53 lines
2.1 KiB
OCaml
53 lines
2.1 KiB
OCaml
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(* Copyright (C) 2017--2018 Petter A. Urkedal <paurkedal@gmail.com>
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*
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* This library is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or (at your
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* option) any later version, with the LGPL-3.0 Linking Exception.
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*
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* This library is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* and the LGPL-3.0 Linking Exception along with this library. If not, see
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* <http://www.gnu.org/licenses/> and <https://spdx.org>, respectively.
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*)
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let debug =
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try bool_of_string (Sys.getenv "CAQTI_DEBUG_DYNLOAD")
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with Not_found -> false
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let backend_predicates () =
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(match Sys.backend_type with
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| Sys.Native -> ["native"]
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| Sys.Bytecode -> ["byte"]
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| Sys.Other _ -> [])
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let init = lazy begin
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let predicates = backend_predicates () in
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Findlib.init ();
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Findlib.record_package_predicates predicates;
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List.iter (Findlib.record_package Record_core)
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(Findlib.package_deep_ancestors predicates ["caqti"]);
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if debug then
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Printf.eprintf "\
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[DEBUG] Caqti_dynload: recorded_predicates = %s\n\
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[DEBUG] Caqti_dynload: recorded_packages.core = %s\n\
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[DEBUG] Caqti_dynload: recorded_packages.load = %s\n%!"
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(String.concat " " (Findlib.recorded_predicates ()))
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(String.concat " " (Findlib.recorded_packages Record_core))
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(String.concat " " (Findlib.recorded_packages Record_load))
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end
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let () = Caqti_platform.Connector.define_loader @@ fun pkg ->
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Lazy.force init;
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if debug then
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Printf.eprintf "[DEBUG] Caqti_dynload: requested package: %s\n" pkg;
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(try Ok (Fl_dynload.load_packages ~debug [pkg]) with
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| Dynlink.Error err -> Error (Dynlink.error_message err)
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| Findlib.No_such_package (_pkg, info) -> Error info)
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module Weak_ = struct include Weak end (* for caqti-driver-mariadb *)
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