Merge changes Ifdb33501,Idc7b7bbd,Ia3db8696,I4ef82311,I3ad58d4c, ... into stable-4.2

* changes:
  ConcurrentRepackTest: Don't use deprecated WindowCache.reconfigure
  ConcurrentRepackTest: Open RevWalk in try-with-resource
  CommitOnlyTest: Open RevWalk in try-with-resource
  UnpackedObjectTest: Create ObjectInserter.Formatter in try-with-resource
  FileRepositoryBuilderTest: Use try-with-resource for auto-closeables
  RepositorySetupWorkDirTest: Fix "resource leak" warnings

org.eclipse.jgit.test/tst/org/eclipse/jgit/api/CommitOnlyTest.java

@@ -1294,10 +1294,12 @@ public class CommitOnlyTest extends RepositoryTestCase {
 		try {
 			final Repository repo = git.getRepository();
 			final ObjectId headId = repo.resolve(Constants.HEAD + "^{commit}");
+			try (RevWalk rw = new RevWalk(repo)) {
 				final TreeWalk tw = TreeWalk.forPath(repo, path,
-					new RevWalk(repo).parseTree(headId));
+						rw.parseTree(headId));
 				return new String(tw.getObjectReader().open(tw.getObjectId(0))
 						.getBytes());
+			}
 		} catch (Exception e) {
 			return "";
 		}

org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/file/ConcurrentRepackTest.java

@@ -81,15 +81,14 @@ public class ConcurrentRepackTest extends RepositoryTestCase {
 	public void setUp() throws Exception {
 		WindowCacheConfig windowCacheConfig = new WindowCacheConfig();
 		windowCacheConfig.setPackedGitOpenFiles(1);
-		WindowCache.reconfigure(windowCacheConfig);
+		windowCacheConfig.install();
 		super.setUp();
 	}
 
 	@After
 	public void tearDown() throws Exception {
 		super.tearDown();
-		WindowCacheConfig windowCacheConfig = new WindowCacheConfig();
+		new WindowCacheConfig().install();
-		WindowCache.reconfigure(windowCacheConfig);
 	}
 
 	@Test
@@ -206,12 +205,14 @@ public class ConcurrentRepackTest extends RepositoryTestCase {
 	private static void whackCache() {
 		final WindowCacheConfig config = new WindowCacheConfig();
 		config.setPackedGitOpenFiles(1);
-		WindowCache.reconfigure(config);
+		config.install();
 	}
 
 	private RevObject parse(final AnyObjectId id)
 			throws MissingObjectException, IOException {
-		return new RevWalk(db).parseAny(id);
+		try (RevWalk rw = new RevWalk(db)) {
+			return rw.parseAny(id);
+		}
 	}
 
 	private File[] pack(final Repository src, final RevObject... list)
@@ -280,7 +281,6 @@ public class ConcurrentRepackTest extends RepositoryTestCase {
 
 	private RevObject writeBlob(final Repository repo, final String data)
 			throws IOException {
-		final RevWalk revWalk = new RevWalk(repo);
 		final byte[] bytes = Constants.encode(data);
 		final ObjectId id;
 		try (ObjectInserter inserter = repo.newObjectInserter()) {
@@ -293,6 +293,8 @@ public class ConcurrentRepackTest extends RepositoryTestCase {
 		} catch (MissingObjectException e) {
 			// Ok
 		}
+		try (RevWalk revWalk = new RevWalk(repo)) {
 			return revWalk.lookupBlob(id);
 		}
+	}
 }

org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/file/FileRepositoryBuilderTest.java

@@ -72,7 +72,6 @@ public class FileRepositoryBuilderTest extends LocalDiskRepositoryTestCase {
 				.findGitDir(d).getGitDir());
 	}
 
-	@SuppressWarnings("unused")
 	@Test
 	public void emptyRepositoryFormatVersion() throws Exception {
 		Repository r = createWorkRepository();
@@ -81,10 +80,11 @@ public class FileRepositoryBuilderTest extends LocalDiskRepositoryTestCase {
 				ConfigConstants.CONFIG_KEY_REPO_FORMAT_VERSION, "");
 		config.save();
 
-		new FileRepository(r.getDirectory());
+		try (FileRepository repo = new FileRepository(r.getDirectory())) {
+			// Unused
+		}
 	}
 
-	@SuppressWarnings("unused")
 	@Test
 	public void invalidRepositoryFormatVersion() throws Exception {
 		Repository r = createWorkRepository();
@@ -93,15 +93,13 @@ public class FileRepositoryBuilderTest extends LocalDiskRepositoryTestCase {
 				ConfigConstants.CONFIG_KEY_REPO_FORMAT_VERSION, "notanumber");
 		config.save();
 
-		try {
+		try (FileRepository repo = new FileRepository(r.getDirectory())) {
-			new FileRepository(r.getDirectory());
 			fail("IllegalArgumentException not thrown");
 		} catch (IllegalArgumentException e) {
 			assertNotNull(e.getMessage());
 		}
 	}
 
