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Instead of storing references in the local filesystem rely on the RefTree rooted at refs/txn/committed. This avoids needing to store references in the packed-refs file by keeping all data rooted under a single refs/txn/committed ref. Performance to scan all references from a well packed RefTree is very close to reading the packed-refs file from local disk. Storing a packed RefTree is smaller due to pack file compression, about 49.39 bytes/ref (on average) compared to packed-refs using ~65.49 bytes/ref. Change-Id: I75caa631162dc127a780095066195cbacc746d49stable-4.3
Shawn Pearce
9 years ago
10 changed files with 1937 additions and 4 deletions
@ -0,0 +1,685 @@ |
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/* |
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* Copyright (C) 2010, 2013, 2016 Google Inc. |
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* and other copyright owners as documented in the project's IP log. |
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* |
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* This program and the accompanying materials are made available |
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* under the terms of the Eclipse Distribution License v1.0 which |
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* accompanies this distribution, is reproduced below, and is |
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* available at http://www.eclipse.org/org/documents/edl-v10.php
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* |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or |
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* without modification, are permitted provided that the following |
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* conditions are met: |
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* |
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* - Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials provided |
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* with the distribution. |
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* |
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* - Neither the name of the Eclipse Foundation, Inc. nor the |
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* names of its contributors may be used to endorse or promote |
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* products derived from this software without specific prior |
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* written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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package org.eclipse.jgit.internal.storage.reftree; |
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import static org.eclipse.jgit.lib.Constants.HEAD; |
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import static org.eclipse.jgit.lib.Constants.R_HEADS; |
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import static org.eclipse.jgit.lib.Constants.R_TAGS; |
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import static org.eclipse.jgit.lib.Ref.Storage.LOOSE; |
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import static org.eclipse.jgit.lib.Ref.Storage.PACKED; |
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import static org.eclipse.jgit.lib.RefDatabase.ALL; |
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import static org.eclipse.jgit.transport.ReceiveCommand.Result.LOCK_FAILURE; |
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import static org.eclipse.jgit.transport.ReceiveCommand.Result.OK; |
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import static org.eclipse.jgit.transport.ReceiveCommand.Result.REJECTED_NONFASTFORWARD; |
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import static org.eclipse.jgit.transport.ReceiveCommand.Result.REJECTED_OTHER_REASON; |
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import static org.junit.Assert.assertEquals; |
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import static org.junit.Assert.assertFalse; |
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import static org.junit.Assert.assertNotEquals; |
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import static org.junit.Assert.assertNotNull; |
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import static org.junit.Assert.assertNull; |
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import static org.junit.Assert.assertSame; |
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import static org.junit.Assert.assertTrue; |
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import static org.junit.Assert.fail; |
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import java.io.IOException; |
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import java.text.MessageFormat; |
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import java.util.Arrays; |
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import java.util.Collections; |
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import java.util.List; |
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import java.util.Map; |
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import org.eclipse.jgit.internal.JGitText; |
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import org.eclipse.jgit.internal.storage.dfs.DfsRepositoryDescription; |
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import org.eclipse.jgit.internal.storage.dfs.InMemoryRepository; |
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import org.eclipse.jgit.junit.TestRepository; |
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import org.eclipse.jgit.lib.AnyObjectId; |
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import org.eclipse.jgit.lib.BatchRefUpdate; |
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import org.eclipse.jgit.lib.CommitBuilder; |
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import org.eclipse.jgit.lib.NullProgressMonitor; |
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import org.eclipse.jgit.lib.ObjectId; |
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import org.eclipse.jgit.lib.ObjectIdRef; |
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import org.eclipse.jgit.lib.ObjectInserter; |
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import org.eclipse.jgit.lib.ObjectReader; |
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import org.eclipse.jgit.lib.Ref; |
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import org.eclipse.jgit.lib.RefDatabase; |
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import org.eclipse.jgit.lib.RefUpdate; |
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import org.eclipse.jgit.lib.SymbolicRef; |
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import org.eclipse.jgit.revwalk.RevCommit; |
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import org.eclipse.jgit.revwalk.RevTag; |
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import org.eclipse.jgit.revwalk.RevWalk; |
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import org.eclipse.jgit.transport.ReceiveCommand; |
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import org.junit.Before; |
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import org.junit.Test; |
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public class RefTreeDatabaseTest { |
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private InMemRefTreeRepo repo; |
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private RefTreeDatabase refdb; |
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private RefDatabase bootstrap; |
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private TestRepository<InMemRefTreeRepo> testRepo; |
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private RevCommit A; |
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private RevCommit B; |
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private RevTag v1_0; |
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@Before |
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public void setUp() throws Exception { |
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repo = new InMemRefTreeRepo(new DfsRepositoryDescription("test")); |
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bootstrap = refdb.getBootstrap(); |
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testRepo = new TestRepository<>(repo); |
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A = testRepo.commit().create(); |
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B = testRepo.commit(testRepo.getRevWalk().parseCommit(A)); |
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v1_0 = testRepo.tag("v1_0", B); |
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testRepo.getRevWalk().parseBody(v1_0); |
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} |
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@Test |
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public void testSupportsAtomic() { |
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assertTrue(refdb.performsAtomicTransactions()); |
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} |
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@Test |
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public void testGetRefs_EmptyDatabase() throws IOException { |
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assertTrue("no references", refdb.getRefs(ALL).isEmpty()); |
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assertTrue("no references", refdb.getRefs(R_HEADS).isEmpty()); |
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assertTrue("no references", refdb.getRefs(R_TAGS).isEmpty()); |
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} |
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@Test |
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public void testGetRefs_HeadOnOneBranch() throws IOException { |
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symref(HEAD, "refs/heads/master"); |
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update("refs/heads/master", A); |
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Map<String, Ref> all = refdb.getRefs(ALL); |
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assertEquals(2, all.size()); |
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assertTrue("has HEAD", all.containsKey(HEAD)); |
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assertTrue("has master", all.containsKey("refs/heads/master")); |
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Ref head = all.get(HEAD); |
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Ref master = all.get("refs/heads/master"); |
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assertEquals(HEAD, head.getName()); |
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assertTrue(head.isSymbolic()); |
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assertSame(LOOSE, head.getStorage()); |
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assertSame("uses same ref as target", master, head.getTarget()); |
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assertEquals("refs/heads/master", master.getName()); |
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assertFalse(master.isSymbolic()); |
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assertSame(PACKED, master.getStorage()); |
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assertEquals(A, master.getObjectId()); |
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} |
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@Test |
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public void testGetRefs_DetachedHead() throws IOException { |
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update(HEAD, A); |
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Map<String, Ref> all = refdb.getRefs(ALL); |
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assertEquals(1, all.size()); |
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assertTrue("has HEAD", all.containsKey(HEAD)); |
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Ref head = all.get(HEAD); |
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assertEquals(HEAD, head.getName()); |
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assertFalse(head.isSymbolic()); |
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assertSame(PACKED, head.getStorage()); |
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assertEquals(A, head.getObjectId()); |
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} |
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@Test |
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public void testGetRefs_DeeplyNestedBranch() throws IOException { |
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String name = "refs/heads/a/b/c/d/e/f/g/h/i/j/k"; |
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update(name, A); |
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Map<String, Ref> all = refdb.getRefs(ALL); |
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assertEquals(1, all.size()); |
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Ref r = all.get(name); |
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assertEquals(name, r.getName()); |
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assertFalse(r.isSymbolic()); |
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assertSame(PACKED, r.getStorage()); |
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assertEquals(A, r.getObjectId()); |
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} |
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@Test |
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public void testGetRefs_HeadBranchNotBorn() throws IOException { |
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update("refs/heads/A", A); |
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update("refs/heads/B", B); |
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Map<String, Ref> all = refdb.getRefs(ALL); |
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assertEquals(2, all.size()); |
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assertFalse("no HEAD", all.containsKey(HEAD)); |
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Ref a = all.get("refs/heads/A"); |
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Ref b = all.get("refs/heads/B"); |
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assertEquals(A, a.getObjectId()); |
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assertEquals(B, b.getObjectId()); |
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assertEquals("refs/heads/A", a.getName()); |
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assertEquals("refs/heads/B", b.getName()); |
