[Nix-dev] Turn on python3 support for vim in configuration.nix

[Wink Saville]

On Sat, Sep 17, 2016 at 4:23 AM, Pavel Chuprikov <pschuprikov at gmail.com> wrote:
> Hi Wink,
>
> There are two features that vim can support: python and python3. To
> determine which one should be turned on vim's nix-expression checks the
> version of a python package that was passed to it. To enable python3 you
> need to override vimHugeX:
>
> environment = {
>   systemPackages = with pkgs; [
>     vimHugeX.override { python = python3; }
>   ];
> }

Thanks, it needed one minor tweak, it need parens around the
'(vimHugeX.override {..})':

environment = {
  systemPackages = with pkgs; [
    (vimHugeX.override { python = python3; })
  ];
}

Out of curiosity, I tried to change the features to "tiny":
environment = {
  systemPackages = with pkgs; [
    (vimHugeX.override { features = "tiny" })
  ];
}

But rebuild gives an error that python isn't supported:

     configure: error: cannot use Python with tiny or small features

I looked in pkgs/**/editors/vim/configurable.nix and can see various
places python is mentioned but I'm not familiar enough with the
nix language to ferret out how to disable it. Do you happen to know?


> --
> Pavel
>
>
>
> сб, 17 сент. 2016 г. в 0:18, Wink Saville <wink at saville.com>:
>>
>> By default vim installed via configuration.nix doesn't support python3:
>>
>> environment = {
>>   systemPackages = with pkgs; [
>>     vim
>>   ];
>> }
>>
>> $ sudo nixos-rebuild test
>> $ vim --version | grep python3
>> ... -python3 ...
>>
>> So after much searching and help from #nixos on freenode I found that
>> you can add vim_configurable or its alias vimHugeX to turn on a bunch
>> of options such as clipboard and python but it doesn't turn on
>> python3:
>>
>> environment = {
>>   systemPackages = with pkgs; [
>>     vimHugeX
>>   ];
>> }
>>
>> $ sudo nixos-rebuild test
>> $ vim --version | grep 'python3\|clipboard'
>> +clipboard       +iconv           +path_extra      +toolbar
>> +cscope          +lispindent      -python3         +vreplace
>> +eval            +mouse_dec       +startuptime     +xterm_clipboard
>>
>>
>> This post, https://goo.gl/Bej4Qo, implies you can do it and I added
>> 'nixpkgs.config.vim.python3 = true' but it doesn't work:
>>
>>   nixpkgs.config = {
>>     allowUnfree = true;
>>     vim.python3 = true;
>>   };
>>
>> environment = {
>>   systemPackages = with pkgs; [
>>     vimHugeX
>>   ];
>> }
>>
>> $ sudo nixos-rebuild test
>> $ vim --version | grep 'python3\|clipboard'
>> +clipboard       +iconv           +path_extra      +toolbar
>> +cscope          +lispindent      -python3         +vreplace
>> +eval            +mouse_dec       +startuptime     +xterm_clipboard
>>
>>
>> How how can I turn on python3, i.e. control individual vim
>> options/features, in configuration.nix?
>>
>> -- wink
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