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gerrit / gerrit / bc33b58b0f86e65c9731f25ecf48917bddb58c05 / . / java / com / google / gerrit / server / git / receive / ReceiveCommits.java
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// Copyright (C) 2008 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.receive;
import static com.google.common.base.MoreObjects.firstNonNull;
import static com.google.common.base.Preconditions.checkState;
import static com.google.common.collect.ImmutableList.toImmutableList;
import static com.google.common.collect.ImmutableListMultimap.toImmutableListMultimap;
import static com.google.common.collect.ImmutableSet.toImmutableSet;
import static com.google.common.flogger.LazyArgs.lazy;
import static com.google.gerrit.entities.RefNames.REFS_CHANGES;
import static com.google.gerrit.entities.RefNames.isConfigRef;
import static com.google.gerrit.entities.RefNames.isRefsUsersSelf;
import static com.google.gerrit.git.ObjectIds.abbreviateName;
import static com.google.gerrit.server.change.HashtagsUtil.cleanupHashtag;
import static com.google.gerrit.server.git.MultiProgressMonitor.UNKNOWN;
import static com.google.gerrit.server.git.receive.ReceiveConstants.COMMAND_REJECTION_MESSAGE_FOOTER;
import static com.google.gerrit.server.git.receive.ReceiveConstants.ONLY_USERS_WITH_TOGGLE_WIP_STATE_PERM_CAN_MODIFY_WIP;
import static com.google.gerrit.server.git.receive.ReceiveConstants.PUSH_OPTION_SKIP_VALIDATION;
import static com.google.gerrit.server.git.receive.ReceiveConstants.SAME_CHANGE_ID_IN_MULTIPLE_CHANGES;
import static com.google.gerrit.server.git.validators.CommitValidators.NEW_PATCHSET_PATTERN;
import static com.google.gerrit.server.mail.MailUtil.getRecipientsFromFooters;
import static com.google.gerrit.server.project.ProjectCache.illegalState;
import static java.nio.charset.StandardCharsets.UTF_8;
import static java.util.Objects.requireNonNull;
import static java.util.stream.Collectors.joining;
import static java.util.stream.Collectors.toList;
import static org.eclipse.jgit.lib.Constants.R_HEADS;
import static org.eclipse.jgit.transport.ReceiveCommand.Result.NOT_ATTEMPTED;
import static org.eclipse.jgit.transport.ReceiveCommand.Result.OK;
import static org.eclipse.jgit.transport.ReceiveCommand.Result.REJECTED_MISSING_OBJECT;
import static org.eclipse.jgit.transport.ReceiveCommand.Result.REJECTED_OTHER_REASON;
import com.google.common.base.Joiner;
import com.google.common.base.Splitter;
import com.google.common.base.Strings;
import com.google.common.collect.BiMap;
import com.google.common.collect.HashBiMap;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableListMultimap;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.ImmutableSetMultimap;
import com.google.common.collect.Iterables;
import com.google.common.collect.LinkedListMultimap;
import com.google.common.collect.ListMultimap;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.collect.MultimapBuilder;
import com.google.common.collect.Sets;
import com.google.common.collect.SortedSetMultimap;
import com.google.common.collect.Streams;
import com.google.common.flogger.FluentLogger;
import com.google.gerrit.common.Nullable;
import com.google.gerrit.common.UsedAt;
import com.google.gerrit.entities.Account;
import com.google.gerrit.entities.BooleanProjectConfig;
import com.google.gerrit.entities.BranchNameKey;
import com.google.gerrit.entities.Change;
import com.google.gerrit.entities.HumanComment;
import com.google.gerrit.entities.LabelType;
import com.google.gerrit.entities.LabelTypes;
import com.google.gerrit.entities.PatchSet;
import com.google.gerrit.entities.PatchSetInfo;
import com.google.gerrit.entities.Project;
import com.google.gerrit.entities.RefNames;
import com.google.gerrit.entities.SubmissionId;
import com.google.gerrit.exceptions.StorageException;
import com.google.gerrit.extensions.api.changes.HashtagsInput;
import com.google.gerrit.extensions.api.changes.NotifyHandling;
import com.google.gerrit.extensions.api.changes.NotifyInfo;
import com.google.gerrit.extensions.api.changes.RecipientType;
import com.google.gerrit.extensions.api.changes.SubmitInput;
import com.google.gerrit.extensions.api.projects.ProjectConfigEntryType;
import com.google.gerrit.extensions.client.GeneralPreferencesInfo;
import com.google.gerrit.extensions.registration.DynamicItem;
import com.google.gerrit.extensions.registration.DynamicMap;
import com.google.gerrit.extensions.registration.DynamicSet;
import com.google.gerrit.extensions.registration.Extension;
import com.google.gerrit.extensions.restapi.AuthException;
import com.google.gerrit.extensions.restapi.BadRequestException;
import com.google.gerrit.extensions.restapi.ResourceConflictException;
import com.google.gerrit.extensions.restapi.RestApiException;
import com.google.gerrit.extensions.restapi.UnprocessableEntityException;
import com.google.gerrit.extensions.validators.CommentForValidation;
import com.google.gerrit.extensions.validators.CommentForValidation.CommentSource;
import com.google.gerrit.extensions.validators.CommentForValidation.CommentType;
import com.google.gerrit.extensions.validators.CommentValidationContext;
import com.google.gerrit.extensions.validators.CommentValidationFailure;
import com.google.gerrit.extensions.validators.CommentValidator;
import com.google.gerrit.server.ApprovalsUtil;
import com.google.gerrit.server.ChangeUtil;
import com.google.gerrit.server.CommentsUtil;
import com.google.gerrit.server.CreateGroupPermissionSyncer;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.PatchSetUtil;
import com.google.gerrit.server.PublishCommentUtil;
import com.google.gerrit.server.PublishCommentsOp;
import com.google.gerrit.server.RequestInfo;
import com.google.gerrit.server.RequestListener;
import com.google.gerrit.server.account.AccountResolver;
import com.google.gerrit.server.change.ChangeInserter;
import com.google.gerrit.server.change.NotifyResolver;
import com.google.gerrit.server.change.SetHashtagsOp;
import com.google.gerrit.server.change.SetPrivateOp;
import com.google.gerrit.server.change.SetTopicOp;
import com.google.gerrit.server.config.AllProjectsName;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.gerrit.server.config.PluginConfig;
import com.google.gerrit.server.config.ProjectConfigEntry;
import com.google.gerrit.server.config.UrlFormatter;
import com.google.gerrit.server.edit.ChangeEdit;
import com.google.gerrit.server.edit.ChangeEditUtil;
import com.google.gerrit.server.git.BanCommit;
import com.google.gerrit.server.git.ChangeReportFormatter;
import com.google.gerrit.server.git.GroupCollector;
import com.google.gerrit.server.git.MergedByPushOp;
import com.google.gerrit.server.git.MultiProgressMonitor;
import com.google.gerrit.server.git.MultiProgressMonitor.Task;
import com.google.gerrit.server.git.ReceivePackInitializer;
import com.google.gerrit.server.git.TagCache;
import com.google.gerrit.server.git.ValidationError;
import com.google.gerrit.server.git.validators.CommentCountValidator;
import com.google.gerrit.server.git.validators.CommentSizeValidator;
import com.google.gerrit.server.git.validators.CommitValidationMessage;
import com.google.gerrit.server.git.validators.RefOperationValidationException;
import com.google.gerrit.server.git.validators.RefOperationValidators;
import com.google.gerrit.server.git.validators.ValidationMessage;
import com.google.gerrit.server.index.change.ChangeIndexer;
import com.google.gerrit.server.logging.Metadata;
import com.google.gerrit.server.logging.PerformanceLogContext;
import com.google.gerrit.server.logging.PerformanceLogger;
import com.google.gerrit.server.logging.RequestId;
import com.google.gerrit.server.logging.TraceContext;
import com.google.gerrit.server.logging.TraceContext.TraceTimer;
import com.google.gerrit.server.mail.MailUtil.MailRecipients;
import com.google.gerrit.server.notedb.ChangeNotes;
import com.google.gerrit.server.notedb.Sequences;
import com.google.gerrit.server.patch.AutoMerger;
import com.google.gerrit.server.patch.PatchSetInfoFactory;
import com.google.gerrit.server.permissions.ChangePermission;
import com.google.gerrit.server.permissions.GlobalPermission;
import com.google.gerrit.server.permissions.PermissionBackend;
import com.google.gerrit.server.permissions.PermissionBackendException;
import com.google.gerrit.server.permissions.PermissionDeniedException;
import com.google.gerrit.server.permissions.ProjectPermission;
import com.google.gerrit.server.permissions.RefPermission;
import com.google.gerrit.server.plugincontext.PluginSetContext;
import com.google.gerrit.server.project.CreateRefControl;
import com.google.gerrit.server.project.NoSuchChangeException;
import com.google.gerrit.server.project.NoSuchProjectException;
import com.google.gerrit.server.project.ProjectCache;
import com.google.gerrit.server.project.ProjectConfig;
import com.google.gerrit.server.project.ProjectState;
import com.google.gerrit.server.query.change.ChangeData;
import com.google.gerrit.server.query.change.InternalChangeQuery;
import com.google.gerrit.server.restapi.change.ReplyAttentionSetUpdates;
import com.google.gerrit.server.submit.MergeOp;
import com.google.gerrit.server.submit.MergeOpRepoManager;
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.RepoContext;
import com.google.gerrit.server.update.RepoOnlyOp;
import com.google.gerrit.server.update.RetryHelper;
import com.google.gerrit.server.update.SubmissionExecutor;
import com.google.gerrit.server.update.SubmissionListener;
import com.google.gerrit.server.update.SuperprojectUpdateOnSubmission;
import com.google.gerrit.server.update.UpdateException;
import com.google.gerrit.server.util.LabelVote;
import com.google.gerrit.server.util.MagicBranch;
import com.google.gerrit.server.util.RequestScopePropagator;
import com.google.gerrit.server.util.time.TimeUtil;
import com.google.gerrit.util.cli.CmdLineParser;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.assistedinject.Assisted;
import com.google.inject.util.Providers;
import java.io.IOException;
import java.io.StringWriter;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import java.util.Queue;
import java.util.Set;
import java.util.TreeSet;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;
import org.eclipse.jgit.errors.ConfigInvalidException;
import org.eclipse.jgit.errors.IncorrectObjectTypeException;
import org.eclipse.jgit.errors.MissingObjectException;
import org.eclipse.jgit.lib.Config;
import org.eclipse.jgit.lib.Constants;
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.Ref;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.notes.NoteMap;
import org.eclipse.jgit.revwalk.FooterLine;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevObject;
import org.eclipse.jgit.revwalk.RevSort;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.revwalk.filter.RevFilter;
import org.eclipse.jgit.transport.ReceiveCommand;
import org.eclipse.jgit.transport.ReceivePack;
import org.kohsuke.args4j.CmdLineException;
import org.kohsuke.args4j.Option;
/**
* Receives change upload using the Git receive-pack protocol.
*
* <p>Conceptually, most use of Gerrit is a push of some commits to refs/for/BRANCH. However, the
* receive-pack protocol that this is based on allows multiple ref updates to be processed at once.
* So we have to be prepared to also handle normal pushes (refs/heads/BRANCH), and legacy pushes
* (refs/changes/CHANGE). It is hard to split this class up further, because normal pushes can also
* result in updates to reviews, through the autoclose mechanism.
*/
class ReceiveCommits {
private static final FluentLogger logger = FluentLogger.forEnclosingClass();
private static final String CANNOT_DELETE_CHANGES = "Cannot delete from '" + REFS_CHANGES + "'";
private static final String CANNOT_DELETE_CONFIG =
"Cannot delete project configuration from '" + RefNames.REFS_CONFIG + "'";
private static final String INTERNAL_SERVER_ERROR = "internal server error";
interface Factory {
ReceiveCommits create(
ProjectState projectState,
IdentifiedUser user,
ReceivePack receivePack,
Repository repository,
AllRefsWatcher allRefsWatcher,
MessageSender messageSender);
}
private class ReceivePackMessageSender implements MessageSender {
@Override
public void sendMessage(String what) {
receivePack.sendMessage(what);
}
@Override
public void sendError(String what) {
receivePack.sendError(what);
}
@Override
public void sendBytes(byte[] what) {
sendBytes(what, 0, what.length);
}
@Override
public void sendBytes(byte[] what, int off, int len) {
try {
receivePack.getMessageOutputStream().write(what, off, len);
} catch (IOException e) {
// Ignore write failures (matching JGit behavior).
}
}
@Override
public void flush() {
try {
receivePack.getMessageOutputStream().flush();
} catch (IOException e) {
// Ignore write failures (matching JGit behavior).
}
}
}
private static RestApiException asRestApiException(Exception e) {
if (e instanceof RestApiException) {
return (RestApiException) e;
} else if ((e instanceof ExecutionException) && (e.getCause() instanceof RestApiException)) {
return (RestApiException) e.getCause();
}
return RestApiException.wrap("Error inserting change/patchset", e);
}
// ReceiveCommits has a lot of fields, sorry. Here and in the constructor they are split up
// somewhat, and kept sorted lexicographically within sections, except where later assignments
// depend on previous ones.
