Flake pass parameterr to dynamic user name on build

Help
1

I have this flake.nix who I have to keep changing user variable between My two machines, But I have files .nix in common using the variable.
flake.nix · GitHub

Have any way to pass this variable as parameter on the nixos-rebuild to change dynamically ?

2

You can use genAttrs to have one attribute for each of your users. nixos-rebuild should be able to pick the correct one based on your host name.

3

Why do you need to change variables between to machines?

2 machines should mean 2 configurations, which seem to be defined in a file that you haven’t shown.

4

Im using this file in common home.nix · GitHub, this applications have to be in both machines, so I figure I dont need repeat in the host files, right ? Im new in nix language, can you give me a example on genAttrs? I read the files on github but I dont undestood

5

here my flake repo to be clear: GitHub - pedrohms/flake-config

6

What exactly is it you have to change?

I see 3 machines and 2 home configs, what exactly do you want to pass different “variables”?

Instead of using the user variable in the standalone configs, I have to be honest, you should just hardcode the relevant names!

Similarily for the 3 system configurations.

And of course, use inline modules as already showed above.

7

something like this should work

{
  nixosConfigurations = genAttrs [ "pedro" "framework" ] (user: nixosSystem {
    # blah blah blah
  });
}

I’m not sure why you would have 3 different configs for each username, did you want to have 6 different configs?

8

Ty @figsoda . Im new on nixos, but I have 1 config for each machine, and a home-manager flake for home-manager testing.

9

In your hosts/default.nix, you have notepedro, desenv07, and vm, how do they correspond to the usernames?

10

undefined variable ‘genAttrs’

2023-02-27-@15-48-01-scrot
2023-02-27-@15-48-01-scrot1508×341 153 KB

11

this is in lib (nixpkgs.lib)

12

returning error: “error: value is a set while a string was expectederror: value is a set while a string was expected”. I have tried 2 ways:

Passing genAttrs to user but hes giving me error above:

error: value is a set while a string was expected

And passing as a functoin to nixosConfigurations:

  nixosConfigurations = nixpkgs.lib.genAttrs["desenv07" "notepedro"] ( user: nixosSystem {>
     (import ./hosts >{
       inherit (nixpkg>s) lib;
       inherit inputs n>ixpkgs user location  home-manager my-overlays;
     });
   }
 );

and its returning:

error: syntax error, unexpected ‘(’

from nix flake check.

13

Im hardcoding the user, but would be better if I could pass a parameter to set the user, because If I choose share this configuration with friends they could just choose which profile they prefer. Ps.: The third machine its, me testing a virtual machine configuration. The current flake configuration works flawless just missing this user issue

14

If your friends want to just copy, then they shall copy the relevant parts, not everything.