ocaml-settings.el

(defvar ocaml-packages '(tuareg merlin ocp-indent))

;; Is OPAM installed?
(if (equal "" (shell-command-to-string "which opam"))
    (user-error "WARNING: OPAM is not installed, OCaml packages are not supported!")
  ;; Else
  (progn
    (setq opam-share (substring (shell-command-to-string "opam config var share 2> /dev/null") 0 -1))
    (add-to-list 'load-path (concat opam-share "/emacs/site-lisp"))
    ;; Load and install packages if needed...
    (dolist (p ocaml-packages)
      (unless (ignore-errors (require p))
        (let ((command (concat "opam install " (symbol-name p) " 1>/dev/null")))
          (message (concat "Executing: " command))
          (shell-command command))))
    ;; Settings
    (add-hook 'tuareg-mode-hook 'merlin-mode)))