-	@SuppressWarnings("unused")
 	@Test
 	public void unknownRepositoryFormatVersion() throws Exception {
 		Repository r = createWorkRepository();
@@ -110,22 +108,20 @@ public class FileRepositoryBuilderTest extends LocalDiskRepositoryTestCase {
 				ConfigConstants.CONFIG_KEY_REPO_FORMAT_VERSION, 999999);
 		config.save();
 
-		try {
+		try (FileRepository repo = new FileRepository(r.getDirectory())) {
-			new FileRepository(r.getDirectory());
 			fail("IOException not thrown");
 		} catch (IOException e) {
 			assertNotNull(e.getMessage());
 		}
 	}
 
-	@SuppressWarnings("resource" /* java 7 */)
 	@Test
 	public void absoluteGitDirRef() throws Exception {
 		Repository repo1 = createWorkRepository();
 		File dir = createTempDirectory("dir");
 		File dotGit = new File(dir, Constants.DOT_GIT);
-		new FileWriter(dotGit).append(
+		try (FileWriter writer = new FileWriter(dotGit)) {
-				"gitdir: " + repo1.getDirectory().getAbsolutePath()).close();
+			writer.append("gitdir: " + repo1.getDirectory().getAbsolutePath()).close();
 			FileRepositoryBuilder builder = new FileRepositoryBuilder();
 
 			builder.setWorkTree(dir);
@@ -136,16 +132,16 @@ public class FileRepositoryBuilderTest extends LocalDiskRepositoryTestCase {
 					.getDirectory().getAbsolutePath());
 			assertEquals(dir, repo2.getWorkTree());
 		}
+	}
 
-	@SuppressWarnings("resource" /* java 7 */)
 	@Test
 	public void relativeGitDirRef() throws Exception {
 		Repository repo1 = createWorkRepository();
 		File dir = new File(repo1.getWorkTree(), "dir");
 		assertTrue(dir.mkdir());
 		File dotGit = new File(dir, Constants.DOT_GIT);
-		new FileWriter(dotGit).append("gitdir: ../" + Constants.DOT_GIT)
+		try (FileWriter writer = new FileWriter(dotGit)) {
-				.close();
+			writer.append("gitdir: ../" + Constants.DOT_GIT).close();
 
 			FileRepositoryBuilder builder = new FileRepositoryBuilder();
 			builder.setWorkTree(dir);
@@ -158,14 +154,15 @@ public class FileRepositoryBuilderTest extends LocalDiskRepositoryTestCase {
 					.getDirectory().getCanonicalPath());
 			assertEquals(dir, repo2.getWorkTree());
 		}
+	}
 
-	@SuppressWarnings("resource" /* java 7 */)
 	@Test
 	public void scanWithGitDirRef() throws Exception {
 		Repository repo1 = createWorkRepository();
 		File dir = createTempDirectory("dir");
 		File dotGit = new File(dir, Constants.DOT_GIT);
-		new FileWriter(dotGit).append(
+		try (FileWriter writer = new FileWriter(dotGit)) {
+			writer.append(
 					"gitdir: " + repo1.getDirectory().getAbsolutePath()).close();
 			FileRepositoryBuilder builder = new FileRepositoryBuilder();
 
@@ -181,4 +178,5 @@ public class FileRepositoryBuilderTest extends LocalDiskRepositoryTestCase {
 					.getDirectory().getCanonicalPath());
 			assertEquals(dir, repo2.getWorkTree());
 		}
+	}
 }

org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/file/RepositorySetupWorkDirTest.java

@@ -73,13 +73,14 @@ public class RepositorySetupWorkDirTest extends LocalDiskRepositoryTestCase {
 	public void testIsBare_CreateRepositoryFromArbitraryGitDir()
 			throws Exception {
 		File gitDir = getFile("workdir");
-		assertTrue(new FileRepository(gitDir).isBare());
+		Repository repo = new FileRepositoryBuilder().setGitDir(gitDir).build();
+		assertTrue(repo.isBare());
 	}
 
