NewFSRepo creates a new index repo that stores indices on the local filesystem with the given base directory as the root.

NewInverted returns a new inverted index that uses `go-indexer-core` as it's storage backend.

FSIndexRepo implements FullIndexRepo using the local file system to store the indices.

ManifestKey identifies a manifest.

MemIndexRepo implements FullIndexRepo with an in-memory map.

Inverted is the top-level inverted index that maps a multihash to all the shards it is present in.

Manifest are sets of CIDs with no offset indication.

TODO unimplemented.

Repo is the central index repository object that manages full indices and manifests.