| // 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 static org.eclipse.jgit.lib.RefDatabase.ALL; |
| |
| import com.google.gerrit.common.ChangeHooks; |
| import com.google.gerrit.common.errors.InvalidRevisionException; |
| import com.google.gerrit.extensions.restapi.AuthException; |
| import com.google.gerrit.extensions.restapi.BadRequestException; |
| import com.google.gerrit.extensions.restapi.DefaultInput; |
| 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.Project; |
| 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.project.CreateBranch.Input; |
| import com.google.gerrit.server.project.ListBranches.BranchInfo; |
| import com.google.gerrit.server.util.MagicBranch; |
| import com.google.inject.Inject; |
| import com.google.inject.assistedinject.Assisted; |
| |
| import org.eclipse.jgit.errors.IncorrectObjectTypeException; |
| import org.eclipse.jgit.errors.MissingObjectException; |
| import org.eclipse.jgit.errors.RevisionSyntaxException; |
| import org.eclipse.jgit.lib.Constants; |
| 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.ObjectWalk; |
| import org.eclipse.jgit.revwalk.RevObject; |
| import org.eclipse.jgit.revwalk.RevWalk; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| |
| public class CreateBranch implements RestModifyView<ProjectResource, Input> { |
| private static final Logger log = LoggerFactory.getLogger(CreateBranch.class); |
| |
| static class Input { |
| String ref; |
| |
| @DefaultInput |
| String revision; |
| } |
| |
| static interface Factory { |
| CreateBranch create(String ref); |
| } |
| |
| private final IdentifiedUser identifiedUser; |
| private final GitRepositoryManager repoManager; |
| private final GitReferenceUpdated referenceUpdated; |
| private final ChangeHooks hooks; |
| private String ref; |
| |
| @Inject |
| CreateBranch(IdentifiedUser identifiedUser, GitRepositoryManager repoManager, |
| GitReferenceUpdated referenceUpdated, ChangeHooks hooks, |
| @Assisted String ref) { |
| this.identifiedUser = identifiedUser; |
| this.repoManager = repoManager; |
| this.referenceUpdated = referenceUpdated; |
| this.hooks = hooks; |
| this.ref = ref; |
| } |
| |
| @Override |
| public BranchInfo apply(ProjectResource rsrc, Input input) |
| throws BadRequestException, AuthException, ResourceConflictException, |
| IOException { |
| if (input == null) { |
| input = new Input(); |
| } |
| 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); |
| } |
| if (!ref.startsWith(Constants.R_REFS)) { |
| ref = Constants.R_HEADS + 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); |
| final RefControl refControl = rsrc.getControl().controlForRef(name); |
| final Repository repo = repoManager.openRepository(rsrc.getNameKey()); |
| try { |
| final ObjectId revid = parseBaseRevision(repo, rsrc.getNameKey(), input.revision); |
| final RevWalk rw = 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"); |
| } |
| } |
| |
| if (!refControl.canCreate(rw, object)) { |
| throw new AuthException("Cannot create \"" + ref + "\""); |
| } |
| |
| try { |
| final RefUpdate u = repo.updateRef(ref); |
| u.setExpectedOldObjectId(ObjectId.zeroId()); |
| u.setNewObjectId(object.copy()); |
| u.setRefLogIdent(identifiedUser.newRefLogIdent()); |
| u.setRefLogMessage("created via REST from " + input.revision, false); |
| final RefUpdate.Result result = u.update(rw); |
| switch (result) { |
| case FAST_FORWARD: |
| case NEW: |
| case NO_CHANGE: |
| referenceUpdated.fire(name.getParentKey(), u); |
| hooks.doRefUpdatedHook(name, u, identifiedUser.getAccount()); |
| break; |
| case LOCK_FAILURE: |
| if (repo.getRef(ref) != null) { |
| throw new ResourceConflictException("branch \"" + ref |
| + "\" already exists"); |
| } |
| String refPrefix = getRefPrefix(ref); |
| while (!Constants.R_HEADS.equals(refPrefix)) { |
| if (repo.getRef(refPrefix) != null) { |
| throw new ResourceConflictException("Cannot create branch \"" |
| + ref + "\" since it conflicts with branch \"" + refPrefix |
| + "\"."); |
| } |
| refPrefix = getRefPrefix(refPrefix); |
| } |
| default: { |
| throw new IOException(result.name()); |
| } |
| } |
| |
| BranchInfo b = new BranchInfo(); |
| b.ref = ref; |
| b.revision = revid.getName(); |
| b.setCanDelete(refControl.canDelete()); |
| return b; |
| } catch (IOException err) { |
| log.error("Cannot create branch \"" + name + "\"", err); |
| throw err; |
| } |
| } catch (InvalidRevisionException e) { |
| throw new BadRequestException("invalid revision \"" + input.revision + "\""); |
| } finally { |
| repo.close(); |
| } |
| } |
| |
| private static String getRefPrefix(final String refName) { |
| final int i = refName.lastIndexOf('/'); |
| if (i > Constants.R_HEADS.length() - 1) { |
| return refName.substring(0, i); |
| } |
| return Constants.R_HEADS; |
| } |
| |
| private ObjectId parseBaseRevision(Repository repo, |
| Project.NameKey projectName, String baseRevision) |
| throws InvalidRevisionException { |
| try { |
| final ObjectId revid = repo.resolve(baseRevision); |
| if (revid == null) { |
| throw new InvalidRevisionException(); |
| } |
| return revid; |
| } catch (IOException err) { |
| log.error("Cannot resolve \"" + baseRevision + "\" in project \"" |
| + projectName.get() + "\"", err); |
| throw new InvalidRevisionException(); |
| } catch (RevisionSyntaxException err) { |
| log.error("Invalid revision syntax \"" + baseRevision + "\"", err); |
| throw new InvalidRevisionException(); |
| } |
| } |
| |
| private RevWalk verifyConnected(final Repository repo, final ObjectId revid) |
| throws InvalidRevisionException { |
| try { |
| final ObjectWalk rw = new ObjectWalk(repo); |
| try { |
| rw.markStart(rw.parseCommit(revid)); |
| } catch (IncorrectObjectTypeException err) { |
| throw new InvalidRevisionException(); |
| } |
| for (final Ref r : repo.getRefDatabase().getRefs(ALL).values()) { |
| try { |
| rw.markUninteresting(rw.parseAny(r.getObjectId())); |
| } catch (MissingObjectException err) { |
| continue; |
| } |
| } |
| rw.checkConnectivity(); |
| return rw; |
| } catch (IncorrectObjectTypeException err) { |
| throw new InvalidRevisionException(); |
| } catch (MissingObjectException err) { |
| throw new InvalidRevisionException(); |
| } catch (IOException err) { |
| log.error("Repository \"" + repo.getDirectory() |
| + "\" may be corrupt; suggest running git fsck", err); |
| throw new InvalidRevisionException(); |
| } |
| } |
| } |