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/*
* Copyright (C) 2008, 2020, 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.dircache;
import static java.nio.charset.StandardCharsets.UTF_8;
import static org.eclipse.jgit.junit.Assert.assertEquals;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import org.eclipse.jgit.dircache.DirCache.DirCacheVersion;
import org.eclipse.jgit.errors.CorruptObjectException;
import org.eclipse.jgit.junit.JGitTestUtil;
import org.eclipse.jgit.junit.LocalDiskRepositoryTestCase;
import org.eclipse.jgit.lib.FileMode;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.treewalk.TreeWalk;
import org.eclipse.jgit.util.FS;
import org.eclipse.jgit.util.IO;
import org.junit.Test;
public class DirCacheCGitCompatabilityTest extends LocalDiskRepositoryTestCase {
private final File index = pathOf("gitgit.index");
@Test
public void testReadIndex_LsFiles() throws Exception {
final Map<String, CGitIndexRecord> ls = readLsFiles();
final DirCache dc = new DirCache(index, FS.DETECTED);
assertEquals(0, dc.getEntryCount());
dc.read();
assertEquals(ls.size(), dc.getEntryCount());
{
final Iterator<CGitIndexRecord> rItr = ls.values().iterator();
for (int i = 0; rItr.hasNext(); i++)
assertEqual(rItr.next(), dc.getEntry(i));
}
}
@Test
public void testTreeWalk_LsFiles() throws Exception {
final Repository db = createBareRepository();
final Map<String, CGitIndexRecord> ls = readLsFiles();
final DirCache dc = new DirCache(index, db.getFS());
assertEquals(0, dc.getEntryCount());
dc.read();
assertEquals(ls.size(), dc.getEntryCount());
{
final Iterator<CGitIndexRecord> rItr = ls.values().iterator();
try (TreeWalk tw = new TreeWalk(db)) {
tw.setRecursive(true);
tw.addTree(new DirCacheIterator(dc));
while (rItr.hasNext()) {
final DirCacheIterator dcItr;
assertTrue(tw.next());
dcItr = tw.getTree(0, DirCacheIterator.class);
assertNotNull(dcItr);
assertEqual(rItr.next(), dcItr.getDirCacheEntry());
}
}
}
}
@Test
public void testUnsupportedOptionalExtension() throws Exception {
final DirCache dc = new DirCache(pathOf("gitgit.index.ZZZZ"),
FS.DETECTED);
dc.read();
assertEquals(1, dc.getEntryCount());
assertEquals("A", dc.getEntry(0).getPathString());
}
@Test
public void testUnsupportedRequiredExtension() throws Exception {
final DirCache dc = new DirCache(pathOf("gitgit.index.aaaa"),
FS.DETECTED);
try {
dc.read();
fail("Cache loaded an unsupported extension");
} catch (CorruptObjectException err) {
assertEquals("DIRC extension 'aaaa'"
+ " not supported by this version.", err.getMessage());
}
}
@Test
public void testCorruptChecksumAtFooter() throws Exception {
final DirCache dc = new DirCache(pathOf("gitgit.index.badchecksum"),
FS.DETECTED);
try {
dc.read();
fail("Cache loaded despite corrupt checksum");
} catch (CorruptObjectException err) {
assertEquals("DIRC checksum mismatch", err.getMessage());
}
}
private static void assertEqual(final CGitIndexRecord c,
final DirCacheEntry j) {
assertNotNull(c);
assertNotNull(j);
assertEquals(c.path, j.getPathString());
assertEquals(c.id, j.getObjectId());
assertEquals(c.mode, j.getRawMode());
assertEquals(c.stage, j.getStage());
}
@Test
public void testReadIndex_DirCacheTree() throws Exception {
final Map<String, CGitIndexRecord> cList = readLsFiles();
final Map<String, CGitLsTreeRecord> cTree = readLsTree();
final DirCache dc = new DirCache(index, FS.DETECTED);
assertEquals(0, dc.getEntryCount());
dc.read();
assertEquals(cList.size(), dc.getEntryCount());
final DirCacheTree jTree = dc.getCacheTree(false);
assertNotNull(jTree);
assertEquals("", jTree.getNameString());
assertEquals("", jTree.getPathString());
assertTrue(jTree.isValid());
assertEquals(ObjectId
.fromString("698dd0b8d0c299f080559a1cffc7fe029479a408"), jTree
.getObjectId());
assertEquals(cList.size(), jTree.getEntrySpan());
final ArrayList<CGitLsTreeRecord> subtrees = new ArrayList<>();
for (CGitLsTreeRecord r : cTree.values()) {
if (FileMode.TREE.equals(r.mode))
subtrees.add(r);
}
assertEquals(subtrees.size(), jTree.getChildCount());
for (int i = 0; i < jTree.getChildCount(); i++) {
final DirCacheTree sj = jTree.getChild(i);
final CGitLsTreeRecord sc = subtrees.get(i);
assertEquals(sc.path, sj.getNameString());
assertEquals(sc.path + "/", sj.getPathString());
assertTrue(sj.isValid());
