Revert "Remove unused -no-stdlib and use-stdlib (rescript-lang#6778)"

This reverts commit 9d19bd9.

Author: cknitt

docs/docson/build-schema.json

@@ -472,6 +472,10 @@
       "$ref": "#/definitions/package-specs",
       "description": "ReScript can currently output to [Commonjs](https://en.wikipedia.org/wiki/CommonJS), and [ES6 modules](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/import)"
     },
+    "use-stdlib": {
+      "type": "boolean",
+      "description": "(Experimental) whether to use the OCaml standard library. Default: true"
+    },
     "external-stdlib": {
       "type": "string",
       "description": "Use the external stdlib library instead of the one shipped with the compiler package"

jscomp/bsb/bsb_build_schemas.ml

@@ -45,6 +45,7 @@ let package_specs = "package-specs"
 let type_ = "type"
 let export_all = "all"
 let export_none = "none"
+let use_stdlib = "use-stdlib"
 let external_stdlib = "external-stdlib"
 let reason = "reason"
 let react_jsx = "react-jsx"

jscomp/bsb/bsb_config_parse.ml

@@ -82,6 +82,12 @@ let extract_package_name_and_namespace (map : json_map) : string * string option
       bsc -runtime runtime_dir@version
       ```
 *)
+let check_stdlib (map : json_map) : bool =
+  (*built_in_package*)
+  match map.?(Bsb_build_schemas.use_stdlib) with
+  | Some (False _) -> false
+  | None | Some _ -> true
+
 let extract_gentype_config (map : json_map) : Bsb_config_types.gentype_config =
   match map.?(Bsb_build_schemas.gentypeconfig) with
   | None -> false
@@ -260,6 +266,9 @@ let interpret_json
       (* This line has to be before any calls to Bsb_global_backend.backend, because it'll read the entries
            array from the bsconfig and set the backend_ref to the first entry, if any. *)
 
+      (* The default situation is empty *)
+      let built_in_package : bool = check_stdlib map in
+
       let pp_flags : string option =
         extract_string map Bsb_build_schemas.pp_flags (fun p ->
             if p = "" then
@@ -334,6 +343,7 @@ let interpret_json
               | Pinned_dependency x | Dependency x -> x.package_specs);
             file_groups = groups;
             files_to_install = Queue.create ();
+            built_in_dependency = built_in_package;
             reason_react_jsx;
             jsx;
             generators = extract_generators map;

jscomp/bsb/bsb_config_types.ml

@@ -47,6 +47,7 @@ type t = {
   bs_dependencies : dependencies;
   bs_dev_dependencies : dependencies;
   pinned_dependencies : Set_string.t;
+  built_in_dependency : bool;
   warning : Bsb_warning.t;
   (*TODO: maybe we should always resolve rescript
     so that we can calculate correct relative path in

jscomp/bsb/bsb_ninja_gen.ml

@@ -156,6 +156,7 @@ let output_ninja_and_namespace_map ~per_proj_dir ~package_kind
        package_specs;
        file_groups = { files = bs_file_groups };
        files_to_install;
+       built_in_dependency;
        reason_react_jsx;
        jsx;
        uncurried;
@@ -204,7 +205,7 @@ let output_ninja_and_namespace_map ~per_proj_dir ~package_kind
   in
   let rules : Bsb_ninja_rule.builtin =
     Bsb_ninja_rule.make_custom_rules ~gentype_config
-      ~has_postbuild:js_post_build_cmd ~pp_file
+      ~has_postbuild:js_post_build_cmd ~pp_file ~has_builtin:built_in_dependency
       ~reason_react_jsx ~jsx ~uncurried ~package_specs ~namespace ~digest ~package_name
       ~warnings ~ppx_files ~bsc_flags ~dpkg_incls (* dev dependencies *)
       ~lib_incls (* its own libs *)

jscomp/bsb/bsb_ninja_rule.ml

@@ -89,6 +89,7 @@ type builtin = {
 
 let make_custom_rules ~(gentype_config : Bsb_config_types.gentype_config)
     ~(has_postbuild : string option) ~(pp_file : string option)
+    ~(has_builtin : bool)
     ~(reason_react_jsx : Bsb_config_types.reason_react_jsx option)
     ~(jsx : Bsb_jsx.t) ~(uncurried: bool)  ~(digest : string) ~(package_specs : Bsb_package_specs.t)
     ~(namespace : string option) ~package_name ~warnings
@@ -113,6 +114,7 @@ let make_custom_rules ~(gentype_config : Bsb_config_types.gentype_config)
     if is_dev then Ext_buffer.add_char_string buf ' ' dev_incls;
     Ext_buffer.add_char_string buf ' ' lib_incls;
     if is_dev then Ext_buffer.add_char_string buf ' ' dpkg_incls;
+    if not has_builtin then Ext_buffer.add_string buf " -nostdlib";
     Ext_buffer.add_char_string buf ' ' bsc_flags;
     Ext_buffer.add_char_string buf ' ' warnings;
     (* we need "-w a" in the end position to take effect

jscomp/bsb/bsb_ninja_rule.mli

@@ -69,6 +69,7 @@ val make_custom_rules :
   gentype_config:Bsb_config_types.gentype_config ->
   has_postbuild:string option ->
   pp_file:string option ->
+  has_builtin:bool ->
   reason_react_jsx:Bsb_config_types.reason_react_jsx option ->
   jsx:Bsb_jsx.t ->
   uncurried:bool ->

jscomp/bsc/rescript_compiler_main.ml

@@ -352,6 +352,9 @@ let buckle_script_flags : (string * Bsc_args.spec * string) array =
     "-bs-unsafe-empty-array",  set Config.unsafe_empty_array,
     "*internal* Allow [||] to be polymorphic";
 
+    "-nostdlib",  set Js_config.no_stdlib,
+    "*internal* Don't use stdlib";
+
     "-color", string_call set_color_option,
     "*internal* Enable or disable colors in compiler messages\n\
      The following settings are supported:\n\

jscomp/common/js_config.ml

@@ -54,6 +54,7 @@ let jsx_module = ref React
 let jsx_mode = ref Automatic
 let js_stdout = ref true
 let all_module_aliases = ref false
+let no_stdlib = ref false
 let no_export = ref false
 let as_ppx = ref false
 

jscomp/common/js_config.mli

@@ -87,6 +87,8 @@ val js_stdout : bool ref
 
 val all_module_aliases : bool ref
 
+val no_stdlib : bool ref
+
 val no_export : bool ref
 
 val as_ppx : bool ref