| /* |
| * Copyright (C) 2010, Christian Halstrick <christian.halstrick@sap.com> |
| * and other copyright owners as documented in the project's IP log. |
| * |
| * This program and the accompanying materials are made available |
| * under the terms of the Eclipse Distribution License v1.0 which |
| * accompanies this distribution, is reproduced below, and is |
| * available at http://www.eclipse.org/org/documents/edl-v10.php |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * |
| * - Neither the name of the Eclipse Foundation, Inc. nor the |
| * names of its contributors may be used to endorse or promote |
| * products derived from this software without specific prior |
| * written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
| * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| package org.eclipse.jgit.lib; |
| |
| import static java.nio.charset.StandardCharsets.UTF_8; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.time.Instant; |
| |
| import org.eclipse.jgit.api.Git; |
| import org.eclipse.jgit.dircache.DirCache; |
| import org.eclipse.jgit.junit.RepositoryTestCase; |
| import org.eclipse.jgit.junit.time.TimeUtil; |
| import org.eclipse.jgit.treewalk.FileTreeIterator; |
| import org.eclipse.jgit.treewalk.WorkingTreeOptions; |
| import org.eclipse.jgit.util.FS; |
| import org.junit.Test; |
| |
| public class RacyGitTests extends RepositoryTestCase { |
| |
| @Test |
| public void testRacyGitDetection() throws Exception { |
| // Reset to force creation of index file |
| try (Git git = new Git(db)) { |
| git.reset().call(); |
| } |
| |
| // wait to ensure that modtimes of the file doesn't match last index |
| // file modtime |
| fsTick(db.getIndexFile()); |
| |
| // create two files |
| File a = writeToWorkDir("a", "a"); |
| File b = writeToWorkDir("b", "b"); |
| TimeUtil.setLastModifiedOf(a.toPath(), b.toPath()); |
| TimeUtil.setLastModifiedOf(b.toPath(), b.toPath()); |
| |
| // wait to ensure that file-modTimes and therefore index entry modTime |
| // doesn't match the modtime of index-file after next persistance |
| fsTick(b); |
| |
| // now add both files to the index. No racy git expected |
| resetIndex(new FileTreeIterator(db)); |
| |
| assertEquals( |
| "[a, mode:100644, time:t0, length:1, content:a]" |
| + "[b, mode:100644, time:t0, length:1, content:b]", |
| indexState(SMUDGE | MOD_TIME | LENGTH | CONTENT)); |
| |
| // wait to ensure the file 'a' is updated at t1. |
| fsTick(db.getIndexFile()); |
| |
| // Create a racy git situation. This is a situation that the index is |
| // updated and then a file is modified within the same tick of the |
| // filesystem timestamp resolution. By changing the index file |
| // artificially, we create a fake racy situation. |
| File updatedA = writeToWorkDir("a", "a2"); |
| Instant newLastModified = TimeUtil |
| .setLastModifiedWithOffset(updatedA.toPath(), 100L); |
| resetIndex(new FileTreeIterator(db)); |
| FS.DETECTED.setLastModified(db.getIndexFile().toPath(), |
| newLastModified); |
| |
| DirCache dc = db.readDirCache(); |
| // check index state: although racily clean a should not be reported as |
| // being dirty since we forcefully reset the index to match the working |
| // tree |
| assertEquals( |
| "[a, mode:100644, time:t1, smudged, length:0, content:a2]" |
| + "[b, mode:100644, time:t0, length:1, content:b]", |
| indexState(SMUDGE | MOD_TIME | LENGTH | CONTENT)); |
| |
| // compare state of files in working tree with index to check that |
| // FileTreeIterator.isModified() works as expected |
| FileTreeIterator f = new FileTreeIterator(db.getWorkTree(), db.getFS(), |
| db.getConfig().get(WorkingTreeOptions.KEY)); |
| assertTrue(f.findFile("a")); |
| try (ObjectReader reader = db.newObjectReader()) { |
| assertFalse(f.isModified(dc.getEntry("a"), false, reader)); |
| } |
| } |
| |
| private File writeToWorkDir(String path, String content) throws IOException { |
| File f = new File(db.getWorkTree(), path); |
| try (FileOutputStream fos = new FileOutputStream(f)) { |
| fos.write(content.getBytes(UTF_8)); |
| return f; |
| } |
| } |
| } |