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Setup Emacs for OCaml Development
Install Necessary Packages with opam
Usually, we have a venv per project. We first use opam to install necessary packages:
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| opam install merlin ocp-indent ocamlformat dune ocaml-lsp
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where merlin is LSP, ocp-indent handles auto indentation, ocamlformat for formatting, dune for project management.
Setting Up for OCaml
Let’s put OCaml related configs in lisp/ocaml.el and load it in init.el with (require 'ocaml). Of course, you should first setup lsp-mode.
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| (use-package caml
:ensure t
:mode (("\\.ml\\'" . caml-mode)
("\\.mli\\'" . caml-mode)
("\\.mll\\'" . caml-mode)
("\\.mly\\'" . caml-mode))
:hook (caml-mode . lsp))
(use-package dune
:ensure t
:mode (("dune\\'" . dune-mode)
("dune-project\\'" . dune-mode)))
(use-package merlin
:ensure t
:hook (caml-mode . merlin-mode)
:custom
(merlin-error-after-save nil))
(use-package merlin-eldoc
:ensure t
:hook (caml-mode . merlin-eldoc-setup))
(use-package ocp-indent
:ensure t
:commands ocp-indent-buffer-local
:hook
(caml-mode . ocp-setup-indent)
)
(use-package ocamlformat
:ensure t)
(provide 'ocaml)
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where we simply setup each components.