import com.google.gerrit.server.update.BatchUpdate;
import com.google.gerrit.server.update.BatchUpdateOp;
import com.google.gerrit.server.update.ChangeContext;
import com.google.gerrit.server.update.PostUpdateContext;
import com.google.gerrit.server.update.UpdateException;
import com.google.gerrit.server.util.CommitMessageUtil;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import java.io.IOException;
import java.text.MessageFormat;
import java.time.Instant;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.jgit.errors.ConfigInvalidException;
import org.eclipse.jgit.errors.RepositoryNotFoundException;
import org.eclipse.jgit.lib.CommitBuilder;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.ObjectInserter;
import org.eclipse.jgit.lib.ObjectReader;
import org.eclipse.jgit.lib.PersonIdent;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.util.ChangeIdUtil;
/** Static utilities for working with {@link RevCommit}s. */
@Singleton
public class CommitUtil {
private static final FluentLogger logger = FluentLogger.forEnclosingClass();
private final GitRepositoryManager repoManager;
private final Provider serverIdent;
private final Sequences seq;
private final ApprovalsUtil approvalsUtil;
private final ChangeInserter.Factory changeInserterFactory;
private final NotifyResolver notifyResolver;
private final RevertedSender.Factory revertedSenderFactory;
private final ChangeMessagesUtil cmUtil;
private final ChangeReverted changeReverted;
private final BatchUpdate.Factory updateFactory;
private final MessageIdGenerator messageIdGenerator;
@Inject
CommitUtil(
GitRepositoryManager repoManager,
@GerritPersonIdent Provider serverIdent,
Sequences seq,
ApprovalsUtil approvalsUtil,
ChangeInserter.Factory changeInserterFactory,
NotifyResolver notifyResolver,
RevertedSender.Factory revertedSenderFactory,
ChangeMessagesUtil cmUtil,
ChangeReverted changeReverted,
BatchUpdate.Factory updateFactory,
MessageIdGenerator messageIdGenerator) {
this.repoManager = repoManager;
this.serverIdent = serverIdent;
this.seq = seq;
this.approvalsUtil = approvalsUtil;
this.changeInserterFactory = changeInserterFactory;
this.notifyResolver = notifyResolver;
this.revertedSenderFactory = revertedSenderFactory;
this.cmUtil = cmUtil;
this.changeReverted = changeReverted;
this.updateFactory = updateFactory;
this.messageIdGenerator = messageIdGenerator;
}
public static CommitInfo toCommitInfo(RevCommit commit) throws IOException {
return toCommitInfo(commit, null);
}
public static CommitInfo toCommitInfo(RevCommit commit, @Nullable RevWalk walk)
throws IOException {
CommitInfo info = new CommitInfo();
info.commit = commit.getName();
info.author = CommonConverters.toGitPerson(commit.getAuthorIdent());
info.committer = CommonConverters.toGitPerson(commit.getCommitterIdent());
info.subject = commit.getShortMessage();
info.message = commit.getFullMessage();
info.parents = new ArrayList<>(commit.getParentCount());
for (int i = 0; i < commit.getParentCount(); i++) {
RevCommit p = walk == null ? commit.getParent(i) : walk.parseCommit(commit.getParent(i));
CommitInfo parentInfo = new CommitInfo();
parentInfo.commit = p.getName();
parentInfo.subject = p.getShortMessage();
info.parents.add(parentInfo);
}
return info;
}
/**
* Allows creating a revert change.
*
* @param notes ChangeNotes of the change being reverted.
* @param user Current User performing the revert.
* @param input the RevertInput entity for conducting the revert.
* @param timestamp timestamp for the created change.
* @return ObjectId that represents the newly created commit.
*/
public Change.Id createRevertChange(
ChangeNotes notes, CurrentUser user, RevertInput input, Instant timestamp)
throws RestApiException, UpdateException, ConfigInvalidException, IOException {
String message = Strings.emptyToNull(input.message);
try (Repository git = repoManager.openRepository(notes.getProjectName());
ObjectInserter oi = git.newObjectInserter();
ObjectReader reader = oi.newReader();
RevWalk revWalk = new RevWalk(reader)) {
ObjectId generatedChangeId = CommitMessageUtil.generateChangeId();
ObjectId revCommit =
createRevertCommit(message, notes, user, timestamp, oi, revWalk, generatedChangeId);
return createRevertChangeFromCommit(
revCommit, input, notes, user, generatedChangeId, timestamp, oi, revWalk, git);
} catch (RepositoryNotFoundException e) {
throw new ResourceNotFoundException(notes.getChangeId().toString(), e);
}
}
/**
* Wrapper function for creating a revert Commit.
*
* @param message Commit message for the revert commit.
* @param notes ChangeNotes of the change being reverted.
* @param user Current User performing the revert.
* @param ts Timestamp of creation for the commit.
* @return ObjectId that represents the newly created commit.
*/
public ObjectId createRevertCommit(
String message, ChangeNotes notes, CurrentUser user, Instant ts)
throws RestApiException, IOException {
try (Repository git = repoManager.openRepository(notes.getProjectName());
ObjectInserter oi = git.newObjectInserter();
ObjectReader reader = oi.newReader();
RevWalk revWalk = new RevWalk(reader)) {
return createRevertCommit(message, notes, user, ts, oi, revWalk, null);
} catch (RepositoryNotFoundException e) {
throw new ResourceNotFoundException(notes.getProjectName().toString(), e);
}
}
/**
* Creates a revert commit.
*
* @param message Commit message for the revert commit.
* @param notes ChangeNotes of the change being reverted.
* @param user Current User performing the revert.