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} |
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@Test |
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public void testGetRefs_HeadsOnly() throws IOException { |
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update("refs/heads/A", A); |
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update("refs/heads/B", B); |
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update("refs/tags/v1.0", v1_0); |
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Map<String, Ref> heads = refdb.getRefs(R_HEADS); |
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assertEquals(2, heads.size()); |
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Ref a = heads.get("A"); |
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Ref b = heads.get("B"); |
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assertEquals("refs/heads/A", a.getName()); |
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assertEquals("refs/heads/B", b.getName()); |
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assertEquals(A, a.getObjectId()); |
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assertEquals(B, b.getObjectId()); |
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} |
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@Test |
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public void testGetRefs_TagsOnly() throws IOException { |
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update("refs/heads/A", A); |
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update("refs/heads/B", B); |
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update("refs/tags/v1.0", v1_0); |
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Map<String, Ref> tags = refdb.getRefs(R_TAGS); |
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assertEquals(1, tags.size()); |
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Ref a = tags.get("v1.0"); |
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assertEquals("refs/tags/v1.0", a.getName()); |
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assertEquals(v1_0, a.getObjectId()); |
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assertTrue(a.isPeeled()); |
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assertEquals(v1_0.getObject(), a.getPeeledObjectId()); |
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} |
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@Test |
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public void testGetRefs_HeadsSymref() throws IOException { |
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symref("refs/heads/other", "refs/heads/master"); |
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update("refs/heads/master", A); |
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Map<String, Ref> heads = refdb.getRefs(R_HEADS); |
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assertEquals(2, heads.size()); |
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Ref master = heads.get("master"); |
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Ref other = heads.get("other"); |
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assertEquals("refs/heads/master", master.getName()); |
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assertEquals(A, master.getObjectId()); |
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assertEquals("refs/heads/other", other.getName()); |
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assertEquals(A, other.getObjectId()); |
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assertSame(master, other.getTarget()); |
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} |
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@Test |
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public void testGetRefs_InvalidPrefixes() throws IOException { |
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update("refs/heads/A", A); |
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assertTrue("empty refs/heads", refdb.getRefs("refs/heads").isEmpty()); |
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assertTrue("empty objects", refdb.getRefs("objects").isEmpty()); |
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assertTrue("empty objects/", refdb.getRefs("objects/").isEmpty()); |
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} |
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@Test |
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public void testGetRefs_DiscoversNew() throws IOException { |
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update("refs/heads/master", A); |
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Map<String, Ref> orig = refdb.getRefs(ALL); |
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update("refs/heads/next", B); |
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Map<String, Ref> next = refdb.getRefs(ALL); |
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assertEquals(1, orig.size()); |
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assertEquals(2, next.size()); |
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assertFalse(orig.containsKey("refs/heads/next")); |
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assertTrue(next.containsKey("refs/heads/next")); |
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assertEquals(A, next.get("refs/heads/master").getObjectId()); |
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assertEquals(B, next.get("refs/heads/next").getObjectId()); |
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} |
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@Test |
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public void testGetRefs_DiscoversModified() throws IOException { |
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symref(HEAD, "refs/heads/master"); |
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update("refs/heads/master", A); |
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Map<String, Ref> all = refdb.getRefs(ALL); |
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assertEquals(A, all.get(HEAD).getObjectId()); |
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update("refs/heads/master", B); |
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all = refdb.getRefs(ALL); |
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assertEquals(B, all.get(HEAD).getObjectId()); |
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assertEquals(B, refdb.exactRef(HEAD).getObjectId()); |
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} |
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@Test |
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public void testGetRefs_CycleInSymbolicRef() throws IOException { |
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symref("refs/1", "refs/2"); |
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symref("refs/2", "refs/3"); |
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symref("refs/3", "refs/4"); |
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symref("refs/4", "refs/5"); |
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symref("refs/5", "refs/end"); |
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update("refs/end", A); |
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Map<String, Ref> all = refdb.getRefs(ALL); |
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Ref r = all.get("refs/1"); |
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assertNotNull("has 1", r); |
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assertEquals("refs/1", r.getName()); |
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assertEquals(A, r.getObjectId()); |
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assertTrue(r.isSymbolic()); |
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r = r.getTarget(); |
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assertEquals("refs/2", r.getName()); |
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assertEquals(A, r.getObjectId()); |
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assertTrue(r.isSymbolic()); |
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r = r.getTarget(); |
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assertEquals("refs/3", r.getName()); |
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assertEquals(A, r.getObjectId()); |
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assertTrue(r.isSymbolic()); |
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r = r.getTarget(); |
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assertEquals("refs/4", r.getName()); |
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assertEquals(A, r.getObjectId()); |
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assertTrue(r.isSymbolic()); |
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r = r.getTarget(); |
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assertEquals("refs/5", r.getName()); |
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assertEquals(A, r.getObjectId()); |
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assertTrue(r.isSymbolic()); |
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r = r.getTarget(); |
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assertEquals("refs/end", r.getName()); |
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assertEquals(A, r.getObjectId()); |
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assertFalse(r.isSymbolic()); |
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symref("refs/5", "refs/6"); |
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symref("refs/6", "refs/end"); |
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all = refdb.getRefs(ALL); |
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assertNull("mising 1 due to cycle", all.get("refs/1")); |
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assertEquals(A, all.get("refs/2").getObjectId()); |
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assertEquals(A, all.get("refs/3").getObjectId()); |
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assertEquals(A, all.get("refs/4").getObjectId()); |
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assertEquals(A, all.get("refs/5").getObjectId()); |
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assertEquals(A, all.get("refs/6").getObjectId()); |
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assertEquals(A, all.get("refs/end").getObjectId()); |
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} |
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@Test |
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public void testGetRef_NonExistingBranchConfig() throws IOException { |
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assertNull("find branch config", refdb.getRef("config")); |
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assertNull("find branch config", refdb.getRef("refs/heads/config")); |
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} |
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@Test |
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public void testGetRef_FindBranchConfig() throws IOException { |
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update("refs/heads/config", A); |
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for (String t : new String[] { "config", "refs/heads/config" }) { |
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Ref r = refdb.getRef(t); |
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assertNotNull("find branch config (" + t + ")", r); |
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assertEquals("for " + t, "refs/heads/config", r.getName()); |
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assertEquals("for " + t, A, r.getObjectId()); |
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} |
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} |
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@Test |
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public void testFirstExactRef() throws IOException { |
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update("refs/heads/A", A); |
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update("refs/tags/v1.0", v1_0); |
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Ref a = refdb.firstExactRef("refs/heads/A", "refs/tags/v1.0"); |
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Ref one = refdb.firstExactRef("refs/tags/v1.0", "refs/heads/A"); |
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assertEquals("refs/heads/A", a.getName()); |
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assertEquals("refs/tags/v1.0", one.getName()); |
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assertEquals(A, a.getObjectId()); |
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assertEquals(v1_0, one.getObjectId()); |
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} |
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@Test |
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public void testExactRef_DiscoversModified() throws IOException { |
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symref(HEAD, "refs/heads/master"); |
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update("refs/heads/master", A); |
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assertEquals(A, refdb.exactRef(HEAD).getObjectId()); |
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update("refs/heads/master", B); |
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assertEquals(B, refdb.exactRef(HEAD).getObjectId()); |
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} |
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@Test |
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public void testIsNameConflicting() throws IOException { |
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update("refs/heads/a/b", A); |
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update("refs/heads/q", B); |
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||||||
|
// new references cannot replace an existing container
|
||||||
|
assertTrue(refdb.isNameConflicting("refs")); |
||||||
|
assertTrue(refdb.isNameConflicting("refs/heads")); |
||||||
|
assertTrue(refdb.isNameConflicting("refs/heads/a")); |
||||||
|
|
||||||
|
// existing reference is not conflicting
|
||||||
|
assertFalse(refdb.isNameConflicting("refs/heads/a/b")); |
||||||
|
|
||||||
|
// new references are not conflicting
|
||||||
|
assertFalse(refdb.isNameConflicting("refs/heads/a/d")); |
||||||
|
assertFalse(refdb.isNameConflicting("refs/heads/master")); |
||||||
|
|
||||||
|
// existing reference must not be used as a container
|
||||||
|
assertTrue(refdb.isNameConflicting("refs/heads/a/b/c")); |
||||||
|
assertTrue(refdb.isNameConflicting("refs/heads/q/master")); |
||||||
|
|
||||||
|
// refs/txn/ names always conflict.