// Injected fields.
private final AccountResolver accountResolver;
private final AllProjectsName allProjectsName;
private final BatchUpdate.Factory batchUpdateFactory;
private final ChangeEditUtil editUtil;
private final ChangeIndexer indexer;
private final ChangeInserter.Factory changeInserterFactory;
private final ChangeNotes.Factory notesFactory;
private final ChangeReportFormatter changeFormatter;
private final CmdLineParser.Factory optionParserFactory;
private final CommentsUtil commentsUtil;
private final PluginSetContext<CommentValidator> commentValidators;
private final BranchCommitValidator.Factory commitValidatorFactory;
private final Config config;
private final CreateGroupPermissionSyncer createGroupPermissionSyncer;
private final CreateRefControl createRefControl;
private final DynamicMap<ProjectConfigEntry> pluginConfigEntries;
private final DynamicSet<PluginPushOption> pluginPushOptions;
private final PluginSetContext<ReceivePackInitializer> initializers;
private final MergedByPushOp.Factory mergedByPushOpFactory;
private final PatchSetInfoFactory patchSetInfoFactory;
private final PatchSetUtil psUtil;
private final DynamicSet<PerformanceLogger> performanceLoggers;
private final PermissionBackend permissionBackend;
private final ProjectCache projectCache;
private final Provider<InternalChangeQuery> queryProvider;
private final Provider<MergeOp> mergeOpProvider;
private final Provider<MergeOpRepoManager> ormProvider;
private final ReceiveConfig receiveConfig;
private final RefOperationValidators.Factory refValidatorsFactory;
private final ReplaceOp.Factory replaceOpFactory;
private final PluginSetContext<RequestListener> requestListeners;
private final PublishCommentsOp.Factory publishCommentsOp;
private final RetryHelper retryHelper;
private final RequestScopePropagator requestScopePropagator;
private final Sequences seq;
private final SetHashtagsOp.Factory hashtagsFactory;
private final SetTopicOp.Factory setTopicFactory;
private final ImmutableList<SubmissionListener> superprojectUpdateSubmissionListeners;
private final TagCache tagCache;
private final ProjectConfig.Factory projectConfigFactory;
private final SetPrivateOp.Factory setPrivateOpFactory;
private final ReplyAttentionSetUpdates replyAttentionSetUpdates;
private final DynamicItem<UrlFormatter> urlFormatter;
private final AutoMerger autoMerger;
// Assisted injected fields.
private final ProjectState projectState;
private final IdentifiedUser user;
private final ReceivePack receivePack;
// Immutable fields derived from constructor arguments.
private final boolean allowProjectOwnersToChangeParent;
private final LabelTypes labelTypes;
private final NoteMap rejectCommits;
private final PermissionBackend.ForProject permissions;
private final Project project;
private final Repository repo;
// Collections populated during processing.
private final List<UpdateGroupsRequest> updateGroups;
private final Queue<ValidationMessage> messages;
/** Multimap of error text to refnames that produced that error. */
private final ListMultimap<String, String> errors;
private final ListMultimap<String, String> pushOptions;
private final ReceivePackRefCache receivePackRefCache;
private final Map<Change.Id, ReplaceRequest> replaceByChange;
// Other settings populated during processing.
private MagicBranchInput magicBranch;
private boolean newChangeForAllNotInTarget;
private boolean setChangeAsPrivate;
private Optional<NoteDbPushOption> noteDbPushOption;
private Optional<String> tracePushOption;
private MessageSender messageSender;
private ReceiveCommitsResult.Builder result;
private ImmutableMap<String, String> loggingTags;
/** This object is for single use only. */
private boolean used;
@Inject
ReceiveCommits(
AccountResolver accountResolver,
AllProjectsName allProjectsName,
BatchUpdate.Factory batchUpdateFactory,
ProjectConfig.Factory projectConfigFactory,
@GerritServerConfig Config config,
ChangeEditUtil editUtil,
ChangeIndexer indexer,
ChangeInserter.Factory changeInserterFactory,
ChangeNotes.Factory notesFactory,
DynamicItem<ChangeReportFormatter> changeFormatterProvider,
CmdLineParser.Factory optionParserFactory,
CommentsUtil commentsUtil,
BranchCommitValidator.Factory commitValidatorFactory,
CreateGroupPermissionSyncer createGroupPermissionSyncer,
CreateRefControl createRefControl,
DynamicMap<ProjectConfigEntry> pluginConfigEntries,
DynamicSet<PluginPushOption> pluginPushOptions,
PluginSetContext<ReceivePackInitializer> initializers,
PluginSetContext<CommentValidator> commentValidators,
MergedByPushOp.Factory mergedByPushOpFactory,
PatchSetInfoFactory patchSetInfoFactory,
PatchSetUtil psUtil,
DynamicSet<PerformanceLogger> performanceLoggers,
PermissionBackend permissionBackend,
ProjectCache projectCache,
Provider<InternalChangeQuery> queryProvider,
Provider<MergeOp> mergeOpProvider,
Provider<MergeOpRepoManager> ormProvider,
PublishCommentsOp.Factory publishCommentsOp,
ReceiveConfig receiveConfig,
RefOperationValidators.Factory refValidatorsFactory,
ReplaceOp.Factory replaceOpFactory,
PluginSetContext<RequestListener> requestListeners,
RetryHelper retryHelper,
RequestScopePropagator requestScopePropagator,
Sequences seq,
SetHashtagsOp.Factory hashtagsFactory,
SetTopicOp.Factory setTopicFactory,
@SuperprojectUpdateOnSubmission
ImmutableList<SubmissionListener> superprojectUpdateSubmissionListeners,
TagCache tagCache,
SetPrivateOp.Factory setPrivateOpFactory,
ReplyAttentionSetUpdates replyAttentionSetUpdates,
DynamicItem<UrlFormatter> urlFormatter,
AutoMerger autoMerger,
@Assisted ProjectState projectState,
@Assisted IdentifiedUser user,
@Assisted ReceivePack rp,
@Assisted Repository repository,
@Assisted AllRefsWatcher allRefsWatcher,
@Nullable @Assisted MessageSender messageSender)
throws IOException {
// Injected fields.
this.accountResolver = accountResolver;
this.allProjectsName = allProjectsName;
this.batchUpdateFactory = batchUpdateFactory;
this.changeFormatter = changeFormatterProvider.get();
this.changeInserterFactory = changeInserterFactory;
this.commentsUtil = commentsUtil;
this.commentValidators = commentValidators;
this.commitValidatorFactory = commitValidatorFactory;
this.config = config;
this.createRefControl = createRefControl;
this.createGroupPermissionSyncer = createGroupPermissionSyncer;
this.editUtil = editUtil;
this.hashtagsFactory = hashtagsFactory;
this.setTopicFactory = setTopicFactory;
this.indexer = indexer;
this.initializers = initializers;
this.mergeOpProvider = mergeOpProvider;
this.mergedByPushOpFactory = mergedByPushOpFactory;
this.notesFactory = notesFactory;
this.optionParserFactory = optionParserFactory;
this.ormProvider = ormProvider;
this.patchSetInfoFactory = patchSetInfoFactory;
this.permissionBackend = permissionBackend;
this.pluginConfigEntries = pluginConfigEntries;
this.pluginPushOptions = pluginPushOptions;
this.projectCache = projectCache;
this.psUtil = psUtil;
this.performanceLoggers = performanceLoggers;
this.publishCommentsOp = publishCommentsOp;
this.queryProvider = queryProvider;
this.receiveConfig = receiveConfig;
this.refValidatorsFactory = refValidatorsFactory;
this.replaceOpFactory = replaceOpFactory;
this.requestListeners = requestListeners;
this.retryHelper = retryHelper;
this.requestScopePropagator = requestScopePropagator;
this.seq = seq;
this.superprojectUpdateSubmissionListeners = superprojectUpdateSubmissionListeners;
this.tagCache = tagCache;
this.projectConfigFactory = projectConfigFactory;
this.setPrivateOpFactory = setPrivateOpFactory;
this.replyAttentionSetUpdates = replyAttentionSetUpdates;
this.urlFormatter = urlFormatter;
this.autoMerger = autoMerger;
// Assisted injected fields.
this.projectState = projectState;
this.user = user;
this.receivePack = rp;
// This repository instance in unwrapped, while the repository instance in
// receivePack.getRepo() is wrapped in PermissionAwareRepository instance.
this.repo = repository;
// Immutable fields derived from constructor arguments.
project = projectState.getProject();
labelTypes = projectState.getLabelTypes();
permissions = permissionBackend.user(user).project(project.getNameKey());
rejectCommits = BanCommit.loadRejectCommitsMap(repo, rp.getRevWalk());
// Collections populated during processing.
errors = MultimapBuilder.linkedHashKeys().arrayListValues().build();
messages = new ConcurrentLinkedQueue<>();
pushOptions = LinkedListMultimap.create();
replaceByChange = new LinkedHashMap<>();
updateGroups = new ArrayList<>();
used = false;
this.allowProjectOwnersToChangeParent =
config.getBoolean("receive", "allowProjectOwnersToChangeParent", false);
// Other settings populated during processing.
newChangeForAllNotInTarget =
projectState.is(BooleanProjectConfig.CREATE_NEW_CHANGE_FOR_ALL_NOT_IN_TARGET);
// Handles for outputting back over the wire to the end user.
this.messageSender = messageSender != null ? messageSender : new ReceivePackMessageSender();
this.result = ReceiveCommitsResult.builder();
this.loggingTags = ImmutableMap.of();
// TODO(hiesel): Make this decision implicit once vetted
boolean useRefCache = config.getBoolean("receive", "enableInMemoryRefCache", true);
receivePackRefCache =
useRefCache
? ReceivePackRefCache.withAdvertisedRefs(() -> allRefsWatcher.getAllRefs())
: ReceivePackRefCache.noCache(receivePack.getRepository().getRefDatabase());
}
void init() {
initializers.runEach(i -> i.init(projectState.getNameKey(), receivePack));
}
MessageSender getMessageSender() {
return messageSender;
}
Project getProject() {
return project;
}
private void addMessage(String message, ValidationMessage.Type type) {
messages.add(new CommitValidationMessage(message, type));
}
private void addMessage(String message) {
messages.add(new CommitValidationMessage(message, ValidationMessage.Type.OTHER));
}
private void addError(String error) {
addMessage(error, ValidationMessage.Type.ERROR);
}
/**
* Sends all messages which have been collected while processing the push to the client.
*
* <p><strong>Attention:</strong>{@link AsyncReceiveCommits} may call this method while {@link
* #processCommands(Collection, MultiProgressMonitor)} is still running (if the execution of
* processCommands takes too long and AsyncReceiveCommits gets a timeout). This means that local
* variables that are accessed in this method must be thread-safe (otherwise we may hit a {@link
* java.util.ConcurrentModificationException} if we read a variable here that at the same time is
* updated by the background thread that still executes processCommands).
*/
void sendMessages() {
try (TraceContext traceContext =
TraceContext.newTrace(
loggingTags.containsKey(RequestId.Type.TRACE_ID.name()),
loggingTags.get(RequestId.Type.TRACE_ID.name()),
(tagName, traceId) -> {})) {
loggingTags.forEach((tagName, tagValue) -> traceContext.addTag(tagName, tagValue));
for (ValidationMessage m : messages) {
String msg = m.getType().getPrefix() + m.getMessage();
logger.atFine().log("Sending message: %s", msg);
// Avoid calling sendError which will add its own error: prefix.
messageSender.sendMessage(msg);
}
}
}
ReceiveCommitsResult processCommands(
Collection<ReceiveCommand> commands, MultiProgressMonitor progress) throws StorageException {
checkState(!used, "Tried to re-use a ReceiveCommits objects that is single-use only");
parsePushOptions();
int commandCount = commands.size();
try (TraceContext traceContext =
TraceContext.newTrace(
tracePushOption.isPresent(),
tracePushOption.orElse(null),
(tagName, traceId) -> addMessage(tagName + ": " + traceId));
TraceTimer traceTimer =
newTimer("processCommands", Metadata.builder().resourceCount(commandCount));
PerformanceLogContext performanceLogContext =
new PerformanceLogContext(config, performanceLoggers)) {
RequestInfo requestInfo =
RequestInfo.builder(RequestInfo.RequestType.GIT_RECEIVE, user, traceContext)
.project(project.getNameKey())
.build();
requestListeners.runEach(l -> l.onRequest(requestInfo));
traceContext.addTag(RequestId.Type.RECEIVE_ID, new RequestId(project.getNameKey().get()));
// Log the push options here, rather than in parsePushOptions(), so that they are included
// into the trace if tracing is enabled.
logger.atFine().log("push options: %s", receivePack.getPushOptions());
Task commandProgress = progress.beginSubTask("refs", UNKNOWN);
commands =
commands.stream().map(c -> wrapReceiveCommand(c, commandProgress)).collect(toList());
processCommandsUnsafe(commands, progress);
rejectRemaining(commands, INTERNAL_SERVER_ERROR);
// This sends error messages before the 'done' string of the progress monitor is sent.
// Currently, the test framework relies on this ordering to understand if pushes completed
// successfully.
sendErrorMessages();
commandProgress.end();
progress.end();
loggingTags = traceContext.getTags();
logger.atFine().log("Processing commands done.");
}
return result.build();
}
// Process as many commands as possible, but may leave some commands in state NOT_ATTEMPTED.
private void processCommandsUnsafe(
Collection<ReceiveCommand> commands, MultiProgressMonitor progress) {
logger.atFine().log("Calling user: %s", user.getLoggableName());
logger.atFine().log("Groups: %s", lazy(() -> user.getEffectiveGroups().getKnownGroups()));
if (!projectState.getProject().getState().permitsWrite()) {
for (ReceiveCommand cmd : commands) {
reject(cmd, "prohibited by Gerrit: project state does not permit write");
}
return;
}
logger.atFine().log("Parsing %d commands", commands.size());
List<ReceiveCommand> magicCommands = new ArrayList<>();
List<ReceiveCommand> regularCommands = new ArrayList<>();
for (ReceiveCommand cmd : commands) {
if (MagicBranch.isMagicBranch(cmd.getRefName())) {
magicCommands.add(cmd);
} else {
regularCommands.add(cmd);
}
}
if (!magicCommands.isEmpty() && !regularCommands.isEmpty()) {
rejectRemaining(commands, "cannot combine normal pushes and magic pushes");
return;
}
try {
if (!regularCommands.isEmpty()) {
handleRegularCommands(regularCommands, progress);
return;
}
boolean first = true;
for (ReceiveCommand cmd : magicCommands) {
if (first) {
parseMagicBranch(cmd);
first = false;
} else {
reject(cmd, "duplicate request");
}
}
} catch (PermissionBackendException | NoSuchProjectException | IOException err) {
logger.atSevere().withCause(err).log("Failed to process refs in %s", project.getName());
return;
}
Task newProgress = progress.beginSubTask("new", UNKNOWN);
Task replaceProgress = progress.beginSubTask("updated", UNKNOWN);
List<CreateRequest> newChanges = Collections.emptyList();
try {
if (magicBranch != null && magicBranch.cmd.getResult() == NOT_ATTEMPTED) {
try {
newChanges = selectNewAndReplacedChangesFromMagicBranch(newProgress);
} catch (IOException e) {
throw new StorageException("Failed to select new changes in " + project.getName(), e);
}
}
// Commit validation has already happened, so any changes without Change-Id are for the
// deprecated feature.
warnAboutMissingChangeId(newChanges);
preparePatchSetsForReplace(newChanges);
insertChangesAndPatchSets(newChanges, replaceProgress);
} finally {
newProgress.end();
replaceProgress.end();
}
queueSuccessMessages(newChanges);
logger.atFine().log(
"Command results: %s",
lazy(() -> commands.stream().map(ReceiveCommits::commandToString).collect(joining(","))));
}
private void sendErrorMessages() {
if (!errors.isEmpty()) {
logger.atFine().log("Handling error conditions: %s", errors.keySet());
for (String error : errors.keySet()) {
receivePack.sendMessage("error: " + buildError(error, errors.get(error)));
}
receivePack.sendMessage(String.format("User: %s", user.getLoggableName()));
receivePack.sendMessage(COMMAND_REJECTION_MESSAGE_FOOTER);
}
}
private void handleRegularCommands(List<ReceiveCommand> cmds, MultiProgressMonitor progress)
throws PermissionBackendException, IOException, NoSuchProjectException {
try (TraceTimer traceTimer =
newTimer("handleRegularCommands", Metadata.builder().resourceCount(cmds.size()))) {
result.magicPush(false);
for (ReceiveCommand cmd : cmds) {
parseRegularCommand(cmd);
}
Map<BranchNameKey, ReceiveCommand> branches;
try (BatchUpdate bu =
batchUpdateFactory.create(
project.getNameKey(), user.materializedCopy(), TimeUtil.nowTs());
ObjectInserter ins = repo.newObjectInserter();
ObjectReader reader = ins.newReader();
RevWalk rw = new RevWalk(reader);
MergeOpRepoManager orm = ormProvider.get()) {
bu.setRepository(repo, rw, ins);
bu.setRefLogMessage("push");
int added = 0;
for (ReceiveCommand cmd : cmds) {
if (cmd.getResult() == NOT_ATTEMPTED) {
bu.addRepoOnlyOp(new UpdateOneRefOp(cmd));
added++;
}
}
logger.atFine().log("Added %d additional ref updates", added);
SubmissionExecutor submissionExecutor =
new SubmissionExecutor(false, superprojectUpdateSubmissionListeners);
submissionExecutor.execute(ImmutableList.of(bu));
orm.setContext(TimeUtil.nowTs(), user, NotifyResolver.Result.none());
submissionExecutor.afterExecutions(orm);
branches = bu.getSuccessfullyUpdatedBranches(false);
} catch (UpdateException | RestApiException e) {
throw new StorageException(e);
}
// This could be moved into a SubmissionListener
branches.values().stream()
.filter(c -> isHead(c) || isConfig(c))
.forEach(
c -> {
// Most post-update steps should happen in UpdateOneRefOp#postUpdate. The only steps
// that should happen in this loops are things that can't happen within one
// BatchUpdate because they involve kicking off an additional BatchUpdate.
