merlin: add rules always, regardless the configuration of (merlin) field

src/dune_rules/action_unexpanded.ml

@@ -507,13 +507,9 @@ let rec expand (t : Dune_lang.Action.t) : Action.t Action_expander.t =
     and+ y = E.target y in
     O.Symlink (x, y)
   | Copy_and_add_line_directive (x, y) ->
-    A.with_expander (fun expander ->
-      Expander.context expander
-      |> Context.DB.get
-      |> Memo.map ~f:(fun context ->
-        let+ x = E.dep x
-        and+ y = E.target y in
-        Copy_line_directive.action context ~src:x ~dst:y))
+    let+ x = E.dep x
+    and+ y = E.target y in
+    Copy_line_directive.action ~src:x ~dst:y
   | System x ->
     let+ x = E.string x in
     O.System x

src/dune_rules/buildable_rules.ml

@@ -36,20 +36,16 @@ let gen_select_rules sctx ~dir compile_info =
           let* src_fn = Resolve.read src_fn in
           let src = Path.build (Path.Build.relative dir src_fn) in
           let+ () = Action_builder.path src in
-          let context = Super_context.context sctx in
-          Action.Full.make (Copy_line_directive.action context ~src ~dst))))
+          Action.Full.make (Copy_line_directive.action ~src ~dst))))
 ;;
 
-let with_lib_deps (t : Context.t) compile_info ~dir ~f =
+let with_lib_deps compile_info ~dir ~f =
   let prefix =
-    if Context.merlin t
-    then
-      Lib.Compile.merlin_ident compile_info
-      |> Merlin_ident.merlin_file_path dir
-      |> Path.build
-      |> Action_builder.path
-      |> Action_builder.goal
-    else Action_builder.return ()
+    Lib.Compile.merlin_ident compile_info
+    |> Merlin_ident.merlin_file_path dir
+    |> Path.build
+    |> Action_builder.path
+    |> Action_builder.goal
   in
   Rules.prefix_rules prefix ~f
 ;;

src/dune_rules/buildable_rules.mli

@@ -14,8 +14,7 @@ val gen_select_rules : Super_context.t -> dir:Path.Build.t -> Lib.Compile.t -> u
 
 (** Generate the rules for the [(select ...)] forms in library dependencies *)
 val with_lib_deps
-  :  Context.t
-  -> Lib.Compile.t
+  :  Lib.Compile.t
   -> dir:Path.Build.t
   -> f:(unit -> 'a Memo.t)
   -> 'a Memo.t

src/dune_rules/check_rules.ml

@@ -6,37 +6,28 @@ let dev_files =
   |> Glob.matching_extensions
 ;;
 
-let add_obj_dir sctx ~obj_dir mode =
-  if Super_context.context sctx |> Context.merlin
-  then (
-    let dir_glob =
-      let dir =
-        Path.build
-          (match mode with
-           | Lib_mode.Melange -> Obj_dir.melange_dir obj_dir
-           | Ocaml _ -> Obj_dir.byte_dir obj_dir)
-      in
-      File_selector.of_glob ~dir dev_files
+let add_obj_dir ~obj_dir mode =
+  let dir_glob =
+    let dir =
+      Path.build
+        (match mode with
+         | Lib_mode.Melange -> Obj_dir.melange_dir obj_dir
+         | Ocaml _ -> Obj_dir.byte_dir obj_dir)
     in
-    Rules.Produce.Alias.add_deps
-      (Alias.make Alias0.check ~dir:(Obj_dir.dir obj_dir))
-      (Action_builder.paths_matching_unit ~loc:(Loc.of_pos __POS__) dir_glob))
-  else Memo.return ()
+    File_selector.of_glob ~dir dev_files
+  in
+  Rules.Produce.Alias.add_deps
+    (Alias.make Alias0.check ~dir:(Obj_dir.dir obj_dir))
+    (Action_builder.paths_matching_unit ~loc:(Loc.of_pos __POS__) dir_glob)
 ;;
 