|
||||||
|
assertTrue(refdb.isNameConflicting(refdb.getTxnCommitted())); |
||||||
|
assertTrue(refdb.isNameConflicting("refs/txn/foo")); |
||||||
|
} |
||||||
|
|
||||||
|
@Test |
||||||
|
public void testUpdate_RefusesRefsTxnNamespace() throws IOException { |
||||||
|
ObjectId txnId = getTxnCommitted(); |
||||||
|
|
||||||
|
RefUpdate u = refdb.newUpdate("refs/txn/tmp", false); |
||||||
|
u.setNewObjectId(B); |
||||||
|
assertEquals(RefUpdate.Result.LOCK_FAILURE, u.update()); |
||||||
|
assertEquals(txnId, getTxnCommitted()); |
||||||
|
|
||||||
|
ReceiveCommand cmd = command(null, B, "refs/txn/tmp"); |
||||||
|
BatchRefUpdate batch = refdb.newBatchUpdate(); |
||||||
|
batch.addCommand(cmd); |
||||||
|
batch.execute(new RevWalk(repo), NullProgressMonitor.INSTANCE); |
||||||
|
|
||||||
|
assertEquals(REJECTED_OTHER_REASON, cmd.getResult()); |
||||||
|
assertEquals(MessageFormat.format(JGitText.get().invalidRefName, |
||||||
|
"refs/txn/tmp"), cmd.getMessage()); |
||||||
|
assertEquals(txnId, getTxnCommitted()); |
||||||
|
} |
||||||
|
|
||||||
|
@Test |
||||||
|
public void testUpdate_RefusesDotLockInRefName() throws IOException { |
||||||
|
ObjectId txnId = getTxnCommitted(); |
||||||
|
|
||||||
|
RefUpdate u = refdb.newUpdate("refs/heads/pu.lock", false); |
||||||
|
u.setNewObjectId(B); |
||||||
|
assertEquals(RefUpdate.Result.REJECTED, u.update()); |
||||||
|
assertEquals(txnId, getTxnCommitted()); |
||||||
|
|
||||||
|
ReceiveCommand cmd = command(null, B, "refs/heads/pu.lock"); |
||||||
|
BatchRefUpdate batch = refdb.newBatchUpdate(); |
||||||
|
batch.addCommand(cmd); |
||||||
|
batch.execute(new RevWalk(repo), NullProgressMonitor.INSTANCE); |
||||||
|
|
||||||
|
assertEquals(REJECTED_OTHER_REASON, cmd.getResult()); |
||||||
|
assertEquals(JGitText.get().funnyRefname, cmd.getMessage()); |
||||||
|
assertEquals(txnId, getTxnCommitted()); |
||||||
|
} |
||||||
|
|
||||||
|
@Test |
||||||
|
public void testBatchRefUpdate_NonFastForwardAborts() throws IOException { |
||||||
|
update("refs/heads/master", A); |
||||||
|
update("refs/heads/masters", B); |
||||||
|
ObjectId txnId = getTxnCommitted(); |
||||||
|
|
||||||
|
List<ReceiveCommand> commands = Arrays.asList( |
||||||
|
command(A, B, "refs/heads/master"), |
||||||
|
command(B, A, "refs/heads/masters")); |
||||||
|
BatchRefUpdate batchUpdate = refdb.newBatchUpdate(); |
||||||
|
batchUpdate.addCommand(commands); |
||||||
|
batchUpdate.execute(new RevWalk(repo), NullProgressMonitor.INSTANCE); |
||||||
|
assertEquals(txnId, getTxnCommitted()); |
||||||
|
|
||||||
|
assertEquals(REJECTED_NONFASTFORWARD, |
||||||
|
commands.get(1).getResult()); |
||||||
|
assertEquals(REJECTED_OTHER_REASON, |
||||||
|
commands.get(0).getResult()); |
||||||
|
assertEquals(JGitText.get().transactionAborted, |
||||||
|
commands.get(0).getMessage()); |
||||||
|
} |
||||||
|
|
||||||
|
@Test |
||||||
|
public void testBatchRefUpdate_ForceUpdate() throws IOException { |
||||||
|
update("refs/heads/master", A); |
||||||
|
update("refs/heads/masters", B); |
||||||
|
ObjectId txnId = getTxnCommitted(); |
||||||
|
|
||||||
|
List<ReceiveCommand> commands = Arrays.asList( |
||||||
|
command(A, B, "refs/heads/master"), |
||||||
|
command(B, A, "refs/heads/masters")); |
||||||
|
BatchRefUpdate batchUpdate = refdb.newBatchUpdate(); |
||||||
|
batchUpdate.setAllowNonFastForwards(true); |
||||||
|
batchUpdate.addCommand(commands); |
||||||
|
batchUpdate.execute(new RevWalk(repo), NullProgressMonitor.INSTANCE); |
||||||
|
assertNotEquals(txnId, getTxnCommitted()); |
||||||
|
|
||||||
|
Map<String, Ref> refs = refdb.getRefs(ALL); |
||||||
|
assertEquals(OK, commands.get(0).getResult()); |
||||||
|
assertEquals(OK, commands.get(1).getResult()); |
||||||
|
assertEquals( |
||||||
|
"[refs/heads/master, refs/heads/masters]", |
||||||
|
refs.keySet().toString()); |
||||||
|
assertEquals(B.getId(), refs.get("refs/heads/master").getObjectId()); |
||||||
|
assertEquals(A.getId(), refs.get("refs/heads/masters").getObjectId()); |
||||||
|
} |
||||||
|
|
||||||
|
@Test |
||||||
|
public void testBatchRefUpdate_NonFastForwardDoesNotDoExpensiveMergeCheck() |
||||||
|
throws IOException { |
||||||
|
update("refs/heads/master", B); |
||||||
|
ObjectId txnId = getTxnCommitted(); |
||||||
|
|
||||||
|
List<ReceiveCommand> commands = Arrays.asList( |
||||||
|
command(B, A, "refs/heads/master")); |
||||||
|
BatchRefUpdate batchUpdate = refdb.newBatchUpdate(); |
||||||
|
batchUpdate.setAllowNonFastForwards(true); |
||||||
|
batchUpdate.addCommand(commands); |
||||||
|
batchUpdate.execute(new RevWalk(repo) { |
||||||
|
@Override |
||||||
|
public boolean isMergedInto(RevCommit base, RevCommit tip) { |
||||||
|
fail("isMergedInto() should not be called"); |
||||||
|
return false; |
||||||
|
} |
||||||
|
}, NullProgressMonitor.INSTANCE); |
||||||
|
assertNotEquals(txnId, getTxnCommitted()); |
||||||
|
|
||||||
|
Map<String, Ref> refs = refdb.getRefs(ALL); |
||||||
|
assertEquals(OK, commands.get(0).getResult()); |
||||||
|
assertEquals(A.getId(), refs.get("refs/heads/master").getObjectId()); |
||||||
|
} |
||||||
|
|
||||||
|
@Test |
||||||
|
public void testBatchRefUpdate_ConflictCausesAbort() throws IOException { |
||||||
|
update("refs/heads/master", A); |
||||||
|
update("refs/heads/masters", B); |
||||||
|
ObjectId txnId = getTxnCommitted(); |
||||||
|
|
||||||
|
List<ReceiveCommand> commands = Arrays.asList( |
||||||
|
command(A, B, "refs/heads/master"), |
||||||
|
command(null, A, "refs/heads/master/x"), |
||||||
|
command(null, A, "refs/heads")); |
||||||
|
BatchRefUpdate batchUpdate = refdb.newBatchUpdate(); |
||||||
|
batchUpdate.setAllowNonFastForwards(true); |
||||||
|
batchUpdate.addCommand(commands); |
||||||
|
batchUpdate.execute(new RevWalk(repo), NullProgressMonitor.INSTANCE); |
||||||
|
assertEquals(txnId, getTxnCommitted()); |
||||||
|
|
||||||
|
assertEquals(LOCK_FAILURE, commands.get(0).getResult()); |
||||||
|
|
||||||
|
assertEquals(REJECTED_OTHER_REASON, commands.get(1).getResult()); |
||||||
|
assertEquals(JGitText.get().transactionAborted, |
||||||
|
commands.get(1).getMessage()); |
||||||
|
|
||||||
|
assertEquals(REJECTED_OTHER_REASON, commands.get(2).getResult()); |
||||||
|
assertEquals(JGitText.get().transactionAborted, |
||||||
|
commands.get(2).getMessage()); |
||||||
|
} |
||||||
|
|
||||||
|
@Test |
||||||
|
public void testBatchRefUpdate_NoConflictIfDeleted() throws IOException { |
||||||
|
update("refs/heads/master", A); |
||||||
|
update("refs/heads/masters", B); |
||||||
|
ObjectId txnId = getTxnCommitted(); |
||||||
|
|
||||||
|
List<ReceiveCommand> commands = Arrays.asList( |
||||||
|
command(A, B, "refs/heads/master"), |
||||||
|
command(null, A, "refs/heads/masters/x"), |
||||||
|
command(B, null, "refs/heads/masters")); |
||||||
|
BatchRefUpdate batchUpdate = refdb.newBatchUpdate(); |
||||||
|
batchUpdate.setAllowNonFastForwards(true); |
||||||
|
batchUpdate.addCommand(commands); |
||||||
|
batchUpdate.execute(new RevWalk(repo), NullProgressMonitor.INSTANCE); |
||||||
|
assertNotEquals(txnId, getTxnCommitted()); |
||||||
|
|
||||||
|
assertEquals(OK, commands.get(0).getResult()); |
||||||
|
assertEquals(OK, commands.get(1).getResult()); |
||||||
|
assertEquals(OK, commands.get(2).getResult()); |
||||||
|
|
||||||
|
Map<String, Ref> refs = refdb.getRefs(ALL); |
||||||
|
assertEquals( |
||||||
|
"[refs/heads/master, refs/heads/masters/x]", |
||||||
|
refs.keySet().toString()); |
||||||
|
assertEquals(A.getId(), refs.get("refs/heads/masters/x").getObjectId()); |
||||||
|
} |
||||||
|
|
||||||
|
private ObjectId getTxnCommitted() throws IOException { |
||||||
|
Ref r = bootstrap.exactRef(refdb.getTxnCommitted()); |
||||||
|
if (r != null && r.getObjectId() != null) { |
||||||
|
return r.getObjectId(); |
||||||
|
} |
||||||
|
return ObjectId.zeroId(); |
||||||
|
} |
||||||
|
|
||||||
|
private static ReceiveCommand command(AnyObjectId a, AnyObjectId b, |
||||||
|
String name) { |
||||||
|
return new ReceiveCommand( |
||||||
|
a != null ? a.copy() : ObjectId.zeroId(), |
||||||
|
b != null ? b.copy() : ObjectId.zeroId(), |
||||||
|
name); |
||||||
|
} |
||||||
|
|
||||||
|
private void symref(final String name, final String dst) |
||||||
|
throws IOException { |
||||||
|
commit(new Function() { |
||||||
|
@Override |
||||||
|
public boolean apply(ObjectReader reader, RefTree tree) |
||||||
|
throws IOException { |
||||||
|
Ref old = tree.exactRef(reader, name); |
||||||
|
Command n = new Command( |
||||||
|
old, |
||||||
|
new SymbolicRef( |
||||||
|
name, |
||||||
|
new ObjectIdRef.Unpeeled(Ref.Storage.NEW, dst, null))); |
||||||
|
return tree.apply(Collections.singleton(n)); |
||||||
|
} |
||||||
|
}); |
||||||
|
} |
||||||
|
|
||||||
|
private void update(final String name, final ObjectId id) |
||||||
|
throws IOException { |
||||||
|
commit(new Function() { |
||||||
|
@Override |
||||||
|
public boolean apply(ObjectReader reader, RefTree tree) |
||||||
|
throws IOException { |
||||||
|
Ref old = tree.exactRef(reader, name); |
||||||