switch (c.getType()) {
case CREATE:
case UPDATE:
case UPDATE_NONFASTFORWARD:
Task closeProgress = progress.beginSubTask("closed", UNKNOWN);
autoCloseChanges(c, closeProgress);
closeProgress.end();
break;
case DELETE:
break;
}
});
}
}
/** Appends messages for successful change creation/updates. */
private void queueSuccessMessages(List<CreateRequest> newChanges) {
// adjacency list for commit => parent
Map<String, String> adjList = new HashMap<>();
for (CreateRequest cr : newChanges) {
String parent = cr.commit.getParentCount() == 0 ? null : cr.commit.getParent(0).name();
adjList.put(cr.commit.name(), parent);
}
for (ReplaceRequest rr : replaceByChange.values()) {
String parent = null;
if (rr.revCommit != null) {
parent = rr.revCommit.getParentCount() == 0 ? null : rr.revCommit.getParent(0).name();
}
adjList.put(rr.newCommitId.name(), parent);
}
// get commits that are not parents
Set<String> leafs = new TreeSet<>(adjList.keySet());
leafs.removeAll(adjList.values());
// go backwards from the last commit to its parent(s)
Set<String> ordered = new LinkedHashSet<>();
for (String leaf : leafs) {
if (ordered.contains(leaf)) {
continue;
}
while (leaf != null) {
if (!ordered.contains(leaf)) {
ordered.add(leaf);
}
leaf = adjList.get(leaf);
}
}
// reverse the order to start with earliest commit
List<String> orderedCommits = new ArrayList<>(ordered);
Collections.reverse(orderedCommits);
Map<String, CreateRequest> created =
newChanges.stream()
.filter(r -> r.change != null)
.collect(Collectors.toMap(r -> r.commit.name(), r -> r));
Map<String, ReplaceRequest> updated =
replaceByChange.values().stream()
.filter(r -> r.inputCommand.getResult() == OK)
.collect(Collectors.toMap(r -> r.newCommitId.name(), r -> r));
if (created.isEmpty() && updated.isEmpty()) {
return;
}
addMessage("");
addMessage("SUCCESS");
addMessage("");
boolean edit = false;
Boolean isPrivate = null;
Boolean wip = null;
if (!updated.isEmpty()) {
edit = magicBranch != null && magicBranch.edit;
if (magicBranch != null) {
if (magicBranch.isPrivate) {
isPrivate = true;
} else if (magicBranch.removePrivate) {
isPrivate = false;
}
if (magicBranch.workInProgress) {
wip = true;
} else if (magicBranch.ready) {
wip = false;
}
}
}
for (String commit : orderedCommits) {
if (created.get(commit) != null) {
addCreatedMessage(created.get(commit));
} else if (updated.get(commit) != null) {
addReplacedMessage(updated.get(commit), edit, isPrivate, wip);
}
}
addMessage("");
}
private void addCreatedMessage(CreateRequest c) {
addMessage(
changeFormatter.newChange(
ChangeReportFormatter.Input.builder().setChange(c.change).build()));
}
private void addReplacedMessage(ReplaceRequest u, boolean edit, Boolean isPrivate, Boolean wip) {
String subject;
if (edit) {
subject =
u.revCommit == null ? u.notes.getChange().getSubject() : u.revCommit.getShortMessage();
} else {
subject = u.info.getSubject();
}
if (isPrivate == null) {
isPrivate = u.notes.getChange().isPrivate();
}
if (wip == null) {
wip = u.notes.getChange().isWorkInProgress();
}
ChangeReportFormatter.Input input =
ChangeReportFormatter.Input.builder()
.setChange(u.notes.getChange())
.setSubject(subject)
.setIsEdit(edit)
.setIsPrivate(isPrivate)
.setIsWorkInProgress(wip)
.build();
addMessage(changeFormatter.changeUpdated(input));
}
private void insertChangesAndPatchSets(List<CreateRequest> newChanges, Task replaceProgress) {
try (TraceTimer traceTimer =
newTimer(
"insertChangesAndPatchSets", Metadata.builder().resourceCount(newChanges.size()))) {
ReceiveCommand magicBranchCmd = magicBranch != null ? magicBranch.cmd : null;
if (magicBranchCmd != null && magicBranchCmd.getResult() != NOT_ATTEMPTED) {
logger.atWarning().log(
"Skipping change updates on %s because ref update failed: %s %s",
project.getName(),
magicBranchCmd.getResult(),
Strings.nullToEmpty(magicBranchCmd.getMessage()));
return;
}
try (BatchUpdate bu =
batchUpdateFactory.create(
project.getNameKey(), user.materializedCopy(), TimeUtil.nowTs());
ObjectInserter ins = repo.newObjectInserter();
ObjectReader reader = ins.newReader();
RevWalk rw = new RevWalk(reader)) {
bu.setRepository(repo, rw, ins);
bu.setRefLogMessage("push");
if (magicBranch != null) {
bu.setNotify(magicBranch.getNotifyForNewChange());
}
logger.atFine().log("Adding %d replace requests", newChanges.size());
for (ReplaceRequest replace : replaceByChange.values()) {
replace.addOps(bu, replaceProgress);
if (magicBranch != null) {
bu.setNotifyHandling(replace.ontoChange, magicBranch.getNotifyHandling(replace.notes));
if (magicBranch.shouldPublishComments()) {
bu.addOp(
replace.notes.getChangeId(),
publishCommentsOp.create(replace.psId, project.getNameKey()));
Optional<ChangeNotes> changeNotes = getChangeNotes(replace.notes.getChangeId());
if (!changeNotes.isPresent()) {
// If not present, no need to update attention set here since this is a new change.
continue;
}
List<HumanComment> drafts =
commentsUtil.draftByChangeAuthor(changeNotes.get(), user.getAccountId());
if (drafts.isEmpty()) {
// If no comments, attention set shouldn't update since the user didn't reply.
continue;
}
replyAttentionSetUpdates.processAutomaticAttentionSetRulesOnReply(
bu, changeNotes.get(), isReadyForReview(changeNotes.get()), user, drafts);
}
}
}
logger.atFine().log("Adding %d create requests", newChanges.size());
for (CreateRequest create : newChanges) {
create.addOps(bu);
}
logger.atFine().log("Adding %d group update requests", newChanges.size());
updateGroups.forEach(r -> r.addOps(bu));
logger.atFine().log("Executing batch");
try {
bu.execute();
} catch (UpdateException e) {
throw asRestApiException(e);
}
replaceByChange.values().stream()
.forEach(
req ->
result.addChange(ReceiveCommitsResult.ChangeStatus.REPLACED, req.ontoChange));
newChanges.stream()
.forEach(
req -> result.addChange(ReceiveCommitsResult.ChangeStatus.CREATED, req.changeId));
if (magicBranchCmd != null) {
magicBranchCmd.setResult(OK);
}
for (ReplaceRequest replace : replaceByChange.values()) {
String rejectMessage = replace.getRejectMessage();
if (rejectMessage == null) {
if (replace.inputCommand.getResult() == NOT_ATTEMPTED) {
// Not necessarily the magic branch, so need to set OK on the original value.
replace.inputCommand.setResult(OK);
}
} else {
logger.atFine().log("Rejecting due to message from ReplaceOp");
reject(replace.inputCommand, rejectMessage);
}
}
} catch (ResourceConflictException e) {
addError(e.getMessage());
reject(magicBranchCmd, "conflict");
} catch (BadRequestException | UnprocessableEntityException | AuthException e) {
logger.atFine().withCause(e).log("Rejecting due to client error");
reject(magicBranchCmd, e.getMessage());
} catch (RestApiException | IOException e) {
throw new StorageException("Can't insert change/patch set for " + project.getName(), e);
}
if (magicBranch != null && magicBranch.submit) {
try {
submit(newChanges, replaceByChange.values());
} catch (ResourceConflictException e) {
addError(e.getMessage());
reject(magicBranchCmd, "conflict");
} catch (RestApiException
| StorageException
| UpdateException
| IOException
| ConfigInvalidException
| PermissionBackendException e) {
logger.atSevere().withCause(e).log("Error submitting changes to %s", project.getName());
reject(magicBranchCmd, "error during submit");
}
}
}
}
private boolean isReadyForReview(ChangeNotes changeNotes) {
return (!changeNotes.getChange().isWorkInProgress() && !magicBranch.workInProgress)
|| magicBranch.ready;
}
private String buildError(String error, List<String> branches) {
StringBuilder sb = new StringBuilder();
if (branches.size() == 1) {
String branch = branches.get(0);
sb.append("branch ").append(branch).append(":\n");
// As of 2020, there are still many git-review <1.27 installations in the wild.
// These users will see failures as their old git-review assumes that
// `refs/publish/...` is still magic, which it isn't. As Gerrit's default error messages are
// misleading for these users, we hint them at upgrading their git-review.
if (branch.startsWith("refs/publish/")) {
sb.append("If you are using git-review, update to at least git-review 1.27. Otherwise:\n");
}
sb.append(error);
return sb.toString();
}
sb.append("branches ").append(Joiner.on(", ").join(branches));
return sb.append(":\n").append(error).toString();
}
/** Parses push options specified as "git push -o OPTION" */
private void parsePushOptions() {
List<String> optionList = receivePack.getPushOptions();
if (optionList != null) {
for (String option : optionList) {
int e = option.indexOf('=');
if (e > 0) {
pushOptions.put(option.substring(0, e), option.substring(e + 1));
} else {
pushOptions.put(option, "");
}
}
}
List<String> noteDbValues = pushOptions.get("notedb");
if (!noteDbValues.isEmpty()) {
// These semantics for duplicates/errors are somewhat arbitrary and may not match e.g. the
// CmdLineParser behavior used by MagicBranchInput.
String value = Iterables.getLast(noteDbValues);
noteDbPushOption = NoteDbPushOption.parse(value);
if (!noteDbPushOption.isPresent()) {
addError("Invalid value in -o " + NoteDbPushOption.OPTION_NAME + "=" + value);
}
} else {
noteDbPushOption = Optional.of(NoteDbPushOption.DISALLOW);
}
List<String> traceValues = pushOptions.get("trace");
if (!traceValues.isEmpty()) {
tracePushOption = Optional.of(Iterables.getLast(traceValues));
} else {
tracePushOption = Optional.empty();
}
}
// Wrap ReceiveCommand so the progress counter works automatically.
private ReceiveCommand wrapReceiveCommand(ReceiveCommand cmd, Task progress) {
String refname = cmd.getRefName();
if (isRefsUsersSelf(cmd.getRefName(), projectState.isAllUsers())) {
refname = RefNames.refsUsers(user.getAccountId());
logger.atFine().log("Swapping out command for %s to %s", RefNames.REFS_USERS_SELF, refname);
}
// We must also update the original, because callers may inspect it afterwards to decide if
// the command went through or not.
return new ReceiveCommand(cmd.getOldId(), cmd.getNewId(), refname, cmd.getType()) {
@Override
public void setResult(Result s, String m) {
if (getResult() == NOT_ATTEMPTED) { // Only report the progress update once.
progress.update(1);
}
// Counter intuitively, we don't check that results == NOT_ATTEMPTED here.
// This is so submit-on-push can still reject the update if the change is created
// successfully
// (status OK) but the submit failed (merge failed: REJECTED_OTHER_REASON).
super.setResult(s, m);
cmd.setResult(s, m);
}
};
}
/*
* Interpret a normal push.
*/
private void parseRegularCommand(ReceiveCommand cmd)
throws PermissionBackendException, NoSuchProjectException, IOException {
try (TraceTimer traceTimer = newTimer("parseRegularCommand")) {
if (cmd.getResult() != NOT_ATTEMPTED) {
// Already rejected by the core receive process.
logger.atFine().log("Already processed by core: %s %s", cmd.getResult(), cmd);
return;
}
if (!Repository.isValidRefName(cmd.getRefName()) || cmd.getRefName().contains("//")) {
reject(cmd, "not valid ref");
return;
}
if (RefNames.isNoteDbMetaRef(cmd.getRefName())) {
// Reject pushes to NoteDb refs without a special option and permission. Note that this
// prohibition doesn't depend on NoteDb being enabled in any way, since all sites will
// migrate to NoteDb eventually, and we don't want garbage data waiting there when the
// migration finishes.
logger.atFine().log(
"%s NoteDb ref %s with %s=%s",
cmd.getType(), cmd.getRefName(), NoteDbPushOption.OPTION_NAME, noteDbPushOption);
if (!Optional.of(NoteDbPushOption.ALLOW).equals(noteDbPushOption)) {
// Only reject this command, not the whole push. This supports the use case of "git clone
// --mirror" followed by "git push --mirror", when the user doesn't really intend to clone
// or mirror the NoteDb data; there is no single refspec that describes all refs *except*
// NoteDb refs.
reject(
cmd,
"NoteDb update requires -o "
+ NoteDbPushOption.OPTION_NAME
+ "="
+ NoteDbPushOption.ALLOW.value());
return;
}
try {
permissionBackend.user(user).check(GlobalPermission.ACCESS_DATABASE);
} catch (AuthException e) {
reject(cmd, "NoteDb update requires access database permission");
return;
}
}
switch (cmd.getType()) {
case CREATE:
parseCreate(cmd);
break;
case UPDATE:
parseUpdate(cmd);
break;
case DELETE:
parseDelete(cmd);
break;
case UPDATE_NONFASTFORWARD:
parseRewind(cmd);
break;
default:
reject(cmd, "prohibited by Gerrit: unknown command type " + cmd.getType());
return;
}
if (cmd.getResult() != NOT_ATTEMPTED) {
return;
}
if (isConfig(cmd)) {
validateConfigPush(cmd);
}
}
}
/** Validates a push to refs/meta/config, and reject the command if it fails. */
private void validateConfigPush(ReceiveCommand cmd) throws PermissionBackendException {
try (TraceTimer traceTimer = newTimer("validateConfigPush")) {
logger.atFine().log("Processing %s command", cmd.getRefName());
try {
permissions.check(ProjectPermission.WRITE_CONFIG);
} catch (AuthException e) {
reject(
cmd,
String.format(
"must be either project owner or have %s permission",
ProjectPermission.WRITE_CONFIG.describeForException()));
return;
}
switch (cmd.getType()) {
case CREATE:
case UPDATE:
case UPDATE_NONFASTFORWARD:
try {
ProjectConfig cfg = projectConfigFactory.create(project.getNameKey());
cfg.load(project.getNameKey(), receivePack.getRevWalk(), cmd.getNewId());
if (!cfg.getValidationErrors().isEmpty()) {
addError("Invalid project configuration:");
for (ValidationError err : cfg.getValidationErrors()) {
addError(" " + err.getMessage());
}
reject(cmd, "invalid project configuration");
logger.atSevere().log(
"User %s tried to push invalid project configuration %s for %s",
user.getLoggableName(), cmd.getNewId().name(), project.getName());
return;
}
Project.NameKey newParent = cfg.getProject().getParent(allProjectsName);
Project.NameKey oldParent = project.getParent(allProjectsName);
if (oldParent == null) {
// update of the 'All-Projects' project
if (newParent != null) {
reject(cmd, "invalid project configuration: root project cannot have parent");
return;
}
} else {
if (!oldParent.equals(newParent)) {
if (allowProjectOwnersToChangeParent) {
try {
permissionBackend
.user(user)
.project(project.getNameKey())
.check(ProjectPermission.WRITE_CONFIG);
} catch (AuthException e) {
reject(
cmd, "invalid project configuration: only project owners can set parent");
return;
}
} else {
try {
permissionBackend.user(user).check(GlobalPermission.ADMINISTRATE_SERVER);
} catch (AuthException e) {
reject(cmd, "invalid project configuration: only Gerrit admin can set parent");
return;
}
}
}
if (!projectCache.get(newParent).isPresent()) {
reject(cmd, "invalid project configuration: parent does not exist");
return;
}
}
validatePluginConfig(cmd, cfg);
} catch (Exception e) {
reject(cmd, "invalid project configuration");
logger.atSevere().withCause(e).log(
"User %s tried to push invalid project configuration %s for %s",
user.getLoggableName(), cmd.getNewId().name(), project.getName());
return;
}
break;
case DELETE:
break;
default:
reject(
cmd,
"prohibited by Gerrit: don't know how to handle config update of type "
+ cmd.getType());
}
}
}
/**
* validates a push to refs/meta/config for plugin configuration, and rejects the push if it
* fails.
