nix-dots/flake.nix

{
  description = "Nix Dotfiles with flake";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-26.05";
    home-manager = {
      url = "github:nix-community/home-manager/release-26.05";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    nix-flatpak.url = "github:gmodena/nix-flatpak/?ref=v0.7.0";
    dms = {
      url = "github:AvengeMedia/DankMaterialShell/stable";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs =
    {
      self,
      nix-flatpak,
      ...
    }@inputs:

    let
      lib = inputs.nixpkgs.lib;
      hosts = import ./config/hosts.nix;

      mkHomeConfigurations =
        {
          host,
          nixpkgs,
          home-manager,
          modules ? [ ],
        }:
        home-manager.lib.homeManagerConfiguration {
          pkgs = import nixpkgs {
            system = host.arch;
            config = {
              allowUnfree = true;
            };
          };
          extraSpecialArgs = { inherit inputs host; };
          modules = [
            ./hosts/${host.dir}/home
          ] ++ modules;
        };

      mkNixOSConfigurations =
        {
          host,
          nixpkgs,
          home-manager,
          modules ? [ ],
          overlays ? [],
        }:
        nixpkgs.lib.nixosSystem {
          system = host.arch;
          specialArgs = {
            inherit inputs host;
          };
          modules = [
            nix-flatpak.nixosModules.nix-flatpak
            ./hosts/${host.dir}/nixos
            { nixpkgs.overlays = overlays; }
            home-manager.nixosModules.home-manager
            {
              home-manager.extraSpecialArgs = { inherit inputs host; };
              home-manager.useGlobalPkgs = true;
              home-manager.useUserPackages = true;
              home-manager.backupFileExtension = "backup";
              home-manager.users."${host.user}" = import ./hosts/${host.dir}/home;
            }
          ] ++ modules;
        };
      mkISOConfiguration = # Build with: nix build .#nixosConfigurations.<hostname>-iso.config.system.build.isoImage
        {
          host,
          nixpkgs,
        }:
        nixpkgs.lib.nixosSystem {
          system = host.arch;
          modules = [
            ./hosts/${host.dir}/iso.nix
            { networking.hostName = "${host.hostname}-iso"; }
          ];
        };
    in
    {
      nixosConfigurations =
        lib.mapAttrs
          (name: host:
            mkNixOSConfigurations {
              inherit host;
              nixpkgs = inputs.nixpkgs;
              home-manager = inputs.home-manager;
            }
          )
          hosts
        // lib.mapAttrs'
          (name: host:
            lib.nameValuePair
              "${host.hostname}-iso"
              (mkISOConfiguration {
                inherit host;
                nixpkgs = inputs.nixpkgs;
              })
          )
          hosts;

      homeConfigurations = lib.mapAttrs'
        (name: host:
          lib.nameValuePair
            "${host.user}@${host.hostname}"
            (mkHomeConfigurations {
              inherit host;
              nixpkgs = inputs.nixpkgs;
              home-manager = inputs.home-manager;
            })
        )
        hosts;
    };
}