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- /*
- * Copyright (C) 2012, Christian Halstrick <christian.halstrick@sap.com>
- * and other copyright owners as documented in the project's IP log.
- *
- * This program and the accompanying materials are made available
- * under the terms of the Eclipse Distribution License v1.0 which
- * accompanies this distribution, is reproduced below, and is
- * available at http://www.eclipse.org/org/documents/edl-v10.php
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * - Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
- *
- * - Neither the name of the Eclipse Foundation, Inc. nor the
- * names of its contributors may be used to endorse or promote
- * products derived from this software without specific prior
- * written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
- package org.eclipse.jgit.internal.storage.file;
-
- import static org.hamcrest.Matchers.lessThanOrEqualTo;
- import static org.junit.Assert.assertEquals;
- import static org.junit.Assert.assertFalse;
- import static org.junit.Assert.assertNotNull;
- import static org.junit.Assert.assertNull;
- import static org.junit.Assert.assertSame;
- import static org.junit.Assert.assertThat;
-
- import java.io.File;
- import java.io.IOException;
- import java.nio.file.Files;
- import java.nio.file.Path;
- import java.util.concurrent.BrokenBarrierException;
- import java.util.concurrent.Callable;
- import java.util.concurrent.CyclicBarrier;
- import java.util.concurrent.ExecutorService;
- import java.util.concurrent.Executors;
- import java.util.concurrent.Future;
- import java.util.concurrent.TimeUnit;
-
- import org.eclipse.jgit.api.Git;
- import org.eclipse.jgit.junit.TestRepository.BranchBuilder;
- import org.eclipse.jgit.lib.ConfigConstants;
- import org.eclipse.jgit.lib.Constants;
- import org.eclipse.jgit.lib.Ref.Storage;
- import org.eclipse.jgit.lib.RefUpdate;
- import org.eclipse.jgit.lib.RefUpdate.Result;
- import org.eclipse.jgit.revwalk.RevBlob;
- import org.eclipse.jgit.revwalk.RevCommit;
- import org.eclipse.jgit.storage.file.FileBasedConfig;
- import org.junit.Test;
-
- @SuppressWarnings("boxing")
- public class GcPackRefsTest extends GcTestCase {
- @Test
- public void looseRefPacked() throws Exception {
- RevBlob a = tr.blob("a");
- tr.lightweightTag("t", a);
-
- gc.packRefs();
- assertSame(repo.exactRef("refs/tags/t").getStorage(), Storage.PACKED);
- }
-
- @Test
- public void emptyRefDirectoryDeleted() throws Exception {
- String ref = "dir/ref";
- tr.branch(ref).commit().create();
- String name = repo.findRef(ref).getName();
- Path dir = repo.getDirectory().toPath().resolve(name).getParent();
- assertNotNull(dir);
- gc.packRefs();
- assertFalse(Files.exists(dir));
- }
-
- @Test
- public void concurrentOnlyOneWritesPackedRefs() throws Exception {
- RevBlob a = tr.blob("a");
- tr.lightweightTag("t", a);
-
- CyclicBarrier syncPoint = new CyclicBarrier(2);
-
- // Returns 0 for success, 1 in case of error when writing pack.
