[Nix-dev] Pass arguments to 'required' configs

[Sergey Mironov]

Nicolas, this solution makes sense if I understand how to include
private modules to local configuration. (We are discussing this in a
separate thread).

Regards,
Sergey

2015-11-17 17:55 GMT+03:00 Nicolas Pierron <nicolas.b.pierron at gmail.com>:
> Hi Sergey,
>
> If you are not using the proxy_port and proxy_host values for
> selecting the modules, I suggest you use the module system instead.
> This means that your previous example would become something like the
> example below. This solution is a bit more verbose, but you might be
> able to introspect these options with nixos-option command line tool
> and NixUI.
>
> // configuration.nix
> {
>   require = [
>     /etc/nixos/configuration.nix
>     ./include/global_bash_aliases.nix
>   ];
>
>   custom.go.proxy.port = 4343;
>   custom.go.proxy.host = "myproxy.local";
>   …
> }
>
> // ./include/global_bash_aliases.nix
>
> { config, pkgs, lib, ... } :
>
> with lib;
> {
>   options = {
>     custom.go.proxy.port = mkOption {
>       default = 4242;
>       example = 4343;
>       type = types.uniq types.int;
>       description = ''
>         port number used by the goproxy shell alias command.
>       '';
>     };
>
>     custom.go.proxy.host = mkOption {
>       example = "example.com";
>       type = types.uniq types.str;
>       description = ''
>         host name used by the goproxy shell alias command.
>       '';
>     };
>   };
>
>   config = {
>     environment = {
>
>       extraInit = with config.custom.go.proxy ''
>          alias goproxy "nc ${port} ${host}
>       '';
>     };
>   };
> }
>
>
> On Tue, Nov 17, 2015 at 2:17 PM, Sergey Mironov <grrwlf at gmail.com> wrote:
>> Hi. This is a follow-up to my previous letter about Private NixOS modules.
>>
>> Another thing I am missing is the ability to pass arguments to
>> 'required' configuration modules. Below is the illustration of the
>> idea. Could you please give me some advice on this?
>>
>> Regards,
>> Sergey
>>
>>
>> // configuration.nix
>>
>> {config, pkgs, ...}:
>> let
>>   proxy_port = "4343";
>>   proxy_host = "myproxy.local";
>> in
>> {
>>   require = [
>>     /etc/nixos/hardware-configuration.nix
>>     ..
>>     (withArguments ./include/global_bash_aliases.nix { inherit
>> proxy_port  proxy_host; })
>>     ..
>>   ];
>>  ...
>>
>> }
>>
>>
>> //./include/global_bash_aliases.nix
>>
>> { proxy_port, proxy_host} :
>> { config, pkgs, ... } :
>> {
>>   environment = rec {
>>
>>     extraInit = ''
>>        alias goproxy "nc ${proxy_port} ${proxy_host}
>>     '';
>>   };
>>
>> }
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>
>
>
> --
> Nicolas Pierron
> http://www.linkedin.com/in/nicolasbpierron - http://nbp.name/