*/
private void validatePluginConfig(ReceiveCommand cmd, ProjectConfig cfg) {
for (Extension<ProjectConfigEntry> e : pluginConfigEntries) {
PluginConfig pluginCfg = cfg.getPluginConfig(e.getPluginName());
ProjectConfigEntry configEntry = e.getProvider().get();
String value = pluginCfg.getString(e.getExportName());
String oldValue =
projectState.getPluginConfig(e.getPluginName()).getString(e.getExportName());
if (configEntry.getType() == ProjectConfigEntryType.ARRAY) {
oldValue =
Arrays.stream(
projectState
.getPluginConfig(e.getPluginName())
.getStringList(e.getExportName()))
.collect(joining("\n"));
}
if ((value == null ? oldValue != null : !value.equals(oldValue))
&& !configEntry.isEditable(projectState)) {
reject(
cmd,
String.format(
"invalid project configuration: Not allowed to set parameter"
+ " '%s' of plugin '%s' on project '%s'.",
e.getExportName(), e.getPluginName(), project.getName()));
continue;
}
if (ProjectConfigEntryType.LIST.equals(configEntry.getType())
&& value != null
&& !configEntry.getPermittedValues().contains(value)) {
reject(
cmd,
String.format(
"invalid project configuration: The value '%s' is "
+ "not permitted for parameter '%s' of plugin '%s'.",
value, e.getExportName(), e.getPluginName()));
}
}
}
private void parseCreate(ReceiveCommand cmd)
throws PermissionBackendException, NoSuchProjectException, IOException {
try (TraceTimer traceTimer = newTimer("parseCreate")) {
RevObject obj;
try {
obj = receivePack.getRevWalk().parseAny(cmd.getNewId());
} catch (IOException e) {
throw new StorageException(
String.format(
"Invalid object %s for %s creation", cmd.getNewId().name(), cmd.getRefName()),
e);
}
logger.atFine().log("Creating %s", cmd);
if (isHead(cmd) && !isCommit(cmd)) {
return;
}
BranchNameKey branch = BranchNameKey.create(project.getName(), cmd.getRefName());
try {
// Must pass explicit user instead of injecting a provider into CreateRefControl, since
// Provider<CurrentUser> within ReceiveCommits will always return anonymous.
createRefControl.checkCreateRef(
Providers.of(user), receivePack.getRepository(), branch, obj);
} catch (AuthException denied) {
rejectProhibited(cmd, denied);
return;
} catch (ResourceConflictException denied) {
reject(cmd, "prohibited by Gerrit: " + denied.getMessage());
return;
}
if (validRefOperation(cmd)) {
validateRegularPushCommits(
BranchNameKey.create(project.getNameKey(), cmd.getRefName()), cmd);
}
}
}
private void parseUpdate(ReceiveCommand cmd) throws PermissionBackendException {
try (TraceTimer traceTimer = TraceContext.newTimer("parseUpdate")) {
logger.atFine().log("Updating %s", cmd);
Optional<AuthException> err = checkRefPermission(cmd, RefPermission.UPDATE);
if (!err.isPresent()) {
if (isHead(cmd) && !isCommit(cmd)) {
reject(cmd, "head must point to commit");
return;
}
if (validRefOperation(cmd)) {
validateRegularPushCommits(
BranchNameKey.create(project.getNameKey(), cmd.getRefName()), cmd);
}
} else {
rejectProhibited(cmd, err.get());
}
}
}
private boolean isCommit(ReceiveCommand cmd) {
RevObject obj;
try {
obj = receivePack.getRevWalk().parseAny(cmd.getNewId());
} catch (IOException e) {
throw new StorageException(
String.format(
"Invalid object %s for %s creation", cmd.getNewId().name(), cmd.getRefName()),
e);
}
if (obj instanceof RevCommit) {
return true;
}
reject(cmd, "not a commit");
return false;
}
private void parseDelete(ReceiveCommand cmd) throws PermissionBackendException {
try (TraceTimer traceTimer = newTimer("parseDelete")) {
logger.atFine().log("Deleting %s", cmd);
if (cmd.getRefName().startsWith(REFS_CHANGES)) {
errors.put(CANNOT_DELETE_CHANGES, cmd.getRefName());
reject(cmd, "cannot delete changes");
} else if (isConfigRef(cmd.getRefName())) {
errors.put(CANNOT_DELETE_CONFIG, cmd.getRefName());
reject(cmd, "cannot delete project configuration");
}
Optional<AuthException> err = checkRefPermission(cmd, RefPermission.DELETE);
if (!err.isPresent()) {
validRefOperation(cmd);
} else {
rejectProhibited(cmd, err.get());
}
}
}
private void parseRewind(ReceiveCommand cmd) throws PermissionBackendException {
try (TraceTimer traceTimer = newTimer("parseRewind")) {
try {
receivePack.getRevWalk().parseCommit(cmd.getNewId());
} catch (IOException e) {
throw new StorageException(
String.format(
"Invalid object %s for %s creation", cmd.getNewId().name(), cmd.getRefName()),
e);
}
logger.atFine().log("Rewinding %s", cmd);
if (!validRefOperation(cmd)) {
return;
}
validateRegularPushCommits(BranchNameKey.create(project.getNameKey(), cmd.getRefName()), cmd);
if (cmd.getResult() != NOT_ATTEMPTED) {
return;
}
Optional<AuthException> err = checkRefPermission(cmd, RefPermission.FORCE_UPDATE);
if (err.isPresent()) {
rejectProhibited(cmd, err.get());
}
}
}
private Optional<AuthException> checkRefPermission(ReceiveCommand cmd, RefPermission perm)
throws PermissionBackendException {
return checkRefPermission(permissions.ref(cmd.getRefName()), perm);
}
private Optional<AuthException> checkRefPermission(
PermissionBackend.ForRef forRef, RefPermission perm) throws PermissionBackendException {
try {
forRef.check(perm);
return Optional.empty();
} catch (AuthException e) {
return Optional.of(e);
}
}
private void rejectProhibited(ReceiveCommand cmd, AuthException err) {
err.getAdvice().ifPresent(a -> errors.put(a, cmd.getRefName()));
reject(cmd, prohibited(err, cmd.getRefName()));
}
private static String prohibited(AuthException e, String alreadyDisplayedResource) {
String msg = e.getMessage();
if (e instanceof PermissionDeniedException) {
PermissionDeniedException pde = (PermissionDeniedException) e;
if (pde.getResource().isPresent()
&& pde.getResource().get().equals(alreadyDisplayedResource)) {
// Avoid repeating resource name if exactly the given name was already displayed by the
// generic git push machinery.
msg = PermissionDeniedException.MESSAGE_PREFIX + pde.describePermission();
}
}
return "prohibited by Gerrit: " + msg;
}
static class MagicBranchInput {
private static final Splitter COMMAS = Splitter.on(',').omitEmptyStrings();
private final IdentifiedUser user;
private final ProjectState projectState;
private final boolean defaultPublishComments;
final ReceiveCommand cmd;
final LabelTypes labelTypes;
/**
* Draft comments are published with the commit iff {@code --publish-comments} is set. All
* drafts are withheld (overriding the option) if at least one of the following conditions are
* met:
*
* <ul>
* <li>Installed {@link CommentValidator} plugins reject one or more draft comments.
* <li>One or more comments exceed the maximum comment size (see {@link
* CommentSizeValidator}).
* <li>The maximum number of comments would be exceeded (see {@link CommentCountValidator}).
* </ul>
*/
private boolean withholdComments = false;
BranchNameKey dest;
PermissionBackend.ForRef perm;
Set<String> reviewer = Sets.newLinkedHashSet();
Set<String> cc = Sets.newLinkedHashSet();
Map<String, Short> labels = new HashMap<>();
String message;
List<RevCommit> baseCommit;
CmdLineParser cmdLineParser;
Set<String> hashtags = new HashSet<>();
@Option(name = "--trace", metaVar = "NAME", usage = "enable tracing")
String trace;
@Option(name = "--base", metaVar = "BASE", usage = "merge base of changes")
List<ObjectId> base;
@Option(name = "--topic", metaVar = "NAME", usage = "attach topic to changes")
String topic;
@Option(name = "--private", usage = "mark new/updated change as private")
boolean isPrivate;
@Option(name = "--remove-private", usage = "remove privacy flag from updated change")
boolean removePrivate;
@Option(
name = "--wip",
aliases = {"-work-in-progress"},
usage = "mark change as work in progress")
boolean workInProgress;
@Option(name = "--ready", usage = "mark change as ready")
boolean ready;
@Option(
name = "--edit",
aliases = {"-e"},
usage = "upload as change edit")
boolean edit;
@Option(name = "--submit", usage = "immediately submit the change")
boolean submit;
@Option(name = "--merged", usage = "create single change for a merged commit")
boolean merged;
@Option(name = "--publish-comments", usage = "publish all draft comments on updated changes")
private boolean publishComments;
@Option(
name = "--no-publish-comments",
aliases = {"--np"},
usage = "do not publish draft comments")
private boolean noPublishComments;
@Option(
name = "--notify",
usage =
"Notify handling that defines to whom email notifications "
+ "should be sent. Allowed values are NONE, OWNER, "
+ "OWNER_REVIEWERS, ALL. If not set, the default is ALL.")
private NotifyHandling notifyHandling;
@Option(
name = "--notify-to",
metaVar = "USER",
usage = "user that should be notified one time by email")
List<Account.Id> notifyTo = new ArrayList<>();
@Option(
name = "--notify-cc",
metaVar = "USER",
usage = "user that should be CC'd one time by email")
List<Account.Id> notifyCc = new ArrayList<>();
@Option(
name = "--notify-bcc",
metaVar = "USER",
usage = "user that should be BCC'd one time by email")
List<Account.Id> notifyBcc = new ArrayList<>();
@Option(
name = "--reviewer",
aliases = {"-r"},
metaVar = "REVIEWER",
usage = "add reviewer to changes")
void reviewer(String str) {
reviewer.add(str);
}
@Option(name = "--cc", metaVar = "CC", usage = "add CC to changes")
void cc(String str) {
cc.add(str);
}
@Option(
name = "--label",
aliases = {"-l"},
metaVar = "LABEL+VALUE",
usage = "label(s) to assign (defaults to +1 if no value provided)")
void addLabel(String token) throws CmdLineException {
LabelVote v = LabelVote.parse(token);
try {
LabelType.checkName(v.label());
ApprovalsUtil.checkLabel(labelTypes, v.label(), v.value());
} catch (BadRequestException e) {
throw cmdLineParser.reject(e.getMessage());
}
labels.put(v.label(), v.value());
}
@Option(
name = "--message",
aliases = {"-m"},
metaVar = "MESSAGE",
usage = "Comment message to apply to the review")
void addMessage(String token) {
// Many characters have special meaning in the context of a git ref.
//
// Clients can use underscores to represent spaces.
message = token.replace("_", " ");
try {
// Other characters can be represented using percent-encoding.
message = URLDecoder.decode(message, UTF_8.name());
} catch (IllegalArgumentException e) {
// Ignore decoding errors; leave message as percent-encoded.
} catch (UnsupportedEncodingException e) {
// This shouldn't happen; surely URLDecoder recognizes UTF-8.
throw new IllegalStateException(e);
}
}
@Option(
name = "--hashtag",
aliases = {"-t"},
metaVar = "HASHTAG",
usage = "add hashtag to changes")
void addHashtag(String token) {
String hashtag = cleanupHashtag(token);
if (!hashtag.isEmpty()) {
hashtags.add(hashtag);
}
}
@UsedAt(UsedAt.Project.GOOGLE)
@Option(name = "--create-cod-token", usage = "create a token for consistency-on-demand")
private boolean createCodToken;
MagicBranchInput(
IdentifiedUser user, ProjectState projectState, ReceiveCommand cmd, LabelTypes labelTypes) {
this.user = user;
this.projectState = projectState;
this.cmd = cmd;
this.labelTypes = labelTypes;
GeneralPreferencesInfo prefs = user.state().generalPreferences();
this.defaultPublishComments =
prefs != null
? firstNonNull(user.state().generalPreferences().publishCommentsOnPush, false)
: false;
}
/**
* Get reviewer strings from magic branch options, combined with additional recipients computed
* from some other place.
*
* <p>The set of reviewers on a change includes strings passed explicitly via options as well as
* account IDs computed from the commit message itself.
*
* @param additionalRecipients recipients parsed from the commit.
* @return set of reviewer strings to pass to {@code ReviewerModifier}.
*/
ImmutableSet<String> getCombinedReviewers(MailRecipients additionalRecipients) {
return getCombinedReviewers(reviewer, additionalRecipients.getReviewers());
}
/**
* Get CC strings from magic branch options, combined with additional recipients computed from
* some other place.
*
* <p>The set of CCs on a change includes strings passed explicitly via options as well as
* account IDs computed from the commit message itself.
*
* @param additionalRecipients recipients parsed from the commit.
* @return set of CC strings to pass to {@code ReviewerModifier}.
*/
ImmutableSet<String> getCombinedCcs(MailRecipients additionalRecipients) {
return getCombinedReviewers(cc, additionalRecipients.getCcOnly());
}
private static ImmutableSet<String> getCombinedReviewers(
Set<String> strings, Set<Account.Id> ids) {
return Streams.concat(strings.stream(), ids.stream().map(Account.Id::toString))
.collect(toImmutableSet());
}
void setWithholdComments(boolean withholdComments) {
this.withholdComments = withholdComments;
}
boolean shouldPublishComments() {
if (withholdComments) {
// Validation messages of type WARNING have already been added, now withhold the comments.
return false;
}
if (publishComments) {
return true;
}
if (noPublishComments) {
return false;
}
return defaultPublishComments;
}
/**
* returns the destination ref of the magic branch, and populates options in the cmdLineParser.
