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/*
* Copyright (C) 2008-2009, Google Inc.
* Copyright (C) 2008, Mike Ralphson <mike@abacus.co.uk>
* Copyright (C) 2008, Robin Rosenberg <robin.rosenberg@dewire.com> 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.transport;
import static java.nio.charset.StandardCharsets.UTF_8;
import static org.eclipse.jgit.lib.Constants.OBJ_BLOB;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertThrows;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.URISyntaxException;
import java.util.Collections;
import java.util.Set;
import org.eclipse.jgit.errors.MissingBundlePrerequisiteException;
import org.eclipse.jgit.errors.MissingObjectException;
import org.eclipse.jgit.errors.NotSupportedException;
import org.eclipse.jgit.errors.TransportException;
import org.eclipse.jgit.internal.storage.dfs.DfsRepositoryDescription;
import org.eclipse.jgit.internal.storage.dfs.InMemoryRepository;
import org.eclipse.jgit.lib.Constants;
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.Ref;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.test.resources.SampleDataRepositoryTestCase;
import org.junit.Test;
public class BundleWriterTest extends SampleDataRepositoryTestCase {
@Test
public void testEmptyBundleFails() throws Exception {
Repository newRepo = createBareRepository();
assertThrows(TransportException.class,
() -> fetchFromBundle(newRepo, new byte[0]));
}
@Test
public void testNonBundleFails() throws Exception {
Repository newRepo = createBareRepository();
assertThrows(TransportException.class, () -> fetchFromBundle(newRepo,
"Not a bundle file".getBytes(UTF_8)));
}
@Test
public void testGarbageBundleFails() throws Exception {
Repository newRepo = createBareRepository();
assertThrows(TransportException.class, () -> fetchFromBundle(newRepo,
(TransportBundle.V2_BUNDLE_SIGNATURE + '\n' + "Garbage")
.getBytes(UTF_8)));
}
@Test
public void testWriteSingleRef() throws Exception {
// Create a tiny bundle, (well one of) the first commits only
final byte[] bundle = makeBundle("refs/heads/firstcommit",
"42e4e7c5e507e113ebbb7801b16b52cf867b7ce1", null);
// Then we clone a new repo from that bundle and do a simple test. This
// makes sure we could read the bundle we created.
Repository newRepo = createBareRepository();
FetchResult fetchResult = fetchFromBundle(newRepo, bundle);
Ref advertisedRef = fetchResult
.getAdvertisedRef("refs/heads/firstcommit");
// We expect first commit to appear by id
assertEquals("42e4e7c5e507e113ebbb7801b16b52cf867b7ce1", advertisedRef
.getObjectId().name());
// ..and by name as the bundle created a new ref
assertEquals("42e4e7c5e507e113ebbb7801b16b52cf867b7ce1", newRepo
.resolve("refs/heads/firstcommit").name());
}
@Test
public void testWriteHEAD() throws Exception {
byte[] bundle = makeBundle("HEAD",
"42e4e7c5e507e113ebbb7801b16b52cf867b7ce1", null);
Repository newRepo = createBareRepository();
FetchResult fetchResult = fetchFromBundle(newRepo, bundle);
Ref advertisedRef = fetchResult.getAdvertisedRef("HEAD");
assertEquals("42e4e7c5e507e113ebbb7801b16b52cf867b7ce1", advertisedRef
.getObjectId().name());
}
@Test
public void testIncrementalBundle() throws Exception {
byte[] bundle;
// Create a small bundle, an early commit
bundle = makeBundle("refs/heads/aa", db.resolve("a").name(), null);
// Then we clone a new repo from that bundle and do a simple test. This
// makes sure
// we could read the bundle we created.
