package irmin-pack

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package irmin-pack
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Parameters

module H : Irmin.Hash.S
module Node : Irmin.Private.Node.S with type hash = H.t
module Inter : INTER with type hash = H.t and type Val.metadata = Node.metadata and type Val.step = Node.step
module Pack : Pack.S with type value = Inter.Elt.t and type key = H.t

Signature

include Irmin.CONTENT_ADDRESSABLE_STORE with type key = H.t with type value = Inter.Val.t

Content-addressable stores

Content-addressable stores are store where it is possible to read and add new values. Keys are derived from the values raw contents and hence are deterministic.

type 'a t

The type for content-addressable backend stores. The 'a phantom type carries information about the store mutability.

type key = H.t

The type for keys.

type value = Inter.Val.t

The type for raw values.

val mem : [> `Read ] t -> key -> bool Lwt.t

mem t k is true iff k is present in t.

val find : [> `Read ] t -> key -> value option Lwt.t

find t k is Some v if k is associated to v in t and None is k is not present in t.

val add : [> `Write ] t -> value -> key Lwt.t

Write the contents of a value to the store. It's the responsibility of the content-addressable store to generate a consistent key.

val unsafe_add : [> `Write ] t -> key -> value -> unit Lwt.t

Same as add but allows to specify the key directly. The backend might choose to discared that key and/or can be corrupt if the key scheme is not consistent.

val clear : 'a t -> unit Lwt.t

Clear the store. This operation is expected to be slow.

val batch : [ `Read ] t -> ([ `Read | `Write ] t -> 'a Lwt.t) -> 'a Lwt.t
module Key : Irmin.Hash.S with type t = key

Signature for digest hashes, inspired by Digestif.

val integrity_check : offset:int64 -> length:int -> key -> _ t -> (unit, [ `Wrong_hash | `Absent_value ]) Stdlib.result
val close : _ t -> unit Lwt.t
val clear_caches : 'a t -> unit
val hash : value -> key
val check_hash : key -> key -> unit
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