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// Copyright (C) 2015 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.project;
import static java.lang.String.format;
import com.google.common.collect.Lists;
import com.google.gerrit.extensions.api.projects.DeleteBranchesInput;
import com.google.gerrit.extensions.restapi.ResourceConflictException;
import com.google.gerrit.extensions.restapi.Response;
import com.google.gerrit.extensions.restapi.RestModifyView;
import com.google.gerrit.reviewdb.client.Branch;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.extensions.events.GitReferenceUpdated;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gerrit.server.query.change.InternalChangeQuery;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import org.eclipse.jgit.lib.BatchRefUpdate;
import org.eclipse.jgit.lib.NullProgressMonitor;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.RefUpdate;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.transport.ReceiveCommand;
import org.eclipse.jgit.transport.ReceiveCommand.Result;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
@Singleton
public class DeleteBranches
implements RestModifyView<ProjectResource, DeleteBranchesInput> {
private static final Logger log = LoggerFactory.getLogger(DeleteBranches.class);
private final Provider<IdentifiedUser> identifiedUser;
private final GitRepositoryManager repoManager;
private final Provider<InternalChangeQuery> queryProvider;
private final GitReferenceUpdated referenceUpdated;
private final RefValidationHelper refDeletionValidator;
@Inject
DeleteBranches(Provider<IdentifiedUser> identifiedUser,
GitRepositoryManager repoManager,
Provider<InternalChangeQuery> queryProvider,
GitReferenceUpdated referenceUpdated,
RefValidationHelper.Factory refHelperFactory) {
this.identifiedUser = identifiedUser;
this.repoManager = repoManager;
this.queryProvider = queryProvider;
this.referenceUpdated = referenceUpdated;
this.refDeletionValidator =
refHelperFactory.create(ReceiveCommand.Type.DELETE);
}
@Override
public Response<?> apply(ProjectResource project, DeleteBranchesInput input)
throws OrmException, IOException, ResourceConflictException {
if (input == null) {
input = new DeleteBranchesInput();
}
if (input.branches == null) {
input.branches = Lists.newArrayListWithCapacity(1);
}
try (Repository r = repoManager.openRepository(project.getNameKey())) {
BatchRefUpdate batchUpdate = r.getRefDatabase().newBatchUpdate();
for (String branch : input.branches) {
batchUpdate.addCommand(createDeleteCommand(project, r, branch));
}
try (RevWalk rw = new RevWalk(r)) {
batchUpdate.execute(rw, NullProgressMonitor.INSTANCE);
}
StringBuilder errorMessages = new StringBuilder();
for (ReceiveCommand command : batchUpdate.getCommands()) {
if (command.getResult() == Result.OK) {
postDeletion(project, command);
} else {
appendAndLogErrorMessage(errorMessages, command);
}
}
if (errorMessages.length() > 0) {
throw new ResourceConflictException(errorMessages.toString());
}
}
return Response.none();
}
private ReceiveCommand createDeleteCommand(ProjectResource project,
Repository r, String branch)
throws OrmException, IOException, ResourceConflictException {
Ref ref = r.getRefDatabase().getRef(branch);
ReceiveCommand command;
if (ref == null) {
command = new ReceiveCommand(ObjectId.zeroId(), ObjectId.zeroId(), branch);
command.setResult(Result.REJECTED_OTHER_REASON,
"it doesn't exist or you do not have permission to delete it");
return command;
}
command =
new ReceiveCommand(ref.getObjectId(), ObjectId.zeroId(), ref.getName());
Branch.NameKey branchKey =
new Branch.NameKey(project.getNameKey(), ref.getName());
if (!project.getControl().controlForRef(branchKey).canDelete()) {
command.setResult(Result.REJECTED_OTHER_REASON,
"it doesn't exist or you do not have permission to delete it");
}
if (!queryProvider.get().setLimit(1).byBranchOpen(branchKey).isEmpty()) {
command.setResult(Result.REJECTED_OTHER_REASON, "it has open changes");
}
RefUpdate u = r.updateRef(branch);
u.setExpectedOldObjectId(r.exactRef(branch).getObjectId());
u.setNewObjectId(ObjectId.zeroId());
u.setForceUpdate(true);
refDeletionValidator.validateRefOperation(
project.getName(), identifiedUser.get(), u);
return command;
}
private void appendAndLogErrorMessage(StringBuilder errorMessages,
ReceiveCommand cmd) {
String msg = null;
switch (cmd.getResult()) {
case REJECTED_CURRENT_BRANCH:
msg = format("Cannot delete %s: it is the current branch",
cmd.getRefName());
break;
case REJECTED_OTHER_REASON:
msg = format("Cannot delete %s: %s", cmd.getRefName(), cmd.getMessage());
break;
case LOCK_FAILURE:
case NOT_ATTEMPTED:
case OK:
case REJECTED_MISSING_OBJECT:
case REJECTED_NOCREATE:
case REJECTED_NODELETE:
case REJECTED_NONFASTFORWARD:
default:
msg = format("Cannot delete %s: %s", cmd.getRefName(), cmd.getResult());
break;
}
log.error(msg);
errorMessages.append(msg);
errorMessages.append("\n");
}
private void postDeletion(ProjectResource project, ReceiveCommand cmd) {
referenceUpdated.fire(project.getNameKey(), cmd,
identifiedUser.get().getAccount());
}
}
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