[Nix-dev] Packaging Torch

[Sergey Mironov]

Hello. After recent segfault I have re-designed Nix expression
building Torch the machine learning framework. New build2.nix doesn't
use all-in-one install script from the upstream, but builds one
package after another in form of separate derivations. This way turns
out to be successful, so we have a Torch which passes the segfault
test from the previous letter.

As a side effect, the expression contains function dealing with
luarocks (they think every language should have its own package
manager))). It would be nice to integrate it into nixpkgs. AFAIK
top-level/lua-packages doesn't really support luarocks builds at the
moment.

To check it out:

$ git clone https://github.com/grwlf/torch-distro --recursive
$ cd torch-distro
$ nix-build build2.nix -A trepl
$ ./result/bin/th

There are less than a half of the total number of packages. Still many
things to do..

Regards,
Sergey



2016-02-24 16:25 GMT+03:00 Sergey Mironov <grrwlf at gmail.com>:
> Unfortunately, the Torch build from
> https://github.com/grwlf/torch-distro has a Segfault problem.
>
> $ th
> th> N = 5
>                                                                       [0.0000s]
> th> A = torch.rand(N, N)
>                                                                       [0.0002s]
> th> A = A*A:t()
> Segmentation fault (core dumped)
>
> Core dump shows that it is the luajit who cause the fault. The source
> of a problem is still a mystery.
> Regards,
>
>
> 2016-02-19 16:27 GMT+03:00 Sergey Mironov <grrwlf at gmail.com>:
>> Hi again. I come to a runnable version of Torch package. Not sure it
>> works correctly, but I can see its colored command prompt.
>>
>>     $ git clone https://github.com/grwlf/torch-distro --recursive
>>     $ cd torch-distro
>>     $ nix-build build.nix
>>
>> Install.log says that some optional packages (namely, iTorch) have
>> failed to build. Also, the package has many Lua dependencies
>> incorporated, one have to switch them to lua-packages.nix somehow.
>>
>> Regards,
>> Sergey
>>
>>
>> 2016-02-17 18:11 GMT+03:00 Sergey Mironov <grrwlf at gmail.com>:
>>> Thanks!
>>>
>>> I'll report the progress here :)
>>>
>>> 2016-02-16 22:04 GMT+03:00 Jonn Mostovoy <jm at memorici.de>:
>>>> I just want to point out that I wanted to build a neural network engine in
>>>> lua with some auxiliary dependencies and faced unpleasant problems with 'cc'
>>>> binary pointing not where the author's cmake file expected to point.
>>>> Didn't research, much, but if anything, I'd be interested to contribute to
>>>> little things when it comes to lua packaging.
>>>>
>>>> On Feb 16, 2016 7:06 PM, "William Casarin" <bill at casarin.me> wrote:
>>>>>
>>>>> On Tue, Feb 16, 2016 at 5:30 AM, Sergey Mironov <grrwlf at gmail.com> wrote:
>>>>> > Hi, List. I'd like to use Torch (http://torch.ch/) on NixOS and it
>>>>> > looks like I have to package it first.
>>>>>
>>>>> I was looking into this awhile back. On the lua side, some pre-reqs
>>>>> would make this a lot easier:
>>>>>
>>>>>   * luarocks2nix (https://luarocks.org/manifest.zip)
>>>>>   * packaging these https://github.com/torch/rocks
>>>>>
>>>>> This would be useful for things outside Torch as well, but looks like
>>>>> a lot of work...
>>>>> _______________________________________________
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