| /* |
| * Copyright (C) 2016, Google Inc. and others |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Distribution License v. 1.0 which is available at |
| * https://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| package org.eclipse.jgit.internal.storage.reftree; |
| |
| import static org.eclipse.jgit.lib.Constants.OBJ_TREE; |
| import static org.eclipse.jgit.transport.ReceiveCommand.Result.NOT_ATTEMPTED; |
| import static org.eclipse.jgit.transport.ReceiveCommand.Result.OK; |
| import static org.eclipse.jgit.transport.ReceiveCommand.Result.REJECTED_NONFASTFORWARD; |
| import static org.eclipse.jgit.transport.ReceiveCommand.Result.REJECTED_OTHER_REASON; |
| import static org.eclipse.jgit.transport.ReceiveCommand.Type.UPDATE; |
| import static org.eclipse.jgit.transport.ReceiveCommand.Type.UPDATE_NONFASTFORWARD; |
| |
| import java.io.IOException; |
| import java.text.MessageFormat; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.jgit.annotations.Nullable; |
| import org.eclipse.jgit.internal.JGitText; |
| import org.eclipse.jgit.lib.BatchRefUpdate; |
| import org.eclipse.jgit.lib.CommitBuilder; |
| import org.eclipse.jgit.lib.NullProgressMonitor; |
| import org.eclipse.jgit.lib.ObjectId; |
| import org.eclipse.jgit.lib.ObjectInserter; |
| import org.eclipse.jgit.lib.ObjectReader; |
| import org.eclipse.jgit.lib.PersonIdent; |
| import org.eclipse.jgit.lib.ProgressMonitor; |
| 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 org.eclipse.jgit.transport.ReceiveCommand; |
| |
| /** Batch update a {@link RefTreeDatabase}. */ |
| class RefTreeBatch extends BatchRefUpdate { |
| private final RefTreeDatabase refdb; |
| private Ref src; |
| private ObjectId parentCommitId; |
| private ObjectId parentTreeId; |
| private RefTree tree; |
| private PersonIdent author; |
| private ObjectId newCommitId; |
| |
| RefTreeBatch(RefTreeDatabase refdb) { |
| super(refdb); |
| this.refdb = refdb; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public void execute(RevWalk rw, ProgressMonitor monitor) |
| throws IOException { |
| List<Command> todo = new ArrayList<>(getCommands().size()); |
| for (ReceiveCommand c : getCommands()) { |
| if (!isAllowNonFastForwards()) { |
| if (c.getType() == UPDATE) { |
| c.updateType(rw); |
| } |
| if (c.getType() == UPDATE_NONFASTFORWARD) { |
| c.setResult(REJECTED_NONFASTFORWARD); |
| if (isAtomic()) { |
| ReceiveCommand.abort(getCommands()); |
| return; |
| } |
| continue; |
| } |
| } |
| todo.add(new Command(rw, c)); |
| } |
| init(rw); |
| execute(rw, todo); |
| } |
| |
| void init(RevWalk rw) throws IOException { |
| src = refdb.getBootstrap().exactRef(refdb.getTxnCommitted()); |
| if (src != null && src.getObjectId() != null) { |
| RevCommit c = rw.parseCommit(src.getObjectId()); |
| parentCommitId = c; |
| parentTreeId = c.getTree(); |
| tree = RefTree.read(rw.getObjectReader(), c.getTree()); |
| } else { |
| parentCommitId = ObjectId.zeroId(); |
| parentTreeId = new ObjectInserter.Formatter() |
| .idFor(OBJ_TREE, new byte[] {}); |
| tree = RefTree.newEmptyTree(); |
| } |
| } |
| |
| @Nullable |
| Ref exactRef(ObjectReader reader, String name) throws IOException { |
| return tree.exactRef(reader, name); |
| } |
| |
| /** |
| * Execute an update from {@link RefTreeUpdate} or {@link RefTreeRename}. |
| * |
| * @param rw |
| * current RevWalk handling the update or rename. |
| * @param todo |
| * commands to execute. Must never be a bootstrap reference name. |
| * @throws IOException |
| * the storage system is unable to read or write data. |
| */ |
| void execute(RevWalk rw, List<Command> todo) throws IOException { |
| for (Command c : todo) { |
| if (c.getResult() != NOT_ATTEMPTED) { |
| Command.abort(todo, null); |
| return; |
| } |
| if (refdb.conflictsWithBootstrap(c.getRefName())) { |
| c.setResult(REJECTED_OTHER_REASON, MessageFormat |
| .format(JGitText.get().invalidRefName, c.getRefName())); |
| Command.abort(todo, null); |
| return; |
| } |
| } |
| |
| if (apply(todo) && newCommitId != null) { |
| commit(rw, todo); |
| } |
| } |
| |
| private boolean apply(List<Command> todo) throws IOException { |
| if (!tree.apply(todo)) { |
| // apply set rejection information on commands. |
| return false; |
| } |
| |
| Repository repo = refdb.getRepository(); |
| try (ObjectInserter ins = repo.newObjectInserter()) { |
| CommitBuilder b = new CommitBuilder(); |
| b.setTreeId(tree.writeTree(ins)); |
| if (parentTreeId.equals(b.getTreeId())) { |
| for (Command c : todo) { |
| c.setResult(OK); |
| } |
| return true; |
| } |
| if (!parentCommitId.equals(ObjectId.zeroId())) { |
| b.setParentId(parentCommitId); |
| } |
| |
| author = getRefLogIdent(); |
| if (author == null) { |
| author = new PersonIdent(repo); |
| } |
| b.setAuthor(author); |
| b.setCommitter(author); |
| b.setMessage(getRefLogMessage()); |
| newCommitId = ins.insert(b); |
| ins.flush(); |
| } |
| return true; |
| } |
| |
| private void commit(RevWalk rw, List<Command> todo) throws IOException { |
| ReceiveCommand commit = new ReceiveCommand( |
| parentCommitId, newCommitId, |
| refdb.getTxnCommitted()); |
| updateBootstrap(rw, commit); |
| |
| if (commit.getResult() == OK) { |
| for (Command c : todo) { |
| c.setResult(OK); |
| } |
| } else { |
| Command.abort(todo, commit.getResult().name()); |
| } |
| } |
| |
| private void updateBootstrap(RevWalk rw, ReceiveCommand commit) |
| throws IOException { |
| BatchRefUpdate u = refdb.getBootstrap().newBatchUpdate(); |
| u.setAllowNonFastForwards(true); |
| u.setPushCertificate(getPushCertificate()); |
| if (isRefLogDisabled()) { |
| u.disableRefLog(); |
| } else { |
| u.setRefLogIdent(author); |
| u.setRefLogMessage(getRefLogMessage(), false); |
| } |
| u.addCommand(commit); |
| u.execute(rw, NullProgressMonitor.INSTANCE); |
| } |
| } |