Missing loc

CHANGES.md

@@ -30,6 +30,9 @@ next
 - Fix placeholders in `dune subst` documentation (#1090, @emillon, thanks
   @trefis for the bug report)
 
+- Add locations to errors when a missing binary in PATH comes from a dune file
+  (#1096, fixes #1095, @rgrinberg)
+
 1.0.1 (19/07/2018)
 ------------------
 

src/action.ml

@@ -1,6 +1,8 @@
 open Import
 open Sexp.Of_sexp
 
+let ignore_loc k ~loc:_ = k
+
 module Outputs = struct
   include Action_intf.Outputs
 
@@ -257,10 +259,11 @@ module Prog = struct
       { context : string
       ; program : string
       ; hint    : string option
+      ; loc     : Loc.t option
       }
 
-    let raise { context ; program ; hint } =
-      Utils.program_not_found ?hint ~context program
+    let raise { context ; program ; hint ; loc } =
+      Utils.program_not_found ?hint ~loc ~context program
   end
 
   type t = (Path.t, Not_found.t) result
@@ -320,13 +323,13 @@ module Unresolved = struct
   module Program = struct
     type t =
       | This   of Path.t
-      | Search of string
+      | Search of Loc.t option * string
 
-    let of_string ~dir s =
+    let of_string ~dir ~loc s =
       if String.contains s '/' then
         This (Path.relative dir s)
       else
-        Search s
+        Search (loc, s)
   end
 
   module type Uast = Action_intf.Ast
@@ -345,18 +348,20 @@ module Unresolved = struct
       ~f_string:(fun ~dir:_ x -> x)
       ~f_program:(fun ~dir:_ -> function
         | This p -> Ok p
-        | Search s -> Ok (f s))
+        | Search (loc, s) -> Ok (f loc s))
 end
 
-let prog_and_args_of_values p ~dir =
+let prog_and_args_of_values ~loc p ~dir =
   match p with
-  | [] -> (Unresolved.Program.Search "", [])
+  | [] -> (Unresolved.Program.Search (loc, ""), [])
   | Value.Dir p :: _ ->
     die "%s is a directory and cannot be used as an executable"
       (Path.to_string_maybe_quoted p)
   | Value.Path p :: xs -> (This p, Value.L.to_strings ~dir xs)
   | String s :: xs ->
-    (Unresolved.Program.of_string ~dir s, Value.L.to_strings ~dir xs)
+    ( Unresolved.Program.of_string ~loc ~dir s
+    , Value.L.to_strings ~dir xs
+    )
 
 module Unexpanded = struct
   module type Uast = Action_intf.Ast
@@ -398,17 +403,19 @@ module Unexpanded = struct
     module E = struct
       let expand ~dir ~mode ~f ~l ~r =
         Either.map ~l
-          ~r:(fun s -> r (String_with_vars.expand s ~dir ~f ~mode) ~dir)
+          ~r:(fun s ->
+            r ~loc:(Some (String_with_vars.loc s))
+              (String_with_vars.expand s ~dir ~f ~mode) ~dir)
 
       let string =
         expand ~mode:Single
           ~l:(fun x -> x)
-          ~r:Value.to_string
+          ~r:(ignore_loc Value.to_string)
 
       let strings =
         expand ~mode:Many
           ~l:(fun x -> [x])
-          ~r:Value.L.to_strings
+          ~r:(ignore_loc Value.L.to_strings)
 
       let path e =
         let error_loc =
@@ -417,7 +424,7 @@ module Unexpanded = struct
           | Right r -> Some (String_with_vars.loc r) in
         expand ~mode:Single
           ~l:(fun x -> x)
-          ~r:Value.(to_path ?error_loc) e
+          ~r:(ignore_loc (Value.(to_path ?error_loc))) e
 
       let prog_and_args =
         expand ~mode:Many
@@ -488,15 +495,17 @@ module Unexpanded = struct
   module E = struct
     let expand ~dir ~mode ~f ~map x =
       match String_with_vars.partial_expand ~mode ~dir ~f x with
-      | Expanded e -> Left (map e ~dir)
+      | Expanded e ->
+        let loc = Some (String_with_vars.loc x) in
+        Left (map ~loc e ~dir)
       | Unexpanded x -> Right x
 
