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/*
* Copyright (C) 2023, Google LLC 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.file;
import static org.eclipse.jgit.internal.storage.pack.PackExt.REVERSE_INDEX;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Collections;
import org.eclipse.jgit.junit.TestRepository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.storage.pack.PackConfig;
import org.eclipse.jgit.util.IO;
import org.junit.Test;
public class GcReverseIndexTest extends GcTestCase {
@Test
public void testWriteDefault() throws Exception {
PackConfig config = new PackConfig(repo);
gc.setPackConfig(config);
RevCommit tip = commitChain(10);
TestRepository.BranchBuilder bb = tr.branch("refs/heads/main");
bb.update(tip);
gc.gc().get();
assertRidxDoesNotExist(repo);
}
@Test
public void testWriteDisabled() throws Exception {
PackConfig config = new PackConfig(repo);
config.setWriteReverseIndex(false);
gc.setPackConfig(config);
RevCommit tip = commitChain(10);
TestRepository.BranchBuilder bb = tr.branch("refs/heads/main");
bb.update(tip);
gc.gc().get();
assertRidxDoesNotExist(repo);
}
@Test
public void testWriteEmptyRepo() throws Exception {
PackConfig config = new PackConfig(repo);
config.setWriteReverseIndex(true);
gc.setPackConfig(config);
gc.gc().get();
assertRidxDoesNotExist(repo);
}
@Test
public void testWriteShallowRepo() throws Exception {
PackConfig config = new PackConfig(repo);
config.setWriteReverseIndex(true);
gc.setPackConfig(config);
RevCommit tip = commitChain(2);
TestRepository.BranchBuilder bb = tr.branch("refs/heads/main");
bb.update(tip);
repo.getObjectDatabase().setShallowCommits(Collections.singleton(tip));
gc.gc().get();
assertValidRidxExists(repo);
}
@Test
public void testWriteEnabled() throws Exception {
PackConfig config = new PackConfig(repo);
config.setWriteReverseIndex(true);
gc.setPackConfig(config);
RevCommit tip = commitChain(10);
TestRepository.BranchBuilder bb = tr.branch("refs/heads/main");
bb.update(tip);
gc.gc().get();
assertValidRidxExists(repo);
}
private static void assertValidRidxExists(FileRepository repo)
throws Exception {
PackFile packFile = repo.getObjectDatabase().getPacks().iterator()
.next().getPackFile();
File file = packFile.create(REVERSE_INDEX);
assertTrue(file.exists());
try (InputStream os = new FileInputStream(file)) {
byte[] magic = new byte[4];
IO.readFully(os, magic, 0, 4);
assertArrayEquals(new byte[] { 'R', 'I', 'D', 'X' }, magic);
}
}
private static void assertRidxDoesNotExist(FileRepository repo) {
File packDir = repo.getObjectDatabase().getPackDirectory();
String[] reverseIndexFilenames = packDir.list(
(dir, name) -> name.endsWith(REVERSE_INDEX.getExtension()));
assertEquals(0, reverseIndexFilenames.length);
}
}
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