DecodeIndex unserializes an index from buf.

ForAllIndexes loads all index files in parallel and calls the given callback.

NewIndex returns a new index.

NewMasterIndex creates a new master index.

IndexFull returns true iff the index is "full enough" to be saved as a preliminary index.

AssociatedSet is a memory efficient implementation of a BlobSet that can store a small data item for each BlobHandle.

Index holds lookup tables for id -> pack.

MasterIndex is a collection of indexes and IDs of chunks that are in the process of being saved.