/**
* Write the entry records from memory to disk.
*
* <p>The cache must be locked first by calling {@link #lock()} and receiving true as the return
* value. Applications are encouraged to lock the index, then invoke {@link #read()} to ensure the
* in-memory data is current, prior to updating the in-memory entries.
*
* <p>Once written the lock is closed and must be either committed with {@link #commit()} or
* rolled back with {@link #unlock()}.
*
* @throws IOException the output file could not be created. The caller no longer holds the lock.
*/
public void write() throws IOException {
final LockFile tmp = myLock;
requireLocked(tmp);
try {
writeTo(new SafeBufferedOutputStream(tmp.getOutputStream()));
} catch (IOException err) {
tmp.unlock();
throw err;
} catch (RuntimeException err) {
tmp.unlock();
throw err;
} catch (Error err) {
tmp.unlock();
throw err;
}
}
@Test
public void testReadWriteV3() throws Exception {
final File file = pathOf("gitgit.index.v3");
final DirCache dc = new DirCache(file, FS.DETECTED);
dc.read();
assertEquals(10, dc.getEntryCount());
assertV3TreeEntry(0, "dir1/file1.txt", false, false, dc);
assertV3TreeEntry(1, "dir2/file2.txt", true, false, dc);
assertV3TreeEntry(2, "dir3/file3.txt", false, false, dc);
assertV3TreeEntry(3, "dir3/file3a.txt", true, false, dc);
assertV3TreeEntry(4, "dir4/file4.txt", true, false, dc);
assertV3TreeEntry(5, "dir4/file4a.txt", false, false, dc);
assertV3TreeEntry(6, "file.txt", true, false, dc);
assertV3TreeEntry(7, "newdir1/newfile1.txt", false, true, dc);
assertV3TreeEntry(8, "newdir1/newfile2.txt", false, true, dc);
assertV3TreeEntry(9, "newfile.txt", false, true, dc);
final ByteArrayOutputStream bos = new ByteArrayOutputStream();
dc.writeTo(bos);
final byte[] indexBytes = bos.toByteArray();
final byte[] expectedBytes = IO.readFully(file);
assertArrayEquals(expectedBytes, indexBytes);
}