- Callable<Integer> packRefs = () -> {
- syncPoint.await();
- try {
- gc.packRefs();
- return 0;
- } catch (IOException e) {
- return 1;
- }
- };
- ExecutorService pool = Executors.newFixedThreadPool(2);
- try {
- Future<Integer> p1 = pool.submit(packRefs);
- Future<Integer> p2 = pool.submit(packRefs);
- assertThat(p1.get() + p2.get(), lessThanOrEqualTo(1));
- } finally {
- pool.shutdown();
- pool.awaitTermination(Long.MAX_VALUE, TimeUnit.SECONDS);
- }
- }
-
- @Test
- public void whileRefLockedRefNotPackedNoError()
- throws Exception {
- RevBlob a = tr.blob("a");
- tr.lightweightTag("t1", a);
- tr.lightweightTag("t2", a);
- LockFile refLock = new LockFile(new File(repo.getDirectory(),
- "refs/tags/t1"));
- try {
- refLock.lock();
- gc.packRefs();
- } finally {
- refLock.unlock();
- }
-
- assertSame(repo.exactRef("refs/tags/t1").getStorage(), Storage.LOOSE);
- assertSame(repo.exactRef("refs/tags/t2").getStorage(), Storage.PACKED);
- }
-
- @Test
- public void whileRefUpdatedRefUpdateSucceeds()
- throws Exception {
- RevBlob a = tr.blob("a");
- tr.lightweightTag("t", a);
- final RevBlob b = tr.blob("b");
-
- final CyclicBarrier refUpdateLockedRef = new CyclicBarrier(2);
- final CyclicBarrier packRefsDone = new CyclicBarrier(2);
- ExecutorService pool = Executors.newFixedThreadPool(2);
- try {
- Future<Result> result = pool.submit(new Callable<Result>() {
-
- @Override
- public Result call() throws Exception {
- RefUpdate update = new RefDirectoryUpdate(
- (RefDirectory) repo.getRefDatabase(),
- repo.exactRef("refs/tags/t")) {
- @Override
- public boolean isForceUpdate() {
- try {
- refUpdateLockedRef.await();
- packRefsDone.await();
- } catch (InterruptedException e) {
- Thread.currentThread().interrupt();
- } catch (BrokenBarrierException e) {
- Thread.currentThread().interrupt();
- }
- return super.isForceUpdate();
- }
- };
- update.setForceUpdate(true);
- update.setNewObjectId(b);
- return update.update();
- }
- });
-
- pool.submit(new Callable<Void>() {
- @Override
- public Void call() throws Exception {
- refUpdateLockedRef.await();
- gc.packRefs();
- packRefsDone.await();
- return null;
- }
- });
-
- assertSame(result.get(), Result.FORCED);
-
- } finally {
- pool.shutdownNow();
- pool.awaitTermination(Long.MAX_VALUE, TimeUnit.SECONDS);
- }
-
- assertEquals(repo.exactRef("refs/tags/t").getObjectId(), b);
- }
-
- @Test
- public void dontPackHEAD_nonBare() throws Exception {
- BranchBuilder bb = tr.branch("refs/heads/side");
- RevCommit first = bb.commit().add("A", "A").add("B", "B").create();
- bb.commit().add("A", "A2").add("B", "B2").create();
- Git git = Git.wrap(repo);
-
- // check for the unborn branch master. HEAD should point to master and
- // master doesn't exist.
- assertEquals(repo.exactRef("HEAD").getTarget().getName(),
- "refs/heads/master");
- assertNull(repo.exactRef("HEAD").getTarget().getObjectId());
- gc.packRefs();
- assertSame(repo.exactRef("HEAD").getStorage(), Storage.LOOSE);
- assertEquals(repo.exactRef("HEAD").getTarget().getName(),
- "refs/heads/master");
- assertNull(repo.exactRef("HEAD").getTarget().getObjectId());
-
- git.checkout().setName("refs/heads/side").call();
- gc.packRefs();
- assertSame(repo.exactRef("HEAD").getStorage(), Storage.LOOSE);
-
- // check for detached HEAD
- git.checkout().setName(first.getName()).call();
- gc.packRefs();
- assertSame(repo.exactRef("HEAD").getStorage(), Storage.LOOSE);
- }
-
- @Test
- public void dontPackHEAD_bare() throws Exception {
- BranchBuilder bb = tr.branch("refs/heads/side");
- bb.commit().add("A", "A").add("B", "B").create();
- RevCommit second = bb.commit().add("A", "A2").add("B", "B2").create();
-
- // Convert the repo to be bare
- FileBasedConfig cfg = repo.getConfig();
- cfg.setBoolean(ConfigConstants.CONFIG_CORE_SECTION, null,
- ConfigConstants.CONFIG_KEY_BARE, true);
- cfg.save();
- Git git = Git.open(repo.getDirectory());
- repo = (FileRepository) git.getRepository();
-
- // check for the unborn branch master. HEAD should point to master and
- // master doesn't exist.
- assertEquals(repo.exactRef("HEAD").getTarget().getName(),
- "refs/heads/master");
- assertNull(repo.exactRef("HEAD").getTarget().getObjectId());
- gc.packRefs();
- assertSame(repo.exactRef("HEAD").getStorage(), Storage.LOOSE);
- assertEquals(repo.exactRef("HEAD").getTarget().getName(),
- "refs/heads/master");
- assertNull(repo.exactRef("HEAD").getTarget().getObjectId());
-
- // check for non-detached HEAD
- repo.updateRef(Constants.HEAD).link("refs/heads/side");
- gc.packRefs();
- assertSame(repo.exactRef("HEAD").getStorage(), Storage.LOOSE);
- assertEquals(repo.exactRef("HEAD").getTarget().getObjectId(),
- second.getId());
- }
- }
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