com.google.gerrit.server.project.GetHead Maven / Gradle / Ivy
// Copyright (C) 2013 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 com.google.gerrit.extensions.restapi.AuthException;
import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
import com.google.gerrit.extensions.restapi.RestReadView;
import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import java.io.IOException;
import org.eclipse.jgit.errors.IncorrectObjectTypeException;
import org.eclipse.jgit.errors.MissingObjectException;
import org.eclipse.jgit.errors.RepositoryNotFoundException;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
@Singleton
public class GetHead implements RestReadView {
private GitRepositoryManager repoManager;
private Provider db;
@Inject
GetHead(GitRepositoryManager repoManager, Provider db) {
this.repoManager = repoManager;
this.db = db;
}
@Override
public String apply(ProjectResource rsrc)
throws AuthException, ResourceNotFoundException, IOException {
try (Repository repo = repoManager.openRepository(rsrc.getNameKey())) {
Ref head = repo.getRefDatabase().exactRef(Constants.HEAD);
if (head == null) {
throw new ResourceNotFoundException(Constants.HEAD);
} else if (head.isSymbolic()) {
String n = head.getTarget().getName();
if (rsrc.getControl().controlForRef(n).isVisible()) {
return n;
}
throw new AuthException("not allowed to see HEAD");
} else if (head.getObjectId() != null) {
try (RevWalk rw = new RevWalk(repo)) {
RevCommit commit = rw.parseCommit(head.getObjectId());
if (rsrc.getControl().canReadCommit(db.get(), repo, commit)) {
return head.getObjectId().name();
}
throw new AuthException("not allowed to see HEAD");
} catch (MissingObjectException | IncorrectObjectTypeException e) {
if (rsrc.getControl().isOwner()) {
return head.getObjectId().name();
}
throw new AuthException("not allowed to see HEAD");
}
}
throw new ResourceNotFoundException(Constants.HEAD);
} catch (RepositoryNotFoundException e) {
throw new ResourceNotFoundException(rsrc.getName());
}
}
}