*/
String parse(ListMultimap<String, String> pushOptions) throws CmdLineException {
String ref = RefNames.fullName(MagicBranch.getDestBranchName(cmd.getRefName()));
ListMultimap<String, String> options = LinkedListMultimap.create(pushOptions);
// Process and lop off the "%OPTION" suffix.
int optionStart = ref.indexOf('%');
if (0 < optionStart) {
for (String s : COMMAS.split(ref.substring(optionStart + 1))) {
int e = s.indexOf('=');
if (0 < e) {
options.put(s.substring(0, e), s.substring(e + 1));
} else {
options.put(s, "");
}
}
ref = ref.substring(0, optionStart);
}
if (!options.isEmpty()) {
cmdLineParser.parseOptionMap(options);
}
return ref;
}
public boolean shouldSetWorkInProgressOnNewChanges() {
// When wip or ready explicitly provided, leave it as is.
if (workInProgress) {
return true;
}
if (ready) {
return false;
}
return projectState.is(BooleanProjectConfig.WORK_IN_PROGRESS_BY_DEFAULT)
|| firstNonNull(user.state().generalPreferences().workInProgressByDefault, false);
}
NotifyResolver.Result getNotifyForNewChange() {
return NotifyResolver.Result.create(
firstNonNull(
notifyHandling,
shouldSetWorkInProgressOnNewChanges() ? NotifyHandling.OWNER : NotifyHandling.ALL),
ImmutableSetMultimap.<RecipientType, Account.Id>builder()
.putAll(RecipientType.TO, notifyTo)
.putAll(RecipientType.CC, notifyCc)
.putAll(RecipientType.BCC, notifyBcc)
.build());
}
NotifyHandling getNotifyHandling(ChangeNotes notes) {
requireNonNull(notes);
if (notifyHandling != null) {
return notifyHandling;
}
if (workInProgress || (!ready && notes.getChange().isWorkInProgress())) {
return NotifyHandling.OWNER;
}
return NotifyHandling.ALL;
}
}
/**
* Parse the magic branch data (refs/for/BRANCH/OPTIONALTOPIC%OPTIONS) into the magicBranch
* member.
*
* <p>Assumes we are handling a magic branch here.
*/
private void parseMagicBranch(ReceiveCommand cmd) throws PermissionBackendException, IOException {
try (TraceTimer traceTimer = newTimer("parseMagicBranch")) {
logger.atFine().log("Found magic branch %s", cmd.getRefName());
MagicBranchInput magicBranch = new MagicBranchInput(user, projectState, cmd, labelTypes);
String ref;
magicBranch.cmdLineParser = optionParserFactory.create(magicBranch);
// Filter out plugin push options, as the parser would reject them as unknown.
ImmutableListMultimap<String, String> pushOptionsToParse =
pushOptions.entries().stream()
.filter(e -> !isPluginPushOption(e.getKey()))
.collect(toImmutableListMultimap(e -> e.getKey(), e -> e.getValue()));
try {
ref = magicBranch.parse(pushOptionsToParse);
} catch (CmdLineException e) {
if (!magicBranch.cmdLineParser.wasHelpRequestedByOption()) {
logger.atFine().log("Invalid branch syntax");
reject(cmd, e.getMessage());
return;
}
ref = null; // never happens
}
if (magicBranch.topic != null && magicBranch.topic.length() > ChangeUtil.TOPIC_MAX_LENGTH) {
reject(
cmd, String.format("topic length exceeds the limit (%d)", ChangeUtil.TOPIC_MAX_LENGTH));
}
if (magicBranch.cmdLineParser.wasHelpRequestedByOption()) {
StringWriter w = new StringWriter();
w.write("\nHelp for refs/for/branch:\n\n");
magicBranch.cmdLineParser.printUsage(w, null);
String pluginPushOptionsHelp =
StreamSupport.stream(pluginPushOptions.entries().spliterator(), /* parallel= */ false)
.map(
e ->
String.format(
"-o %s~%s: %s",
e.getPluginName(), e.get().getName(), e.get().getDescription()))
.sorted()
.collect(joining("\n"));
if (!pluginPushOptionsHelp.isEmpty()) {
w.write("\nPlugin push options:\n" + pluginPushOptionsHelp);
}
addMessage(w.toString());
reject(cmd, "see help");
return;
}
if (projectState.isAllUsers() && RefNames.REFS_USERS_SELF.equals(ref)) {
logger.atFine().log("Handling %s", RefNames.REFS_USERS_SELF);
ref = RefNames.refsUsers(user.getAccountId());
}
// Pushing changes for review usually requires that the target branch exists, but there is an
// exception for the branch to which HEAD points to and for refs/meta/config. Pushing for
// review to these branches is allowed even if the branch does not exist yet. This allows to
// push initial code for review to an empty repository and to review an initial project
// configuration.
if (receivePackRefCache.exactRef(ref) == null
&& !ref.equals(readHEAD(repo))
&& !ref.equals(RefNames.REFS_CONFIG)) {
logger.atFine().log("Ref %s not found", ref);
if (ref.startsWith(Constants.R_HEADS)) {
String n = ref.substring(Constants.R_HEADS.length());
reject(cmd, "branch " + n + " not found");
} else {
reject(cmd, ref + " not found");
}
return;
}
magicBranch.dest = BranchNameKey.create(project.getNameKey(), ref);
magicBranch.perm = permissions.ref(ref);
Optional<AuthException> err =
checkRefPermission(magicBranch.perm, RefPermission.READ)
.map(Optional::of)
.orElse(checkRefPermission(magicBranch.perm, RefPermission.CREATE_CHANGE));
if (err.isPresent()) {
rejectProhibited(cmd, err.get());
return;
}
if (magicBranch.isPrivate && magicBranch.removePrivate) {
reject(cmd, "the options 'private' and 'remove-private' are mutually exclusive");
return;
}
boolean privateByDefault =
projectCache
.get(project.getNameKey())
.orElseThrow(illegalState(project.getNameKey()))
.is(BooleanProjectConfig.PRIVATE_BY_DEFAULT);
setChangeAsPrivate =
magicBranch.isPrivate || (privateByDefault && !magicBranch.removePrivate);
if (receiveConfig.disablePrivateChanges && setChangeAsPrivate) {
reject(cmd, "private changes are disabled");
return;
}
if (magicBranch.workInProgress && magicBranch.ready) {
reject(cmd, "the options 'wip' and 'ready' are mutually exclusive");
return;
}
if (magicBranch.publishComments && magicBranch.noPublishComments) {
reject(
cmd, "the options 'publish-comments' and 'no-publish-comments' are mutually exclusive");
return;
}
if (magicBranch.submit) {
err = checkRefPermission(magicBranch.perm, RefPermission.UPDATE_BY_SUBMIT);
if (err.isPresent()) {
rejectProhibited(cmd, err.get());
return;
}
}
RevWalk walk = receivePack.getRevWalk();
RevCommit tip;
try {
tip = walk.parseCommit(magicBranch.cmd.getNewId());
logger.atFine().log("Tip of push: %s", tip.name());
} catch (IOException ex) {
magicBranch.cmd.setResult(REJECTED_MISSING_OBJECT);
logger.atSevere().withCause(ex).log(
"Invalid pack upload; one or more objects weren't sent");
return;
}
String destBranch = magicBranch.dest.branch();
try {
if (magicBranch.merged) {
if (magicBranch.base != null) {
reject(cmd, "cannot use merged with base");
return;
}
Ref refTip = receivePackRefCache.exactRef(magicBranch.dest.branch());
if (refTip == null) {
reject(cmd, magicBranch.dest.branch() + " not found");
return;
}
RevCommit branchTip = receivePack.getRevWalk().parseCommit(refTip.getObjectId());
if (!walk.isMergedInto(tip, branchTip)) {
reject(cmd, "not merged into branch");
return;
}
}
// If tip is a merge commit, or the root commit or
// if %base or %merged was specified, ignore newChangeForAllNotInTarget.
if (tip.getParentCount() > 1
|| magicBranch.base != null
|| magicBranch.merged
|| tip.getParentCount() == 0) {
logger.atFine().log("Forcing newChangeForAllNotInTarget = false");
newChangeForAllNotInTarget = false;
}
if (magicBranch.base != null) {
logger.atFine().log("Handling %%base: %s", magicBranch.base);
magicBranch.baseCommit = Lists.newArrayListWithCapacity(magicBranch.base.size());
for (ObjectId id : magicBranch.base) {
try {
magicBranch.baseCommit.add(walk.parseCommit(id));
} catch (IncorrectObjectTypeException notCommit) {
reject(cmd, "base must be a commit");
return;
} catch (MissingObjectException e) {
reject(cmd, "base not found");
return;
} catch (IOException e) {
throw new StorageException(
String.format("Project %s cannot read %s", project.getName(), id.name()), e);
}
}
} else if (newChangeForAllNotInTarget) {
Ref refTip = receivePackRefCache.exactRef(magicBranch.dest.branch());
if (refTip != null) {
RevCommit branchTip = receivePack.getRevWalk().parseCommit(refTip.getObjectId());
magicBranch.baseCommit = Collections.singletonList(branchTip);
logger.atFine().log("Set baseCommit = %s", magicBranch.baseCommit.get(0).name());
} else {
// The target branch does not exist. Usually pushing changes for review requires that
// the
// target branch exists, but there is an exception for the branch to which HEAD points
// to
// and for refs/meta/config. Pushing for review to these branches is allowed even if the
// branch does not exist yet. This allows to push initial code for review to an empty
// repository and to review an initial project configuration.
if (!ref.equals(readHEAD(repo)) && !ref.equals(RefNames.REFS_CONFIG)) {
reject(cmd, magicBranch.dest.branch() + " not found");
return;
}
}
}
} catch (IOException e) {
throw new StorageException(
String.format("Error walking to %s in project %s", destBranch, project.getName()), e);
}
if (validateConnected(magicBranch.cmd, magicBranch.dest, tip)) {
this.magicBranch = magicBranch;
this.result.magicPush(true);
}
}
}
private boolean isPluginPushOption(String pushOptionName) {
return StreamSupport.stream(pluginPushOptions.entries().spliterator(), /* parallel= */ false)
.anyMatch(e -> pushOptionName.equals(e.getPluginName() + "~" + e.get().getName()));
}
// Validate that the new commits are connected with the target
// branch. If they aren't, we want to abort. We do this check by
// looking to see if we can compute a merge base between the new
// commits and the target branch head.
private boolean validateConnected(ReceiveCommand cmd, BranchNameKey dest, RevCommit tip) {
try (TraceTimer traceTimer =
newTimer("validateConnected", Metadata.builder().branchName(dest.branch()))) {
RevWalk walk = receivePack.getRevWalk();
try {
Ref targetRef = receivePackRefCache.exactRef(dest.branch());
if (targetRef == null || targetRef.getObjectId() == null) {
// The destination branch does not yet exist. Assume the
// history being sent for review will start it and thus
// is "connected" to the branch.
logger.atFine().log("Branch is unborn");
// This is not an error condition.
return true;
}
RevCommit h = walk.parseCommit(targetRef.getObjectId());
logger.atFine().log("Current branch tip: %s", h.name());
RevFilter oldRevFilter = walk.getRevFilter();
try {
walk.reset();
walk.setRevFilter(RevFilter.MERGE_BASE);
walk.markStart(tip);
walk.markStart(h);
if (walk.next() == null) {
reject(cmd, "no common ancestry");
return false;
}
} finally {
walk.reset();
walk.setRevFilter(oldRevFilter);
}
} catch (IOException e) {
cmd.setResult(REJECTED_MISSING_OBJECT);
logger.atSevere().withCause(e).log("Invalid pack upload; one or more objects weren't sent");
return false;
}
return true;
}
}
private static String readHEAD(Repository repo) {
try {
String head = repo.getFullBranch();
logger.atFine().log("HEAD = %s", head);
return head;
} catch (IOException e) {
throw new StorageException("Cannot read HEAD symref", e);
}
}
/**
* Update an existing change. If draft comments are to be published, these are validated and may
* be withheld.
*
* @return True if the command succeeded, false if it was rejected.
*/
private boolean requestReplaceAndValidateComments(
ReceiveCommand cmd, boolean checkMergedInto, Change change, RevCommit newCommit)
throws IOException {
try (TraceTimer traceTimer = newTimer("requestReplaceAndValidateComments")) {
if (change.isClosed()) {
reject(
cmd,
changeFormatter.changeClosed(
ChangeReportFormatter.Input.builder().setChange(change).build()));
return false;
}
ReplaceRequest req = new ReplaceRequest(change.getId(), newCommit, cmd, checkMergedInto);
if (replaceByChange.containsKey(req.ontoChange)) {
reject(cmd, "duplicate request");
return false;
}
if (magicBranch != null && magicBranch.shouldPublishComments()) {
List<HumanComment> drafts =
commentsUtil.draftByChangeAuthor(
notesFactory.createChecked(change), user.getAccountId());
ImmutableList<CommentForValidation> draftsForValidation =
drafts.stream()
.map(
comment ->
CommentForValidation.create(
CommentSource.HUMAN,
comment.lineNbr > 0
? CommentType.INLINE_COMMENT
: CommentType.FILE_COMMENT,
comment.message,
comment.message.length()))
.collect(toImmutableList());
CommentValidationContext ctx =
CommentValidationContext.create(change.getChangeId(), change.getProject().get());
ImmutableList<CommentValidationFailure> commentValidationFailures =
PublishCommentUtil.findInvalidComments(ctx, commentValidators, draftsForValidation);
magicBranch.setWithholdComments(!commentValidationFailures.isEmpty());
commentValidationFailures.forEach(
failure ->
addMessage(
"Comment validation failure: " + failure.getMessage(),
ValidationMessage.Type.WARNING));
}
replaceByChange.put(req.ontoChange, req);
return true;
}
}
private void warnAboutMissingChangeId(List<CreateRequest> newChanges) {
for (CreateRequest create : newChanges) {
try {
receivePack.getRevWalk().parseBody(create.commit);
} catch (IOException e) {
throw new StorageException("Can't parse commit", e);
}
List<String> idList = ChangeUtil.getChangeIdsFromFooter(create.commit, urlFormatter.get());
if (idList.isEmpty()) {
messages.add(
new ValidationMessage("warning: pushing without Change-Id is deprecated", false));
break;
}
}
}
private List<CreateRequest> selectNewAndReplacedChangesFromMagicBranch(Task newProgress)
throws IOException {
try (TraceTimer traceTimer = newTimer("selectNewAndReplacedChangesFromMagicBranch")) {
logger.atFine().log("Finding new and replaced changes");
List<CreateRequest> newChanges = new ArrayList<>();
GroupCollector groupCollector =
GroupCollector.create(receivePackRefCache, psUtil, notesFactory, project.getNameKey());
BranchCommitValidator validator =
commitValidatorFactory.create(projectState, magicBranch.dest, user);
try {
RevCommit start = setUpWalkForSelectingChanges();
if (start == null) {
return Collections.emptyList();
}
LinkedHashMap<RevCommit, ChangeLookup> pending = new LinkedHashMap<>();
Set<Change.Key> newChangeIds = new HashSet<>();
int maxBatchChanges = receiveConfig.getEffectiveMaxBatchChangesLimit(user);
int total = 0;
int alreadyTracked = 0;
boolean rejectImplicitMerges =
start.getParentCount() == 1
&& projectCache
.get(project.getNameKey())
.orElseThrow(illegalState(project.getNameKey()))
.is(BooleanProjectConfig.REJECT_IMPLICIT_MERGES)
// Don't worry about implicit merges when creating changes for
// already-merged commits; they're already in history, so it's too
// late.
