[Teaching] Getting OCaml set up on a mac

[Greg Morrisett]

Thanks to Kenichi Asai, I’ve gotten this fixed.  The issue is that
the .elc files weren’t wiped out from the previous buggy version
of tuareg.  Deleting those fixed the problem.  

-Greg

> On Jan 26, 2015, at 10:31 AM, Yaron Minsky <yminsky at janestreet.com> wrote:
> 
> And the version of Tuareg is the one from opam?  Did you try
> Christophe's suggestion of getting the HEAD release?
> 
> y
> 
> On Mon, Jan 26, 2015 at 10:02 AM, Greg Morrisett <greg at eecs.harvard.edu> wrote:
>> One possible difference is that I’m using MacPorts instead of
>> Homebrew.  But I’m not sure why that would cause these problems.
>> I explicitly downloaded the latest (binary) versions of both
>> emacs and aquamacs.
>> 
>> -Greg
>> 
>>> On Jan 26, 2015, at 10:00 AM, Greg Morrisett <greg at eecs.harvard.edu> wrote:
>>> 
>>> The emacs version is 24.4.1.  The .emacs file is the one you sent
>>> me.  When I fire this up, font-lock-mode is enabled, but nothing
>>> is colorized when I load a .ml file.  If I explicitly font-lock-
>>> fontify-buffer, and then type anything, I get the error message:
>>> 
>>> Symbol’s function definition is void:  tuareg-syntax-propertize
>>> 
>>> I’m going to try the most recent head of tuareg to see if this
>>> fixes the problem.
>>> 
>>> (NB:  same behavior under latest Aquamacs.)
>>> 
>>> -Greg
>>> 
>>>> On Jan 23, 2015, at 8:54 PM, Yaron Minsky <yminsky at janestreet.com> wrote:
>>>> 
>>>> Hmm.  Really can't replicate the problem --- font-lock works fine for
>>>> me.  Greg, can you email out your full .emacs?  And double-check the
>>>> version of emacs your running?
>>>> 
>>>> y
>>>> 
>>>> On Fri, Jan 23, 2015 at 6:35 PM, Yaron Minsky <yminsky at janestreet.com> wrote:
>>>>> That's odd. I'll look at this this weekend.
>>>>> 
>>>>> y
>>>>> 
>>>>> On Jan 23, 2015 11:07 AM, "Greg Morrisett" <greg at eecs.harvard.edu> wrote:
>>>>>> 
>>>>>> Thanks.
>>>>>> 
>>>>>> Your dot-emacs and dot-merlin work (with tuareg-2.0.8 which
>>>>>> is what opam installs now.)
>>>>>> 
>>>>>> However, font lock mode doesn’t automatically trigger on either
>>>>>> emacs or aquamacs, in spite of the fact that I added:
>>>>>> 
>>>>>> (global-font-lock-mode t)
>>>>>> 
>>>>>> If I add a hook to try to explicitly turn on font-lock:
>>>>>> 
>>>>>> (add-hook 'tuareg-mode-hook 'font-lock-fontify-buffer t)
>>>>>> 
>>>>>> then I get the error:
>>>>>> 
>>>>>> Warning: Bug in tuareg-mode: it forgets to call `run-mode-hooks'
>>>>>> File mode specification error: (void-function tuareg-syntax-propertize)
>>>>>> 
>>>>>> -Greg
>>>>>> 
>>>>>>> On Jan 22, 2015, at 9:58 PM, Yaron Minsky <yminsky at janestreet.com>
>>>>>>> wrote:
>>>>>>> 
>>>>>>> In the meantime, I've attached a dot-emacs and dot-merlin files that I
>>>>>>> think work nicely on a mac.  The one thing you need to do is to add
>>>>>>> this line to your .profile file:
>>>>>>> 
>>>>>>> eval `opam config env`
>>>>>>> 
>>>>>>> The dot emacs depends on this being in place for figuring out where to
>>>>>>> find all the executables stashed in the .opam directory.
>>>>>>> 
>>>>>>> The pre-reqs for this to work is getting tuareg downloaded and in the
>>>>>>> proper path (right now, I assume ~/.elisp/tuareg-mode), and installing
>>>>>>> some opam packages:
>>>>>>> 
>>>>>>> opam install core async merlin utop ocp-indent
>>>>>>> 
>>>>>>> This should give you merlin, ocp-indent, tuareg, and utop support, all
>>>>>>> nicely integrated.  Note that the .merlin file needs to go in the
