catala/compiler/plugin.ml
Louis Gesbert e0abb9aa24 Silence warning on duplicate plugin load
a debug is enough, it may happen on normal use
2023-07-11 18:57:05 +02:00

56 lines
1.9 KiB
OCaml

(* This file is part of the Catala compiler, a specification language for tax
and social benefits computation rules. Copyright (C) 2022 Inria, OCamlPro;
contributors: Louis Gesbert <louis.gesbert@ocamlpro.com>
Licensed under the Apache License, Version 2.0 (the "License"); you may not
use this file except in compliance with the License. You may obtain a copy of
the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
License for the specific language governing permissions and limitations under
the License. *)
open Catala_utils
open Cmdliner
type t = unit Cmdliner.Cmd.t
let backend_plugins : (string, t) Hashtbl.t = Hashtbl.create 17
let register info term =
let name = String.lowercase_ascii (Cmd.name (Cmd.v info (Term.const ()))) in
Hashtbl.replace backend_plugins name
(Cmd.v info Term.(term $ Cli.Flags.Global.options))
let list () = Hashtbl.to_seq_values backend_plugins |> List.of_seq
let names () = Hashtbl.to_seq_keys backend_plugins |> List.of_seq
let load_file f =
try
Dynlink.loadfile f;
Message.emit_debug "Plugin %S loaded" f
with
| Dynlink.Error (Dynlink.Module_already_loaded s) ->
Message.emit_debug "Plugin %S (%s) was already loaded, skipping" f s
| e ->
Message.emit_warning "Could not load plugin %S: %s" f (Printexc.to_string e)
let rec load_dir d =
Message.emit_debug "Loading plugins from %s" d;
let dynlink_exts =
if Dynlink.is_native then [".cmxs"] else [".cmo"; ".cma"]
in
Array.iter
(fun f ->
if f.[0] = '.' then ()
else
let f = Filename.concat d f in
if Sys.is_directory f then load_dir f
else if List.exists (Filename.check_suffix f) dynlink_exts then
load_file f)
(Sys.readdir d)