&& !magicBranch.merged;
Set<RevCommit> mergedParents;
if (rejectImplicitMerges) {
mergedParents = new HashSet<>();
} else {
mergedParents = null;
}
for (; ; ) {
RevCommit c = receivePack.getRevWalk().next();
if (c == null) {
break;
}
total++;
receivePack.getRevWalk().parseBody(c);
String name = c.name();
groupCollector.visit(c);
Collection<PatchSet.Id> existingPatchSets =
receivePackRefCache.patchSetIdsFromObjectId(c);
if (rejectImplicitMerges) {
Collections.addAll(mergedParents, c.getParents());
mergedParents.remove(c);
}
boolean commitAlreadyTracked = !existingPatchSets.isEmpty();
if (commitAlreadyTracked) {
alreadyTracked++;
// Corner cases where an existing commit might need a new group:
// A) Existing commit has a null group; wasn't assigned during schema
// upgrade, or schema upgrade is performed on a running server.
// B) Let A<-B<-C, then:
// 1. Push A to refs/heads/master
// 2. Push B to refs/for/master
// 3. Force push A~ to refs/heads/master
// 4. Push C to refs/for/master.
// B will be in existing so we aren't replacing the patch set. It
// used to have its own group, but now needs to to be changed to
// A's group.
// C) Commit is a PatchSet of a pre-existing change uploaded with a
// different target branch.
existingPatchSets.stream()
.forEach(i -> updateGroups.add(new UpdateGroupsRequest(i, c)));
if (!(newChangeForAllNotInTarget || magicBranch.base != null)) {
continue;
}
}
List<String> idList = ChangeUtil.getChangeIdsFromFooter(c, urlFormatter.get());
if (!idList.isEmpty()) {
pending.put(c, lookupByChangeKey(c, Change.key(idList.get(idList.size() - 1).trim())));
} else {
pending.put(c, lookupByCommit(c));
}
int n = pending.size() + newChanges.size();
if (maxBatchChanges != 0 && n > maxBatchChanges) {
logger.atFine().log("%d changes exceeds limit of %d", n, maxBatchChanges);
reject(
magicBranch.cmd,
"the number of pushed changes in a batch exceeds the max limit " + maxBatchChanges);
return Collections.emptyList();
}
if (commitAlreadyTracked) {
boolean changeExistsOnDestBranch = false;
for (ChangeData cd : pending.get(c).destChanges) {
if (cd.change().getDest().equals(magicBranch.dest)) {
changeExistsOnDestBranch = true;
break;
}
}
if (changeExistsOnDestBranch) {
continue;
}
logger.atFine().log(
"Creating new change for %s even though it is already tracked", name);
}
BranchCommitValidator.Result validationResult =
validator.validateCommit(
repo,
receivePack.getRevWalk().getObjectReader(),
magicBranch.cmd,
c,
ImmutableListMultimap.copyOf(pushOptions),
magicBranch.merged,
rejectCommits,
null);
messages.addAll(validationResult.messages());
if (!validationResult.isValid()) {
// Not a change the user can propose? Abort as early as possible.
logger.atFine().log("Aborting early due to invalid commit");
return Collections.emptyList();
}
// Don't allow merges to be uploaded in commit chain via all-not-in-target
if (newChangeForAllNotInTarget && c.getParentCount() > 1) {
reject(
magicBranch.cmd,
"Pushing merges in commit chains with 'all not in target' is not allowed,\n"
+ "to override please set the base manually");
logger.atFine().log("Rejecting merge commit %s with newChangeForAllNotInTarget", name);
// TODO(dborowitz): Should we early return here?
}
if (idList.isEmpty()) {
newChanges.add(new CreateRequest(c, magicBranch.dest.branch(), newProgress));
continue;
}
}
logger.atFine().log(
"Finished initial RevWalk with %d commits total: %d already"
+ " tracked, %d new changes with no Change-Id, and %d deferred"
+ " lookups",
total, alreadyTracked, newChanges.size(), pending.size());
if (rejectImplicitMerges) {
rejectImplicitMerges(mergedParents);
}
for (Iterator<ChangeLookup> itr = pending.values().iterator(); itr.hasNext(); ) {
ChangeLookup p = itr.next();
if (p.changeKey == null) {
continue;
}
if (newChangeIds.contains(p.changeKey)) {
logger.atFine().log("Multiple commits with Change-Id %s", p.changeKey);
reject(magicBranch.cmd, SAME_CHANGE_ID_IN_MULTIPLE_CHANGES);
return Collections.emptyList();
}
List<ChangeData> changes = p.destChanges;
if (changes.size() > 1) {
logger.atFine().log(
"Multiple changes in branch %s with Change-Id %s: %s",
magicBranch.dest,
p.changeKey,
changes.stream().map(cd -> cd.getId().toString()).collect(joining()));
// WTF, multiple changes in this branch have the same key?
// Since the commit is new, the user should recreate it with
// a different Change-Id. In practice, we should never see
// this error message as Change-Id should be unique per branch.
//
reject(magicBranch.cmd, p.changeKey.get() + " has duplicates");
return Collections.emptyList();
}
if (changes.size() == 1) {
// Schedule as a replacement to this one matching change.
//
ObjectId currentPs = changes.get(0).currentPatchSet().commitId();
// If Commit is already current PatchSet of target Change.
if (p.commit.equals(currentPs)) {
if (pending.size() == 1) {
// There are no commits left to check, all commits in pending were already
// current PatchSet of the corresponding target changes.
reject(magicBranch.cmd, "commit(s) already exists (as current patchset)");
} else {
// Commit is already current PatchSet.
// Remove from pending and try next commit.
itr.remove();
continue;
}
}
if (requestReplaceAndValidateComments(
magicBranch.cmd, false, changes.get(0).change(), p.commit)) {
continue;
}
return Collections.emptyList();
}
if (changes.isEmpty()) {
if (!isValidChangeId(p.changeKey.get())) {
reject(magicBranch.cmd, "invalid Change-Id");
return Collections.emptyList();
}
// In case the change look up from the index failed,
// double check against the existing refs
if (foundInExistingPatchSets(receivePackRefCache.patchSetIdsFromObjectId(p.commit))) {
if (pending.size() == 1) {
reject(magicBranch.cmd, "commit(s) already exists (as current patchset)");
return Collections.emptyList();
}
itr.remove();
continue;
}
newChangeIds.add(p.changeKey);
}
newChanges.add(new CreateRequest(p.commit, magicBranch.dest.branch(), newProgress));
}
logger.atFine().log(
"Finished deferred lookups with %d updates and %d new changes",
replaceByChange.size(), newChanges.size());
} catch (IOException e) {
// Should never happen, the core receive process would have
// identified the missing object earlier before we got control.
throw new StorageException("Invalid pack upload; one or more objects weren't sent", e);
}
if (newChanges.isEmpty() && replaceByChange.isEmpty()) {
reject(magicBranch.cmd, "no new changes");
return Collections.emptyList();
}
if (!newChanges.isEmpty() && magicBranch.edit) {
reject(magicBranch.cmd, "edit is not supported for new changes");
return newChanges;
}
SortedSetMultimap<ObjectId, String> groups = groupCollector.getGroups();
List<Integer> newIds = seq.nextChangeIds(newChanges.size());
for (int i = 0; i < newChanges.size(); i++) {
CreateRequest create = newChanges.get(i);
create.setChangeId(newIds.get(i));
create.groups = ImmutableList.copyOf(groups.get(create.commit));
}
for (ReplaceRequest replace : replaceByChange.values()) {
replace.groups = ImmutableList.copyOf(groups.get(replace.newCommitId));
}
for (UpdateGroupsRequest update : updateGroups) {
update.groups = ImmutableList.copyOf((groups.get(update.commit)));
}
logger.atFine().log("Finished updating groups from GroupCollector");
return newChanges;
}
}
private boolean foundInExistingPatchSets(Collection<PatchSet.Id> existingPatchSets) {
try (TraceTimer traceTimer = newTimer("foundInExistingPatchSet")) {
for (PatchSet.Id psId : existingPatchSets) {
ChangeNotes notes = notesFactory.create(project.getNameKey(), psId.changeId());
Change change = notes.getChange();
if (change.getDest().equals(magicBranch.dest)) {
logger.atFine().log("Found change %s from existing refs.", change.getKey());
// Reindex the change asynchronously, ignoring errors.
@SuppressWarnings("unused")
Future<?> possiblyIgnoredError = indexer.indexAsync(project.getNameKey(), change.getId());
return true;
}
}
return false;
}
}
private RevCommit setUpWalkForSelectingChanges() throws IOException {
try (TraceTimer traceTimer = newTimer("setUpWalkForSelectingChanges")) {
RevWalk rw = receivePack.getRevWalk();
RevCommit start = rw.parseCommit(magicBranch.cmd.getNewId());
rw.reset();
rw.sort(RevSort.TOPO);
rw.sort(RevSort.REVERSE, true);
receivePack.getRevWalk().markStart(start);
if (magicBranch.baseCommit != null) {
markExplicitBasesUninteresting();
} else if (magicBranch.merged) {
logger.atFine().log("Marking parents of merged commit %s uninteresting", start.name());
for (RevCommit c : start.getParents()) {
rw.markUninteresting(c);
}
} else {
markHeadsAsUninteresting(rw, magicBranch.dest != null ? magicBranch.dest.branch() : null);
}
return start;
}
}
private void markExplicitBasesUninteresting() throws IOException {
try (TraceTimer traceTimer = newTimer("markExplicitBasesUninteresting")) {
logger.atFine().log("Marking %d base commits uninteresting", magicBranch.baseCommit.size());
for (RevCommit c : magicBranch.baseCommit) {
receivePack.getRevWalk().markUninteresting(c);
}
Ref targetRef = receivePackRefCache.exactRef(magicBranch.dest.branch());
if (targetRef != null) {
logger.atFine().log(
"Marking target ref %s (%s) uninteresting",
magicBranch.dest.branch(), targetRef.getObjectId().name());
receivePack
.getRevWalk()
.markUninteresting(receivePack.getRevWalk().parseCommit(targetRef.getObjectId()));
}
}
}
private void rejectImplicitMerges(Set<RevCommit> mergedParents) throws IOException {
try (TraceTimer traceTimer = newTimer("rejectImplicitMerges")) {
if (!mergedParents.isEmpty()) {
Ref targetRef = receivePackRefCache.exactRef(magicBranch.dest.branch());
if (targetRef != null) {
RevWalk rw = receivePack.getRevWalk();
RevCommit tip = rw.parseCommit(targetRef.getObjectId());
boolean containsImplicitMerges = true;
for (RevCommit p : mergedParents) {
containsImplicitMerges &= !rw.isMergedInto(p, tip);
}
if (containsImplicitMerges) {
rw.reset();
for (RevCommit p : mergedParents) {
rw.markStart(p);
}
rw.markUninteresting(tip);
RevCommit c;
while ((c = rw.next()) != null) {
rw.parseBody(c);
messages.add(
new CommitValidationMessage(
"Implicit Merge of "
+ abbreviateName(c, rw.getObjectReader())
+ " "
+ c.getShortMessage(),
ValidationMessage.Type.ERROR));
}
reject(magicBranch.cmd, "implicit merges detected");
}
}
}
}
}
// Mark all branch tips as uninteresting in the given revwalk,
// so we get only the new commits when walking rw.
private void markHeadsAsUninteresting(RevWalk rw, @Nullable String forRef) throws IOException {
try (TraceTimer traceTimer =
newTimer("markHeadsAsUninteresting", Metadata.builder().branchName(forRef))) {
int i = 0;
for (Ref ref :
Iterables.concat(
receivePackRefCache.byPrefix(R_HEADS),
Collections.singletonList(receivePackRefCache.exactRef(forRef)))) {
if (ref != null && ref.getObjectId() != null) {
try {
rw.markUninteresting(rw.parseCommit(ref.getObjectId()));
i++;
} catch (IOException e) {
logger.atWarning().withCause(e).log(
"Invalid ref %s in %s", ref.getName(), project.getName());
}
}
}
logger.atFine().log("Marked %d heads as uninteresting", i);
}
}
private static boolean isValidChangeId(String idStr) {
return idStr.matches("^I[0-9a-fA-F]{40}$") && !idStr.matches("^I00*$");
}
private static class ChangeLookup {
final RevCommit commit;
@Nullable final Change.Key changeKey;
final List<ChangeData> destChanges;
ChangeLookup(RevCommit c, @Nullable Change.Key key, final List<ChangeData> destChanges) {
this.commit = c;
this.changeKey = key;
this.destChanges = destChanges;
}
}
private ChangeLookup lookupByChangeKey(RevCommit c, Change.Key key) {
try (TraceTimer traceTimer = newTimer("lookupByChangeKey")) {
return new ChangeLookup(c, key, queryProvider.get().byBranchKey(magicBranch.dest, key));
}
}
private ChangeLookup lookupByCommit(RevCommit c) {
try (TraceTimer traceTimer = newTimer("lookupByCommit")) {
return new ChangeLookup(
c, null, queryProvider.get().byBranchCommit(magicBranch.dest, c.getName()));
}
}
/** Represents a commit for which a Change should be created. */
private class CreateRequest {
final RevCommit commit;
final Task progress;
final String refName;
Change.Id changeId;
ReceiveCommand cmd;
ChangeInserter ins;
List<String> groups = ImmutableList.of();
Change change;
CreateRequest(RevCommit commit, String refName, Task progress) {
this.commit = commit;
this.refName = refName;
this.progress = progress;
}
private void setChangeId(int id) {
try (TraceTimer traceTimer = newTimer(CreateRequest.class, "setChangeId")) {
changeId = Change.id(id);
ins =
changeInserterFactory
.create(changeId, commit, refName)
.setTopic(magicBranch.topic)
.setPrivate(setChangeAsPrivate)
.setWorkInProgress(magicBranch.shouldSetWorkInProgressOnNewChanges())
// Changes already validated in validateNewCommits.
