[Teaching] Getting OCaml set up on a mac

Mon Jan 26 15:02:07 GMT 2015

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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