nixos/flake.nix

# reference: https://github.com/kenranunderscore/dotfiles/blob/main/flake.nix
# also good: https://github.com/cab404/home

{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs";
    nixpkgs-stable.url = "github:NixOS/nixpkgs/nixos-23.05";
    home-manager.url = "github:nix-community/home-manager/release-23.05";
    home-manager.inputs.nixpkgs.follows = "nixpkgs";
    emacs-overlay.url = "github:nix-community/emacs-overlay";
    emacs-overlay.inputs.nixpkgs.follows = "nixpkgs";
    emacs-overlay.inputs.nixpkgs-stable.follows = "nixpkgs-stable";
    sops-nix.url = "github:Mic92/sops-nix";
    sops-nix.inputs.nixpkgs.follows = "nixpkgs";
    sops-nix.inputs.nixpkgs-stable.follows = "nixpkgs-stable";
    q-sh.url = "sourcehut:~knazarov/q.sh";
    q-sh.inputs.nixpkgs.follows = "nixpkgs";
    notes-sh.url = "sourcehut:~knazarov/notes.sh";
    notes-sh.inputs.nixpkgs.follows = "nixpkgs";
    knazarovcom.url = "sourcehut:~knazarov/knazarov.com";
    knazarovcom.inputs.nixpkgs.follows = "nixpkgs";
    vmatveevacom.url = "github:valeriya-matveeva/vmatveeva.com";
    vmatveevacom.inputs.nixpkgs.follows = "nixpkgs";
    git-plan.url = "sourcehut:~knazarov/git-plan";
    git-plan.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs = { self, nixpkgs, nixpkgs-stable, home-manager, emacs-overlay
    , sops-nix, q-sh, notes-sh, knazarovcom, vmatveevacom, git-plan, ...
    }@attrs:
    let
      system = "x86_64-linux";

      specialArgs = { inherit attrs; };
      buildConfig = modules: system: { inherit modules system specialArgs; };
      buildSystem = modules: system:
        nixpkgs.lib.nixosSystem (buildConfig modules system);
      buildSystemStable = modules: system:
        nixpkgs-stable.lib.nixosSystem (buildConfig modules system);

      hostAttrs = dir: {
        settings = import "${dir}/host-metadata.nix";
        config = import "${dir}/configuration.nix";
        hw-config = import "${dir}/hardware-configuration.nix";
      };

      node = dir:
        with hostAttrs dir;
        buildSystemStable [
          ({ config, pkgs, ... }: {
            nixpkgs.overlays = [
              emacs-overlay.overlay
              q-sh.overlays.default
              notes-sh.overlays.default
              git-plan.overlays.default
            ];
          })
          sops-nix.nixosModules.sops
          home-manager.nixosModule
          config
          hw-config
          ./configuration.nix
        ] settings.system;

      server = dir:
        with hostAttrs dir;
        buildSystem [
          ({ config, pkgs, ... }: {
            nixpkgs.overlays = [
              emacs-overlay.overlay
              q-sh.overlays.default
              knazarovcom.overlays.default
              vmatveevacom.overlays.default
            ];
          })
          sops-nix.nixosModules.sops
          home-manager.nixosModule
          config
          hw-config
          #(dir + "/configuration.nix")
        ] settings.system;
    in {
      nixosConfigurations = {
        mira = node ./nodes/mira;
        framework = node ./nodes/framework;
        knazarovcom = server ./nodes/knazarovcom;
        videos = server ./nodes/videos;
      };
    };
}