.setValidate(false);
if (magicBranch.merged) {
ins.setStatus(Change.Status.MERGED);
}
cmd = new ReceiveCommand(ObjectId.zeroId(), commit, ins.getPatchSetId().toRefName());
if (receivePack.getPushCertificate() != null) {
ins.setPushCertificate(receivePack.getPushCertificate().toTextWithSignature());
}
}
}
private void addOps(BatchUpdate bu) throws RestApiException {
try (TraceTimer traceTimer = newTimer(CreateRequest.class, "addOps")) {
checkState(changeId != null, "must call setChangeId before addOps");
try {
RevWalk rw = receivePack.getRevWalk();
rw.parseBody(commit);
final PatchSet.Id psId = ins.setGroups(groups).getPatchSetId();
Account.Id me = user.getAccountId();
List<FooterLine> footerLines = commit.getFooterLines();
requireNonNull(magicBranch);
// TODO(dborowitz): Support reviewers by email from footers? Maybe not: kernel developers
// with AOSP accounts already complain about these notifications, and that would make it
// worse. Might be better to get rid of the feature entirely:
// https://groups.google.com/d/topic/repo-discuss/tIFxY7L4DXk/discussion
MailRecipients fromFooters = getRecipientsFromFooters(accountResolver, footerLines);
fromFooters.remove(me);
Map<String, Short> approvals = magicBranch.labels;
StringBuilder msg =
new StringBuilder(
ApprovalsUtil.renderMessageWithApprovals(
psId.get(), approvals, Collections.emptyMap()));
msg.append('.');
if (!Strings.isNullOrEmpty(magicBranch.message)) {
msg.append("\n").append(magicBranch.message);
}
bu.setNotify(magicBranch.getNotifyForNewChange());
bu.insertChange(
ins.setReviewersAndCcsAsStrings(
magicBranch.getCombinedReviewers(fromFooters),
magicBranch.getCombinedCcs(fromFooters))
.setApprovals(approvals)
.setMessage(msg.toString())
.setRequestScopePropagator(requestScopePropagator)
.setSendMail(true)
.setPatchSetDescription(magicBranch.message));
if (!magicBranch.hashtags.isEmpty()) {
// Any change owner is allowed to add hashtags when creating a change.
bu.addOp(
changeId,
hashtagsFactory
.create(new HashtagsInput(magicBranch.hashtags))
.setFireEvent(false));
}
if (!Strings.isNullOrEmpty(magicBranch.topic)) {
bu.addOp(changeId, setTopicFactory.create(magicBranch.topic));
}
bu.addOp(
changeId,
new BatchUpdateOp() {
@Override
public boolean updateChange(ChangeContext ctx) {
CreateRequest.this.change = ctx.getChange();
return false;
}
});
bu.addOp(changeId, new ChangeProgressOp(progress));
} catch (Exception e) {
throw asRestApiException(e);
}
}
}
}
private void submit(Collection<CreateRequest> create, Collection<ReplaceRequest> replace)
throws RestApiException, UpdateException, IOException, ConfigInvalidException,
PermissionBackendException {
try (TraceTimer traceTimer = newTimer("submit")) {
Map<ObjectId, Change> bySha = Maps.newHashMapWithExpectedSize(create.size() + replace.size());
for (CreateRequest r : create) {
requireNonNull(
r.change,
() -> String.format("cannot submit new change %s; op may not have run", r.changeId));
bySha.put(r.commit, r.change);
}
for (ReplaceRequest r : replace) {
bySha.put(r.newCommitId, r.notes.getChange());
}
Change tipChange = bySha.get(magicBranch.cmd.getNewId());
requireNonNull(
tipChange,
() ->
String.format(
"tip of push does not correspond to a change; found these changes: %s", bySha));
logger.atFine().log(
"Processing submit with tip change %s (%s)",
tipChange.getId(), magicBranch.cmd.getNewId());
try (MergeOp op = mergeOpProvider.get()) {
SubmitInput submitInput = new SubmitInput();
submitInput.notify = magicBranch.notifyHandling;
submitInput.notifyDetails = new HashMap<>();
submitInput.notifyDetails.put(
RecipientType.TO,
new NotifyInfo(magicBranch.notifyTo.stream().map(Object::toString).collect(toList())));
submitInput.notifyDetails.put(
RecipientType.CC,
new NotifyInfo(magicBranch.notifyCc.stream().map(Object::toString).collect(toList())));
submitInput.notifyDetails.put(
RecipientType.BCC,
new NotifyInfo(magicBranch.notifyBcc.stream().map(Object::toString).collect(toList())));
op.merge(tipChange, user, false, submitInput, false);
}
}
}
private void preparePatchSetsForReplace(List<CreateRequest> newChanges) {
try (TraceTimer traceTimer =
newTimer(
"preparePatchSetsForReplace", Metadata.builder().resourceCount(newChanges.size()))) {
try {
readChangesForReplace();
for (ReplaceRequest req : replaceByChange.values()) {
if (req.inputCommand.getResult() == NOT_ATTEMPTED) {
req.validateNewPatchSet();
}
}
} catch (IOException | PermissionBackendException e) {
throw new StorageException(
"Cannot read repository before replacement for project " + project.getName(), e);
}
logger.atFine().log("Read %d changes to replace", replaceByChange.size());
if (magicBranch != null && magicBranch.cmd.getResult() != NOT_ATTEMPTED) {
// Cancel creations tied to refs/for/ command.
for (ReplaceRequest req : replaceByChange.values()) {
if (req.inputCommand == magicBranch.cmd && req.cmd != null) {
req.cmd.setResult(ReceiveCommand.Result.REJECTED_OTHER_REASON, "aborted");
}
}
for (CreateRequest req : newChanges) {
req.cmd.setResult(ReceiveCommand.Result.REJECTED_OTHER_REASON, "aborted");
}
}
}
}
private void readChangesForReplace() {
try (TraceTimer traceTimer = newTimer("readChangesForReplace")) {
replaceByChange.values().stream()
.map(r -> r.ontoChange)
.map(id -> notesFactory.create(project.getNameKey(), id))
.forEach(notes -> replaceByChange.get(notes.getChangeId()).notes = notes);
}
}
/** Represents a commit that should be stored in a new patchset of an existing change. */
private class ReplaceRequest {
final Change.Id ontoChange;
final ObjectId newCommitId;
final ReceiveCommand inputCommand;
final boolean checkMergedInto;
RevCommit revCommit;
ChangeNotes notes;
BiMap<RevCommit, PatchSet.Id> revisions;
PatchSet.Id psId;
ReceiveCommand prev;
ReceiveCommand cmd;
PatchSetInfo info;
PatchSet.Id priorPatchSet;
List<String> groups = ImmutableList.of();
ReplaceOp replaceOp;
ReplaceRequest(
Change.Id toChange, RevCommit newCommit, ReceiveCommand cmd, boolean checkMergedInto)
throws IOException {
this.ontoChange = toChange;
this.newCommitId = newCommit.copy();
this.inputCommand = requireNonNull(cmd);
this.checkMergedInto = checkMergedInto;
try {
revCommit = receivePack.getRevWalk().parseCommit(newCommitId);
} catch (IOException e) {
revCommit = null;
}
revisions = HashBiMap.create();
for (Ref ref : receivePackRefCache.byPrefix(RefNames.changeRefPrefix(toChange))) {
try {
PatchSet.Id psId = PatchSet.Id.fromRef(ref.getName());
if (psId != null) {
revisions.forcePut(receivePack.getRevWalk().parseCommit(ref.getObjectId()), psId);
}
} catch (IOException err) {
logger.atWarning().withCause(err).log(
"Project %s contains invalid change ref %s", project.getName(), ref.getName());
}
}
}
/**
* Validate the new patch set commit for this change.
*
* <p><strong>Side effects:</strong>
*
* <ul>
* <li>May add error or warning messages to the progress monitor
* <li>Will reject {@code cmd} prior to returning false
* <li>May reset {@code receivePack.getRevWalk()}; do not call in the middle of a walk.
* </ul>
*
* @return whether the new commit is valid
* @throws IOException
* @throws PermissionBackendException
*/
boolean validateNewPatchSet() throws IOException, PermissionBackendException {
try (TraceTimer traceTimer = newTimer("validateNewPatchSet")) {
if (!validateNewPatchSetNoteDb()) {
return false;
}
sameTreeWarning();
if (magicBranch != null) {
validateMagicBranchWipStatusChange();
if (inputCommand.getResult() != NOT_ATTEMPTED) {
return false;
}
if (magicBranch.edit) {
return newEdit();
}
}
newPatchSet();
return true;
}
}
boolean validateNewPatchSetForAutoClose() throws IOException, PermissionBackendException {
if (!validateNewPatchSetNoteDb()) {
return false;
}
newPatchSet();
return true;
}
/** Validates the new PS against permissions and notedb status. */
private boolean validateNewPatchSetNoteDb() throws IOException, PermissionBackendException {
try (TraceTimer traceTimer = newTimer("validateNewPatchSetNoteDb")) {
if (notes == null) {
reject(inputCommand, "change " + ontoChange + " not found");
return false;
}
Change change = notes.getChange();
priorPatchSet = change.currentPatchSetId();
if (!revisions.containsValue(priorPatchSet)) {
logger.atWarning().log(
"Change %d is missing revision for patch set %s"
+ " (it has revisions for these patch sets: %s)",
change.getChangeId(),
priorPatchSet.getId(),
Iterables.toString(
revisions.values().stream()
.limit(100) // Enough for "normal" changes.
.map(PatchSet.Id::getId)
.collect(Collectors.toList())));
reject(inputCommand, "change " + ontoChange + " missing revisions");
return false;
}
RevCommit newCommit = receivePack.getRevWalk().parseCommit(newCommitId);
// Not allowed to create a new patch set if the current patch set is locked.
if (psUtil.isPatchSetLocked(notes)) {
reject(inputCommand, "cannot add patch set to " + ontoChange + ".");
return false;
}
try {
permissions.change(notes).check(ChangePermission.ADD_PATCH_SET);
} catch (AuthException no) {
reject(inputCommand, "cannot add patch set to " + ontoChange + ".");
return false;
}
if (change.isClosed()) {
reject(inputCommand, "change " + ontoChange + " closed");
return false;
} else if (revisions.containsKey(newCommit)) {
reject(inputCommand, "commit already exists (in the change)");
return false;
}
List<PatchSet.Id> existingPatchSetsWithSameCommit =
receivePackRefCache.patchSetIdsFromObjectId(newCommit);
if (!existingPatchSetsWithSameCommit.isEmpty()) {
// TODO(hiesel, hanwen): Remove this check entirely when Gerrit requires change IDs
// without the option to turn that off.
reject(
inputCommand,
"commit already exists (in the project): "
+ existingPatchSetsWithSameCommit.get(0).toRefName());
return false;
}
try (TraceTimer traceTimer2 = newTimer("validateNewPatchSetNoteDb#isMergedInto")) {
for (RevCommit prior : revisions.keySet()) {
// Don't allow a change to directly depend upon itself. This is a
// very common error due to users making a new commit rather than
// amending when trying to address review comments.
if (receivePack.getRevWalk().isMergedInto(prior, newCommit)) {
reject(inputCommand, SAME_CHANGE_ID_IN_MULTIPLE_CHANGES);
return false;
}
}
}
return true;
}
}
/** Validates whether the WIP change is allowed. Rejects inputCommand if not. */
private void validateMagicBranchWipStatusChange() throws PermissionBackendException {
Change change = notes.getChange();
if ((magicBranch.workInProgress || magicBranch.ready)
&& magicBranch.workInProgress != change.isWorkInProgress()
&& !user.getAccountId().equals(change.getOwner())) {
boolean hasWriteConfigPermission = false;
try {
permissions.check(ProjectPermission.WRITE_CONFIG);
hasWriteConfigPermission = true;
} catch (AuthException e) {
// Do nothing.
}
if (!hasWriteConfigPermission) {
try {
permissions.change(notes).check(ChangePermission.TOGGLE_WORK_IN_PROGRESS_STATE);
} catch (AuthException e1) {
reject(inputCommand, ONLY_USERS_WITH_TOGGLE_WIP_STATE_PERM_CAN_MODIFY_WIP);
}
}
}
}
/** prints a warning if the new PS has the same tree as the previous commit. */
private void sameTreeWarning() throws IOException {
try (TraceTimer traceTimer = newTimer("sameTreeWarning")) {
RevWalk rw = receivePack.getRevWalk();
RevCommit newCommit = rw.parseCommit(newCommitId);
RevCommit priorCommit = revisions.inverse().get(priorPatchSet);
if (newCommit.getTree().equals(priorCommit.getTree())) {
rw.parseBody(newCommit);
rw.parseBody(priorCommit);
boolean messageEq =
Objects.equals(newCommit.getFullMessage(), priorCommit.getFullMessage());
boolean parentsEq = parentsEqual(newCommit, priorCommit);
boolean authorEq = authorEqual(newCommit, priorCommit);
ObjectReader reader = receivePack.getRevWalk().getObjectReader();
if (messageEq && parentsEq && authorEq) {
addMessage(
String.format(
"warning: no changes between prior commit %s and new commit %s",
abbreviateName(priorCommit, reader), abbreviateName(newCommit, reader)));
} else {
StringBuilder msg = new StringBuilder();
msg.append("warning: ").append(abbreviateName(newCommit, reader));
msg.append(":");
msg.append(" no files changed");
if (!authorEq) {
msg.append(", author changed");
}
if (!messageEq) {
msg.append(", message updated");
}
if (!parentsEq) {
msg.append(", was rebased");
}
addMessage(msg.toString());
}
}
}
}
/**
* Sets cmd and prev to the ReceiveCommands for change edits. Returns false if there was a
* failure.
*/
private boolean newEdit() {
try (TraceTimer traceTimer = newTimer("newEdit")) {
psId = notes.getChange().currentPatchSetId();
Optional<ChangeEdit> edit;
try {
edit = editUtil.byChange(notes, user);
} catch (AuthException | IOException e) {
logger.atSevere().withCause(e).log("Cannot retrieve edit");
return false;
}
if (edit.isPresent()) {
if (edit.get().getBasePatchSet().id().equals(psId)) {
// replace edit
cmd =
new ReceiveCommand(
edit.get().getEditCommit(), newCommitId, edit.get().getRefName());
} else {
// delete old edit ref on rebase
prev =
new ReceiveCommand(
edit.get().getEditCommit(), ObjectId.zeroId(), edit.get().getRefName());
createEditCommand();
}
} else {
createEditCommand();
}
return true;
}
}
/** Creates a ReceiveCommand for a new edit. */
private void createEditCommand() {
cmd =
new ReceiveCommand(
ObjectId.zeroId(),
newCommitId,
RefNames.refsEdit(user.getAccountId(), notes.getChangeId(), psId));
}
/** Updates 'this' to add a new patchset. */
private void newPatchSet() throws IOException {
try (TraceTimer traceTimer = newTimer("newPatchSet")) {
RevCommit newCommit = receivePack.getRevWalk().parseCommit(newCommitId);
psId = nextPatchSetId(notes.getChange().currentPatchSetId());
info = patchSetInfoFactory.get(receivePack.getRevWalk(), newCommit, psId);
cmd = new ReceiveCommand(ObjectId.zeroId(), newCommitId, psId.toRefName());
}
}
private PatchSet.Id nextPatchSetId(PatchSet.Id psId) throws IOException {
PatchSet.Id next = ChangeUtil.nextPatchSetId(psId);
while (receivePackRefCache.exactRef(next.toRefName()) != null) {
next = ChangeUtil.nextPatchSetId(next);
}
return next;
}
void addOps(BatchUpdate bu, @Nullable Task progress) throws IOException {
try (TraceTimer traceTimer = newTimer("addOps")) {
if (magicBranch != null && magicBranch.edit) {
bu.addOp(notes.getChangeId(), new ReindexOnlyOp());
if (prev != null) {
bu.addRepoOnlyOp(new UpdateOneRefOp(prev));
}
bu.addRepoOnlyOp(new UpdateOneRefOp(cmd));
return;
}
RevWalk rw = receivePack.getRevWalk();
// TODO(dborowitz): Move to ReplaceOp#updateRepo.
