[Teaching] Getting opam's user-setup working cleanly

[Yaron Minsky]

Hmm.  I'm still not able to get user-setup to work cleanly on my mac,
though depext does install now, and I think correctly determines that
there are no packages it needs to install.

But here are the messages I get from emacs:

Loading paren...done
Loading tuareg-site-file...done
For information about GNU Emacs and the GNU system, type C-h C-a.
Making completion list...
Starting merlin instance: default (binary=ocamlmerlin).
File mode specification error: (file-error "Searching for program" "no
such file or directory" "ocamlmerlin")

So it can't seem to find merlin.

I'm also a little troubled by the hard-coding of paths in the .emacs.
Once nice thing about the dot-emacs file I shared with Greg is that it
auto-updates where it points on every opam switch, without even
needing to restart emacs, I believe.  It would be nice to have this
for merlin, though I admit perhaps not with tuareg.

I tend to think that until we get this sorted, teachers should use
manually put together dot-emacs files like the ones I emailed out.

y

On Fri, Jan 23, 2015 at 12:39 AM, Anil Madhavapeddy <anil at recoil.org> wrote:
> Fixed; there was a minor typo in the `opam` file for the package;
> https://github.com/ocaml/opam-repository/pull/3441
>
> -a
>
>> On 23 Jan 2015, at 04:33, Yaron Minsky <yminsky at janestreet.com> wrote:
>>
>> Also, I can't seem to install depext, but the reason doesn't make sense:
>>
>> Kalessin:~ yminsky2$ opam install depext
>> [ERROR] depext is not available because your system doesn't comply
>> with opam-version >= "4.02".
>> Kalessin:~ yminsky2$ opam --version
>> 1.2.0
>>
>> I'm running the latest opam available from homebrew.
>>
>> y
>>
>> On Thu, Jan 22, 2015 at 10:21 PM, Yaron Minsky <yminsky at janestreet.com> wrote:
>>> Does depext do anything on a mac?  On redhat? Or is it Debian only?
>>>
>>> On Jan 22, 2015 10:03 PM, "Louis Gesbert" <louis.gesbert at ocamlpro.com>
>>> wrote:
>>>>
>>>> Just released 0.2 which should fix both issues (opam tuareg mode and
>>>> stalling with vim)
>>>>
>>>>> 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?
>>>>
>>>> Needs more testing, but we do have those ; vim support also, but it's more
>>>> lightly tested.
>>>> I didn't figure how to configure Sublime yet.
>>>>
>>>>> 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.
>>>>
>>>> Not sure, but you can use `opam depext -l` to simply show the currently
>>>> required external packages.
>>>>
>>>> The one that bites most often on .deb distributions is the lack of m4,
>>>> which is required by ocamlfind. It gets much more complicated as soon as you
>>>> want to install e.g. gtk stuff, of course (ocaml-top...).
>>>>
>>>> Best,
>>>> Louis
>>
>