catala/compiler/plugin.ml
Louis Gesbert 52b1c25d50 Refactor CLI to use sub-commands
The upside of this is that each command can define specific flags ; there is a
small loss of backwards-compatibility in that the command needs to be the first
argument.

`catala --help` will now only show a summary of commands, with more specific
manpages shown on `catala CMD --help`.

Another point is that the plugin interface is extended to allow plugins to be
registered as subcommands and have their own flags (this will be very useful for
adding flags to the lazy/dot/explanation plugin that has many options).

Note that no efforts has yet been made to specialise the options, the previous
type was just made global for all subcommands.
2023-06-15 18:00:10 +02:00

77 lines
2.2 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
type t = Cmdliner.Cmd.Exit.code Cmdliner.Cmd.t
let backend_plugins : (string, t) Hashtbl.t = Hashtbl.create 17
let register t =
Hashtbl.replace backend_plugins
(String.lowercase_ascii (Cmdliner.Cmd.name t))
t
let list () = Hashtbl.to_seq_values backend_plugins |> List.of_seq
module PluginAPI = struct
open Cmdliner
let register_generic info term = register (Cmd.v info term)
(* For plugins relying on the standard [Driver] *)
type 'ast plugin_apply_fun_typ =
source_file:Pos.input_file ->
output_file:string option ->
scope:Shared_ast.ScopeName.t option ->
'ast ->
Scopelang.Dependency.TVertex.t list ->
unit
end
type 'ast gen = {
name : string;
extension : string;
apply : 'ast PluginAPI.plugin_apply_fun_typ;
}
type handler =
| Dcalc of Shared_ast.untyped Dcalc.Ast.program gen
| Lcalc of Shared_ast.untyped Lcalc.Ast.program gen
| Scalc of Scalc.Ast.program gen
let load_file f =
try
Dynlink.loadfile f;
Message.emit_debug "Plugin %S loaded" f
with e ->
Message.emit_warning "Could not load plugin %S: %s" f (Printexc.to_string e)
let rec load_dir 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)