|
Command n; |
||||||
|
try (RevWalk rw = new RevWalk(repo)) { |
||||||
|
n = new Command(old, Command.toRef(rw, id, name, true)); |
||||||
|
} |
||||||
|
return tree.apply(Collections.singleton(n)); |
||||||
|
} |
||||||
|
}); |
||||||
|
} |
||||||
|
|
||||||
|
interface Function { |
||||||
|
boolean apply(ObjectReader reader, RefTree tree) throws IOException; |
||||||
|
} |
||||||
|
|
||||||
|
private void commit(Function fun) throws IOException { |
||||||
|
try (ObjectReader reader = repo.newObjectReader(); |
||||||
|
ObjectInserter inserter = repo.newObjectInserter(); |
||||||
|
RevWalk rw = new RevWalk(reader)) { |
||||||
|
RefUpdate u = bootstrap.newUpdate(refdb.getTxnCommitted(), false); |
||||||
|
CommitBuilder cb = new CommitBuilder(); |
||||||
|
testRepo.setAuthorAndCommitter(cb); |
||||||
|
|
||||||
|
Ref ref = bootstrap.exactRef(refdb.getTxnCommitted()); |
||||||
|
RefTree tree; |
||||||
|
if (ref != null && ref.getObjectId() != null) { |
||||||
|
tree = RefTree.read(reader, rw.parseTree(ref.getObjectId())); |
||||||
|
cb.setParentId(ref.getObjectId()); |
||||||
|
u.setExpectedOldObjectId(ref.getObjectId()); |
||||||
|
} else { |
||||||
|
tree = RefTree.newEmptyTree(); |
||||||
|
u.setExpectedOldObjectId(ObjectId.zeroId()); |
||||||
|
} |
||||||
|
|
||||||
|
assertTrue(fun.apply(reader, tree)); |
||||||
|
cb.setTreeId(tree.writeTree(inserter)); |
||||||
|
u.setNewObjectId(inserter.insert(cb)); |
||||||
|
inserter.flush(); |
||||||
|
switch (u.update(rw)) { |
||||||
|
case NEW: |
||||||
|
case FAST_FORWARD: |
||||||
|
break; |
||||||
|
default: |
||||||
|
fail("Expected " + u.getName() + " to update"); |
||||||
|
} |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
private class InMemRefTreeRepo extends InMemoryRepository { |
||||||
|
private final RefTreeDatabase refs; |
||||||
|
|
||||||
|
InMemRefTreeRepo(DfsRepositoryDescription repoDesc) { |
||||||
|
super(repoDesc); |
||||||
|
refs = new RefTreeDatabase(this, super.getRefDatabase(), |
||||||
|
"refs/txn/committed"); |
||||||
|
RefTreeDatabaseTest.this.refdb = refs; |
||||||
|
} |
||||||
|
|
||||||
|
public RefDatabase getRefDatabase() { |
||||||
|
return refs; |
||||||
|
} |
||||||
|
} |
||||||
|
} |
@ -0,0 +1,98 @@ |
|||||||
|
/* |
||||||
|
* Copyright (C) 2016, Google Inc. |
||||||
|
* 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.reftree; |
||||||
|
|
||||||
|
import java.io.IOException; |
||||||
|
|
||||||
|
import org.eclipse.jgit.lib.ObjectIdRef; |
||||||
|
import org.eclipse.jgit.lib.Ref; |
||||||
|
import org.eclipse.jgit.lib.RefDatabase; |
||||||
|
import org.eclipse.jgit.lib.RefUpdate; |
||||||
|
import org.eclipse.jgit.lib.Repository; |
||||||
|
|
||||||
|
/** Update that always rejects with {@code LOCK_FAILURE}. */ |
||||||
|
class AlwaysFailUpdate extends RefUpdate { |
||||||
|
private final RefTreeDatabase refdb; |
||||||
|
|
||||||
|
AlwaysFailUpdate(RefTreeDatabase refdb, String name) { |
||||||
|
super(new ObjectIdRef.Unpeeled(Ref.Storage.NEW, name, null)); |
||||||
|
this.refdb = refdb; |
||||||
|
setCheckConflicting(false); |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
protected RefDatabase getRefDatabase() { |
||||||
|
return refdb; |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
protected Repository getRepository() { |
||||||
|
return refdb.getRepository(); |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
protected boolean tryLock(boolean deref) throws IOException { |
||||||
|
return false; |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
protected void unlock() { |
||||||
|
// No locks are held here.
|
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
protected Result doUpdate(Result desiredResult) { |
||||||
|
return Result.LOCK_FAILURE; |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
protected Result doDelete(Result desiredResult) { |
||||||
|
return Result.LOCK_FAILURE; |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
protected Result doLink(String target) { |
||||||
|
return Result.LOCK_FAILURE; |
||||||
|
} |
||||||
|
} |
@ -0,0 +1,240 @@ |
|||||||
|
/* |
||||||
|
* Copyright (C) 2016, Google Inc. |
||||||
|
* 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.reftree; |
||||||
|
|
||||||
|
import static org.eclipse.jgit.lib.Constants.OBJ_TREE; |
||||||
|
import static org.eclipse.jgit.transport.ReceiveCommand.Result.NOT_ATTEMPTED; |
||||||
|
import static org.eclipse.jgit.transport.ReceiveCommand.Result.OK; |
||||||
|
import static org.eclipse.jgit.transport.ReceiveCommand.Result.REJECTED_NONFASTFORWARD; |
||||||
|
import static org.eclipse.jgit.transport.ReceiveCommand.Result.REJECTED_OTHER_REASON; |
||||||
|
import static org.eclipse.jgit.transport.ReceiveCommand.Type.UPDATE; |
||||||
|
import static org.eclipse.jgit.transport.ReceiveCommand.Type.UPDATE_NONFASTFORWARD; |
||||||
|
|
||||||
|
import java.io.IOException; |
||||||
|
import java.text.MessageFormat; |
||||||
|
import java.util.ArrayList; |
||||||
|
import java.util.List; |
||||||
|
|
||||||
|
import org.eclipse.jgit.annotations.Nullable; |
||||||
|
import org.eclipse.jgit.internal.JGitText; |
||||||
|
import org.eclipse.jgit.lib.BatchRefUpdate; |
||||||
|
import org.eclipse.jgit.lib.CommitBuilder; |
||||||
|
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.PersonIdent; |
||||||
|
import org.eclipse.jgit.lib.ProgressMonitor; |
||||||
|
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.transport.ReceiveCommand; |
||||||
|
|
||||||
|
/** Batch update a {@link RefTreeDatabase}. */ |
||||||
|
class RefTreeBatch extends BatchRefUpdate { |
||||||
|
private final RefTreeDatabase refdb; |
||||||
|
private Ref src; |
||||||
|
private ObjectId parentCommitId; |
||||||
|
private ObjectId parentTreeId; |
||||||
|
private RefTree tree; |
||||||
|
private PersonIdent author; |
||||||
|
private ObjectId newCommitId; |
||||||
|
|
||||||
|
RefTreeBatch(RefTreeDatabase refdb) { |
||||||
|
super(refdb); |
||||||
|
this.refdb = refdb; |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
public void execute(RevWalk rw, ProgressMonitor monitor) |
||||||
|
throws IOException { |
||||||
|
List<Command> todo = new ArrayList<>(getCommands().size()); |
||||||
|
for (ReceiveCommand c : getCommands()) { |
||||||
|
if (!isAllowNonFastForwards()) { |
||||||
|
if (c.getType() == UPDATE) { |
||||||
|
c.updateType(rw); |
||||||
|
} |
||||||
|
if (c.getType() == UPDATE_NONFASTFORWARD) { |
||||||
|
c.setResult(REJECTED_NONFASTFORWARD); |
||||||
|
reject(); |
||||||
|
return; |
||||||
|
} |
||||||
|
} |
||||||
|
todo.add(new Command(rw, c)); |
||||||
|
} |
||||||
|
init(rw); |
||||||
|
execute(rw, todo); |
||||||
|
} |
||||||
|
|
||||||
|
private void reject() { |
||||||
|
String aborted = JGitText.get().transactionAborted; |
||||||
|
for (ReceiveCommand c : getCommands()) { |
||||||
|
if (c.getResult() == NOT_ATTEMPTED) { |
||||||
|
c.setResult(REJECTED_OTHER_REASON, aborted); |
||||||
|
} |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
void init(RevWalk rw) throws IOException { |
||||||
|
src = refdb.getBootstrap().exactRef(refdb.getTxnCommitted()); |
||||||
|
if (src != null && src.getObjectId() != null) { |
||||||
|
RevCommit c = rw.parseCommit(src.getObjectId()); |
||||||
|
parentCommitId = c; |
||||||
|
parentTreeId = c.getTree(); |
||||||
|
tree = RefTree.read(rw.getObjectReader(), c.getTree()); |
||||||
|
} else { |
||||||
|
parentCommitId = ObjectId.zeroId(); |
||||||
|
parentTreeId = new ObjectInserter.Formatter() |
||||||
|
.idFor(OBJ_TREE, new byte[] {}); |
||||||
|
tree = RefTree.newEmptyTree(); |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
@Nullable |
||||||
|
Ref exactRef(ObjectReader reader, String name) throws IOException { |
||||||
|
return tree.exactRef(reader, name); |
||||||
|
} |
||||||
|
|
||||||
|
/** |
||||||
|
* Execute an update from {@link RefTreeUpdate} or {@link RefTreeRename}. |
||||||
|
* |
||||||
|
* @param rw |
||||||
|
* current RevWalk handling the update or rename. |
||||||
|
* @param todo |
||||||
|
* commands to execute. Must never be a bootstrap reference name. |
||||||
|
* @throws IOException |
||||||
|
* the storage system is unable to read or write data. |
||||||
|
*/ |
||||||
|
void execute(RevWalk rw, List<Command> todo) throws IOException { |
||||||
|
for (Command c : todo) { |
||||||
|
if (c.getResult() != NOT_ATTEMPTED) { |
||||||
|
reject(todo, JGitText.get().transactionAborted); |
||||||
|
return; |
||||||
|
} |
||||||
|
if (refdb.conflictsWithBootstrap(c.getRefName())) { |
||||||
|
c.setResult(REJECTED_OTHER_REASON, MessageFormat |
||||||
|
.format(JGitText.get().invalidRefName, c.getRefName())); |
||||||
|
reject(todo, JGitText.get().transactionAborted); |
||||||
|
return; |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
if (apply(todo) && newCommitId != null) { |
||||||
|
commit(rw, todo); |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
private boolean apply(List<Command> todo) throws IOException { |
||||||
|
if (!tree.apply(todo)) { |
||||||
|
// apply set rejection information on commands.
