objects

type Context struct {
	Compression git.Compression
	Digest      git.Digest
	Pool        afs.ReaderPool

	AllObjects    Set
	PackedObjects Set
	SparseObjects Set
}

type PackContext struct {
	Parent *Context
	PID    git.PackID
	Self   Set
}

type Set interface {
	SetR
	SetW
}

type SetR interface {
	Contains(oid git.ObjectID) bool
	ReadObjectHead(oid git.ObjectID) (*git.Object, error)
	OpenObjectReader(oid git.ObjectID) (*git.Object, io.ReadCloser, error)
}

type SetW interface {
	WriteObject(head *git.Object, data io.Reader) (*git.Object, error)
}