Function tvix_store::nar::ingest_nar_and_hash

pub async fn ingest_nar_and_hash<R, BS, DS>(
    blob_service: BS,
    directory_service: DS,
    r: &mut R,
    expected_cahash: &Option<CAHash>,
) -> Result<(Node, [u8; 32], u64), NarIngestionError>
where
    R: AsyncRead + Unpin + Send,
    BS: BlobService + Clone + 'static,
    DS: DirectoryService,

Ingests the contents from a AsyncRead providing NAR into the tvix store, interacting with a BlobService and DirectoryService. Returns the castore root node, as well as the sha256 and size of the NAR contents ingested.