|
||||||
|
return false; |
||||||
|
} |
||||||
|
|
||||||
|
Repository repo = refdb.getRepository(); |
||||||
|
try (ObjectInserter ins = repo.newObjectInserter()) { |
||||||
|
CommitBuilder b = new CommitBuilder(); |
||||||
|
b.setTreeId(tree.writeTree(ins)); |
||||||
|
if (parentTreeId.equals(b.getTreeId())) { |
||||||
|
for (Command c : todo) { |
||||||
|
c.setResult(OK); |
||||||
|
} |
||||||
|
return true; |
||||||
|
} |
||||||
|
if (!parentCommitId.equals(ObjectId.zeroId())) { |
||||||
|
b.setParentId(parentCommitId); |
||||||
|
} |
||||||
|
|
||||||
|
author = getRefLogIdent(); |
||||||
|
if (author == null) { |
||||||
|
author = new PersonIdent(repo); |
||||||
|
} |
||||||
|
b.setAuthor(author); |
||||||
|
b.setCommitter(author); |
||||||
|
b.setMessage(getRefLogMessage()); |
||||||
|
newCommitId = ins.insert(b); |
||||||
|
ins.flush(); |
||||||
|
} |
||||||
|
return true; |
||||||
|
} |
||||||
|
|
||||||
|
private void commit(RevWalk rw, List<Command> todo) throws IOException { |
||||||
|
ReceiveCommand commit = new ReceiveCommand( |
||||||
|
parentCommitId, newCommitId, |
||||||
|
refdb.getTxnCommitted()); |
||||||
|
updateBootstrap(rw, commit); |
||||||
|
|
||||||
|
if (commit.getResult() == OK) { |
||||||
|
for (Command c : todo) { |
||||||
|
c.setResult(OK); |
||||||
|
} |
||||||
|
} else { |
||||||
|
reject(todo, commit.getResult().name()); |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
private void updateBootstrap(RevWalk rw, ReceiveCommand commit) |
||||||
|
throws IOException { |
||||||
|
BatchRefUpdate u = refdb.getBootstrap().newBatchUpdate(); |
||||||
|
u.setAllowNonFastForwards(true); |
||||||
|
u.setPushCertificate(getPushCertificate()); |
||||||
|
if (isRefLogDisabled()) { |
||||||
|
u.disableRefLog(); |
||||||
|
} else { |
||||||
|
u.setRefLogIdent(author); |
||||||
|
u.setRefLogMessage(getRefLogMessage(), false); |
||||||
|
} |
||||||
|
u.addCommand(commit); |
||||||
|
u.execute(rw, NullProgressMonitor.INSTANCE); |
||||||
|
} |
||||||
|
|
||||||
|
private static void reject(List<Command> todo, String msg) { |
||||||
|
for (Command c : todo) { |
||||||
|
if (c.getResult() == NOT_ATTEMPTED) { |
||||||
|
c.setResult(REJECTED_OTHER_REASON, msg); |
||||||
|
msg = JGitText.get().transactionAborted; |
||||||
|
} |
||||||
|
} |
||||||
|
} |
||||||
|
} |
@ -0,0 +1,314 @@ |
|||||||
|
/* |
||||||
|
* Copyright (C) 2016, Google Inc. |
||||||
|
* 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.reftree; |
||||||
|
|
||||||
|
import static org.eclipse.jgit.lib.Ref.Storage.LOOSE; |
||||||
|
import static org.eclipse.jgit.lib.Ref.Storage.PACKED; |
||||||
|
|
||||||
|
import java.io.IOException; |
||||||
|
import java.util.Collections; |
||||||
|
import java.util.HashMap; |
||||||
|
import java.util.List; |
||||||
|
import java.util.Map; |
||||||
|
|
||||||
|
import org.eclipse.jgit.annotations.Nullable; |
||||||
|
import org.eclipse.jgit.lib.BatchRefUpdate; |
||||||
|
import org.eclipse.jgit.lib.ObjectId; |
||||||
|
import org.eclipse.jgit.lib.ObjectIdRef; |
||||||
|
import org.eclipse.jgit.lib.Ref; |
||||||
|
import org.eclipse.jgit.lib.Ref.Storage; |
||||||
|
import org.eclipse.jgit.lib.RefDatabase; |
||||||
|
import org.eclipse.jgit.lib.RefRename; |
||||||
|
import org.eclipse.jgit.lib.RefUpdate; |
||||||
|
import org.eclipse.jgit.lib.Repository; |
||||||
|
import org.eclipse.jgit.lib.SymbolicRef; |
||||||
|
import org.eclipse.jgit.revwalk.RevObject; |
||||||
|
import org.eclipse.jgit.revwalk.RevTag; |
||||||
|
import org.eclipse.jgit.revwalk.RevWalk; |
||||||
|
import org.eclipse.jgit.util.RefList; |
||||||
|
import org.eclipse.jgit.util.RefMap; |
||||||
|
|
||||||
|
/** |
||||||
|
* Reference database backed by a {@link RefTree}. |
||||||
|
* <p> |
||||||
|
* The storage for RefTreeDatabase has two parts. The main part is a native Git |
||||||
|
* tree object stored under the {@code refs/txn} namespace. To avoid cycles, |
||||||
|
* references to {@code refs/txn} are not stored in that tree object, but |
||||||
|
* instead in a "bootstrap" layer, which is a separate {@link RefDatabase} such |
||||||
|
* as {@link org.eclipse.jgit.internal.storage.file.RefDirectory} using local |
||||||
|
* reference files inside of {@code $GIT_DIR/refs}. |
||||||
|
*/ |
||||||
|
public class RefTreeDatabase extends RefDatabase { |
||||||
|
private final Repository repo; |
||||||
|
private final RefDatabase bootstrap; |
||||||
|
private final String txnCommitted; |
||||||
|
|
||||||
|
@Nullable |
||||||
|
private final String txnNamespace; |
||||||
|
private volatile Scanner.Result refs; |
||||||
|
|
||||||
|
/** |
||||||
|
* Create a RefTreeDb for a repository. |
||||||
|
* |
||||||
|
* @param repo |
||||||
|
* the repository using references in this database. |
||||||
|
* @param bootstrap |
||||||
|
* bootstrap reference database storing the references that |
||||||
|
* anchor the {@link RefTree}. |
||||||
|
* @param txnCommitted |
||||||
|
* name of the bootstrap reference holding the committed RefTree. |
||||||
|
*/ |
||||||
|
public RefTreeDatabase(Repository repo, RefDatabase bootstrap, |
||||||
|
String txnCommitted) { |
||||||
|
this.repo = repo; |
||||||
|
this.bootstrap = bootstrap; |
||||||
|
this.txnNamespace = initNamespace(txnCommitted); |
||||||
|
this.txnCommitted = txnCommitted; |
||||||
|
} |
||||||
|
|
||||||
|
private static String initNamespace(String committed) { |
||||||
|
int s = committed.lastIndexOf('/'); |
||||||
|
if (s < 0) { |
||||||
|
return null; |
||||||
|
} |
||||||
|
return committed.substring(0, s + 1); // Keep trailing '/'.
|
||||||
|
} |
||||||
|
|
||||||
|
Repository getRepository() { |
||||||
|
return repo; |
||||||
|
} |
||||||
|
|
||||||
|
/** |
||||||
|
* @return the bootstrap reference database, which must be used to access |
||||||
|
* {@link #getTxnCommitted()}, {@link #getTxnNamespace()}. |
||||||
|
*/ |
||||||
|
public RefDatabase getBootstrap() { |
||||||
|
return bootstrap; |
||||||
|
} |
||||||
|
|
||||||
|
/** @return name of bootstrap reference anchoring committed RefTree. */ |
||||||
|
public String getTxnCommitted() { |
||||||
|
return txnCommitted; |
||||||
|
} |
||||||
|
|
||||||
|
/** |
||||||
|
* @return namespace used by bootstrap layer, e.g. {@code refs/txn/}. |
||||||
|
* Always ends in {@code '/'}. |
||||||
|
*/ |
||||||
|
@Nullable |
||||||
|
public String getTxnNamespace() { |
||||||
|
return txnNamespace; |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
public void create() throws IOException { |
||||||
|
bootstrap.create(); |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
public boolean performsAtomicTransactions() { |
||||||
|
return true; |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
public void refresh() { |
||||||
|
bootstrap.refresh(); |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
public void close() { |
||||||
|
refs = null; |
||||||
|
bootstrap.close(); |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
public Ref getRef(String name) throws IOException { |
||||||
|
return findRef(getRefs(ALL), name); |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
public Ref exactRef(String name) throws IOException { |
||||||
|
if (conflictsWithBootstrap(name)) { |
||||||
|
return null; |
||||||
|
} |
||||||
|
|
||||||
|
boolean partial = false; |
||||||
|
Ref src = bootstrap.exactRef(txnCommitted); |
||||||
|
Scanner.Result c = refs; |
||||||
|
if (c == null || !c.refTreeId.equals(idOf(src))) { |
||||||
|
c = Scanner.scanRefTree(repo, src, prefixOf(name), false); |
||||||
|
partial = true; |
||||||
|
} |
||||||
|
|
||||||
|
Ref r = c.all.get(name); |
||||||
|
if (r != null && r.isSymbolic()) { |
||||||
|
r = c.sym.get(name); |
||||||
|
if (partial && r.getObjectId() == null) { |
||||||
|
// Attempting exactRef("HEAD") with partial scan will leave
|
||||||
|
// an unresolved symref as its target e.g. refs/heads/master
|
||||||
|
// was not read by the partial scan. Scan everything instead.