-    let string = expand ~mode:Single ~map:Value.to_string
-    let strings = expand ~mode:Many ~map:Value.L.to_strings
-    let cat_strings = expand ~mode:Many ~map:Value.L.concat
+    let string = expand ~mode:Single ~map:(ignore_loc Value.to_string)
+    let strings = expand ~mode:Many ~map:(ignore_loc Value.L.to_strings)
+    let cat_strings = expand ~mode:Many ~map:(ignore_loc Value.L.concat)
     let path x =
-      let error_loc = String_with_vars.loc x in
-      expand ~mode:Single ~map:(Value.to_path ~error_loc) x
+      expand ~mode:Single ~map:(fun ~loc v ~dir ->
+        Value.to_path ?error_loc:loc v ~dir) x
     let prog_and_args = expand ~mode:Many ~map:prog_and_args_of_values
   end
 

src/action.mli

@@ -11,6 +11,7 @@ module Prog : sig
       { context : string
       ; program : string
       ; hint    : string option
+      ; loc     : Loc.t option
       }
 
     val raise : t -> _
@@ -54,15 +55,15 @@ module Unresolved : sig
   module Program : sig
     type t =
       | This   of Path.t
-      | Search of string
+      | Search of Loc.t option * string
   end
 
   include Action_intf.Ast
     with type program := Program.t
     with type path    := Path.t
     with type string  := string
 
-  val resolve : t -> f:(string -> Path.t) -> action
+  val resolve : t -> f:(Loc.t option -> string -> Path.t) -> action
 end with type action := t
 
 module Unexpanded : sig

src/artifacts.ml

@@ -51,7 +51,7 @@ let create (context : Context.t) ~public_libs l ~f =
   ; public_libs
   }
 
-let binary t ?hint name =
+let binary t ?hint ~loc name =
   if not (Filename.is_relative name) then
     Ok (Path.of_filename_relative_to_initial_cwd name)
   else
@@ -66,6 +66,7 @@ let binary t ?hint name =
             program = name
           ; hint
           ; context = t.context.Context.name
+          ; loc
           }
 
 let file_of_lib t ~loc ~lib ~file =

src/artifacts.mli

@@ -16,6 +16,7 @@ val create
 val binary
   :  t
   -> ?hint:string
+  -> loc:Loc.t option
   -> string
   -> Action.Prog.t
 

src/build_system.ml

@@ -354,6 +354,7 @@ module Dir_status = struct
     ; action : (unit, Action.t) Build.t
     ; locks  : Path.t list
     ; context : Context.t
+    ; loc : Loc.t option
     }
 
 
@@ -684,23 +685,23 @@ let remove_old_artifacts t ~dir ~subdirs_to_keep =
           if not (Path.Table.mem t.files path) then Path.unlink path)
 
 let no_rule_found =
-  let fail fn =
-    die "No rule found for %s" (Utils.describe_target fn)
+  let fail fn ~loc =
+    Loc.fail_opt loc "No rule found for %s" (Utils.describe_target fn)
   in
-  fun t fn ->
+  fun t ~loc fn ->
     match Utils.analyse_target fn with
-    | Other _ -> fail fn
+    | Other _ -> fail fn ~loc
     | Regular (ctx, _) ->
       if String.Map.mem t.contexts ctx then
-        fail fn
+        fail fn ~loc
       else
         die "Trying to build %s but build context %s doesn't exist.%s"
           (Path.to_string_maybe_quoted fn)
           ctx
           (hint ctx (String.Map.keys t.contexts))
     | Alias (ctx, fn') ->
       if String.Map.mem t.contexts ctx then
-        fail fn
+        fail fn ~loc
       else
         let fn = Path.append (Path.relative Path.build_dir ctx) fn' in
         die "Trying to build alias %s but build context %s doesn't exist.%s"
@@ -729,18 +730,18 @@ let rec compile_rule t ?(copy_source=false) pre_rule =
 
