Method decodeDeltaObjectAt

storage/filesystem/object.go:512–549

(
	p *packfile.Packfile,
	offset int64,
	hash plumbing.Hash,
)

}

func (s *ObjectStorage) decodeDeltaObjectAt(
	p *packfile.Packfile,
	offset int64,
	hash plumbing.Hash,
) (plumbing.EncodedObject, error) {
	scan := p.Scanner()
	header, err := scan.SeekObjectHeader(offset)
	if err != nil {
		return nil, err
	}

	var base plumbing.Hash

	switch header.Type {
	case plumbing.REFDeltaObject:
		base = header.Reference
	case plumbing.OFSDeltaObject:
		base, err = p.FindHash(header.OffsetReference)
		if err != nil {
			return nil, err
		}
	default:
		return s.decodeObjectAt(p, offset)
	}

	obj := &plumbing.MemoryObject{}
	obj.SetType(header.Type)
	w, err := obj.Writer()
	if err != nil {
		return nil, err
	}

	if _, _, err := scan.NextObject(w); err != nil {
		return nil, err
	}

	return newDeltaObject(obj, hash, base, header.Length), nil
}

func (s *ObjectStorage) findObjectInPackfile(h plumbing.Hash) (plumbing.Hash, plumbing.Hash, int64) {
	for packfile, index := range s.index {