-let add_files sctx ~dir files =
-  if Super_context.context sctx |> Context.merlin
-  then (
-    let alias = Alias.make Alias0.check ~dir in
-    let files = Path.Set.of_list files in
-    Rules.Produce.Alias.add_deps alias (Action_builder.path_set files))
-  else Memo.return ()
+let add_files ~dir files =
+  let alias = Alias.make Alias0.check ~dir in
+  let files = Path.Set.of_list files in
+  Rules.Produce.Alias.add_deps alias (Action_builder.path_set files)
 ;;
 
-let add_cycle_check sctx ~dir modules =
-  if Super_context.context sctx |> Context.merlin
-  then (
-    let alias = Alias.make Alias0.check ~dir in
-    Rules.Produce.Alias.add_deps alias (Action_builder.ignore modules))
-  else Memo.return ()
+let add_cycle_check ~dir modules =
+  let alias = Alias.make Alias0.check ~dir in
+  Rules.Produce.Alias.add_deps alias (Action_builder.ignore modules)
 ;;

src/dune_rules/check_rules.mli

@@ -1,15 +1,5 @@
 open Import
 
-val add_obj_dir
-  :  Super_context.t
-  -> obj_dir:Path.Build.t Obj_dir.t
-  -> Lib_mode.t
-  -> unit Memo.t
-
-val add_files : Super_context.t -> dir:Path.Build.t -> Path.t list -> unit Memo.t
-
-val add_cycle_check
-  :  Super_context.t
-  -> dir:Path.Build.t
-  -> Module.t list Action_builder.t
-  -> unit Memo.t
+val add_obj_dir : obj_dir:Path.Build.t Obj_dir.t -> Lib_mode.t -> unit Memo.t
+val add_files : dir:Path.Build.t -> Path.t list -> unit Memo.t
+val add_cycle_check : dir:Path.Build.t -> Module.t list Action_builder.t -> unit Memo.t

src/dune_rules/context.ml

@@ -67,7 +67,6 @@ end
 
 type builder =
   { profile : Profile.t
-  ; merlin : bool
   ; instrument_with : Lib_name.t list
   ; fdo_target_exe : Path.t option
   ; dynamically_linked_foreign_archives : bool
@@ -96,7 +95,6 @@ module Builder = struct
 
   let empty =
     { profile = Profile.Dev
-    ; merlin = false
     ; instrument_with = []
     ; fdo_target_exe = None
     ; dynamically_linked_foreign_archives = false
@@ -142,16 +140,15 @@ module Builder = struct
     ; fdo_target_exe
     ; dynamically_linked_foreign_archives
     ; instrument_with
-    ; merlin
+    ; merlin = _
     }
     =
     let env =
       let env = Global.env () in
       extend_paths ~env paths
     in
     { t with
-      merlin
-    ; profile
+      profile
     ; dynamically_linked_foreign_archives
     ; instrument_with
     ; fdo_target_exe
@@ -182,7 +179,6 @@ let dynamically_linked_foreign_archives t =
 
 let fdo_target_exe t = t.builder.fdo_target_exe
 let instrument_with t = t.builder.instrument_with
-let merlin t = t.builder.merlin
 let profile t = t.builder.profile
 let equal x y = Context_name.equal x.builder.name y.builder.name
 let hash t = Context_name.hash t.builder.name
@@ -207,7 +203,6 @@ let to_dyn t : Dyn.t =
     [ "name", Context_name.to_dyn t.builder.name
     ; "kind", Kind.to_dyn t.kind
     ; "profile", Profile.to_dyn t.builder.profile
-    ; "merlin", Bool t.builder.merlin
     ; "fdo_target_exe", option path t.builder.fdo_target_exe
     ; "build_dir", Path.Build.to_dyn t.build_dir
     ; "instrument_with", (list Lib_name.to_dyn) t.builder.instrument_with
@@ -522,11 +517,7 @@ module Group = struct
     in
     let targets =
       let builder =
-        { builder with
-          implicit = false
-        ; merlin = false
-        ; for_host = Some (name, Memo.Lazy.force native)
-        }
+        { builder with implicit = false; for_host = Some (name, Memo.Lazy.force native) }
       in
       List.filter_map targets ~f:(function
         | Native -> None
@@ -608,10 +599,7 @@ module Group = struct
         in
         match context with
         | Opam opam -> Builder.set_workspace_base builder opam.base
-        | Default default ->
-          let builder = Builder.set_workspace_base builder default.base in
-          let merlin = workspace.merlin_context = Some (Workspace.Context.name context) in
-          { builder with merlin }
+        | Default default -> Builder.set_workspace_base builder default.base
       in
       match context with
       | Opam { base; switch } ->

