# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, lib, pkgs, modulesPath, ... }:
{
  deployment = {
    targetHost = "x.x.x.x";
  };
  networking.hostName = "HOST";
  home-manager.users.su = { pkgs, ... }: {
    home.file."dash.sh".source = dashFile;
  };
  imports =
    [
      ../lib/dashboard.nix
      ../lib/wifi.nix
    ];
...
}

So that's the node.nix file

And then we've got the ../lib/dashboard.nix file that contains

{ config, lib, pkgs, modulesPath, home-manager, ... }:
{
  deployment.targetUser = "su";
  imports = [
    (modulesPath + "/installer/scan/not-detected.nix")
    (home-manager + "/nixos" )
  ];
...
}

# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, lib, pkgs, modulesPath, ... }:
let
  dashFile = "some_file.txt";
in
{
  deployment = {
    targetHost = "x.x.x.x";
  };
  networking.hostName = "HOST";
  home-manager.users.su = { pkgs, ... }: {
    home.file."dash.sh".source = dashFile; # dashFile is a variable declared above
  };
  imports =
    [
      ../lib/dashboard.nix
      ../lib/wifi.nix
    ];
...
}

So that's the node.nix file

# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, lib, pkgs, modulesPath, ... }:
let
  dashFile = ./some_file.txt;
in
{
  deployment = {
    targetHost = "x.x.x.x";
  };
  networking.hostName = "HOST";
  home-manager.users.su = { pkgs, ... }: {
    home.file."dash.sh".source = dashFile; # dashFile is a variable declared above
  };
  imports =
    [
      ../lib/dashboard.nix
      ../lib/wifi.nix
    ];
...
}

So that's the node.nix file

And from flake.lock

    "colmena": {
      "inputs": {
        "flake-compat": "flake-compat",
        "nixpkgs": "nixpkgs",
        "utils": "utils"
      },
      "locked": {
        "lastModified": 1630033162,
        "narHash": "sha256-1Vh0d2t2aSfvEXx1iQ1TRNpFfncTE3G+T0Co+dRppBo=",
        "owner": "zhaofengli",
        "repo": "colmena",
        "rev": "37b43cd6d7f924e6eb7eaa7b17852d813cf96c31",
        "type": "github"
      },
      "original": {
        "owner": "zhaofengli",
        "repo": "colmena",
        "type": "github"
      }

the stub:

colmena =
    { meta.nixpkgs = nixpkgs.legacyPackages."x86_64-linux"; } //
    builtins.mapAttrs
      (name: value: {
        nixpkgs.system = value.config.nixpkgs.system;
        imports = value.extraArgs.modules ++ [
          ({ config, ... }: { inherit (config.sconfig) deployment; })
        ];
      })
      (nixosConfigurations);

In reply to @buckley310:matrix.org
So I'm curious. In my setup my servers all exist inside of my flake outputs.nixosConfigurations, and my outputs.colmena is just a stub that consumes nixosConfigurations and emits a colmena configuration. Is anyone else doing it this way, or just me? I really like the portability of keeping my hosts in nixosConfigurations

In reply to @buckley310:matrix.org

the stub:

colmena =
    { meta.nixpkgs = nixpkgs.legacyPackages."x86_64-linux"; } //
    builtins.mapAttrs
      (name: value: {
        nixpkgs.system = value.config.nixpkgs.system;
        imports = value.extraArgs.modules ++ [
          ({ config, ... }: { inherit (config.sconfig) deployment; })
        ];
      })
      (nixosConfigurations);

In reply to @necrophcodr:matrix.org
Hmm, I tried implementing this, but I'm not sure where you're getting config.sconfig from? I don't see an sconfig attribute to be fetched from there?

In reply to @zhaofeng:zhaofeng.li
Yeah, we should probably have an option like that, or have an option to configure a set of "freeform" SSH configs.

thought experiment, what if basically all of the connection settings got merged into SSH options. get rid of deployment.targetPort, deployment.targetUser, etc, and replace it with something like this

colmena = {
  meta = {
    nixpkgs = import nixpkgs {
      system = "x86_64-linux";
    };
    ssh = {
      IdentityFile = "/home/me/.ssh/id_xyz";
    };
  };
  host-b = {
    deployment = {
      ssh.HostName = "somehost.tld";
      ssh.Port = "1234";
      ssh.User = "luser";
    };
    boot.isContainer = true;
    time.timeZone = "America/Los_Angeles";
  };
};

which would then compile this following ssh config file for colmena to just blindly pass to ssh

IdentityFile /home/me/.ssh/id_xyz

Host host-b
    HostName somehost.tld
    Port 1234
    User luser