Remove packIndex field from FileObjDatabase openPack method.

Previously, the FileObjDatabase required both the pack file path and
index file path to be passed to openPack().  A future change to add
a bitmap index will add a .bitmap file parallel to the pack file
(similar to the .idx file). Update the PackFile to support
automatically loading pack index extensions based on the pack file
path.

Change-Id: Ifc8fc3e57f4afa177ba5a88df87334dbfa799f01

org.eclipse.jgit.junit/src/org/eclipse/jgit/junit/TestRepository.java

@@ -667,7 +667,7 @@ public class TestRepository<R extends Repository> {
 				pw.release();
 			}
 
-			odb.openPack(pack, idx);
+			odb.openPack(pack);
 			updateServerInfo();
 			prunePacked(odb);
 		}

org.eclipse.jgit.test/tst/org/eclipse/jgit/storage/file/PackWriterTest.java

@@ -298,7 +298,7 @@ public class PackWriterTest extends SampleDataRepositoryTestCase {
 		copyFile(JGitTestUtil.getTestResourceFile(
 				"pack-34be9032ac282b11fa9babdc2b2a93ca996c9c2f.idxV2"),
 				crc32Idx);
-		db.openPack(crc32Pack, crc32Idx);
+		db.openPack(crc32Pack);
 
 		writeVerifyPack2(true);
 	}

org.eclipse.jgit.test/tst/org/eclipse/jgit/storage/file/T0004_PackReaderTest.java

@@ -62,7 +62,6 @@ import org.junit.Test;
 public class T0004_PackReaderTest extends SampleDataRepositoryTestCase {
 	private static final String PACK_NAME = "pack-34be9032ac282b11fa9babdc2b2a93ca996c9c2f";
 	private static final File TEST_PACK = JGitTestUtil.getTestResourceFile(PACK_NAME + ".pack");
-	private static final File TEST_IDX = JGitTestUtil.getTestResourceFile(PACK_NAME + ".idx");
 
 	@Test
 	public void test003_lookupCompressedObject() throws IOException {
@@ -71,7 +70,7 @@ public class T0004_PackReaderTest extends SampleDataRepositoryTestCase {
 		final ObjectLoader or;
 
 		id = ObjectId.fromString("902d5476fa249b7abc9d84c611577a81381f0327");
-		pr = new PackFile(TEST_IDX, TEST_PACK);
+		pr = new PackFile(TEST_PACK);
 		or = pr.get(new WindowCursor(null), id);
 		assertNotNull(or);
 		assertEquals(Constants.OBJ_TREE, or.getType());

org.eclipse.jgit/src/org/eclipse/jgit/storage/file/CachedObjectDirectory.java

@@ -252,8 +252,8 @@ class CachedObjectDirectory extends FileObjectDatabase {
 	}
 
 	@Override
-	PackFile openPack(File pack, File idx) throws IOException {
-		return wrapped.openPack(pack, idx);
+	PackFile openPack(File pack) throws IOException {
+		return wrapped.openPack(pack);
 	}
 
 	@Override

org.eclipse.jgit/src/org/eclipse/jgit/storage/file/FileObjectDatabase.java

@@ -288,7 +288,7 @@ abstract class FileObjectDatabase extends ObjectDatabase {
 	abstract InsertLooseObjectResult insertUnpackedObject(File tmp,
 			ObjectId id, boolean createDuplicate) throws IOException;
 
-	abstract PackFile openPack(File pack, File idx) throws IOException;
+	abstract PackFile openPack(File pack) throws IOException;
 
 	abstract FileObjectDatabase newCachedFileObjectDatabase();
 

org.eclipse.jgit/src/org/eclipse/jgit/storage/file/FileRepository.java

@@ -369,14 +369,12 @@ public class FileRepository extends Repository {
 	 *
 	 * @param pack
 	 *            path of the pack file to open.
-	 * @param idx
-	 *            path of the corresponding index file.
 	 * @throws IOException
 	 *             index file could not be opened, read, or is not recognized as
 	 *             a Git pack file index.
 	 */
-	public void openPack(final File pack, final File idx) throws IOException {
-		objectDatabase.openPack(pack, idx);
+	public void openPack(final File pack) throws IOException {
+		objectDatabase.openPack(pack);
 	}
 