src/dune_rules/context.mli

@@ -50,7 +50,6 @@ val default_ocamlpath : t -> Path.t list Memo.t
 val findlib_toolchain : t -> Context_name.t option
 val instrument_with : t -> Lib_name.t list
 val profile : t -> Profile.t
-val merlin : t -> bool
 val equal : t -> t -> bool
 val hash : t -> int
 val to_dyn : t -> Dyn.t

src/dune_rules/copy_line_directive.ml

@@ -58,62 +58,46 @@ let line_directive ~filename:fn ~line_number =
 ;;
 
 module Spec = struct
-  type merlin =
-    | Yes
-    | No
-
-  let bool_of_merlin = function
-    | Yes -> true
-    | No -> false
-  ;;
-
-  type ('path, 'target) t = 'path * 'target * merlin
+  type ('path, 'target) t = 'path * 'target
 
   let name = "copy-line-directive"
   let version = 1
-  let bimap (src, dst, merlin) f g = f src, g dst, merlin
+  let bimap (src, dst) f g = f src, g dst
   let is_useful_to ~memoize = memoize
 
-  let encode (src, dst, merlin) path target : Dune_lang.t =
-    List
-      [ Dune_lang.atom_or_quoted_string "copy-line-directive"
-      ; path src
-      ; target dst
-      ; Dune_lang.atom_or_quoted_string (Bool.to_string (bool_of_merlin merlin))
-      ]
+  let encode (src, dst) path target : Dune_lang.t =
+    List [ Dune_lang.atom_or_quoted_string "copy-line-directive"; path src; target dst ]
   ;;
 
-  let action (src, dst, merlin) ~ectx:_ ~eenv:_ =
+  let action (src, dst) ~ectx:_ ~eenv:_ =
     Io.with_file_in src ~f:(fun ic ->
       Path.build dst
       |> Io.with_file_out ~f:(fun oc ->
         let fn = Path.drop_optional_build_context_maybe_sandboxed src in
         output_string oc (line_directive ~filename:(Path.to_string fn) ~line_number:1);
         Io.copy_channels ic oc));
-    (match merlin with
-     | No -> ()
-     | Yes -> Path.as_in_build_dir src |> Option.iter ~f:(fun src -> DB.set ~src ~dst));
+    Path.as_in_build_dir src |> Option.iter ~f:(fun src -> DB.set ~src ~dst);
     Fiber.return ()
   ;;
 end
 
-let action (context : Context.t) ~src ~dst =
+let action ~src ~dst =
   let module M = struct
     type path = Path.t
     type target = Path.Build.t
 
     module Spec = Spec
 
-    let v = src, dst, if Context.merlin context then Spec.Yes else No
+    let v = src, dst
   end
   in
   Action.Extension (module M)
 ;;
 
-let builder context ~src ~dst =
+let builder ~src ~dst =
   let open Action_builder.O in
   Action_builder.with_file_targets
     ~file_targets:[ dst ]
     (Action_builder.path src
-     >>> Action_builder.return (Action.Full.make (action context ~src ~dst)))
+     >>> Action_builder.return (Action.Full.make (action ~src ~dst)))
 ;;

src/dune_rules/copy_line_directive.mli

@@ -4,10 +4,9 @@ module DB : sig
   val follow_while : Path.Build.t -> f:(Path.Build.t -> 'a option) -> 'a option
 end
 
