diff options
Diffstat (limited to 'lib/kernel/Scope.ml')
| -rw-r--r-- | lib/kernel/Scope.ml | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/lib/kernel/Scope.ml b/lib/kernel/Scope.ml index 95896b4..23698ba 100644 --- a/lib/kernel/Scope.ml +++ b/lib/kernel/Scope.ml @@ -21,6 +21,7 @@ let relations {multigroup; schema} = Path.("multigroup" @/ multigroup @/ "schema" @/ schema @/ "relation" @/ this) let path home relation = Path.(of_list (to_list (relations home) @ [relation])) +let denial multigroup = Path.("multigroup" @/ multigroup @/ "denial" @/ this) (* A name leaves out, from the left, what it shares with its home. *) let resolve home text = @@ -112,12 +113,16 @@ module Error = struct "A relation is named relation, schema:relation or multigroup:schema:relation" ("name" |=| Concepts.Value.String name) + let malformed_denial name = + condition "malformed-name" "A denial is named denial or multigroup:denial" + ("name" |=| Concepts.Value.String name) + let moved branch = condition "serialization-conflict" "The branch moved on while this commit was made; retry it" ("branch" |=| Concepts.Value.String branch) end -let publish root ~branch ~home bindings = +let publish ?(denials = []) root ~branch ~home bindings = let open Utilities.Result in let* changes = List.map @@ -128,6 +133,17 @@ let publish root ~branch ~home bindings = bindings |> Utilities.List.sequence in + let* denied = + List.map + (fun (name, v) -> + match String.split_on_char ':' name with + | [d] when d <> "" -> Ok (denial home.multigroup, d, v) + | [m; d] when m <> "" && d <> "" -> Ok (denial m, d, v) + | _ -> Error (Error.malformed_denial name) ) + denials + |> Utilities.List.sequence + in + let changes = changes @ denied in if List.is_empty changes then Ok () else let* state = Path.lookup root Path.("system" @/ "branch" @/ branch @/ this) in |