| /* |
| * Copyright (C) 2015, 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.pgm.debug; |
| |
| import static org.eclipse.jgit.lib.Constants.HEAD; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.jgit.internal.storage.reftree.RefTree; |
| import org.eclipse.jgit.internal.storage.reftree.RefTreeDatabase; |
| import org.eclipse.jgit.lib.CommitBuilder; |
| import org.eclipse.jgit.lib.ConfigConstants; |
| 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.Ref; |
| import org.eclipse.jgit.lib.RefDatabase; |
| import org.eclipse.jgit.lib.RefUpdate; |
| import org.eclipse.jgit.lib.StoredConfig; |
| import org.eclipse.jgit.pgm.Command; |
| import org.eclipse.jgit.pgm.TextBuiltin; |
| import org.eclipse.jgit.revwalk.RevWalk; |
| import org.kohsuke.args4j.Option; |
| |
| @Command(usage = "usage_RebuildRefTree") |
| class RebuildRefTree extends TextBuiltin { |
| @Option(name = "--enable", usage = "usage_RebuildRefTreeEnable") |
| boolean enable; |
| |
| private String txnNamespace; |
| private String txnCommitted; |
| |
| /** {@inheritDoc} */ |
| @Override |
| protected void run() throws Exception { |
| try (ObjectReader reader = db.newObjectReader(); |
| RevWalk rw = new RevWalk(reader); |
| ObjectInserter inserter = db.newObjectInserter()) { |
| RefDatabase refDb = db.getRefDatabase(); |
| if (refDb instanceof RefTreeDatabase) { |
| RefTreeDatabase d = (RefTreeDatabase) refDb; |
| refDb = d.getBootstrap(); |
| txnNamespace = d.getTxnNamespace(); |
| txnCommitted = d.getTxnCommitted(); |
| } else { |
| RefTreeDatabase d = new RefTreeDatabase(db, refDb); |
| txnNamespace = d.getTxnNamespace(); |
| txnCommitted = d.getTxnCommitted(); |
| } |
| |
| errw.format("Rebuilding %s from %s", //$NON-NLS-1$ |
| txnCommitted, refDb.getClass().getSimpleName()); |
| errw.println(); |
| errw.flush(); |
| |
| CommitBuilder b = new CommitBuilder(); |
| Ref ref = refDb.exactRef(txnCommitted); |
| RefUpdate update = refDb.newUpdate(txnCommitted, true); |
| ObjectId oldTreeId; |
| |
| if (ref != null && ref.getObjectId() != null) { |
| ObjectId oldId = ref.getObjectId(); |
| update.setExpectedOldObjectId(oldId); |
| b.setParentId(oldId); |
| oldTreeId = rw.parseCommit(oldId).getTree(); |
| } else { |
| update.setExpectedOldObjectId(ObjectId.zeroId()); |
| oldTreeId = ObjectId.zeroId(); |
| } |
| |
| RefTree tree = rebuild(refDb); |
| b.setTreeId(tree.writeTree(inserter)); |
| b.setAuthor(new PersonIdent(db)); |
| b.setCommitter(b.getAuthor()); |
| if (b.getTreeId().equals(oldTreeId)) { |
| return; |
| } |
| |
| update.setNewObjectId(inserter.insert(b)); |
| inserter.flush(); |
| |
| RefUpdate.Result result = update.update(rw); |
| switch (result) { |
| case NEW: |
| case FAST_FORWARD: |
| break; |
| default: |
| throw die(String.format("%s: %s", update.getName(), result)); //$NON-NLS-1$ |
| } |
| |
| if (enable && !(db.getRefDatabase() instanceof RefTreeDatabase)) { |
| StoredConfig cfg = db.getConfig(); |
| cfg.setInt(ConfigConstants.CONFIG_CORE_SECTION, null, |
| ConfigConstants.CONFIG_KEY_REPO_FORMAT_VERSION, 1); |
| cfg.setString(ConfigConstants.CONFIG_EXTENSIONS_SECTION, null, |
| ConfigConstants.CONFIG_KEY_REFSTORAGE, |
| ConfigConstants.CONFIG_REFSTORAGE_REFTREE); |
| cfg.save(); |
| errw.println("Enabled reftree."); //$NON-NLS-1$ |
| errw.flush(); |
| } |
| } |
| } |
| |
| private RefTree rebuild(RefDatabase refdb) throws IOException { |
| RefTree tree = RefTree.newEmptyTree(); |
| List<org.eclipse.jgit.internal.storage.reftree.Command> cmds |
| = new ArrayList<>(); |
| |
| Ref head = refdb.exactRef(HEAD); |
| if (head != null) { |
| cmds.add(new org.eclipse.jgit.internal.storage.reftree.Command( |
| null, |
| head)); |
| } |
| |
| for (Ref r : refdb.getRefs()) { |
| if (r.getName().equals(txnCommitted) || r.getName().equals(HEAD) |
| || r.getName().startsWith(txnNamespace)) { |
| continue; |
| } |
| cmds.add(new org.eclipse.jgit.internal.storage.reftree.Command( |
| null, |
| db.getRefDatabase().peel(r))); |
| } |
| tree.apply(cmds); |
| return tree; |
| } |
| } |