NixOSConfig/flake.nix

{
  description = "NixOS Machine Configurations by manuth";

  inputs = {
    nixpkgs.url = "nixpkgs/f7207adcc68d9cafa29e3cd252a18743ae512c6a";
    flake-utils.url = "github:numtide/flake-utils?ref=b1d9ab70662946ef0850d488da1c9019f3a9752a";

    home-manager = {
      url = "github:nix-community/home-manager?ref=892f76bd0aa09a0f7f73eb41834b8a904b6d0fad";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    sops-nix.url = "github:Mic92/sops-nix?ref=c279dec105dd53df13a5e57525da97905cc0f0d6";
  };

  outputs = { self, nixpkgs, flake-utils, home-manager, sops-nix }: (
    let
      inherit (nixpkgs) lib;

      defaultMachine = {
        system = "x86_64-linux";
        modules = [ ];

        config = { pkgs, ... }: {
          dualBoot = false;
          timeZone = "Europe/Zurich";
          keyMap = "de_CH-latin1";
          keyboardLayout = "ch";
          localeSettings =
            let defaultLocale = "en_US.UTF-8";
            in {
              LANG = "de_CH.UTF-8";
              LANGUAGE = defaultLocale;
              LC_MESSAGE = defaultLocale;
            };
          users = { };
        };
      };

      machineDefinitions = {
        nixos.config = { ... }: {
        };
        manu-surface.config = { ... }: {
        };
      };

      machines = builtins.mapAttrs (
        name: machineDefinition:
          defaultMachine // machineDefinition // {
            config = { callPackage, ... }:
              ((callPackage defaultMachine.config { }) // (callPackage machineDefinition.config { }));
          })
        machineDefinitions;

      tryFiles = import ./lib/utils/try-files.nix { inherit lib; };
    in
      flake-utils.lib.eachDefaultSystem (
        system:
          let
            pkgs = import nixpkgs {
              inherit system;
              config = {};

              overlays = [
                sops-nix.overlays.default
              ];
            };
          in {
            packages = {
              rcloneDocs =
                let
                  module = lib.evalModules {
                    modules = [
                      ({ pkgs, ... }@args: {
                        inherit (import ./lib/modules/rclone.nix args) options;
                      })
                    ];
                  };

                  optionsDoc = pkgs.nixosOptionsDoc {
                    options = module.options;
                  };
                in
                  pkgs.runCommand "options-doc.md" {} ''
                      cat ${optionsDoc.optionsCommonMark} >> $out
                  '';
            };

            devShells.default = pkgs.mkShellNoCC (
              with pkgs;
              {
                sopsPGPKeyDirs = [ 
                  "${toString ./.}/keys/hosts"
                  "${toString ./.}/keys/users"
                ];

                packages = [
                  nixos-rebuild
                  sops
                  sops-import-keys-hook
                  ssh-to-age
                  ssh-to-pgp
                ];

                nativeBuildInputs = [
                  sops-import-keys-hook
                ];
              });
          }
      ) // {
        nixosConfigurations =
            builtins.mapAttrs (
              hostname: { system, config, modules }@machine: nixpkgs.lib.nixosSystem {
                inherit system;

                modules = [
                  (
                    { pkgs, ... }: {
                      config = {
                        _module.args = {
                          machine = machine // {
                            name = hostname;
                            config = (pkgs.callPackage config { });
                          };
                        };

                        home-manager.sharedModules = [
                          sops-nix.homeManagerModules.sops
                        ];
                      };
                    })
                  home-manager.nixosModules.home-manager
                  sops-nix.nixosModules.sops
                  ./lib/configuration.nix
                  (tryFiles [ ./lib/machines/${hostname}.nix ] ./lib/hardware/base.nix)
                ] ++ modules;
              })
              machines;

        homeConfigurations =
          let
            lib = nixpkgs.lib;
          in
            lib.attrsets.concatMapAttrs (
              hostname: machine:
                let
                  pkgs = import nixpkgs {
                    inherit (machine) system;
                  };

                  machineConfig = pkgs.callPackage machine.config { };
                in
                  lib.attrsets.concatMapAttrs (
                    username: user: {
                      "${username}@${hostname}" = home-manager.lib.homeManagerConfiguration {
                        modules =
                          let
                            getUserModule = pkgs.callPackage (import ./lib/utils/user-module.nix);
                          in
                            getUserModule {
                              machine = machine // {
                                name = hostname;
                                config = machineConfig;
                              };

                              user = {
                                name = username;
                              } // user;
                            } ++ [
                              sops-nix.homeManagerModules.sops
                            ];
                      };
                    })
                  machineConfig.users)
              machines;
      });
}