|
||||||
|
return getRefs(ALL).get(name); |
||||||
|
} |
||||||
|
} |
||||||
|
return r; |
||||||
|
} |
||||||
|
|
||||||
|
private static String prefixOf(String name) { |
||||||
|
int s = name.lastIndexOf('/'); |
||||||
|
if (s >= 0) { |
||||||
|
return name.substring(0, s); |
||||||
|
} |
||||||
|
return ""; //$NON-NLS-1$
|
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
public Map<String, Ref> getRefs(String prefix) throws IOException { |
||||||
|
if (!prefix.isEmpty() && prefix.charAt(prefix.length() - 1) != '/') { |
||||||
|
return new HashMap<>(0); |
||||||
|
} |
||||||
|
|
||||||
|
Ref src = bootstrap.exactRef(txnCommitted); |
||||||
|
Scanner.Result c = refs; |
||||||
|
if (c == null || !c.refTreeId.equals(idOf(src))) { |
||||||
|
c = Scanner.scanRefTree(repo, src, prefix, true); |
||||||
|
if (prefix.isEmpty()) { |
||||||
|
refs = c; |
||||||
|
} |
||||||
|
} |
||||||
|
return new RefMap(prefix, RefList.<Ref> emptyList(), c.all, c.sym); |
||||||
|
} |
||||||
|
|
||||||
|
private static ObjectId idOf(@Nullable Ref src) { |
||||||
|
return src != null && src.getObjectId() != null |
||||||
|
? src.getObjectId() |
||||||
|
: ObjectId.zeroId(); |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
public List<Ref> getAdditionalRefs() throws IOException { |
||||||
|
return Collections.emptyList(); |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
public Ref peel(Ref ref) throws IOException { |
||||||
|
Ref i = ref.getLeaf(); |
||||||
|
ObjectId id = i.getObjectId(); |
||||||
|
if (i.isPeeled() || id == null) { |
||||||
|
return ref; |
||||||
|
} |
||||||
|
try (RevWalk rw = new RevWalk(repo)) { |
||||||
|
RevObject obj = rw.parseAny(id); |
||||||
|
if (obj instanceof RevTag) { |
||||||
|
ObjectId p = rw.peel(obj).copy(); |
||||||
|
i = new ObjectIdRef.PeeledTag(PACKED, i.getName(), id, p); |
||||||
|
} else { |
||||||
|
i = new ObjectIdRef.PeeledNonTag(PACKED, i.getName(), id); |
||||||
|
} |
||||||
|
} |
||||||
|
return recreate(ref, i); |
||||||
|
} |
||||||
|
|
||||||
|
private static Ref recreate(Ref old, Ref leaf) { |
||||||
|
if (old.isSymbolic()) { |
||||||
|
Ref dst = recreate(old.getTarget(), leaf); |
||||||
|
return new SymbolicRef(old.getName(), dst); |
||||||
|
} |
||||||
|
return leaf; |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
public boolean isNameConflicting(String name) throws IOException { |
||||||
|
return conflictsWithBootstrap(name) |
||||||
|
|| !getConflictingNames(name).isEmpty(); |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
public BatchRefUpdate newBatchUpdate() { |
||||||
|
return new RefTreeBatch(this); |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
public RefUpdate newUpdate(String name, boolean detach) throws IOException { |
||||||
|
if (conflictsWithBootstrap(name)) { |
||||||
|
return new AlwaysFailUpdate(this, name); |
||||||
|
} |
||||||
|
|
||||||
|
Ref r = exactRef(name); |
||||||
|
if (r == null) { |
||||||
|
r = new ObjectIdRef.Unpeeled(Storage.NEW, name, null); |
||||||
|
} |
||||||
|
|
||||||
|
boolean detaching = detach && r.isSymbolic(); |
||||||
|
if (detaching) { |
||||||
|
r = new ObjectIdRef.Unpeeled(LOOSE, name, r.getObjectId()); |
||||||
|
} |
||||||
|
|
||||||
|
RefTreeUpdate u = new RefTreeUpdate(this, r); |
||||||
|
if (detaching) { |
||||||
|
u.setDetachingSymbolicRef(); |
||||||
|
} |
||||||
|
return u; |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
public RefRename newRename(String fromName, String toName) |
||||||
|
throws IOException { |
||||||
|
RefUpdate from = newUpdate(fromName, true); |
||||||
|
RefUpdate to = newUpdate(toName, true); |
||||||
|
return new RefTreeRename(this, from, to); |
||||||
|
} |
||||||
|
|
||||||
|
boolean conflictsWithBootstrap(String name) { |
||||||
|
if (txnNamespace != null && name.startsWith(txnNamespace)) { |
||||||
|
return true; |
||||||
|
} else if (txnCommitted.equals(name)) { |
||||||
|
return true; |
||||||
|
} else if (name.length() > txnCommitted.length() |
||||||
|
&& name.charAt(txnCommitted.length()) == '/' |
||||||
|
&& name.startsWith(txnCommitted)) { |
||||||
|
return true; |
||||||
|
} |
||||||
|
return false; |
||||||
|
} |
||||||
|
} |
@ -0,0 +1,121 @@ |
|||||||
|
/* |
||||||
|
* Copyright (C) 2016, Google Inc. |
||||||
|
* 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.reftree; |
||||||
|
|
||||||
|
import static org.eclipse.jgit.lib.Constants.HEAD; |
||||||
|
import static org.eclipse.jgit.lib.RefUpdate.Result.REJECTED; |
||||||
|
import static org.eclipse.jgit.lib.RefUpdate.Result.RENAMED; |
||||||
|
|
||||||
|
import java.io.IOException; |
||||||
|
import java.util.ArrayList; |
||||||
|
import java.util.List; |
||||||
|
|
||||||
|
import org.eclipse.jgit.lib.ObjectId; |
||||||
|
import org.eclipse.jgit.lib.ObjectIdRef; |
||||||
|
import org.eclipse.jgit.lib.Ref; |
||||||
|
import org.eclipse.jgit.lib.RefRename; |
||||||
|
import org.eclipse.jgit.lib.RefUpdate; |
||||||
|
import org.eclipse.jgit.lib.RefUpdate.Result; |
||||||
|
import org.eclipse.jgit.lib.SymbolicRef; |
||||||
|
import org.eclipse.jgit.revwalk.RevWalk; |
||||||
|
|
||||||
|
/** Single reference rename to {@link RefTreeDatabase}. */ |
||||||
|
class RefTreeRename extends RefRename { |
||||||
|
private final RefTreeDatabase refdb; |
||||||
|
|
||||||
|
RefTreeRename(RefTreeDatabase refdb, RefUpdate src, RefUpdate dst) { |
||||||
|
super(src, dst); |
||||||
|
this.refdb = refdb; |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
protected Result doRename() throws IOException { |
||||||
|
try (RevWalk rw = new RevWalk(refdb.getRepository())) { |
||||||
|
RefTreeBatch batch = new RefTreeBatch(refdb); |
||||||
|
batch.setRefLogIdent(getRefLogIdent()); |
||||||
|
batch.setRefLogMessage(getRefLogMessage(), false); |
||||||
|
batch.init(rw); |
||||||
|
|
||||||
|
Ref head = batch.exactRef(rw.getObjectReader(), HEAD); |
||||||
|
Ref oldRef = batch.exactRef(rw.getObjectReader(), source.getName()); |
||||||
|
if (oldRef == null) { |
||||||
|
return REJECTED; |
||||||
|
} |
||||||
|
|
||||||
|
Ref newRef = asNew(oldRef); |
||||||
|
List<Command> mv = new ArrayList<>(3); |
||||||
|
mv.add(new Command(oldRef, null)); |
||||||
|
mv.add(new Command(null, newRef)); |
||||||
|
if (head != null && head.isSymbolic() |
||||||
|
&& head.getTarget().getName().equals(oldRef.getName())) { |
||||||
|
mv.add(new Command( |
||||||
|
head, |
||||||
|
new SymbolicRef(head.getName(), newRef))); |
||||||
|
} |
||||||
|
batch.execute(rw, mv); |
||||||
|
return RefTreeUpdate.translate(mv.get(1).getResult(), RENAMED); |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
private Ref asNew(Ref src) { |
||||||
|
String name = destination.getName(); |
||||||
|
if (src.isSymbolic()) { |
||||||
|
return new SymbolicRef(name, src.getTarget()); |
||||||
|
} |
||||||
|
|
||||||
|
ObjectId peeled = src.getPeeledObjectId(); |
||||||
|
if (peeled != null) { |
||||||
|
return new ObjectIdRef.PeeledTag( |
||||||
|
src.getStorage(), |
||||||
|
name, |
||||||
|
src.getObjectId(), |
||||||
|
peeled); |
||||||
|
} |
||||||
|
|
||||||
|
return new ObjectIdRef.PeeledNonTag( |
||||||
|
src.getStorage(), |
||||||
|
name, |
||||||
|
src.getObjectId()); |
||||||
|
} |
||||||
|
} |
@ -0,0 +1,176 @@ |
|||||||
|
/* |
||||||
|
* Copyright (C) 2016, Google Inc. |
||||||
|
* 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.reftree; |
||||||
|
|
||||||
|
import static org.eclipse.jgit.lib.Ref.Storage.LOOSE; |
||||||
|
import static org.eclipse.jgit.lib.Ref.Storage.NEW; |
||||||
|
|
||||||
|
import java.io.IOException; |
||||||
|
import java.util.Collections; |
||||||
|
|
||||||
|
import org.eclipse.jgit.annotations.Nullable; |
||||||
|
import org.eclipse.jgit.errors.MissingObjectException; |
||||||
|
import org.eclipse.jgit.lib.ObjectId; |
||||||
|
import org.eclipse.jgit.lib.ObjectIdRef; |
||||||
|
import org.eclipse.jgit.lib.Ref; |
||||||
|
import org.eclipse.jgit.lib.RefDatabase; |
||||||
|
import org.eclipse.jgit.lib.RefUpdate; |
||||||
|
import org.eclipse.jgit.lib.Repository; |
||||||
|
import org.eclipse.jgit.lib.SymbolicRef; |
||||||
|
import org.eclipse.jgit.revwalk.RevObject; |
||||||
|
import org.eclipse.jgit.revwalk.RevTag; |
||||||
|
import org.eclipse.jgit.revwalk.RevWalk; |
||||||
|
import org.eclipse.jgit.transport.ReceiveCommand; |
||||||
|
|
||||||
|
/** Single reference update to {@link RefTreeDatabase}. */ |
||||||
|
class RefTreeUpdate extends RefUpdate { |
||||||
|
private final RefTreeDatabase refdb; |
||||||
|
private RevWalk rw; |
||||||
|
private RefTreeBatch batch; |
||||||
|
private Ref oldRef; |
||||||
|
|
||||||
|
RefTreeUpdate(RefTreeDatabase refdb, Ref ref) { |
||||||
|
super(ref); |
||||||
|
this.refdb = refdb; |
||||||
|
setCheckConflicting(false); // Done automatically by doUpdate.