 	@Override

org.eclipse.jgit/src/org/eclipse/jgit/storage/file/GC.java

@@ -710,7 +710,7 @@ public class GC {
 				if (delete && tmpIdx.exists())
 					tmpIdx.delete();
 			}
-			return repo.getObjectDatabase().openPack(realPack, realIdx);
+			return repo.getObjectDatabase().openPack(realPack);
 		} finally {
 			pw.release();
 			if (tmpPack != null && tmpPack.exists())

org.eclipse.jgit/src/org/eclipse/jgit/storage/file/ObjectDirectory.java

@@ -327,28 +327,18 @@ public class ObjectDirectory extends FileObjectDatabase {
 	 *
 	 * @param pack
 	 *            path of the pack file to open.
-	 * @param idx
-	 *            path of the corresponding index file.
 	 * @return the pack that was opened and added to the database.
 	 * @throws IOException
 	 *             index file could not be opened, read, or is not recognized as
 	 *             a Git pack file index.
 	 */
-	public PackFile openPack(final File pack, final File idx)
+	public PackFile openPack(final File pack)
 			throws IOException {
 		final String p = pack.getName();
-		final String i = idx.getName();
-
 		if (p.length() != 50 || !p.startsWith("pack-") || !p.endsWith(".pack")) //$NON-NLS-1$
 			throw new IOException(MessageFormat.format(JGitText.get().notAValidPack, pack));
 
-		if (i.length() != 49 || !i.startsWith("pack-") || !i.endsWith(".idx")) //$NON-NLS-1$
-			throw new IOException(MessageFormat.format(JGitText.get().notAValidPack, idx));
-
-		if (!p.substring(0, 45).equals(i.substring(0, 45)))
-			throw new IOException(MessageFormat.format(JGitText.get().packDoesNotMatchIndex, pack));
-
-		PackFile res = new PackFile(idx, pack);
+		PackFile res = new PackFile(pack);
 		insertPack(res);
 		return res;
 	}
@@ -747,8 +737,7 @@ public class ObjectDirectory extends FileObjectDatabase {
 			}
 
 			final File packFile = new File(packDirectory, packName);
-			final File idxFile = new File(packDirectory, indexName);
-			list.add(new PackFile(idxFile, packFile));
+			list.add(new PackFile(packFile));
 			foundNew = true;
 		}
 

org.eclipse.jgit/src/org/eclipse/jgit/storage/file/ObjectDirectoryPackParser.java

@@ -479,7 +479,7 @@ public class ObjectDirectoryPackParser extends PackParser {
 		}
 
 		try {
-			newPack = db.openPack(finalPack, finalIdx);
+			newPack = db.openPack(finalPack);
 		} catch (IOException err) {
 			keep.unlock();
 			if (finalPack.exists())

org.eclipse.jgit/src/org/eclipse/jgit/storage/file/PackFile.java

@@ -45,6 +45,8 @@
 
 package org.eclipse.jgit.storage.file;
 
+import static org.eclipse.jgit.storage.pack.PackConstants.PACK_INDEX_EXT;
+
 import java.io.EOFException;
 import java.io.File;
 import java.io.IOException;
@@ -92,8 +94,6 @@ public class PackFile implements Iterable<PackIndex.MutableEntry> {
 		}
 	};
 
-	private final File idxFile;
-
 	private final File packFile;
 
 	private File keepFile;
@@ -135,13 +135,10 @@ public class PackFile implements Iterable<PackIndex.MutableEntry> {
 	/**
 	 * Construct a reader for an existing, pre-indexed packfile.
 	 *
-	 * @param idxFile
-	 *            path of the <code>.idx</code> file listing the contents.
 	 * @param packFile
 	 *            path of the <code>.pack</code> file holding the data.
 	 */
-	public PackFile(final File idxFile, final File packFile) {
-		this.idxFile = idxFile;
+	public PackFile(final File packFile) {
 		this.packFile = packFile;
 		this.packLastModified = (int) (packFile.lastModified() >> 10);
 
@@ -158,7 +155,7 @@ public class PackFile implements Iterable<PackIndex.MutableEntry> {
 				throw new PackInvalidException(packFile);
 
 			try {
-				final PackIndex idx = PackIndex.open(idxFile);
+				final PackIndex idx = PackIndex.open(extFile(PACK_INDEX_EXT));
 
 				if (packChecksum == null)
 					packChecksum = idx.packChecksum;
@@ -1080,4 +1077,11 @@ public class PackFile implements Iterable<PackIndex.MutableEntry> {
 			list.add(offset);
 		}
 	}
+
+	private File extFile(String ext) {
+		String p = packFile.getName();
+		int dot = p.lastIndexOf('.');
+		String b = (dot < 0) ? p : p.substring(0, dot);
+		return new File(packFile.getParentFile(), b + '.' + ext);
+	}
 }