package irmin
Install
Dune Dependency
Authors
Maintainers
Sources
sha256=2a1e6a7577e498fbfeb678d666da210dc48d1344637e8ecb653e1dd88c640b5f
sha512=3fb6f49a1af2f8bab1df5b6f5affaaa09f09fe892a08eb2d9de58138e56646d4a6797f3c087b22875e36e3411218ab2435fe5437ac78f323dd661932af021fad
doc/irmin.mem/Irmin_mem/Make/Backend/Node/index.html
Module Backend.NodeSource
A node store.
include Irmin.Indexable.S with type hash = Hash.t with type key = node_key
Read-only stores
Read-only stores are store where it is only possible to read existing values.
The type for stores. The 'a phantom type carries information about the store mutability.
The type for raw values.
mem t k is true iff k is present in t.
find t k is Some v if k is associated to v in t and None is k is not present in t.
close t frees up all the resources associated with t. Any operations run on a closed handle will raise Closed.
Write the contents of a value to the store, and obtain its key.
Same as add but allows specifying the value's hash directly. The backend might choose to discard that hash and/or can be corrupt if the hash is not consistent.
Indexing maps the hash of a value to a corresponding key of that value in the store. For stores that are addressed by hashes directly, this is typically fun _t h -> Lwt.return (Key.of_hash h); for stores with more complex addressing schemes, index may attempt a lookup operation in the store.
In general, indexing is best-effort and reveals no information about the membership of the value in the store. In particular:
index t hash = Some keydoesn't guaranteemem t key: the value with hashhashmay still be absent from the store;
index t hash = Nonedoesn't guarantee that there is nokeysuch thatmem t keyandKey.to_hash key = hash: the value may still be present in the store under a key that is not indexed.
val batch :
Irmin.Perms.read t ->
([ Irmin.Perms.read | Irmin.Perms.write ] t -> 'a Lwt.t) ->
'a Lwt.tbatch t f applies the writes in f in a separate batch. The exact guarantees depend on the implementation.
module Path = PathPath provides base functions on node paths.
merge is the 3-way merge function for nodes keys.
module Metadata = Schema.MetadataMetadata provides base functions for node metadata.
Contents is the underlying contents store.