   let eval_rule () =
     t.hook Rule_started;
-    wait_for_deps t (Lazy.force static_deps).rule_deps
+    wait_for_deps t (Lazy.force static_deps).rule_deps ~loc
     >>| fun () ->
     Build_exec.exec t build ()
   in
   let exec_rule (rule_evaluation : Exec_status.rule_evaluation) =
     let static_deps = (Lazy.force static_deps).action_deps in
     Fiber.fork_and_join_unit
       (fun () ->
-         wait_for_deps t static_deps)
+         wait_for_deps ~loc t static_deps)
       (fun () ->
          Fiber.Future.wait rule_evaluation >>= fun (action, dyn_deps) ->
-         wait_for_deps t (Path.Set.diff dyn_deps static_deps)
+         wait_for_deps ~loc t (Path.Set.diff dyn_deps static_deps)
          >>| fun () ->
          (action, dyn_deps))
     >>= fun (action, dyn_deps) ->
@@ -949,13 +950,13 @@ and load_dir_step2_exn t ~dir ~collector ~lazy_generators =
         let rules, deps =
           List.fold_left actions ~init:(rules, deps)
             ~f:(fun (rules, deps)
-                 { Dir_status. stamp; action; locks ; context } ->
+                 { Dir_status. stamp; action; locks ; context ; loc } ->
                  let path =
                    Path.extend_basename base_path
                      ~suffix:("-" ^ Digest.to_hex stamp)
                  in
                  let rule =
-                   Pre_rule.make ~locks ~context:(Some context)
+                   Pre_rule.make ~locks ~context:(Some context) ?loc
                      (Build.progn [ action; Build.create_file path ])
                  in
                  (rule :: rules, Path.Set.add deps path))
@@ -1107,7 +1108,7 @@ The following targets are not:
 
   targets
 
-and wait_for_file t fn =
+and wait_for_file t ~loc fn =
   match Path.Table.find t.files fn with
   | Some file -> wait_for_file_found fn file
   | None ->
@@ -1116,7 +1117,7 @@ and wait_for_file t fn =
       load_dir t ~dir;
       match Path.Table.find t.files fn with
       | Some file -> wait_for_file_found fn file
-      | None -> no_rule_found t fn
+      | None -> no_rule_found t ~loc fn
     end else if Path.exists fn then
       Fiber.return ()
     else
@@ -1146,8 +1147,8 @@ and wait_for_file_found fn (File_spec.T file) =
                 };
       Fiber.Future.wait rule_execution)
 
-and wait_for_deps t deps =
-  Fiber.parallel_iter (Path.Set.to_list deps) ~f:(wait_for_file t)
+and wait_for_deps ~loc t deps =
+  Fiber.parallel_iter (Path.Set.to_list deps) ~f:(wait_for_file ~loc t)
 
 let stamp_file_for_files_of t ~dir ~ext =
   let files_of_dir =
@@ -1260,7 +1261,7 @@ let eval_request t ~request ~process_target =
   Fiber.fork_and_join_unit
     (fun () -> process_targets static_deps)
     (fun () ->
-       wait_for_deps t rule_deps
+       wait_for_deps t ~loc:None rule_deps
        >>= fun () ->
        let result, dyn_deps = Build_exec.exec t request () in
        process_targets (Path.Set.diff dyn_deps static_deps)
@@ -1285,7 +1286,7 @@ let update_universe t =
 let do_build t ~request =
   entry_point t ~f:(fun () ->
     update_universe t;
-    eval_request t ~request ~process_target:(wait_for_file t))
+    eval_request t ~request ~process_target:(wait_for_file ~loc:None t))
 
 module Ir_set = Set.Make(Internal_rule)
 