|
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
protected RefDatabase getRefDatabase() { |
||||||
|
return refdb; |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
protected Repository getRepository() { |
||||||
|
return refdb.getRepository(); |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
protected boolean tryLock(boolean deref) throws IOException { |
||||||
|
rw = new RevWalk(getRepository()); |
||||||
|
batch = new RefTreeBatch(refdb); |
||||||
|
batch.init(rw); |
||||||
|
oldRef = batch.exactRef(rw.getObjectReader(), getName()); |
||||||
|
if (oldRef != null && oldRef.getObjectId() != null) { |
||||||
|
setOldObjectId(oldRef.getObjectId()); |
||||||
|
} else if (oldRef == null && getExpectedOldObjectId() != null) { |
||||||
|
setOldObjectId(ObjectId.zeroId()); |
||||||
|
} |
||||||
|
return true; |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
protected void unlock() { |
||||||
|
batch = null; |
||||||
|
if (rw != null) { |
||||||
|
rw.close(); |
||||||
|
rw = null; |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
protected Result doUpdate(Result desiredResult) throws IOException { |
||||||
|
return run(newRef(getName(), getNewObjectId()), desiredResult); |
||||||
|
} |
||||||
|
|
||||||
|
private Ref newRef(String name, ObjectId id) |
||||||
|
throws MissingObjectException, IOException { |
||||||
|
RevObject o = rw.parseAny(id); |
||||||
|
if (o instanceof RevTag) { |
||||||
|
RevObject p = rw.peel(o); |
||||||
|
return new ObjectIdRef.PeeledTag(LOOSE, name, id, p.copy()); |
||||||
|
} |
||||||
|
return new ObjectIdRef.PeeledNonTag(LOOSE, name, id); |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
protected Result doDelete(Result desiredResult) throws IOException { |
||||||
|
return run(null, desiredResult); |
||||||
|
} |
||||||
|
|
||||||
|
@Override |
||||||
|
protected Result doLink(String target) throws IOException { |
||||||
|
Ref dst = new ObjectIdRef.Unpeeled(NEW, target, null); |
||||||
|
SymbolicRef n = new SymbolicRef(getName(), dst); |
||||||
|
Result desiredResult = getRef().getStorage() == NEW |
||||||
|
? Result.NEW |
||||||
|
: Result.FORCED; |
||||||
|
return run(n, desiredResult); |
||||||
|
} |
||||||
|
|
||||||
|
private Result run(@Nullable Ref newRef, Result desiredResult) |
||||||
|
throws IOException { |
||||||
|
Command c = new Command(oldRef, newRef); |
||||||
|
batch.setRefLogIdent(getRefLogIdent()); |
||||||
|
batch.setRefLogMessage(getRefLogMessage(), isRefLogIncludingResult()); |
||||||
|
batch.execute(rw, Collections.singletonList(c)); |
||||||
|
return translate(c.getResult(), desiredResult); |
||||||
|
} |
||||||
|
|
||||||
|
static Result translate(ReceiveCommand.Result r, Result desiredResult) { |
||||||
|
switch (r) { |
||||||
|
case OK: |
||||||
|
return desiredResult; |
||||||
|
|
||||||
|
case LOCK_FAILURE: |
||||||
|
return Result.LOCK_FAILURE; |
||||||
|
|
||||||
|
case NOT_ATTEMPTED: |
||||||
|
return Result.NOT_ATTEMPTED; |
||||||
|
|
||||||
|
case REJECTED_MISSING_OBJECT: |
||||||
|
return Result.IO_FAILURE; |
||||||
|
|
||||||
|
case REJECTED_CURRENT_BRANCH: |
||||||
|
return Result.REJECTED_CURRENT_BRANCH; |
||||||
|
|
||||||
|
case REJECTED_OTHER_REASON: |
||||||
|
case REJECTED_NOCREATE: |
||||||
|
case REJECTED_NODELETE: |
||||||
|
case REJECTED_NONFASTFORWARD: |
||||||
|
default: |
||||||
|
return Result.REJECTED; |
||||||
|
} |
||||||
|
} |
||||||
|
} |
@ -0,0 +1,286 @@ |
|||||||
|
/* |
||||||
|
* Copyright (C) 2016, Google Inc. |
||||||
|
* 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.reftree; |
||||||
|
|
||||||
|
import static org.eclipse.jgit.lib.RefDatabase.MAX_SYMBOLIC_REF_DEPTH; |
||||||
|
import static org.eclipse.jgit.lib.Constants.OBJ_BLOB; |
||||||
|
import static org.eclipse.jgit.lib.Constants.R_REFS; |
||||||
|
import static org.eclipse.jgit.lib.Constants.encode; |
||||||
|
import static org.eclipse.jgit.lib.FileMode.TYPE_GITLINK; |
||||||
|
import static org.eclipse.jgit.lib.FileMode.TYPE_SYMLINK; |
||||||
|
import static org.eclipse.jgit.lib.FileMode.TYPE_TREE; |
||||||
|
import static org.eclipse.jgit.lib.Ref.Storage.NEW; |
||||||
|
import static org.eclipse.jgit.lib.Ref.Storage.PACKED; |
||||||
|
|
||||||
|
import java.io.IOException; |
||||||
|
|
||||||
|
import org.eclipse.jgit.annotations.Nullable; |
||||||
|
import org.eclipse.jgit.errors.IncorrectObjectTypeException; |
||||||
|
import org.eclipse.jgit.lib.AnyObjectId; |
||||||
|
import org.eclipse.jgit.lib.ObjectId; |
||||||
|
import org.eclipse.jgit.lib.ObjectIdRef; |
||||||
|
import org.eclipse.jgit.lib.ObjectReader; |
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|
import org.eclipse.jgit.lib.Ref; |
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|
import org.eclipse.jgit.lib.Repository; |
||||||
|
import org.eclipse.jgit.lib.SymbolicRef; |
||||||
|
import org.eclipse.jgit.revwalk.RevTree; |
||||||
|
import org.eclipse.jgit.revwalk.RevWalk; |
||||||
|
import org.eclipse.jgit.treewalk.AbstractTreeIterator; |
||||||
|
import org.eclipse.jgit.treewalk.CanonicalTreeParser; |
||||||
|
import org.eclipse.jgit.treewalk.TreeWalk; |
||||||
|
import org.eclipse.jgit.util.Paths; |
||||||
|
import org.eclipse.jgit.util.RawParseUtils; |
||||||
|
import org.eclipse.jgit.util.RefList; |
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|
|
||||||
|
/** A tree parser that extracts references from a {@link RefTree}. */ |
||||||
|
class Scanner { |
||||||
|
private static final int MAX_SYMLINK_BYTES = 10 << 10; |
||||||
|
private static final byte[] BINARY_R_REFS = encode(R_REFS); |
||||||
|
private static final byte[] REFS_DOT_DOT = encode("refs/.."); //$NON-NLS-1$
|
||||||
|
|
||||||
|
static class Result { |
||||||
|
final ObjectId refTreeId; |
||||||
|
final RefList<Ref> all; |
||||||
|
final RefList<Ref> sym; |
||||||
|
|
||||||
|
Result(ObjectId id, RefList<Ref> all, RefList<Ref> sym) { |
||||||
|
this.refTreeId = id; |
||||||
|
this.all = all; |
||||||
|
this.sym = sym; |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
/** |
||||||
|
* Scan a {@link RefTree} and parse entries into {@link Ref} instances. |
||||||
|
* |
||||||
|
* @param repo |
||||||
|
* source repository containing the commit and tree objects that |
||||||
|
* make up the RefTree. |
||||||
|
* @param src |
||||||
|
* bootstrap reference such as {@code refs/txn/committed} to read |
||||||
|
* the reference tree tip from. The current ObjectId will be |
||||||
|
* included in {@link Result#refTreeId}. |
||||||
|
* @param prefix |
||||||
|
* if non-empty a reference prefix to scan only a subdirectory. |
||||||
|
* For example {@code prefix = "refs/heads/"} will limit the scan |
||||||
|
* to only the {@code "heads"} directory of the RefTree, avoiding |
||||||
|
* other directories like {@code "tags"}. Empty string reads all |
||||||
|
* entries in the RefTree. |
||||||
|
* @param recursive |
||||||
|
* if true recurse into subdirectories of the reference tree; |
||||||
|
* false to read only one level. Callers may use false during an |
||||||
|
* implementation of {@code exactRef(String)} where only one |
||||||
|
* reference is needed out of a specific subtree. |
||||||
|
* @return sorted list of references after parsing. |
||||||
|
* @throws IOException |
||||||
|
* tree cannot be accessed from the repository. |
||||||
|
*/ |
||||||
|
static Result scanRefTree(Repository repo, @Nullable Ref src, String prefix, |
||||||
|
boolean recursive) throws IOException { |
||||||
|
RefList.Builder<Ref> all = new RefList.Builder<>(); |
||||||
|
RefList.Builder<Ref> sym = new RefList.Builder<>(); |
||||||
|
|
||||||
|
ObjectId srcId; |
||||||
|
if (src != null && src.getObjectId() != null) { |
||||||
|
try (ObjectReader reader = repo.newObjectReader()) { |
||||||
|
srcId = src.getObjectId(); |
||||||
|
scan(reader, srcId, prefix, recursive, all, sym); |
||||||
|
} |
||||||
|
} else { |
||||||
|
srcId = ObjectId.zeroId(); |
||||||
|
} |
||||||
|
|
||||||
|
RefList<Ref> aList = all.toRefList(); |
||||||
|
for (int idx = 0; idx < sym.size();) { |
||||||
|
Ref s = sym.get(idx); |
||||||
|
Ref r = resolve(s, 0, aList); |
||||||
|
if (r != null) { |
||||||
|
sym.set(idx++, r); |
||||||
|
} else { |
||||||
|
// Remove broken symbolic reference, they don't exist.
