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- /*
- * 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 java.io.File;
- import java.io.FileOutputStream;
- import java.io.IOException;
- import java.util.TreeSet;
-
- import org.eclipse.jgit.treewalk.FileTreeIterator;
- import org.eclipse.jgit.treewalk.FileTreeIteratorWithTimeControl;
- import org.eclipse.jgit.treewalk.NameConflictTreeWalk;
-
- public class RacyGitTests extends RepositoryTestCase {
- public void testIterator() throws IllegalStateException, IOException,
- InterruptedException {
- TreeSet<Long> modTimes = new TreeSet<Long>();
- File lastFile = null;
- for (int i = 0; i < 10; i++) {
- lastFile = new File(db.getWorkTree(), "0." + i);
- lastFile.createNewFile();
- if (i == 5)
- fsTick(lastFile);
- }
- modTimes.add(fsTick(lastFile));
- for (int i = 0; i < 10; i++) {
- lastFile = new File(db.getWorkTree(), "1." + i);
- lastFile.createNewFile();
- }
- modTimes.add(fsTick(lastFile));
- for (int i = 0; i < 10; i++) {
- lastFile = new File(db.getWorkTree(), "2." + i);
- lastFile.createNewFile();
- if (i % 4 == 0)
- fsTick(lastFile);
- }
- FileTreeIteratorWithTimeControl fileIt = new FileTreeIteratorWithTimeControl(
- db, modTimes);
- NameConflictTreeWalk tw = new NameConflictTreeWalk(db);
- tw.addTree(fileIt);
- tw.setRecursive(true);
- FileTreeIterator t;
- long t0 = 0;
- for (int i = 0; i < 10; i++) {
- assertTrue(tw.next());
- t = tw.getTree(0, FileTreeIterator.class);
- if (i == 0)
- t0 = t.getEntryLastModified();
- else
- assertEquals(t0, t.getEntryLastModified());
- }
- long t1 = 0;
- for (int i = 0; i < 10; i++) {
- assertTrue(tw.next());
- t = tw.getTree(0, FileTreeIterator.class);
- if (i == 0) {
- t1 = t.getEntryLastModified();
- assertTrue(t1 > t0);
- } else
- assertEquals(t1, t.getEntryLastModified());
- }
- long t2 = 0;
- for (int i = 0; i < 10; i++) {
- assertTrue(tw.next());
- t = tw.getTree(0, FileTreeIterator.class);
- if (i == 0) {
- t2 = t.getEntryLastModified();
- assertTrue(t2 > t1);
- } else
- assertEquals(t2, t.getEntryLastModified());
- }
- }
-
- public void testRacyGitDetection() throws IOException,
- IllegalStateException, InterruptedException {
- TreeSet<Long> modTimes = new TreeSet<Long>();
- File lastFile;
-
- // wait to ensure that modtimes of the file doesn't match last index
- // file modtime
- modTimes.add(fsTick(db.getIndexFile()));
-
- // create two files
- addToWorkDir("a", "a");
- lastFile = addToWorkDir("b", "b");
-
- // wait to ensure that file-modTimes and therefore index entry modTime
- // doesn't match the modtime of index-file after next persistance
- modTimes.add(fsTick(lastFile));
-
- // now add both files to the index. No racy git expected
- resetIndex(new FileTreeIteratorWithTimeControl(db, modTimes));
-
- 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));
-
- // Remember the last modTime of index file. All modifications times of
- // further modification are translated to this value so it looks that
- // files have been modified in the same time slot as the index file
- modTimes.add(Long.valueOf(db.getIndexFile().lastModified()));
-
- // modify one file
- addToWorkDir("a", "a2");
- // now update the index the index. 'a' has to be racily clean -- because
- // it's modification time is exactly the same as the previous index file
- // mod time.
- resetIndex(new FileTreeIteratorWithTimeControl(db, modTimes));
-
- db.readDirCache();
- // although racily clean a should not be reported as being dirty
- 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));
- }
-
- private File addToWorkDir(String path, String content) throws IOException {
- File f = new File(db.getWorkTree(), path);
- FileOutputStream fos = new FileOutputStream(f);
- try {
- fos.write(content.getBytes(Constants.CHARACTER_ENCODING));
- return f;
- } finally {
- fos.close();
- }
- }
- }
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