created mkHost and mkHomeConfiguration

aspects/constants.nix

@@ -1,4 +1,9 @@
-{ lib, config, ... }:
+{
+  inputs,
+  lib,
+  config,
+  ...
+}:
 
 let
   # Host submodule type
@@ -132,6 +137,81 @@ in
             local-data = lanData;
           }
         ];
+      # Generates flake.homeConfigurations
+      mkHomeConfiguration =
+        {
+          user,
+          hostname,
+          system ? "x86_64-linux",
+          stateVersion ? "22.05",
+          nixpkgs ? inputs.nixpkgs, # override with e.g. inputs.nixpkgs-stable
+          userModules ? [ ],
+          overlays ? [ inputs.self.overlays.default ],
+          homeManagerModules ? with inputs.self.modules.homeManager; [
+            base
+            cli
+          ],
+          userDirectory ? "/home/${user}",
+        }:
+        inputs.home-manager.lib.homeManagerConfiguration {
+          pkgs = nixpkgs.legacyPackages.${system};
+
+          extraSpecialArgs = {
+            inherit inputs hostname;
+          };
+
+          modules = [
+            { nixpkgs.overlays = overlays; }
+            {
+              home = {
+                username = user;
+                homeDirectory = userDirectory;
+                inherit stateVersion;
+              };
+            }
+            ((inputs.import-tree.initFilter (p: lib.hasSuffix ".nix" p))
+              "/${inputs.self}/aspects/users/_${user}"
+            )
+          ]
+          ++ homeManagerModules
+          ++ userModules;
+        };
+      # Generates flake.nixosConfigurations
+      mkHost =
+        {
+          hostname,
+          system ? "x86_64-linux",
+          nixpkgs ? inputs.nixpkgs,
+          overlays ? [
+            inputs.agenix.overlays.default
+            inputs.self.overlays.default
+          ],
+          ephemeralRootDev ? null, # pass rootDevice string to enable, e.g. ephemeralephemeralRootDev = "/dev/mapper/cryptroot"
+          nixosModules ? with inputs.self.modules.nixos; [
+            base
+            cli
+            user
+            root
+          ],
+          extraModules ? [ ],
+        }:
+        nixpkgs.lib.nixosSystem {
+          inherit system;
+          specialArgs = { inherit inputs; };
+          modules = [
+            inputs.agenix.nixosModules.default
+            { networking.hostName = hostname; }
+            { nixpkgs.overlays = overlays; }
+            ((inputs.import-tree.initFilter (p: lib.hasSuffix ".nix" p))
+              "${inputs.self}/aspects/hosts/_${hostname}"
+            )
+          ]
+          ++ (lib.optional (ephemeralRootDev != null) (
+            inputs.self.factory.ephemeral { rootDevice = ephemeralRootDev; }
+          ))
+          ++ nixosModules
+          ++ extraModules;
+        };
     };
   };
 }

aspects/hosts/alexandria.nix

@@ -1,33 +1,19 @@
-{ inputs, lib, ... }:
+{ inputs, ... }:
+
+let
+  mkHost = inputs.self.lib.mkHost;
+in
 
 {
-  flake.nixosConfigurations.alexandria = inputs.nixpkgs-stable.lib.nixosSystem {
-    system = "x86_64-linux";
-    specialArgs = { inherit inputs; };
-    modules = [
-      inputs.agenix.nixosModules.default
-      { networking.hostName = "alexandria"; }
-      {
-        nixpkgs.overlays = [
-          inputs.agenix.overlays.default
-          inputs.self.overlays.default
-        ];
-      }
-      ((inputs.import-tree.initFilter (p: lib.hasSuffix ".nix" p)) ./_alexandria)
-    ]
-    ++ (with inputs.self.modules.nixos; [
-      # system aspects
-      base
-      cli
+  flake.nixosConfigurations.alexandria = mkHost {
+    hostname = "alexandria";
+    nixpkgs = inputs.nixpkgs-stable;
+    extraModules = with inputs.self.modules.nixos; [
+      # base aspects
       server
-
-      # user aspects
-      user
-      root
-
       # other aspects
       fwupd
       libvirtd
-    ]);
+    ];
   };
 }

aspects/hosts/io.nix

@@ -1,34 +1,17 @@
-{ inputs, lib, ... }:
+{ inputs, ... }:
+
+let
+  mkHost = inputs.self.lib.mkHost;
+in
 