* @param ts Timestamp of creation for the commit.
* @param oi ObjectInserter for inserting the newly created commit.
* @param revWalk Used for parsing the original commit.
* @param generatedChangeId The changeId for the commit message, can be null since it is not
* needed for commits, only for changes.
* @return ObjectId that represents the newly created commit.
* @throws ResourceConflictException Can't revert the initial commit.
* @throws IOException Thrown in case of I/O errors.
*/
private ObjectId createRevertCommit(
String message,
ChangeNotes notes,
CurrentUser user,
Instant ts,
ObjectInserter oi,
RevWalk revWalk,
@Nullable ObjectId generatedChangeId)
throws ResourceConflictException, IOException {
PatchSet patch = notes.getCurrentPatchSet();
RevCommit commitToRevert = revWalk.parseCommit(patch.commitId());
if (commitToRevert.getParentCount() == 0) {
throw new ResourceConflictException("Cannot revert initial commit");
}
PersonIdent committerIdent = serverIdent.get();
PersonIdent authorIdent =
user.asIdentifiedUser().newCommitterIdent(ts, committerIdent.getTimeZone());
RevCommit parentToCommitToRevert = commitToRevert.getParent(0);
revWalk.parseHeaders(parentToCommitToRevert);
CommitBuilder revertCommitBuilder = new CommitBuilder();
revertCommitBuilder.addParentId(commitToRevert);
revertCommitBuilder.setTreeId(parentToCommitToRevert.getTree());
revertCommitBuilder.setAuthor(authorIdent);
revertCommitBuilder.setCommitter(authorIdent);
Change changeToRevert = notes.getChange();
String subject = changeToRevert.getSubject();
if (subject.length() > 63) {
subject = subject.substring(0, 59) + "...";
}
if (message == null) {
message =
MessageFormat.format(
ChangeMessages.get().revertChangeDefaultMessage, subject, patch.commitId().name());
}
if (generatedChangeId != null) {
revertCommitBuilder.setMessage(ChangeIdUtil.insertId(message, generatedChangeId, true));
}
ObjectId id = oi.insert(revertCommitBuilder);
oi.flush();
return id;
}
private Change.Id createRevertChangeFromCommit(
ObjectId revertCommitId,
RevertInput input,
ChangeNotes notes,
CurrentUser user,
@Nullable ObjectId generatedChangeId,
Instant ts,
ObjectInserter oi,
RevWalk revWalk,
Repository git)
throws IOException, RestApiException, UpdateException, ConfigInvalidException {
RevCommit revertCommit = revWalk.parseCommit(revertCommitId);
Change changeToRevert = notes.getChange();
Change.Id changeId = Change.id(seq.nextChangeId());
if (input.workInProgress) {
input.notify = firstNonNull(input.notify, NotifyHandling.OWNER);
}
NotifyResolver.Result notify =
notifyResolver.resolve(firstNonNull(input.notify, NotifyHandling.ALL), input.notifyDetails);
ChangeInserter ins =
changeInserterFactory
.create(changeId, revertCommit, notes.getChange().getDest().branch())
.setTopic(input.topic == null ? changeToRevert.getTopic() : input.topic.trim());
ins.setMessage("Uploaded patch set 1.");
ReviewerSet reviewerSet = approvalsUtil.getReviewers(notes);
Set reviewers = new HashSet<>();
reviewers.add(changeToRevert.getOwner());
reviewers.addAll(reviewerSet.byState(ReviewerStateInternal.REVIEWER));
reviewers.remove(user.getAccountId());
Set ccs = new HashSet<>(reviewerSet.byState(ReviewerStateInternal.CC));
ccs.remove(user.getAccountId());
ins.setReviewersAndCcs(reviewers, ccs);
ins.setRevertOf(notes.getChangeId());
ins.setWorkInProgress(input.workInProgress);
try (BatchUpdate bu = updateFactory.create(notes.getProjectName(), user, ts)) {
bu.setRepository(git, revWalk, oi);
bu.setNotify(notify);
bu.insertChange(ins);
bu.addOp(changeId, new NotifyOp(changeToRevert, ins));
bu.addOp(changeToRevert.getId(), new PostRevertedMessageOp(generatedChangeId));
bu.execute();
}
return changeId;
}
private class NotifyOp implements BatchUpdateOp {
private final Change change;
private final ChangeInserter ins;
NotifyOp(Change change, ChangeInserter ins) {
this.change = change;
this.ins = ins;
}
@Override
public void postUpdate(PostUpdateContext ctx) throws Exception {
changeReverted.fire(
ctx.getChangeData(change), ctx.getChangeData(ins.getChange()), ctx.getWhen());
try {
RevertedSender emailSender = revertedSenderFactory.create(ctx.getProject(), change.getId());
emailSender.setFrom(ctx.getAccountId());
emailSender.setNotify(ctx.getNotify(change.getId()));
emailSender.setMessageId(
messageIdGenerator.fromChangeUpdate(ctx.getRepoView(), change.currentPatchSetId()));
emailSender.send();
} catch (Exception err) {
logger.atSevere().withCause(err).log(
"Cannot send email for revert change %s", change.getId());
}
}
}
private class PostRevertedMessageOp implements BatchUpdateOp {
private final ObjectId computedChangeId;
PostRevertedMessageOp(ObjectId computedChangeId) {
this.computedChangeId = computedChangeId;
}
@Override
public boolean updateChange(ChangeContext ctx) {
cmUtil.setChangeMessage(
ctx,
"Created a revert of this change as I" + computedChangeId.name(),
ChangeMessagesUtil.TAG_REVERT);
return true;
}
}
}
