| /* |
| * Copyright (C) 2012, Christian Halstrick <christian.halstrick@sap.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.internal.storage.file; |
| |
| import static org.hamcrest.MatcherAssert.assertThat; |
| 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 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(() -> { |
| RefUpdate update = new RefDirectoryUpdate( |
| (RefDirectory) repo.getRefDatabase(), |
| repo.exactRef("refs/tags/t")) { |
| @Override |
| public boolean isForceUpdate() { |
| try { |
| refUpdateLockedRef.await(); |
| packRefsDone.await(); |
| } catch (InterruptedException |
| | BrokenBarrierException e) { |
| Thread.currentThread().interrupt(); |
| } |
| return super.isForceUpdate(); |
| } |
| }; |
| update.setForceUpdate(true); |
| update.setNewObjectId(b); |
| return update.update(); |
| }); |
| |
| Future<Result> result2 = pool.submit(() -> { |
| refUpdateLockedRef.await(); |
| gc.packRefs(); |
| packRefsDone.await(); |
| return null; |
| }); |
| assertNull(result2.get()); |
| |
| 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()); |
| } |
| } |