/// <exception cref="System.IO.IOException"></exception>
private PackLock RenameAndOpenPack(string lockMessage)
{
if (!keepEmpty && GetObjectCount() == 0)
{
CleanupTemporaryFiles();
return null;
}
MessageDigest d = Constants.NewMessageDigest();
byte[] oeBytes = new byte[Constants.OBJECT_ID_LENGTH];
for (int i = 0; i < GetObjectCount(); i++)
{
PackedObjectInfo oe = GetObject(i);
oe.CopyRawTo(oeBytes, 0);
d.Update(oeBytes);
}
string name = ObjectId.FromRaw(d.Digest()).Name;
FilePath packDir = new FilePath(db.GetDirectory(), "pack");
FilePath finalPack = new FilePath(packDir, "pack-" + name + ".pack");
FilePath finalIdx = new FilePath(packDir, "pack-" + name + ".idx");
PackLock keep = new PackLock(finalPack, db.GetFS());
if (!packDir.Exists() && !packDir.Mkdir() && !packDir.Exists())
{
// The objects/pack directory isn't present, and we are unable
// to create it. There is no way to move this pack in.
//
CleanupTemporaryFiles();
throw new IOException(MessageFormat.Format(JGitText.Get().cannotCreateDirectory,
packDir.GetAbsolutePath()));
}
if (finalPack.Exists())
{
// If the pack is already present we should never replace it.
//
CleanupTemporaryFiles();
return null;
}
if (lockMessage != null)
{
// If we have a reason to create a keep file for this pack, do
// so, or fail fast and don't put the pack in place.
//
try
{
if (!keep.Lock(lockMessage))
{
throw new IOException(MessageFormat.Format(JGitText.Get().cannotLockPackIn, finalPack
));
}
}
catch (IOException e)
{
CleanupTemporaryFiles();
throw;
}
}
if (!tmpPack.RenameTo(finalPack))
{
CleanupTemporaryFiles();
keep.Unlock();
throw new IOException(MessageFormat.Format(JGitText.Get().cannotMovePackTo, finalPack
));
}
if (!tmpIdx.RenameTo(finalIdx))
{
CleanupTemporaryFiles();
keep.Unlock();
if (!finalPack.Delete())
{
finalPack.DeleteOnExit();
}
throw new IOException(MessageFormat.Format(JGitText.Get().cannotMoveIndexTo, finalIdx
));
}
try
{
newPack = db.OpenPack(finalPack, finalIdx);
}
catch (IOException err)
{
keep.Unlock();
if (finalPack.Exists())
{
FileUtils.Delete(finalPack);
}
if (finalIdx.Exists())
{
FileUtils.Delete(finalIdx);
}
throw;
}
return lockMessage != null ? keep : null;
}