Move functions that operate on more than 1 module to Lib_deps.L

Signed-off-by: Rudi Grinberg <rudi.grinberg@gmail.com>

src/compilation_context.ml

@@ -16,7 +16,7 @@ module Includes = struct
       let cmi_includes =
         Arg_spec.S [ iflags
                    ; Hidden_deps
-                       (Lib_deps.file_deps sctx libs ~ext:".cmi")
+                       (Lib_deps.L.file_deps sctx libs ~ext:".cmi")
                    ]
       in
       let cmx_includes =
@@ -29,9 +29,9 @@ module Includes = struct
                        ".cmi"
                      else
                        ".cmi-and-.cmx"))
-                  |> Lib_deps.file_deps_with_exts sctx
+                  |> Lib_deps.L.file_deps_with_exts sctx
                 else
-                  Lib_deps.file_deps sctx libs ~ext:".cmi-and-.cmx"
+                  Lib_deps.L.file_deps sctx libs ~ext:".cmi-and-.cmx"
               )
           ]
       in

src/lib_deps.ml

@@ -17,6 +17,7 @@ let setup_file_deps_group_alias t ~dir ~exts lib =
          (lib_files_alias ~dir ~name:(Library.best_name lib) ~ext))
      |> Path.Set.of_list)
 
+module L = struct
   let file_deps_of_lib t (lib : Lib.t) ~ext =
     if Lib.is_local lib then
       Alias.stamp_file
@@ -30,3 +31,4 @@ let file_deps_with_exts t lib_exts =
 
   let file_deps t libs ~ext =
     List.rev_map libs ~f:(file_deps_of_lib t ~ext)
+end

src/lib_deps.mli

@@ -1,5 +1,7 @@
 open Stdune
 
+module L : sig
+
   (** [file_deps t libs ~ext] returns a list of path dependencies for all the
       files with extension [ext] of libraries [libs]. *)
   val file_deps : Super_context.t -> Lib.L.t -> ext:string -> Path.t list
@@ -8,6 +10,7 @@ val file_deps_with_exts
     :  Super_context.t
     -> (Lib.t * string) list
     -> Path.t list
+end
 
 (** Setup the alias that depends on all files with a given extension
     for a library *)

src/lib_rules.ml

@@ -273,7 +273,7 @@ module Gen (P : Install_rules.Params) = struct
         [ Hidden_deps h_files
         ; Arg_spec.of_result_map requires ~f:(fun libs ->
             S [ Lib.L.c_include_flags libs ~stdlib_dir:ctx.stdlib_dir
-              ; Hidden_deps (Lib_deps.file_deps sctx libs ~ext:".h")
+              ; Hidden_deps (Lib_deps.L.file_deps sctx libs ~ext:".h")
               ])
         ]
     in