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/*
* Copyright (C) 2022, Tencent.
*
* 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.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertFalse;
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.lib.ConfigConstants;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.StoredConfig;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.util.IO;
import org.junit.Test;
public class GcCommitGraphTest extends GcTestCase {
@Test
public void testCommitGraphConfig() {
StoredConfig config = repo.getConfig();
assertFalse(gc.shouldWriteCommitGraphWhenGc());
config.setBoolean(ConfigConstants.CONFIG_GC_SECTION, null,
ConfigConstants.CONFIG_KEY_WRITE_COMMIT_GRAPH, true);
assertTrue(gc.shouldWriteCommitGraphWhenGc());
config.setBoolean(ConfigConstants.CONFIG_GC_SECTION, null,
ConfigConstants.CONFIG_KEY_WRITE_COMMIT_GRAPH, false);
assertFalse(gc.shouldWriteCommitGraphWhenGc());
}
@Test
public void testWriteEmptyRepo() throws Exception {
StoredConfig config = repo.getConfig();
config.setBoolean(ConfigConstants.CONFIG_CORE_SECTION, null,
ConfigConstants.CONFIG_COMMIT_GRAPH, true);
config.setBoolean(ConfigConstants.CONFIG_GC_SECTION, null,
ConfigConstants.CONFIG_KEY_WRITE_COMMIT_GRAPH, true);
assertTrue(gc.shouldWriteCommitGraphWhenGc());
gc.writeCommitGraph(Collections.emptySet());
File graphFile = new File(repo.getObjectsDirectory(),
Constants.INFO_COMMIT_GRAPH);
assertFalse(graphFile.exists());
}
@Test
public void testWriteShallowRepo() throws Exception {
StoredConfig config = repo.getConfig();
config.setBoolean(ConfigConstants.CONFIG_CORE_SECTION, null,
ConfigConstants.CONFIG_COMMIT_GRAPH, true);
config.setBoolean(ConfigConstants.CONFIG_GC_SECTION, null,
ConfigConstants.CONFIG_KEY_WRITE_COMMIT_GRAPH, true);
RevCommit tip = commitChain(2);
TestRepository.BranchBuilder bb = tr.branch("refs/heads/master");
bb.update(tip);
repo.getObjectDatabase().setShallowCommits(Collections.singleton(tip));
gc.writeCommitGraph(Collections.singleton(tip));
File graphFile = new File(repo.getObjectsDirectory(),
Constants.INFO_COMMIT_GRAPH);
assertFalse(graphFile.exists());
}
@Test
public void testWriteWhenGc() throws Exception {
StoredConfig config = repo.getConfig();
config.setBoolean(ConfigConstants.CONFIG_CORE_SECTION, null,
ConfigConstants.CONFIG_COMMIT_GRAPH, true);
config.setBoolean(ConfigConstants.CONFIG_GC_SECTION, null,
ConfigConstants.CONFIG_KEY_WRITE_COMMIT_GRAPH, true);
RevCommit tip = commitChain(10);
TestRepository.BranchBuilder bb = tr.branch("refs/heads/master");
bb.update(tip);
assertTrue(gc.shouldWriteCommitGraphWhenGc());
gc.gc().get();
File graphFile = new File(repo.getObjectsDirectory(),
Constants.INFO_COMMIT_GRAPH);
assertGraphFile(graphFile);
}
@Test
public void testDefaultWriteWhenGc() throws Exception {
RevCommit tip = commitChain(10);
TestRepository.BranchBuilder bb = tr.branch("refs/heads/master");
bb.update(tip);
assertFalse(gc.shouldWriteCommitGraphWhenGc());
gc.gc().get();
File graphFile = new File(repo.getObjectsDirectory(),
Constants.INFO_COMMIT_GRAPH);
assertFalse(graphFile.exists());
}
@Test
public void testDisableWriteWhenGc() throws Exception {
RevCommit tip = commitChain(10);
TestRepository.BranchBuilder bb = tr.branch("refs/heads/master");
bb.update(tip);
File graphFile = new File(repo.getObjectsDirectory(),
Constants.INFO_COMMIT_GRAPH);
StoredConfig config = repo.getConfig();
config.setBoolean(ConfigConstants.CONFIG_CORE_SECTION, null,
ConfigConstants.CONFIG_COMMIT_GRAPH, false);
config.setBoolean(ConfigConstants.CONFIG_GC_SECTION, null,
ConfigConstants.CONFIG_KEY_WRITE_COMMIT_GRAPH, true);
gc.gc().get();
assertFalse(graphFile.exists());
config.setBoolean(ConfigConstants.CONFIG_CORE_SECTION, null,
ConfigConstants.CONFIG_COMMIT_GRAPH, true);
config.setBoolean(ConfigConstants.CONFIG_GC_SECTION, null,
ConfigConstants.CONFIG_KEY_WRITE_COMMIT_GRAPH, false);
gc.gc().get();
assertFalse(graphFile.exists());
config.setBoolean(ConfigConstants.CONFIG_CORE_SECTION, null,
ConfigConstants.CONFIG_COMMIT_GRAPH, false);
config.setBoolean(ConfigConstants.CONFIG_GC_SECTION, null,
ConfigConstants.CONFIG_KEY_WRITE_COMMIT_GRAPH, false);
gc.gc().get();
assertFalse(graphFile.exists());
}
@Test
public void testWriteCommitGraphOnly() throws Exception {
RevCommit tip = commitChain(10);
TestRepository.BranchBuilder bb = tr.branch("refs/heads/master");
bb.update(tip);
StoredConfig config = repo.getConfig();
config.setBoolean(ConfigConstants.CONFIG_CORE_SECTION, null,
ConfigConstants.CONFIG_COMMIT_GRAPH, false);
gc.writeCommitGraph(Collections.singleton(tip));
File graphFile = new File(repo.getObjectsDirectory(),
Constants.INFO_COMMIT_GRAPH);
assertFalse(graphFile.exists());
config.setBoolean(ConfigConstants.CONFIG_CORE_SECTION, null,
ConfigConstants.CONFIG_COMMIT_GRAPH, true);
gc.writeCommitGraph(Collections.singleton(tip));
assertGraphFile(graphFile);
}
private void assertGraphFile(File graphFile) throws Exception {
assertTrue(graphFile.exists());
try (InputStream os = new FileInputStream(graphFile)) {
byte[] magic = new byte[4];
IO.readFully(os, magic, 0, 4);
assertArrayEquals(new byte[] { 'C', 'G', 'P', 'H' }, magic);
}
}
}
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