| // 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.api.projects.BranchInfo; |
| import com.google.gerrit.extensions.api.projects.BranchInput; |
| 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.RestModifyView; |
| import com.google.gerrit.reviewdb.client.Branch; |
| import com.google.gerrit.reviewdb.client.RefNames; |
| 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.permissions.PermissionBackend; |
| import com.google.gerrit.server.permissions.PermissionBackendException; |
| import com.google.gerrit.server.permissions.RefPermission; |
| import com.google.gerrit.server.util.MagicBranch; |
| import com.google.inject.Inject; |
| import com.google.inject.Provider; |
| import com.google.inject.assistedinject.Assisted; |
| import java.io.IOException; |
| import org.eclipse.jgit.errors.IncorrectObjectTypeException; |
| import org.eclipse.jgit.lib.Constants; |
| import org.eclipse.jgit.lib.ObjectId; |
| import org.eclipse.jgit.lib.RefUpdate; |
| import org.eclipse.jgit.lib.Repository; |
| import org.eclipse.jgit.revwalk.RevObject; |
| import org.eclipse.jgit.revwalk.RevWalk; |
| import org.eclipse.jgit.transport.ReceiveCommand; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class CreateBranch implements RestModifyView<ProjectResource, BranchInput> { |
| private static final Logger log = LoggerFactory.getLogger(CreateBranch.class); |
| |
| public interface Factory { |
| CreateBranch create(String ref); |
| } |
| |
| private final Provider<IdentifiedUser> identifiedUser; |
| private final PermissionBackend permissionBackend; |
| private final GitRepositoryManager repoManager; |
| private final GitReferenceUpdated referenceUpdated; |
| private final RefValidationHelper refCreationValidator; |
| private final CreateRefControl createRefControl; |
| private String ref; |
| |
| @Inject |
| CreateBranch( |
| Provider<IdentifiedUser> identifiedUser, |
| PermissionBackend permissionBackend, |
| GitRepositoryManager repoManager, |
| GitReferenceUpdated referenceUpdated, |
| RefValidationHelper.Factory refHelperFactory, |
| CreateRefControl createRefControl, |
| @Assisted String ref) { |
| this.identifiedUser = identifiedUser; |
| this.permissionBackend = permissionBackend; |
| this.repoManager = repoManager; |
| this.referenceUpdated = referenceUpdated; |
| this.refCreationValidator = refHelperFactory.create(ReceiveCommand.Type.CREATE); |
| this.createRefControl = createRefControl; |
| this.ref = ref; |
| } |
| |
| @Override |
| public BranchInfo apply(ProjectResource rsrc, BranchInput input) |
| throws BadRequestException, AuthException, ResourceConflictException, IOException, |
| PermissionBackendException, NoSuchProjectException { |
| if (input == null) { |
| input = new BranchInput(); |
| } |
| if (input.ref != null && !ref.equals(input.ref)) { |
| throw new BadRequestException("ref must match URL"); |
| } |
| if (input.revision == null) { |
| input.revision = Constants.HEAD; |
| } |
| while (ref.startsWith("/")) { |
| ref = ref.substring(1); |
| } |
| ref = RefNames.fullName(ref); |
| if (!Repository.isValidRefName(ref)) { |
| throw new BadRequestException("invalid branch name \"" + ref + "\""); |
| } |
| if (MagicBranch.isMagicBranch(ref)) { |
| throw new BadRequestException( |
| "not allowed to create branches under \"" |
| + MagicBranch.getMagicRefNamePrefix(ref) |
| + "\""); |
| } |
| |
| final Branch.NameKey name = new Branch.NameKey(rsrc.getNameKey(), ref); |
| try (Repository repo = repoManager.openRepository(rsrc.getNameKey())) { |
| ObjectId revid = RefUtil.parseBaseRevision(repo, rsrc.getNameKey(), input.revision); |
| RevWalk rw = RefUtil.verifyConnected(repo, revid); |
| RevObject object = rw.parseAny(revid); |
| |
| if (ref.startsWith(Constants.R_HEADS)) { |
| // Ensure that what we start the branch from is a commit. If we |
| // were given a tag, deference to the commit instead. |
| // |
| try { |
| object = rw.parseCommit(object); |
| } catch (IncorrectObjectTypeException notCommit) { |
| throw new BadRequestException("\"" + input.revision + "\" not a commit"); |
| } |
| } |
| |
| createRefControl.checkCreateRef(repo, name, object); |
| |
| try { |
| final RefUpdate u = repo.updateRef(ref); |
| u.setExpectedOldObjectId(ObjectId.zeroId()); |
| u.setNewObjectId(object.copy()); |
| u.setRefLogIdent(identifiedUser.get().newRefLogIdent()); |
| u.setRefLogMessage("created via REST from " + input.revision, false); |
| refCreationValidator.validateRefOperation(rsrc.getName(), identifiedUser.get(), u); |
| final RefUpdate.Result result = u.update(rw); |
| switch (result) { |
| case FAST_FORWARD: |
| case NEW: |
| case NO_CHANGE: |
| referenceUpdated.fire( |
| name.getParentKey(), |
| u, |
| ReceiveCommand.Type.CREATE, |
| identifiedUser.get().getAccount()); |
| break; |
| case LOCK_FAILURE: |
| if (repo.getRefDatabase().exactRef(ref) != null) { |
| throw new ResourceConflictException("branch \"" + ref + "\" already exists"); |
| } |
| String refPrefix = RefUtil.getRefPrefix(ref); |
| while (!Constants.R_HEADS.equals(refPrefix)) { |
| if (repo.getRefDatabase().exactRef(refPrefix) != null) { |
| throw new ResourceConflictException( |
| "Cannot create branch \"" |
| + ref |
| + "\" since it conflicts with branch \"" |
| + refPrefix |
| + "\"."); |
| } |
| refPrefix = RefUtil.getRefPrefix(refPrefix); |
| } |
| // $FALL-THROUGH$ |
| case FORCED: |
| case IO_FAILURE: |
| case NOT_ATTEMPTED: |
| case REJECTED: |
| case REJECTED_CURRENT_BRANCH: |
| case RENAMED: |
| case REJECTED_MISSING_OBJECT: |
| case REJECTED_OTHER_REASON: |
| default: |
| { |
| throw new IOException(result.name()); |
| } |
| } |
| |
| BranchInfo info = new BranchInfo(); |
| info.ref = ref; |
| info.revision = revid.getName(); |
| info.canDelete = |
| permissionBackend.user(identifiedUser).ref(name).testOrFalse(RefPermission.DELETE) |
| ? true |
| : null; |
| return info; |
| } catch (IOException err) { |
| log.error("Cannot create branch \"" + name + "\"", err); |
| throw err; |
| } |
| } catch (RefUtil.InvalidRevisionException e) { |
| throw new BadRequestException("invalid revision \"" + input.revision + "\""); |
| } |
| } |
| } |