refactor(ocaml): use apheleia instead of ocamlformat.el

The ocamlformat.el package reinvents what Apheleia is already doing, but
Apheleia's default definition for ocamlformat is a little simplistic.
This merges the efforts of both and allows us to cut down on an unneeded
dependency.

modules/lang/ocaml/config.el

@@ -13,6 +13,13 @@
 
 
 (after! tuareg
+  (set-formatter! 'ocamlformat
+    '("ocamlformat" "-" "--name" filepath "--enable-outside-detected-project"
+      (if (locate-dominating-file default-directory ".ocamlformat")
+          (pcase (apheleia-formatters-extension-p "eliom" "eliomi")
+            ("eliom"  '("--impl"))
+            ("eliomi" '("--intf")))
+        '("--profile=ocamlformat"))))
   ;; tuareg-mode has the prettify symbols itself
   (set-ligatures! 'tuareg-mode :alist
     (append tuareg-prettify-symbols-basic-alist
@@ -101,23 +108,6 @@
       (ocp-setup-indent))))
 
 
-(use-package! ocamlformat
-  :when (modulep! :editor format)
-  :commands ocamlformat
-  :hook (tuareg-mode-local-vars . +ocaml-init-ocamlformat-h)
-  :config
-  ;; TODO Fix region-based formatting support
-  (defun +ocaml-init-ocamlformat-h ()
-    (setq-local +format-with 'ocp-indent)
-    (when (and (executable-find "ocamlformat")
-               (locate-dominating-file default-directory ".ocamlformat"))
-      (when buffer-file-name
-        (let ((ext (file-name-extension buffer-file-name t)))
-          (cond ((equal ext ".eliom")
-                 (setq-local ocamlformat-file-kind 'implementation))
-                ((equal ext ".eliomi")
-                 (setq-local ocamlformat-file-kind 'interface)))))
-      (setq-local +format-with 'ocamlformat))))
 
 (use-package! opam-switch-mode
   :hook (tuareg-mode-local-vars . +ocaml-init-opam-switch-h)

modules/lang/ocaml/packages.el

@@ -18,11 +18,6 @@
 (when (modulep! :tools eval)
   (package! utop :pin "384b3098c8c4a2e26b87167053952b753aa8a63a"))
 
-(when (modulep! :editor format)
-  (package! ocamlformat
-    :recipe (:host github :repo "ocaml-ppx/ocamlformat" :files ("emacs/*.el"))
-    :pin "c43f89bc0ebd536009151814214320bdf3988c50"))
-
 (package! dune
   :recipe (:host github :repo "ocaml/dune" :files ("editor-integration/emacs/*.el"))
   :pin "aac3d84f1d5abdf276d72be3dccac23bf99b3c7c")