 	@Test
 	public void testNotBare_CreateRepositoryFromDotGitGitDir() throws Exception {
 		File gitDir = getFile("workdir", Constants.DOT_GIT);
-		Repository repo = new FileRepository(gitDir);
+		Repository repo = new FileRepositoryBuilder().setGitDir(gitDir).build();
 		assertFalse(repo.isBare());
 		assertWorkdirPath(repo, "workdir");
 		assertGitdirPath(repo, "workdir", Constants.DOT_GIT);
@@ -89,7 +90,7 @@ public class RepositorySetupWorkDirTest extends LocalDiskRepositoryTestCase {
 	public void testWorkdirIsParentDir_CreateRepositoryFromDotGitGitDir()
 			throws Exception {
 		File gitDir = getFile("workdir", Constants.DOT_GIT);
-		Repository repo = new FileRepository(gitDir);
+		Repository repo = new FileRepositoryBuilder().setGitDir(gitDir).build();
 		String workdir = repo.getWorkTree().getName();
 		assertEquals(workdir, "workdir");
 	}
@@ -157,8 +158,8 @@ public class RepositorySetupWorkDirTest extends LocalDiskRepositoryTestCase {
 	@Test
 	public void testExceptionThrown_BareRepoGetWorkDir() throws Exception {
 		File gitDir = getFile("workdir");
-		try {
+		try (Repository repo = new FileRepository(gitDir)) {
-			new FileRepository(gitDir).getWorkTree();
+			repo.getWorkTree();
 			fail("Expected NoWorkTreeException missing");
 		} catch (NoWorkTreeException e) {
 			// expected
@@ -168,8 +169,8 @@ public class RepositorySetupWorkDirTest extends LocalDiskRepositoryTestCase {
 	@Test
 	public void testExceptionThrown_BareRepoGetIndex() throws Exception {
 		File gitDir = getFile("workdir");
-		try {
+		try (Repository repo = new FileRepository(gitDir)) {
-			new FileRepository(gitDir).readDirCache();
+			repo.readDirCache();
 			fail("Expected NoWorkTreeException missing");
 		} catch (NoWorkTreeException e) {
 			// expected
@@ -179,8 +180,8 @@ public class RepositorySetupWorkDirTest extends LocalDiskRepositoryTestCase {
 	@Test
 	public void testExceptionThrown_BareRepoGetIndexFile() throws Exception {
 		File gitDir = getFile("workdir");
-		try {
+		try (Repository repo = new FileRepository(gitDir)) {
-			new FileRepository(gitDir).getIndexFile();
+			repo.getIndexFile();
 			fail("Expected NoWorkTreeException missing");
 		} catch (NoWorkTreeException e) {
 			// expected

org.eclipse.jgit.test/tst/org/eclipse/jgit/internal/storage/file/UnpackedObjectTest.java

@@ -143,7 +143,7 @@ public class UnpackedObjectTest extends LocalDiskRepositoryTestCase {
 	public void testStandardFormat_LargeObject() throws Exception {
 		final int type = Constants.OBJ_BLOB;
 		byte[] data = getRng().nextBytes(streamThreshold + 5);
-		ObjectId id = new ObjectInserter.Formatter().idFor(type, data);
+		ObjectId id = getId(type, data);
 		write(id, compressStandardFormat(type, data));
 
 		ObjectLoader ol;
@@ -306,7 +306,7 @@ public class UnpackedObjectTest extends LocalDiskRepositoryTestCase {
 			throws Exception {
 		final int type = Constants.OBJ_BLOB;
 		byte[] data = getRng().nextBytes(streamThreshold + 5);
-		ObjectId id = new ObjectInserter.Formatter().idFor(type, data);
+		ObjectId id = getId(type, data);
 		byte[] gz = compressStandardFormat(type, data);
 		gz[gz.length - 1] = 0;
 		gz[gz.length - 2] = 0;
@@ -344,7 +344,7 @@ public class UnpackedObjectTest extends LocalDiskRepositoryTestCase {
 			throws Exception {
 		final int type = Constants.OBJ_BLOB;
 		byte[] data = getRng().nextBytes(streamThreshold + 5);
-		ObjectId id = new ObjectInserter.Formatter().idFor(type, data);
+		ObjectId id = getId(type, data);
 		byte[] gz = compressStandardFormat(type, data);
 		byte[] tr = new byte[gz.length - 1];
 		System.arraycopy(gz, 0, tr, 0, tr.length);
@@ -379,7 +379,7 @@ public class UnpackedObjectTest extends LocalDiskRepositoryTestCase {
 			throws Exception {
 		final int type = Constants.OBJ_BLOB;
 		byte[] data = getRng().nextBytes(streamThreshold + 5);
-		ObjectId id = new ObjectInserter.Formatter().idFor(type, data);
+		ObjectId id = getId(type, data);
 		byte[] gz = compressStandardFormat(type, data);
 		byte[] tr = new byte[gz.length + 1];
 		System.arraycopy(gz, 0, tr, 0, gz.length);
@@ -438,7 +438,7 @@ public class UnpackedObjectTest extends LocalDiskRepositoryTestCase {
 	public void testPackFormat_LargeObject() throws Exception {
 		final int type = Constants.OBJ_BLOB;
 		byte[] data = getRng().nextBytes(streamThreshold + 5);
-		ObjectId id = new ObjectInserter.Formatter().idFor(type, data);
+		ObjectId id = getId(type, data);
 		write(id, compressPackFormat(type, data));
 
 		ObjectLoader ol;
@@ -578,4 +578,10 @@ public class UnpackedObjectTest extends LocalDiskRepositoryTestCase {
 			out.close();
 		}
 	}
+
+	private ObjectId getId(int type, byte[] data) {
+		try (ObjectInserter.Formatter formatter = new ObjectInserter.Formatter()) {
+			return formatter.idFor(type, data);
+		}
+	}
 }