 {
-  flake.nixosConfigurations.io = inputs.nixpkgs.lib.nixosSystem {
-    system = "x86_64-linux";
-    specialArgs = { inherit inputs; };
-    modules = [
-      inputs.agenix.nixosModules.default
-      { networking.hostName = "io"; }
-      {
-        nixpkgs.overlays = [
-          inputs.agenix.overlays.default
-          inputs.self.overlays.default
-        ];
-      }
-      ((inputs.import-tree.initFilter (p: lib.hasSuffix ".nix" p)) ./_io)
-      (inputs.self.factory.ephemeral {
-        rootDevice = "/dev/mapper/cryptroot";
-      })
-    ]
-    ++ (with inputs.self.modules.nixos; [
-      # system aspects
-      base
-      cli
+  flake.nixosConfigurations.io = mkHost {
+    hostname = "io";
+    ephemeral = "/dev/mapper/cryptroot";
+    extraModules = with inputs.self.modules.nixos; [
+      # base aspects
       desktop
-
-      # user aspects
-      user
-      root
-
-      # Other aspects
+      # other aspects
       ai
       bluetooth
       dev
@@ -36,6 +19,6 @@
       networkmanager
       niri
       podman
-    ]);
+    ];
   };
 }

aspects/hosts/rotterdam.nix

@@ -1,34 +1,17 @@
-{ inputs, lib, ... }:
+{ inputs, ... }:
+
+let
+  mkHost = inputs.self.lib.mkHost;
+in
 
 {
-  flake.nixosConfigurations.rotterdam = inputs.nixpkgs.lib.nixosSystem {
-    system = "x86_64-linux";
-    specialArgs = { inherit inputs; };
-    modules = [
-      inputs.agenix.nixosModules.default
-      { networking.hostName = "rotterdam"; }
-      {
-        nixpkgs.overlays = [
-          inputs.agenix.overlays.default
-          inputs.self.overlays.default
-        ];
-      }
-      ((inputs.import-tree.initFilter (p: lib.hasSuffix ".nix" p)) ./_rotterdam)
-      (inputs.self.factory.ephemeral {
-        rootDevice = "/dev/mapper/cryptroot";
-      })
-    ]
-    ++ (with inputs.self.modules.nixos; [
-      # system aspects
-      base
-      cli
+  flake.nixosConfigurations.rotterdam = mkHost {
+    hostname = "rotterdam";
+    ephemeral = "/dev/mapper/cryptroot";
+    extraModules = with inputs.self.modules.nixos; [
+      # base aspects
       desktop
       gaming
-
-      # user aspects
-      user
-      root
-
       # other aspects
       ai
       bluetooth
@@ -38,6 +21,6 @@
       networkmanager
       niri
       podman
-    ]);
+    ];
   };
 }

aspects/hosts/trantor.nix

@@ -1,31 +1,18 @@
-{ inputs, lib, ... }:
-{
-  flake.nixosConfigurations.trantor = inputs.nixpkgs-stable.lib.nixosSystem {
-    system = "aarch64-linux";
-    specialArgs = { inherit inputs; };
-    modules = [
-      inputs.agenix.nixosModules.default
-      { networking.hostName = "trantor"; }
-      {
-        nixpkgs.overlays = [
-          inputs.agenix.overlays.default
-          inputs.self.overlays.default
-        ];
-      }
-      ((inputs.import-tree.initFilter (p: lib.hasSuffix ".nix" p)) ./_trantor)
-      (inputs.self.factory.ephemeral {
-        rootDevice = "/dev/disk/by-id/scsi-360b207ed25d84372a95d1ecf842f8e20-part2";
-      })
-    ]
-    ++ (with inputs.self.modules.nixos; [
-      # system aspects
-      base
-      cli
-      server
+{ inputs, ... }:
 
