Re: [O] Patch for asynchronous export of ocaml code

[Eric Schulte]

This looks great, please apply this patch.

Thanks,

Alan Schmitt <address@hidden> writes:

> Hello,
>
> It is not currently possible to asynchronously export the results of the
> evaluation an ocaml babel block because the evaluation needs to start a 
> toplevel
> and thus asks the user what program to run. This of course blocks the
> asynchronous export.
>
> The attached patch adds a custom variable to specify the name of the command
> to run, and directly calls the tuareg function that starts the toplevel given
> the command.
>
> For some context, here is the code that starts the caml session.
>
> #+BEGIN_SRC emacs-lisp
> (defvar tuareg-interactive-buffer-name)
> (defun org-babel-prep-session:ocaml (session params)
>   "Prepare SESSION according to the header arguments in PARAMS."
>   (require 'tuareg)
>   (let ((tuareg-interactive-buffer-name (if (and (not (string= session 
> "none"))
>                                                  (not (string= session 
> "default"))
>                                                  (stringp session))
>                                             session
>                                           tuareg-interactive-buffer-name)))
>     (save-window-excursion
>       (if (fboundp 'tuareg-run-caml) (tuareg-run-caml) (tuareg-run-ocaml))
>       (get-buffer tuareg-interactive-buffer-name))))
> #+END_SRC
>
> And this is the code from tuareg that is run.
>
> #+BEGIN_SRC emacs-lisp
> ;;;###autoload
> (defun tuareg-run-ocaml ()
>   "Run an OCaml toplevel process. I/O via buffer `*ocaml-toplevel*'."
>   (interactive)
>   (tuareg-run-process-if-needed)
>   (display-buffer tuareg-interactive-buffer-name))
>
> (defun tuareg-run-process-if-needed (&optional cmd)
>   "Run an OCaml toplevel process if needed, with an optional command name.
> I/O via buffer `*ocaml-toplevel*'."
>   (if cmd
>       (setq tuareg-interactive-program cmd)
>     (unless (comint-check-proc tuareg-interactive-buffer-name)
>       (setq tuareg-interactive-program
>             (read-shell-command "OCaml toplevel to run: "
>                                 tuareg-interactive-program))))
>   (unless (comint-check-proc tuareg-interactive-buffer-name)
>     (let ((cmdlist (tuareg-args-to-list tuareg-interactive-program))
>           (process-connection-type nil))
>       (set-buffer (apply (function make-comint) "ocaml-toplevel"
>                          (car cmdlist) nil (cdr cmdlist)))
>       (tuareg-interactive-mode)
>       (sleep-for 1))))
> #+END_SRC
>
> With this patch (and setting `org-confirm-babel-evaluate' to nil), I'm able to
> export documents requiring the evaluation of caml code asynchronously.
>
> Alan
>
>

-- 
Eric Schulte
http://cs.unm.edu/~eschulte