assertEquals(sc.id, sj.getObjectId());
}
}
@Test
public void testReadWriteV3() throws Exception {
final File file = pathOf("gitgit.index.v3");
final DirCache dc = new DirCache(file, FS.DETECTED);
dc.read();
assertEquals(10, dc.getEntryCount());
assertV3TreeEntry(0, "dir1/file1.txt", false, false, dc);
assertV3TreeEntry(1, "dir2/file2.txt", true, false, dc);
assertV3TreeEntry(2, "dir3/file3.txt", false, false, dc);
assertV3TreeEntry(3, "dir3/file3a.txt", true, false, dc);
assertV3TreeEntry(4, "dir4/file4.txt", true, false, dc);
assertV3TreeEntry(5, "dir4/file4a.txt", false, false, dc);
assertV3TreeEntry(6, "file.txt", true, false, dc);
assertV3TreeEntry(7, "newdir1/newfile1.txt", false, true, dc);
assertV3TreeEntry(8, "newdir1/newfile2.txt", false, true, dc);
assertV3TreeEntry(9, "newfile.txt", false, true, dc);
final ByteArrayOutputStream bos = new ByteArrayOutputStream();
dc.writeTo(null, bos);
final byte[] indexBytes = bos.toByteArray();
final byte[] expectedBytes = IO.readFully(file);
assertArrayEquals(expectedBytes, indexBytes);
}
@Test
public void testReadWriteV4() throws Exception {
final File file = pathOf("gitgit.index.v4");
final DirCache dc = new DirCache(file, FS.DETECTED);
dc.read();
assertEquals(DirCacheVersion.DIRC_VERSION_PATHCOMPRESS,
dc.getVersion());
assertEquals(5, dc.getEntryCount());
assertV4TreeEntry(0, "src/org/eclipse/jgit/atest/foo.txt", false, dc);
assertV4TreeEntry(1, "src/org/eclipse/jgit/atest/foobar.txt", false,
dc);
assertV4TreeEntry(2, "src/org/eclipse/jgit/other/bar.txt", true, dc);
assertV4TreeEntry(3, "test.txt", false, dc);
assertV4TreeEntry(4, "test.txt2", false, dc);
final ByteArrayOutputStream bos = new ByteArrayOutputStream();
dc.writeTo(null, bos);
final byte[] indexBytes = bos.toByteArray();
final byte[] expectedBytes = IO.readFully(file);
assertArrayEquals(expectedBytes, indexBytes);
}
private static void assertV3TreeEntry(int indexPosition, String path,
boolean skipWorkTree, boolean intentToAdd, DirCache dc) {
final DirCacheEntry entry = dc.getEntry(indexPosition);
assertEquals(path, entry.getPathString());
assertEquals(skipWorkTree, entry.isSkipWorkTree());
assertEquals(intentToAdd, entry.isIntentToAdd());
}
private static void assertV4TreeEntry(int indexPosition, String path,
boolean skipWorkTree, DirCache dc) {
final DirCacheEntry entry = dc.getEntry(indexPosition);
assertEquals(path, entry.getPathString());
assertEquals(skipWorkTree, entry.isSkipWorkTree());
}
private static File pathOf(String name) {
return JGitTestUtil.getTestResourceFile(name);
}
private static Map<String, CGitIndexRecord> readLsFiles() throws Exception {
final LinkedHashMap<String, CGitIndexRecord> r = new LinkedHashMap<>();
try (BufferedReader br = new BufferedReader(new InputStreamReader(
new FileInputStream(pathOf("gitgit.lsfiles")), UTF_8))) {
String line;
while ((line = br.readLine()) != null) {
final CGitIndexRecord cr = new CGitIndexRecord(line);
r.put(cr.path, cr);
}
}
return r;
}
private static Map<String, CGitLsTreeRecord> readLsTree() throws Exception {
final LinkedHashMap<String, CGitLsTreeRecord> r = new LinkedHashMap<>();
try (BufferedReader br = new BufferedReader(new InputStreamReader(
new FileInputStream(pathOf("gitgit.lstree")), UTF_8))) {
String line;
while ((line = br.readLine()) != null) {
final CGitLsTreeRecord cr = new CGitLsTreeRecord(line);
r.put(cr.path, cr);
}
}
return r;
}
private static class CGitIndexRecord {
final int mode;
final ObjectId id;
final int stage;
final String path;
CGitIndexRecord(String line) {
final int tab = line.indexOf('\t');
final int sp1 = line.indexOf(' ');
final int sp2 = line.indexOf(' ', sp1 + 1);
mode = Integer.parseInt(line.substring(0, sp1), 8);
id = ObjectId.fromString(line.substring(sp1 + 1, sp2));
stage = Integer.parseInt(line.substring(sp2 + 1, tab));
path = line.substring(tab + 1);
}
}
private static class CGitLsTreeRecord {
final int mode;
final ObjectId id;
final String path;
CGitLsTreeRecord(String line) {
final int tab = line.indexOf('\t');
final int sp1 = line.indexOf(' ');
final int sp2 = line.indexOf(' ', sp1 + 1);
mode = Integer.parseInt(line.substring(0, sp1), 8);
id = ObjectId.fromString(line.substring(sp2 + 1, tab));
path = line.substring(tab + 1);
}
}
}
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