Repository newRepo = createBareRepository();
FetchResult fetchResult = fetchFromBundle(newRepo, bundle);
Ref advertisedRef = fetchResult.getAdvertisedRef("refs/heads/aa");
assertEquals(db.resolve("a").name(), advertisedRef.getObjectId().name());
assertEquals(db.resolve("a").name(), newRepo.resolve("refs/heads/aa")
.name());
assertNull(newRepo.resolve("refs/heads/a"));
// Next an incremental bundle
try (RevWalk rw = new RevWalk(db)) {
bundle = makeBundle("refs/heads/cc", db.resolve("c").name(),
rw.parseCommit(db.resolve("a").toObjectId()));
fetchResult = fetchFromBundle(newRepo, bundle);
advertisedRef = fetchResult.getAdvertisedRef("refs/heads/cc");
assertEquals(db.resolve("c").name(), advertisedRef.getObjectId().name());
assertEquals(db.resolve("c").name(), newRepo.resolve("refs/heads/cc")
.name());
assertNull(newRepo.resolve("refs/heads/c"));
assertNull(newRepo.resolve("refs/heads/a")); // still unknown
try {
// Check that we actually needed the first bundle
Repository newRepo2 = createBareRepository();
fetchResult = fetchFromBundle(newRepo2, bundle);
fail("We should not be able to fetch from bundle with prerequisites that are not fulfilled");
} catch (MissingBundlePrerequisiteException e) {
assertTrue(e.getMessage()
.indexOf(db.resolve("refs/heads/a").name()) >= 0);
}
}
}
@Test
public void testAbortWrite() throws Exception {
boolean caught = false;
try {
makeBundleWithCallback(
"refs/heads/aa", db.resolve("a").name(), null, false);
} catch (WriteAbortedException e) {
caught = true;
}
assertTrue(caught);
}
@Test
public void testCustomObjectReader() throws Exception {
String refName = "refs/heads/blob";
String data = "unflushed data";
ObjectId id;
ByteArrayOutputStream out = new ByteArrayOutputStream();
try (Repository repo = new InMemoryRepository(
new DfsRepositoryDescription("repo"));
ObjectInserter ins = repo.newObjectInserter();
ObjectReader or = ins.newReader()) {
id = ins.insert(OBJ_BLOB, Constants.encode(data));
BundleWriter bw = new BundleWriter(or);
bw.include(refName, id);
bw.writeBundle(NullProgressMonitor.INSTANCE, out);
assertNull(repo.exactRef(refName));
try {
repo.open(id, OBJ_BLOB);
fail("We should not be able to open the unflushed blob");
} catch (MissingObjectException e) {
// Expected.
}
}
try (Repository repo = new InMemoryRepository(
new DfsRepositoryDescription("copy"))) {
fetchFromBundle(repo, out.toByteArray());
Ref ref = repo.exactRef(refName);
assertNotNull(ref);
assertEquals(id, ref.getObjectId());
assertEquals(data,
new String(repo.open(id, OBJ_BLOB).getBytes(), UTF_8));
}
}
private static FetchResult fetchFromBundle(final Repository newRepo,
final byte[] bundle) throws URISyntaxException,
NotSupportedException, TransportException {
final URIish uri = new URIish("in-memory://");
final ByteArrayInputStream in = new ByteArrayInputStream(bundle);
final RefSpec rs = new RefSpec("refs/heads/*:refs/heads/*");
final Set<RefSpec> refs = Collections.singleton(rs);
try (TransportBundleStream transport = new TransportBundleStream(
newRepo, uri, in)) {
return transport.fetch(NullProgressMonitor.INSTANCE, refs);
}
}
private byte[] makeBundle(final String name,
final String anObjectToInclude, final RevCommit assume)
throws FileNotFoundException, IOException {
return makeBundleWithCallback(name, anObjectToInclude, assume, true);
}
private byte[] makeBundleWithCallback(final String name,
final String anObjectToInclude, final RevCommit assume,
boolean value)
throws FileNotFoundException, IOException {
final BundleWriter bw;
bw = new BundleWriter(db);
bw.setObjectCountCallback(new NaiveObjectCountCallback(value));
bw.include(name, ObjectId.fromString(anObjectToInclude));
if (assume != null)
bw.assume(assume);
final ByteArrayOutputStream out = new ByteArrayOutputStream();
bw.writeBundle(NullProgressMonitor.INSTANCE, out);
return out.toByteArray();
}
private static class NaiveObjectCountCallback
implements ObjectCountCallback {
private final boolean value;
NaiveObjectCountCallback(boolean value) {
this.value = value;
}
@Override
public void setObjectCount(long unused) throws WriteAbortedException {
if (!value)
throw new WriteAbortedException();
}
}
}
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