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// Copyright (C) 2017 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.server.git.validators;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.collect.ImmutableMap;
import com.google.gerrit.extensions.annotations.ExtensionPoint;
import com.google.gerrit.reviewdb.client.Project;
import com.google.gerrit.server.git.RefCache;
import com.google.gerrit.server.update.ChainedReceiveCommands;
import com.google.gerrit.server.validators.ValidationException;
import java.io.IOException;
import java.util.Optional;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.transport.ReceiveCommand;
/**
* Listener to validate ref updates performed during submit operation.
*
* <p>As submit strategies may generate new commits (e.g. Cherry Pick), this listener allows
* validation of resulting new commit before destination branch is updated and new patchset ref is
* created.
*
* <p>If you only care about validating the change being submitted and not the resulting new commit,
* consider using {@link MergeValidationListener} instead.
*/
@ExtensionPoint
public interface OnSubmitValidationListener {
class Arguments {
private Project.NameKey project;
private RevWalk rw;
private ImmutableMap<String, ReceiveCommand> commands;
private RefCache refs;
/**
* @param project project.
* @param rw revwalk that can read unflushed objects from {@code refs}.
* @param commands commands to be executed.
*/
Arguments(Project.NameKey project, RevWalk rw, ChainedReceiveCommands commands) {
this.project = checkNotNull(project);
this.rw = checkNotNull(rw);
this.refs = checkNotNull(commands);
this.commands = ImmutableMap.copyOf(commands.getCommands());
}
/** Get the project name for this operation. */
public Project.NameKey getProject() {
return project;
}
/**
* Get a revwalk for this operation.
*
* <p>This instance is able to read all objects mentioned in {@link #getCommands()} and {@link
* #getRef(String)}.
*
* @return open revwalk.
*/
public RevWalk getRevWalk() {
return rw;
}
/**
* @return a map from ref to commands covering all ref operations to be performed on this
* repository as part of the ongoing submit operation.
*/
public ImmutableMap<String, ReceiveCommand> getCommands() {
return commands;
}
/**
* Get a ref from the repository.
*
* @param name ref name; can be any ref, not just the ones mentioned in {@link #getCommands()}.
* @return latest value of a ref in the repository, as if all commands from {@link
* #getCommands()} had already been applied.
* @throws IOException if an error occurred reading the ref.
*/
public Optional<ObjectId> getRef(String name) throws IOException {
return refs.get(name);
}
}
/**
* Called right before branch is updated with new commit or commits as a result of submit.
*
* <p>If ValidationException is thrown, submitting is aborted.
*/
void preBranchUpdate(Arguments args) throws ValidationException;
}
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