robur/git-kv
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Implement exists function

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This commit is contained in:
Romain Calascibetta 2022-09-21 12:01:51 +02:00
parent b1bfa51f2f
commit 2ef62f3307
1 changed files with 12 additions and 4 deletions
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16
src/git_kv.ml
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@ -109,10 +109,18 @@ let of_octets ctx ~remote data =
let edn, branch = split_url remote in
{ ctx ; edn ; branch ; store ; head = Some head }
let exists _t _key =
(* Search.find t.store t.head (`Path (Mirage_kv.Key.segments key)) >>= function *)
(* ([`Value | `Dictionary] option, error) result Lwt.t *)
assert false
let exists t key =
let open Lwt.Infix in
match t.head with
| None -> Lwt.return (Ok None)
| Some head ->
Search.mem t.store head (`Path (Mirage_kv.Key.segments key)) >>= function
| false -> Lwt.return (Ok None)
| true ->
Search.find t.store head (`Path (Mirage_kv.Key.segments key))
>|= Option.get >>= Store.read_exn t.store >>= function
| Blob _ -> Lwt.return (Ok (Some `Value))
| Tree _ | Commit _ | Tag _ -> Lwt.return (Ok (Some `Dictionary))
let get t key =
let open Lwt.Infix in