|
||||||
|
sym.remove(idx); |
||||||
|
int rm = aList.find(s.getName()); |
||||||
|
if (0 <= rm) { |
||||||
|
aList = aList.remove(rm); |
||||||
|
} |
||||||
|
} |
||||||
|
} |
||||||
|
return new Result(srcId, aList, sym.toRefList()); |
||||||
|
} |
||||||
|
|
||||||
|
private static void scan(ObjectReader reader, AnyObjectId srcId, |
||||||
|
String prefix, boolean recursive, |
||||||
|
RefList.Builder<Ref> all, RefList.Builder<Ref> sym) |
||||||
|
throws IncorrectObjectTypeException, IOException { |
||||||
|
CanonicalTreeParser p = createParserAtPath(reader, srcId, prefix); |
||||||
|
if (p == null) { |
||||||
|
return; |
||||||
|
} |
||||||
|
|
||||||
|
while (!p.eof()) { |
||||||
|
int mode = p.getEntryRawMode(); |
||||||
|
if (mode == TYPE_TREE) { |
||||||
|
if (recursive) { |
||||||
|
p = p.createSubtreeIterator(reader); |
||||||
|
} else { |
||||||
|
p = p.next(); |
||||||
|
} |
||||||
|
continue; |
||||||
|
} |
||||||
|
|
||||||
|
if (!curElementHasPeelSuffix(p)) { |
||||||
|
Ref r = toRef(reader, mode, p); |
||||||
|
if (r != null) { |
||||||
|
all.add(r); |
||||||
|
if (r.isSymbolic()) { |
||||||
|
sym.add(r); |
||||||
|
} |
||||||
|
} |
||||||
|
} else if (mode == TYPE_GITLINK) { |
||||||
|
peel(all, p); |
||||||
|
} |
||||||
|
p = p.next(); |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
private static CanonicalTreeParser createParserAtPath(ObjectReader reader, |
||||||
|
AnyObjectId srcId, String prefix) throws IOException { |
||||||
|
ObjectId root = toTree(reader, srcId); |
||||||
|
if (prefix.isEmpty()) { |
||||||
|
return new CanonicalTreeParser(BINARY_R_REFS, reader, root); |
||||||
|
} |
||||||
|
|
||||||
|
String dir = RefTree.refPath(Paths.stripTrailingSeparator(prefix)); |
||||||
|
TreeWalk tw = TreeWalk.forPath(reader, dir, root); |
||||||
|
if (tw == null || !tw.isSubtree()) { |
||||||
|
return null; |
||||||
|
} |
||||||
|
|
||||||
|
ObjectId id = tw.getObjectId(0); |
||||||
|
return new CanonicalTreeParser(encode(prefix), reader, id); |
||||||
|
} |
||||||
|
|
||||||
|
private static Ref resolve(Ref ref, int depth, RefList<Ref> refs) |
||||||
|
throws IOException { |
||||||
|
if (!ref.isSymbolic()) { |
||||||
|
return ref; |
||||||
|
} else if (MAX_SYMBOLIC_REF_DEPTH <= depth) { |
||||||
|
return null; |
||||||
|
} |
||||||
|
|
||||||
|
Ref r = refs.get(ref.getTarget().getName()); |
||||||
|
if (r == null) { |
||||||
|
return ref; |
||||||
|
} |
||||||
|
|
||||||
|
Ref dst = resolve(r, depth + 1, refs); |
||||||
|
if (dst == null) { |
||||||
|
return null; |
||||||
|
} |
||||||
|
return new SymbolicRef(ref.getName(), dst); |
||||||
|
} |
||||||
|
|
||||||
|
@SuppressWarnings("resource") |
||||||
|
private static RevTree toTree(ObjectReader reader, AnyObjectId id) |
||||||
|
throws IOException { |
||||||
|
return new RevWalk(reader).parseTree(id); |
||||||
|
} |
||||||
|
|
||||||
|
private static boolean curElementHasPeelSuffix(AbstractTreeIterator itr) { |
||||||
|
int n = itr.getEntryPathLength(); |
||||||
|
byte[] c = itr.getEntryPathBuffer(); |
||||||
|
return n > 3 && c[n - 3] == '^' && c[n - 2] == '{' && c[n - 1] == '}'; |
||||||
|
} |
||||||
|
|
||||||
|
private static void peel(RefList.Builder<Ref> all, CanonicalTreeParser p) { |
||||||
|
String name = refName(p, true); |
||||||
|
for (int idx = all.size() - 1; 0 <= idx; idx--) { |
||||||
|
Ref r = all.get(idx); |
||||||
|
int cmp = r.getName().compareTo(name); |
||||||
|
if (cmp == 0) { |
||||||
|
all.set(idx, new ObjectIdRef.PeeledTag(PACKED, r.getName(), |
||||||
|
r.getObjectId(), p.getEntryObjectId())); |
||||||
|
break; |
||||||
|
} else if (cmp < 0) { |
||||||
|
// Stray peeled name without matching base name; skip entry.
|
||||||
|
break; |
||||||
|
} |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
private static Ref toRef(ObjectReader reader, int mode, |
||||||
|
CanonicalTreeParser p) throws IOException { |
||||||
|
if (mode == TYPE_GITLINK) { |
||||||
|
String name = refName(p, false); |
||||||
|
ObjectId id = p.getEntryObjectId(); |
||||||
|
return new ObjectIdRef.PeeledNonTag(PACKED, name, id); |
||||||
|
|
||||||
|
} else if (mode == TYPE_SYMLINK) { |
||||||
|
ObjectId id = p.getEntryObjectId(); |
||||||
|
byte[] bin = reader.open(id, OBJ_BLOB) |
||||||
|
.getCachedBytes(MAX_SYMLINK_BYTES); |
||||||
|
String dst = RawParseUtils.decode(bin); |
||||||
|
Ref trg = new ObjectIdRef.Unpeeled(NEW, dst, null); |
||||||
|
String name = refName(p, false); |
||||||
|
return new SymbolicRef(name, trg); |
||||||
|
} |
||||||
|
return null; |
||||||
|
} |
||||||
|
|
||||||
|
private static String refName(CanonicalTreeParser p, boolean peel) { |
||||||
|
byte[] buf = p.getEntryPathBuffer(); |
||||||
|
int len = p.getEntryPathLength(); |
||||||
|
if (peel) { |
||||||
|
len -= 3; |
||||||
|
} |
||||||
|
int ptr = 0; |
||||||
|
if (RawParseUtils.match(buf, ptr, REFS_DOT_DOT) > 0) { |
||||||
|
ptr = 7; |
||||||
|
} |
||||||
|
return RawParseUtils.decode(buf, ptr, len); |
||||||
|
} |
||||||
|
|
||||||
|
private Scanner() { |
||||||
|
} |
||||||
|
} |
Loading…
Reference in new issue