-val action : Context.t -> src:Path.t -> dst:Path.Build.t -> Action.t
+val action : src:Path.t -> dst:Path.Build.t -> Action.t
 
 val builder
-  :  Context.t
-  -> src:Path.t
+  :  src:Path.t
   -> dst:Path.Build.t
   -> Action.Full.t Action_builder.With_targets.t

src/dune_rules/exe_rules.ml

@@ -129,7 +129,7 @@ let executables_rules
     Dir_contents.ocaml dir_contents
     >>| Ml_sources.modules_and_obj_dir ~for_:(Exe { first_exe })
   in
-  let* () = Check_rules.add_obj_dir sctx ~obj_dir (Ocaml Byte) in
+  let* () = Check_rules.add_obj_dir ~obj_dir (Ocaml Byte) in
   let ctx = Super_context.context sctx in
   let* ocaml = Context.ocaml ctx in
   let project = Scope.project scope in
@@ -220,7 +220,7 @@ let executables_rules
     let* o_files =
       o_files sctx ~dir ~expander ~exes ~linkages ~dir_contents ~requires_compile
     in
-    let* () = Check_rules.add_files sctx ~dir @@ Mode.Map.Multi.to_flat_list o_files in
+    let* () = Check_rules.add_files ~dir @@ Mode.Map.Multi.to_flat_list o_files in
     let buildable = exes.buildable in
     match buildable.ctypes with
     | None ->
@@ -257,7 +257,7 @@ let executables_rules
       link
   in
   let+ () =
-    Memo.parallel_iter dep_graphs.for_exes ~f:(Check_rules.add_cycle_check sctx ~dir)
+    Memo.parallel_iter dep_graphs.for_exes ~f:(Check_rules.add_cycle_check ~dir)
   in
   ( cctx
   , Merlin.make
@@ -316,5 +316,5 @@ let rules ~sctx ~dir ~dir_contents ~scope ~expander (exes : Executables.t) =
     let requires_link = Lib.Compile.requires_link compile_info in
     Bootstrap_info.gen_rules sctx exes ~dir ~requires_link
   in
-  Buildable_rules.with_lib_deps (Super_context.context sctx) compile_info ~dir ~f
+  Buildable_rules.with_lib_deps compile_info ~dir ~f
 ;;

src/dune_rules/lib_rules.ml

@@ -257,7 +257,7 @@ let foreign_rules (library : Foreign.Library.t) ~sctx ~expander ~dir ~dir_conten
     in
     Mode.Map.Multi.for_all_modes o_files_by_mode
   in
-  let* () = Check_rules.add_files sctx ~dir o_files in
+  let* () = Check_rules.add_files ~dir o_files in
   let* standard =
     let+ project = Dune_load.find_project ~dir in
     match Dune_project.use_standard_c_and_cxx_flags project with
@@ -305,7 +305,7 @@ let build_stubs lib ~cctx ~dir ~expander ~requires ~dir_contents ~vlib_stubs_o_f
     Mode.Map.Multi.add_all tbl Mode.Select.All lib_foreign_o_files
   in
   let all_o_files = Mode.Map.Multi.to_flat_list o_files in
-  let* () = Check_rules.add_files sctx ~dir all_o_files in
+  let* () = Check_rules.add_files ~dir all_o_files in
   if List.for_all ~f:List.is_empty [ all_o_files; vlib_stubs_o_files ]
   then Memo.return ()
   else (
@@ -588,7 +588,7 @@ let library_rules
     Memo.Option.iter vimpl ~f:(Virtual_rules.setup_copy_rules_for_impl ~sctx ~dir)
   in
   let* expander = Super_context.expander sctx ~dir in
-  let* () = Check_rules.add_cycle_check sctx ~dir top_sorted_modules in
+  let* () = Check_rules.add_cycle_check ~dir top_sorted_modules in
   let* () = gen_wrapped_compat_modules lib cctx
   and* () = Module_compilation.build_all cctx
   and* lib_info =
@@ -601,7 +601,7 @@ let library_rules
         ~lib_config
     in
     let mode = Lib_mode.Map.Set.for_merlin (Lib_info.modes info) in
-    let+ () = Check_rules.add_obj_dir sctx ~obj_dir mode in
+    let+ () = Check_rules.add_obj_dir ~obj_dir mode in
     info
   in
   let+ () =
@@ -673,5 +673,5 @@ let rules (lib : Library.t) ~sctx ~dir_contents ~dir ~expander ~scope =
       ~ctx_dir:dir
   in
   let* () = Buildable_rules.gen_select_rules sctx compile_info ~dir in
-  Buildable_rules.with_lib_deps (Super_context.context sctx) compile_info ~dir ~f
+  Buildable_rules.with_lib_deps compile_info ~dir ~f
 ;;