>>>>>>> directory where you're editing code (and really, in every directory
>>>>>>> where you're editing code.)  And the .merlin assumes that you're using
>>>>>>> ocamlbuild (or corebuild) and so are putting your build artifacts in
>>>>>>> _build.
>>>>>>> 
>>>>>>> I'm hoping this is helpful.
>>>>>>> 
>>>>>>> y
>>>>>>> 
>>>>>>> On Thu, Jan 22, 2015 at 8:42 PM, Yaron Minsky <yminsky at janestreet.com>
>>>>>>> wrote:
>>>>>>>> On Thu, Jan 22, 2015 at 8:25 PM, Louis Gesbert
>>>>>>>> <louis.gesbert at ocamlpro.com> wrote:
>>>>>>>>> Thanks for the feedback. It's probably still a bit rough at the moment
>>>>>>>>> but the config-updating engine is there, and polishing configuration itself
>>>>>>>>> from there should be straight-forward (and never-ending).
>>>>>>>> 
>>>>>>>> Indeed.  Now I think is the time to really focus on getting it
>>>>>>>> working, because this is the beginning of the semester, and so now is
>>>>>>>> the most valuable time to have something working cleanly.
>>>>>>>> 
>>>>>>>> It would be good to know what we have there now.  It seems like a
>>>>>>>> minimum should be:
>>>>>>>> 
>>>>>>>> - tuareg
>>>>>>>> - merlin
>>>>>>>> - ocp-indent
>>>>>>>> - utop
>>>>>>>> 
>>>>>>>> all read to go in emacs.  Getting vim and sublime text support would
>>>>>>>> be lovely too, but I think less critical.  What does user-setup
>>>>>>>> already support?
>>>>>>>> 
>>>>>>>>> The idea, with this and the "depext" package is to have a setup that
>>>>>>>>> can be limited to:
>>>>>>>>> 
>>>>>>>>> PACKAGES="user-setup merlin utop cohttp js_of_ocaml oasis
>>>>>>>>> ocp-indent ocp-index ssl core_extended async js_of_ocaml core_bench cohttp
>>>>>>>>> cryptokit menhir"
>>>>>>>>> opam init -a
>>>>>>>>> opam install depext
>>>>>>>>> opam depext $PACKAGES
>>>>>>>>> opam install $PACKAGES
>>>>>>>>> 
>>>>>>>>> and results in a ready-to-go environment. This is in particular
>>>>>>>>> targetted at VM setup, of course.
>>>>>>>> 
>>>>>>>> Interesting. Concretely, what would would depext do in this context?
>>>>>>>> I did a fresh install of a number of packages on my mac, and I didn't
>>>>>>>> need much else, but I may have already had the dependencies in place
>>>>>>>> via brew.
>>>>>>>> 
>>>>>>>> y
>>>>>>>> 
>>>>>>>>>> - Yaron Minsky, 22/01/2015 10:56 -
>>>>>>>>>> It installed cleanly for me, but it doesn't quite work.  I installed
>>>>>>>>>> user-setup, merlin, ocp-indent, tuareg, utop, core and async.  It all
>>>>>>>>>> went through, but when I open a .ml file, it shows up in lisp mode,
>>>>>>>>>> not tuareg.
>>>>>>>>> 
>>>>>>>>> Seems it doesn't handle the opam-installed tuareg package well at the
>>>>>>>>> moment, should be fixed in a moment.
>>>>>>>>> 
>>>>>>>>>> On Thu, Jan 22, 2015 at 10:54 AM, Greg Morrisett
>>>>>>>>>> <greg at eecs.harvard.edu> wrote:
>>>>>>>>>>> Okay, I just followed these steps:
>>>>>>>>>>>> 
>>>>>>>>>>>> opam update
>>>>>>>>>>>> opam install user-setup
>>>>>>>>>>> 
>>>>>>>>>>> and it seems to be hanging.  Is there a log file or
>>>>>>>>>>> other config information that I can send you to help
>>>>>>>>>>> figure this out?
>>>>>>>>> 
>>>>>>>>> Thanks. I just managed to reproduce on OPAM 1.1 and hope to fix it
>>>>>>>>> quickly.
>>>>>>>> 
>>>>>>>> Greg, it's also probably a good idea to encourage your students to
>>>>>>>> upgrade to the latest opam if they're on a mac.  Homebrew is pretty
>>>>>>>> lightweight, and has opam 1.2.0.
>>>>>>>> 
>>>>>>>> y
>>>>>>> <dot-emacs><dot-merlin>
>>>>>> 
>>>>> 
>>> 
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