Fix local_binaries to be called on the correct dir

Previously, it was caused on the associated dir but that was worked by accident.

Signed-off-by: Rudi Grinberg <[email protected]>

src/gen_rules.ml

@@ -199,7 +199,7 @@ module Gen(P : Install_rules.Params) = struct
        begin match List.last comps with
        | Some ".bin" ->
          let src_dir = Path.parent_exn dir in
-         Super_context.local_binaries sctx ~dir
+         Super_context.local_binaries sctx ~dir:src_dir
          |> List.iter ~f:(fun t ->
            let src = File_bindings.src_path t ~dir:src_dir in
            let dst = File_bindings.dst_path t ~dir in

src/super_context.mli

@@ -53,8 +53,8 @@ val ocaml_flags
   -> Buildable.t
   -> Ocaml_flags.t
 
-(** Binaries that are symlinked in local .bin directories. [dir]
-    should point to such a [.bin] directory, such as [foo/bar/.bin]. *)
+(** Binaries that are symlinked in the associated .bin directory of [dir]. This
+    associated directory is [Path.relative dir ".bin"] *)
 val local_binaries : t -> dir:Path.t -> string File_bindings.t
 
 (** Dump a directory environment in a readable form *)

test/blackbox-tests/test-cases/env-bins/run.t

@@ -1,30 +1,23 @@
 Basic test that we can use private binaries as public ones
   $ dune build --root private-bin-import
   Entering directory 'private-bin-import'
-  File "using-priv/dune", line 7, characters 0-79:
-   7 | (alias
-   8 |  (name runtest)
-   9 |  (action
-  10 |   (progn
-  11 |    (run priv)
-  12 |    (run priv-renamed))))
-  Error: No rule found for using-priv/.bin/priv
-  File "using-priv/dune", line 7, characters 0-79:
-   7 | (alias
-   8 |  (name runtest)
-   9 |  (action
-  10 |   (progn
-  11 |    (run priv)
-  12 |    (run priv-renamed))))
-  Error: No rule found for using-priv/.bin/priv-renamed
-  [1]
+          priv alias using-priv/runtest
+  Executing priv as priv
+  PATH:
+  	_build/default/test/blackbox-tests/test-cases/env-bins/private-bin-import/_build/default/using-priv/.bin
+  	_build/default/test/blackbox-tests/test-cases/env-bins/private-bin-import/_build/install/default/bin
+  	_build/install/default/bin
+  priv-renamed alias using-priv/runtest
+  Executing priv as priv-renamed
+  PATH:
+  	_build/default/test/blackbox-tests/test-cases/env-bins/private-bin-import/_build/default/using-priv/.bin
+  	_build/default/test/blackbox-tests/test-cases/env-bins/private-bin-import/_build/install/default/bin
+  	_build/install/default/bin
 
 Override public binary in env
   $ dune build --root override-bins
   Entering directory 'override-bins'
-  File "test/dune", line 5, characters 0-43:
-  5 | (alias
-  6 |  (name runtest)
-  7 |  (action (run foo)))
-  Error: No rule found for test/.bin/foo
-  [1]
+           foo alias test/runtest
+  private binary
+           foo alias default
+  public binary