[Teaching] Getting OCaml set up on a mac

Greg Morrisett greg at eecs.harvard.edu
Mon Jan 26 15:00:07 GMT 2015

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.)  


> 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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