Re: [Caml-list] How can I use a library in a toplevel created by js_of_ocaml?

[Kenichi Asai <asai@is.ocha.ac.jp>]

Thank you for the e-mail.  It goes great.  Going one step further, can
I do the same if I install fac as an opam library?  Suppose I packaged
fac.ml as a library called myFac and installed fac.cma and fac.cmi via
opam.  Using:

(action (run jsoo_listunits -o %{targets} stdlib myFac))

I could compile it but I got the "Unbound module Fac" error when I
open index.html.  Is listing myFac in the above line not enough?

As a related question, is there a document I can study that describes:
- what jsoo_listunits does, and
- what the --export option (and other options) of js_of_ocaml does?

-- 
Kenichi Asai


On Tue, May 28, 2019 at 08:41:01AM +0800,
 hugo wrote:

> You need to tell js_of_ocaml the list of cmi that you want to export.
> [jsoo_listunits] can compute the list of cmi from a findlib library.
> Because fac is not installed, you'll need to be explicit.
> There might be some better wait to integrate with dune but the following
> should change should do what you want.
> 
> (rule
>  (targets export.txt)
>  (deps eval.bc fac/fac.cma)
>  (action (run jsoo_listunits -o %{targets} stdlib fac/.fac.objs/byte/fac.cmi)))
> 
> H
> 
> 
> On Sun, May 26, 2019 at 2:27 PM Kenichi Asai <asai@is.ocha.ac.jp> wrote:
> 
> > I want to create a web page where I can execute an OCaml expression
> > that mentions a prebuilt user-defined library.  I find the following
> > example in the js_of_ocaml/toplevel repository:
> >
> > https://github.com/ocsigen/js_of_ocaml/tree/master/toplevel/examples/eval
> >
> > Can I extend this example so that the toplevel is compiled with a
> > user-defined library?  The attached program contains the following
> > where the first three files are copied from the example in the
> > js_of_ocaml/toplevel repository.
> >
> > toplevel/ -- dune
> >           -- eval.ml
> >           -- index.html
> >           -- fac/ -- dune
> >                   -- fac.ml
> >
> > I intend that fac.ml is compiled as a library and I want to use it in
> > the toplevel.  I added "fac" in the libraries stanza of the toplevel
> > dune file (as in the attached file):
> >
> > (executables
> >   (names eval)
> >   (libraries
> >     fac
> >     js_of_ocaml-compiler
> >     js_of_ocaml-toplevel)
> >   (link_flags (:standard -linkall))
> >   (preprocess (pps js_of_ocaml-ppx)))
> >
> > Naturally, fac.ml is compiled and I can use it in the eval.ml, but it
> > is not visible from the toplevel.  I included the following part in
> > the index.html (as in the attached file):
> >
> > <script type="text/ocaml" stdout="script3" stderr="script3">
> >   Fac.go 3;;
> > </script>
> > <div id="script3"> </div>
> >
> > but the output says:
> >
> > File "/dev/fake_stdin", line 2, characters 6-12:
> > Error: Unbound module Fac
> >
> > Thank you in advance.
> >
> > --
> > Kenichi Asai