-      # user aspects
-      user
-      root
-    ]);
+let
+  mkHost = inputs.self.lib.mkHost;
+in
+
+{
+  flake.nixosConfigurations.trantor = mkHost {
+    hostname = "trantor";
+    system = "aarch64-linux";
+    nixpkgs = inputs.nixpkgs-stable;
+    ephemeral = "/dev/disk/by-id/scsi-360b207ed25d84372a95d1ecf842f8e20-part2";
+    extraModules = with inputs.self.modules.nixos; [
+      # base aspects
+      server
+    ];
   };
 }

aspects/users/user.nix

@@ -1,7 +1,12 @@
-{ ... }:
+{ inputs, ... }:
+
+let
+  mkHomeConfiguration = inputs.self.lib.mkHomeConfiguration;
+in
 
 {
-  flake.modules.nixos.user =
+  flake = {
+    modules.nixos.user =
       { pkgs, ... }:
       {
         users.users.user = {
@@ -19,4 +24,32 @@
           hashedPassword = "$6$Pj7v/CpstyuWQQV0$cNujVDhfMBdwlGVEnnd8t71.kZPixbo0u25cd.874iaqLTH4V5fa1f98V5zGapjQCz5JyZmsR94xi00sUrntT0";
         };
       };
+    homeConfigurations = {
+      "user@rotterdam" = mkHomeConfiguration {
+        user = "user";
+        hostname = "rotterdam";
+        userModules = with inputs.self.modules.homeManager; [
+          # system aspects
+          desktop
+          gaming
+
+          # other aspects
+          stylix
+          niri
+        ];
+      };
+      "user@io" = mkHomeConfiguration {
+        user = "user";
+        hostname = "io";
+        userModules = with inputs.self.modules.homeManager; [
+          # system aspects
+          desktop
+
+          # other aspects
+          stylix
+          niri
+        ];
+      };
+    };
+  };
 }

aspects/users/user_io.nix

@@ -1,32 +0,0 @@
-{ inputs, lib, ... }:
-
-{
-  flake."user@io" = inputs.home-manager.lib.homeManagerConfiguration {
-    pkgs = inputs.nixpkgs.legacyPackages.x86_64-linux;
-    extraSpecialArgs = {
-      inherit inputs;
-      hostname = "io";
-    };
-    modules = [
-      { nixpkgs.overlays = [ inputs.self.overlays.default ]; }
-      {
-        home = {
-          username = "user";
-          homeDirectory = "/home/user";
-          stateVersion = "22.05";
-        };
-      }
-      ((inputs.import-tree.initFilter (p: lib.hasSuffix ".nix" p)) ./_user)
-    ]
-    ++ (with inputs.self.modules.homeManager; [
-      # system aspects
-      base
-      cli
-      desktop
-
-      # other aspect
-      stylix
-      niri
-    ]);
-  };
-}

aspects/users/user_rotterdam.nix

@@ -1,35 +0,0 @@
-{ inputs, lib, ... }:
-
-{
-  flake.homeConfigurations = {
-    "user@rotterdam" = inputs.home-manager.lib.homeManagerConfiguration {
-      pkgs = inputs.nixpkgs.legacyPackages.x86_64-linux;
-      extraSpecialArgs = {
-        inherit inputs;
-        hostname = "rotterdam";
-      };
-      modules = [
-        { nixpkgs.overlays = [ inputs.self.overlays.default ]; }
-        {
-          home = {
-            username = "user";
-            homeDirectory = "/home/user";
-            stateVersion = "22.05";
-          };
-        }
-        ((inputs.import-tree.initFilter (p: lib.hasSuffix ".nix" p)) ./_user)
-      ]
-      ++ (with inputs.self.modules.homeManager; [
-        # system aspects
-        base
-        cli
-        desktop
-        gaming
-
-        # other aspects
-        stylix
-        niri
-      ]);
-    };
-  };
-}