@@ -1616,12 +1617,13 @@ module Alias = struct
         Build.fanout def.dyn_deps build >>^ fun (a, b) ->
         Path.Set.union a b
 
-  let add_action build_system t ~context ?(locks=[]) ~stamp action =
+  let add_action build_system t ~context ~loc ?(locks=[]) ~stamp action =
     let def = get_alias_def build_system t in
     def.actions <- { stamp = Digest.string (Sexp.to_string ~syntax:Dune stamp)
                    ; action
                    ; locks
                    ; context
+                   ; loc
                    } :: def.actions
 end
 

src/build_system.mli

@@ -171,6 +171,7 @@ module Alias : sig
     :  build_system
     -> t
     -> context:Context.t
+    -> loc:Loc.t option
     -> ?locks:Path.t list
     -> stamp:Sexp.t
     -> (unit, Action.t) Build.t

src/context.ml

@@ -146,7 +146,7 @@ let create ~(kind : Kind.t) ~path ~env ~env_nodes ~name ~merlin ~targets
      Hashtbl.add opam_var_cache "root" root
    | Default -> ());
   let prog_not_found_in_path prog =
-    Utils.program_not_found prog ~context:name
+    Utils.program_not_found prog ~context:name ~loc:None
   in
   let which_cache = Hashtbl.create 128 in
   let which x = which ~cache:which_cache ~path x in
@@ -424,7 +424,7 @@ let default ?(merlin=true) ~env_nodes ~env ~targets () =
 let create_for_opam ?root ~env ~env_nodes ~targets ~profile ~switch ~name
       ?(merlin=false) () =
   match Bin.opam with
-  | None -> Utils.program_not_found "opam"
+  | None -> Utils.program_not_found "opam" ~loc:None
   | Some fn ->
     (match root with
      | Some root -> Fiber.return root

src/gen_rules.ml

@@ -133,7 +133,7 @@ module Gen(P : Install_rules.Params) = struct
          (* We have to execute the rule in the library directory as
             the .o is produced in the current directory *)
          ~dir:(Path.parent_exn src)
-         (SC.resolve_program sctx ctx.c_compiler)
+         (SC.resolve_program ~loc:None sctx ctx.c_compiler)
          ([ S [A "-I"; Path ctx.stdlib_dir]
           ; As (SC.cxx_flags sctx)
           ; includes
@@ -608,6 +608,7 @@ module Gen(P : Install_rules.Params) = struct
         ; deps = t.deps
         ; action = None
         ; enabled_if = t.enabled_if
+        ; loc
         } in
       match test_kind (loc, s) with
       | `Regular ->

src/inline_tests.ml

@@ -258,6 +258,7 @@ include Sub_system.Register_end_point(
       in
 
       SC.add_alias_action sctx
+        ~loc:(Some info.loc)
         (Build_system.Alias.runtest ~dir)
         ~stamp:(List [ Sexp.unsafe_atom_of_string "ppx-runner"
                      ; Quoted_string name

src/jbuild.ml

@@ -1558,6 +1558,7 @@ module Alias_conf = struct
     ; locks   : String_with_vars.t list
     ; package : Package.t option
     ; enabled_if : String_with_vars.t Blang.t option
+    ; loc : Loc.t
     }
 
   let alias_name =
@@ -1570,6 +1571,7 @@ module Alias_conf = struct
   let t =
     record
       (let%map name = field "name" alias_name
+       and loc = loc
        and package = field_o "package" Pkg.t
        and action = field_o "action" (located Action.Unexpanded.t)
        and locks = field "locks" (list String_with_vars.t) ~default:[]
@@ -1582,6 +1584,7 @@ module Alias_conf = struct
        ; package
        ; locks
        ; enabled_if
+       ; loc
        })
 end