package irmin

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Commit Store

package irmin

irmin
- Irmin
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Library
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Class type

Private commit store.

Commit Store

include CONTENT_ADDRESSABLE_STORE with type key = Hash.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 = Hash.t

The type for keys.

type value

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 merge : [ `Read | `Write ] t -> info:Info.f -> key option Merge.t

merge is the 3-way merge function for commit keys.

module Key : Hash.TYPED with type t = key and type value = value

Key provides base functions for commit keys.

module Val : 
  Private.Commit.S
    with type t = value
     and type hash = key
    with type hash = Node.key

Val provides functions for commit values.

module Node : Private.Node.STORE with type key = Val.hash

Node is the underlying node store.