| // 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 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; |
| |
| import java.io.IOException; |
| |
| @Singleton |
| public class GetHead implements RestReadView<ProjectResource> { |
| private GitRepositoryManager repoManager; |
| private Provider<ReviewDb> db; |
| |
| @Inject |
| GetHead(GitRepositoryManager repoManager, |
| Provider<ReviewDb> 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.getRef(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(), rw, 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()); |
| } |
| } |
| } |