[Nix-dev] Terminfo issues with haskell 'vty' package & nix-shell

[Michael Jones]

Hi,

Thanks for the additional info. If I correctly set TERMINFO to my ubuntu
terminfo folder (/lib/terminfo) or if I install rxvt-unicode via nix and
use that as it properly references it's own terminfo information. Though if
I try to use the nix rxvt-unicode I get the following fontconfig errors:

Fontconfig error: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 70:
non-double matrix element
Fontconfig error: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 70:
non-double matrix element
Fontconfig warning: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line
78: saw unknown, expected number

Which from some googling suggests that the fontconfig library being used by
nix my be a little old. The nix file for it does reference 2.10.2:


https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/libraries/fontconfig/default.nix#L4

Which is 2 years old at this point:

    http://cgit.freedesktop.org/fontconfig/

I don't know what the results of updating it might be or how to go about
testing it locally. If anyone can point me at an effective guide for that
I'd be happy to try.

Thanks again for all the help,
Michael

On Fri, Nov 14, 2014 at 10:02 AM, Kirill Elagin <kirelagin at gmail.com> wrote:

> Hm, by the way `TERMINFO` gets set by urxvt itself, so that’s probably not
> what causes the problem.
>
>
> On Fri Nov 14 2014 at 13:59:05 Kirill Elagin <kirelagin at gmail.com> wrote:
>
>> On Thu Nov 13 2014 at 20:20:53 Michael Jones <m.pricejones at gmail.com>
>> wrote:
>>
>>> Hi,
>>>
>>> I hope this is the right list. I'm very new to nix and trying to get a
>>> set up working on Ubuntu 14.04 for a small haskell project I have. I use
>>> rxvt-unicode as a shell which generally seems to work fine but when I run
>>> `nix-shell` in a directly with the following `default.nix` file:
>>>
>>> { haskellPackages ? (import <nixpkgs> {}).haskellPackages }:
>>>
>>> let
>>>   inherit (haskellPackages);
>>>
>>> in
>>>   with haskellPackages; cabal.mkDerivation (self: {
>>>     pname = "jump";
>>>     version = "0.0.0";
>>>     src = ./.;
>>>     buildDepends = with haskellPackages; [ vty ];
>>>     buildTools = with haskellPackages; [ cabalInstall ];
>>>   })
>>>
>>> I get the following error when running `tput`:
>>>
>>> [nix-shell:~/root/projects/jump]$ tput setaf 7
>>> tput: unknown terminal "rxvt-unicode"
>>>
>>
>> That’s strange, could you check what does `env` in the nix-shell look
>> like?
>> The variable of interset is `TERMINFO_DIRS`.
>>
>> (And for some reason `TERMINFO` also gets set which looks wrong to me.
>> This might or might not be a bug…)
>>
>>
>>> I'm afraid I'm sufficiently clueless that I don't know how to deal with
>>> this. I'm guessing that the terminfo information for nix's bash needs to be
>>> in another folder and that the haskell 'vty' package's dependency on
>>> ncurses might be confusing things. Does anyone have any recommendations on
>>> how to investigate this further? I love the idea of nix and I'd like to get
>>> past this.
>>>
>>> My rxvt-unicode is from Ubuntu rather than a nix install. I did try to
>>> install it from nix using the recommendation from
>>> http://nixos.org/nixos/packages.html but I get:
>>>
>>> $ nix-env -iA nixos.pkgs.rxvt_unicode
>>> error: attribute ‘nixos’ in selection path ‘nixos.pkgs.rxvt_unicode’ not
>>> found
>>>
>>> Any further help would also be appreciated :)
>>>
>>> Cheers,
>>> Michael
>>> _______________________________________________
>>> nix-dev mailing list
>>> nix-dev at lists.science.uu.nl
>>> http://lists.science.uu.nl/mailman/listinfo/nix-dev
>>>
>>
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