RevCommit newCommit = rw.parseCommit(newCommitId);
rw.parseBody(newCommit);
RevCommit priorCommit = revisions.inverse().get(priorPatchSet);
replaceOp =
replaceOpFactory
.create(
projectState,
notes.getChange().getDest(),
checkMergedInto,
checkMergedInto ? inputCommand.getNewId().name() : null,
priorPatchSet,
priorCommit,
psId,
newCommit,
info,
groups,
magicBranch,
receivePack.getPushCertificate(),
notes.getChange())
.setRequestScopePropagator(requestScopePropagator);
bu.addOp(notes.getChangeId(), replaceOp);
if (progress != null) {
bu.addOp(notes.getChangeId(), new ChangeProgressOp(progress));
}
bu.addRepoOnlyOp(
new RepoOnlyOp() {
@Override
public void updateRepo(RepoContext ctx) throws Exception {
// Create auto merge ref if the new patch set is a merge commit. This is only
// required for new patch sets on existing changes as these do not go through
// PatchSetInserter. New changes pushed via git go through ChangeInserter and have
// their auto merge commits created there.
Optional<ReceiveCommand> autoMerge =
autoMerger.createAutoMergeCommitIfNecessary(
ctx.getRepoView(),
ctx.getRevWalk(),
ctx.getInserter(),
ctx.getRevWalk().parseCommit(newCommitId));
if (autoMerge.isPresent()) {
ctx.addRefUpdate(autoMerge.get());
}
}
});
}
}
String getRejectMessage() {
return replaceOp != null ? replaceOp.getRejectMessage() : null;
}
}
private class UpdateGroupsRequest {
final PatchSet.Id psId;
final RevCommit commit;
List<String> groups = ImmutableList.of();
UpdateGroupsRequest(PatchSet.Id psId, RevCommit commit) {
this.psId = psId;
this.commit = commit;
}
private void addOps(BatchUpdate bu) {
bu.addOp(
psId.changeId(),
new BatchUpdateOp() {
@Override
public boolean updateChange(ChangeContext ctx) {
PatchSet ps = psUtil.get(ctx.getNotes(), psId);
List<String> oldGroups = ps.groups();
if (oldGroups == null) {
if (groups == null) {
return false;
}
} else if (sameGroups(oldGroups, groups)) {
return false;
}
ctx.getUpdate(psId).setGroups(groups);
return true;
}
});
}
private boolean sameGroups(List<String> a, List<String> b) {
return Sets.newHashSet(a).equals(Sets.newHashSet(b));
}
}
private class UpdateOneRefOp implements RepoOnlyOp {
final ReceiveCommand cmd;
private UpdateOneRefOp(ReceiveCommand cmd) {
this.cmd = requireNonNull(cmd);
}
@Override
public void updateRepo(RepoContext ctx) throws IOException {
ctx.addRefUpdate(cmd);
}
@Override
public void postUpdate(PostUpdateContext ctx) {
String refName = cmd.getRefName();
if (cmd.getType() == ReceiveCommand.Type.UPDATE) { // aka fast-forward
logger.atFine().log("Updating tag cache on fast-forward of %s", cmd.getRefName());
tagCache.updateFastForward(project.getNameKey(), refName, cmd.getOldId(), cmd.getNewId());
}
if (isConfig(cmd)) {
logger.atFine().log("Reloading project in cache");
projectCache.evict(project);
ProjectState ps =
projectCache.get(project.getNameKey()).orElseThrow(illegalState(project.getNameKey()));
try {
logger.atFine().log("Updating project description");
repo.setGitwebDescription(ps.getProject().getDescription());
} catch (IOException e) {
throw new StorageException("cannot update description of " + project.getName(), e);
}
if (allProjectsName.equals(project.getNameKey())) {
try {
createGroupPermissionSyncer.syncIfNeeded();
} catch (IOException | ConfigInvalidException e) {
throw new StorageException("cannot update description of " + project.getName(), e);
}
}
}
}
}
private static class ReindexOnlyOp implements BatchUpdateOp {
@Override
public boolean updateChange(ChangeContext ctx) {
// Trigger reindexing even though change isn't actually updated.
return true;
}
}
private static boolean parentsEqual(RevCommit a, RevCommit b) {
if (a.getParentCount() != b.getParentCount()) {
return false;
}
for (int i = 0; i < a.getParentCount(); i++) {
if (!a.getParent(i).equals(b.getParent(i))) {
return false;
}
}
return true;
}
private static boolean authorEqual(RevCommit a, RevCommit b) {
PersonIdent aAuthor = a.getAuthorIdent();
PersonIdent bAuthor = b.getAuthorIdent();
if (aAuthor == null && bAuthor == null) {
return true;
} else if (aAuthor == null || bAuthor == null) {
return false;
}
return Objects.equals(aAuthor.getName(), bAuthor.getName())
&& Objects.equals(aAuthor.getEmailAddress(), bAuthor.getEmailAddress());
}
// Run RefValidators on the command. If any validator fails, the command status is set to
// REJECTED, and the return value is 'false'
private boolean validRefOperation(ReceiveCommand cmd) {
try (TraceTimer traceTimer = newTimer("validRefOperation")) {
RefOperationValidators refValidators = refValidatorsFactory.create(getProject(), user, cmd);
try {
messages.addAll(refValidators.validateForRefOperation());
} catch (RefOperationValidationException e) {
messages.addAll(e.getMessages());
reject(cmd, e.getMessage());
return false;
}
return true;
}
}
/**
* Validates the commits that a regular push brings in.
*
* <p>On validation failure, the command is rejected.
*/
private void validateRegularPushCommits(BranchNameKey branch, ReceiveCommand cmd)
throws PermissionBackendException {
try (TraceTimer traceTimer =
newTimer("validateRegularPushCommits", Metadata.builder().branchName(branch.branch()))) {
boolean skipValidation =
!RefNames.REFS_CONFIG.equals(cmd.getRefName())
&& !(MagicBranch.isMagicBranch(cmd.getRefName())
|| NEW_PATCHSET_PATTERN.matcher(cmd.getRefName()).matches())
&& pushOptions.containsKey(PUSH_OPTION_SKIP_VALIDATION);
if (skipValidation) {
if (projectState.is(BooleanProjectConfig.USE_SIGNED_OFF_BY)) {
reject(cmd, "requireSignedOffBy prevents option " + PUSH_OPTION_SKIP_VALIDATION);
return;
}
Optional<AuthException> err =
checkRefPermission(permissions.ref(branch.branch()), RefPermission.SKIP_VALIDATION);
if (err.isPresent()) {
rejectProhibited(cmd, err.get());
return;
}
if (!Iterables.isEmpty(rejectCommits)) {
reject(cmd, "reject-commits prevents " + PUSH_OPTION_SKIP_VALIDATION);
}
}
BranchCommitValidator validator = commitValidatorFactory.create(projectState, branch, user);
RevWalk walk = receivePack.getRevWalk();
walk.reset();
walk.sort(RevSort.NONE);
try {
RevObject parsedObject = walk.parseAny(cmd.getNewId());
if (!(parsedObject instanceof RevCommit)) {
return;
}
walk.markStart((RevCommit) parsedObject);
markHeadsAsUninteresting(walk, cmd.getRefName());
int limit = receiveConfig.maxBatchCommits;
int n = 0;
for (RevCommit c; (c = walk.next()) != null; ) {
// Even if skipValidation is set, we still get here when at least one plugin
// commit validator requires to validate all commits. In this case, however,
// we don't need to check the commit limit.
if (++n > limit && !skipValidation) {
logger.atFine().log("Number of new commits exceeds limit of %d", limit);
reject(
cmd,
String.format(
"more than %d commits, and %s not set", limit, PUSH_OPTION_SKIP_VALIDATION));
return;
}
if (!receivePackRefCache.patchSetIdsFromObjectId(c).isEmpty()) {
continue;
}
BranchCommitValidator.Result validationResult =
validator.validateCommit(
repo,
walk.getObjectReader(),
cmd,
c,
ImmutableListMultimap.copyOf(pushOptions),
false,
rejectCommits,
null,
skipValidation);
messages.addAll(validationResult.messages());
if (!validationResult.isValid()) {
break;
}
}
logger.atFine().log("Validated %d new commits", n);
} catch (IOException err) {
cmd.setResult(REJECTED_MISSING_OBJECT);
logger.atSevere().withCause(err).log(
"Invalid pack upload; one or more objects weren't sent");
}
}
}
private void autoCloseChanges(ReceiveCommand cmd, Task progress) {
try (TraceTimer traceTimer = newTimer("autoCloseChanges")) {
logger.atFine().log("Starting auto-closing of changes");
String refName = cmd.getRefName();
Set<Change.Id> ids = new HashSet<>();
// TODO(dborowitz): Combine this BatchUpdate with the main one in
// handleRegularCommands
try {
retryHelper
.changeUpdate(
"autoCloseChanges",
updateFactory -> {
try (BatchUpdate bu =
updateFactory.create(projectState.getNameKey(), user, TimeUtil.nowTs());
ObjectInserter ins = repo.newObjectInserter();
ObjectReader reader = ins.newReader();
RevWalk rw = new RevWalk(reader)) {
if (ObjectId.zeroId().equals(cmd.getOldId())) {
// The user is creating a new branch. The branch can't contain any changes, so
// auto-closing doesn't apply. Exiting here early to spare any further,
// potentially expensive computation that loop over all commits.
return null;
}
bu.setRepository(repo, rw, ins);
// TODO(dborowitz): Teach BatchUpdate to ignore missing changes.
RevCommit newTip = rw.parseCommit(cmd.getNewId());
BranchNameKey branch = BranchNameKey.create(project.getNameKey(), refName);
rw.reset();
rw.sort(RevSort.REVERSE);
rw.markStart(newTip);
rw.markUninteresting(rw.parseCommit(cmd.getOldId()));
Map<Change.Key, ChangeNotes> byKey = null;
List<ReplaceRequest> replaceAndClose = new ArrayList<>();
int existingPatchSets = 0;
int newPatchSets = 0;
SubmissionId submissionId = null;
COMMIT:
for (RevCommit c; (c = rw.next()) != null; ) {
rw.parseBody(c);
// Check if change refs point to this commit. Usually there are 0-1 change
// refs pointing to this commit.
for (PatchSet.Id psId :
receivePackRefCache.patchSetIdsFromObjectId(c.copy())) {
Optional<ChangeNotes> notes = getChangeNotes(psId.changeId());
if (notes.isPresent() && notes.get().getChange().getDest().equals(branch)) {
if (submissionId == null) {
submissionId = new SubmissionId(notes.get().getChange());
}
existingPatchSets++;
bu.addOp(
notes.get().getChangeId(), setPrivateOpFactory.create(false, null));
bu.addOp(
psId.changeId(),
mergedByPushOpFactory.create(
requestScopePropagator,
psId,
submissionId,
refName,
newTip.getId().getName()));
continue COMMIT;
}
}
for (String changeId :
ChangeUtil.getChangeIdsFromFooter(c, urlFormatter.get())) {
if (byKey == null) {
byKey =
retryHelper
.changeIndexQuery(
"queryOpenChangesByKeyByBranch",
q -> openChangesByKeyByBranch(q, branch))
.call();
}
ChangeNotes onto = byKey.get(Change.key(changeId.trim()));
if (onto != null) {
newPatchSets++;
// Hold onto this until we're done with the walk, as the call to
// req.validate below calls isMergedInto which resets the walk.
ReplaceRequest req =
new ReplaceRequest(onto.getChangeId(), c, cmd, false);
req.notes = onto;
replaceAndClose.add(req);
continue COMMIT;
}
}
}
for (ReplaceRequest req : replaceAndClose) {
Change.Id id = req.notes.getChangeId();
if (!req.validateNewPatchSetForAutoClose()) {
logger.atFine().log("Not closing %s because validation failed", id);
continue;
}
if (submissionId == null) {
submissionId = new SubmissionId(req.notes.getChange());
}
req.addOps(bu, null);
bu.addOp(id, setPrivateOpFactory.create(false, null));
bu.addOp(
id,
mergedByPushOpFactory
.create(
requestScopePropagator,
req.psId,
submissionId,
refName,
newTip.getId().getName())
.setPatchSetProvider(req.replaceOp::getPatchSet));
bu.addOp(id, new ChangeProgressOp(progress));
ids.add(id);
}
logger.atFine().log(
"Auto-closing %d changes with existing patch sets and %d with new patch"
+ " sets",
existingPatchSets, newPatchSets);
bu.execute();
} catch (IOException | StorageException | PermissionBackendException e) {
throw new StorageException("Failed to auto-close changes", e);
}
// If we are here, we didn't throw UpdateException. Record the result.
// The ordering is indeterminate due to the HashSet; unfortunately, Change.Id
// doesn't
// fit into TreeSet.
ids.stream()
.forEach(
id -> result.addChange(ReceiveCommitsResult.ChangeStatus.AUTOCLOSED, id));
return null;
})
// Use a multiple of the default timeout to account for inner retries that may otherwise
// eat up the whole timeout so that no time is left to retry this outer action.
.defaultTimeoutMultiplier(5)
.call();
} catch (RestApiException e) {
logger.atSevere().withCause(e).log("Can't insert patchset");
} catch (UpdateException e) {
logger.atSevere().withCause(e).log("Failed to auto-close changes");
} finally {
logger.atFine().log("Done auto-closing changes");
}
}
}
private Optional<ChangeNotes> getChangeNotes(Change.Id changeId) {
try {
return Optional.of(notesFactory.createChecked(project.getNameKey(), changeId));
} catch (NoSuchChangeException e) {
return Optional.empty();
}
}
private Map<Change.Key, ChangeNotes> openChangesByKeyByBranch(
InternalChangeQuery internalChangeQuery, BranchNameKey branch) {
try (TraceTimer traceTimer =
newTimer("openChangesByKeyByBranch", Metadata.builder().branchName(branch.branch()))) {
Map<Change.Key, ChangeNotes> r = new HashMap<>();
for (ChangeData cd : internalChangeQuery.byBranchOpen(branch)) {
try {
r.put(cd.change().getKey(), cd.notes());
} catch (NoSuchChangeException e) {
// Ignore deleted change
}
}
return r;
}
}
private TraceTimer newTimer(String name) {
return newTimer(getClass(), name);
}
private TraceTimer newTimer(Class<?> clazz, String name) {
return newTimer(clazz, name, Metadata.builder());
}
private TraceTimer newTimer(String name, Metadata.Builder metadataBuilder) {
return newTimer(getClass(), name, metadataBuilder);
}
private TraceTimer newTimer(Class<?> clazz, String name, Metadata.Builder metadataBuilder) {
metadataBuilder.projectName(project.getName());
return TraceContext.newTimer(clazz.getSimpleName() + "#" + name, metadataBuilder.build());
}
private static void reject(ReceiveCommand cmd, String why) {
logger.atFine().log("Rejecting command '%s': %s", cmd, why);
cmd.setResult(REJECTED_OTHER_REASON, why);
}
private static void rejectRemaining(Collection<ReceiveCommand> commands, String why) {
rejectRemaining(commands.stream(), why);
}
private static void rejectRemaining(Stream<ReceiveCommand> commands, String why) {
commands.filter(cmd -> cmd.getResult() == NOT_ATTEMPTED).forEach(cmd -> reject(cmd, why));
}
private static boolean isHead(ReceiveCommand cmd) {
return cmd.getRefName().startsWith(Constants.R_HEADS);
}
private static boolean isConfig(ReceiveCommand cmd) {
return cmd.getRefName().equals(RefNames.REFS_CONFIG);
}
private static String commandToString(ReceiveCommand cmd) {
StringBuilder b = new StringBuilder();
b.append(cmd);
b.append(" (").append(cmd.getResult());
if (cmd.getMessage() != null) {
b.append(": ").append(cmd.getMessage());
}
b.append(")\n");
return b.toString();
}
}