Allow configuring user homes

flake.nix

@@ -10,10 +10,30 @@
   outputs = { self, nixpkgs, flake-utils, sops-nix }: (
     let
       inherit (nixpkgs) lib;
+
+      defaultMachine = {
+        system = "x86_64-linux";
+
+        config = { pkgs, ... }: {
+          dualBoot = false;
+          timeZone = null;
+          keyMap = "us";
+          keyboardLayout = "us";
+          localeSettings = { };
+          users = { };
+        };
+      };
+
+      machines = {
+        nixos.config = { ... }: {
+        };
+      };
+
+      systems = builtins.mapAttrs (name: value: defaultMachine // value) machines;
       tryFiles = files: default:
         lib.lists.foldr
         (a: b:
-          if builtins.pathExists a
+          if (a != null) && (builtins.pathExists a)
           then a
           else b)
         default
@@ -54,22 +74,8 @@
         }
       ) // {
         nixosConfigurations =
-          let
-            default = { pkgs, ... }: {
-              dualBoot = false;
-              timeZone = null;
-              keyMap = "us";
-              keyboardLayout = "us";
-              localeSettings = { };
-              users = { };
-            };
-            systems = {
-              nixos.config = { ... }: {
-              };
-            };
-          in
             builtins.mapAttrs (
-              name: { system ? "x86_64-linux", config }: nixpkgs.lib.nixosSystem {
+              name: { system, config }: nixpkgs.lib.nixosSystem {
                 inherit system;
 
                 modules = [
@@ -78,7 +84,7 @@
                       config._module.args = {
                         hostname = name;
 
-                        machineConfig = (default args) //
+                        machineConfig = (defaultMachine.config args) //
                           (config args) // {
                             inherit name;
                           };
@@ -88,7 +94,56 @@
                   ./lib/configuration.nix
                   (tryFiles [ ./lib/machines/${name}.nix ] ./lib/hardware/base.nix)
                 ];
-            })
-            systems;
-    });
+              })
+              systems;
+
+        homeConfigurations =
+          let
+            lib = nixpkgs.lib;
+          in
+            lib.attrsets.concatMapAttrs (
+              hostname: machineDeclaration:
+                let
+                  machine = machineDeclaration // defaultMachine // {
+                    config = { ... }@args: (
+                      (defaultMachine.config args) //
+                      (machineDeclaration.config args));
+                  };
+
+                  pkgs = import nixpkgs {
+                    inherit (machine) system;
+                  };
+                in
+                  lib.attrsets.concatMapAttrs (
+                    username: user: {
+                      "${username}@${hostname}" = {
+                        modules =
+                          let
+                            userConfigPath = (
+                              tryFiles [
+                                ./lib/users/${username}/${hostname}.nix
+                                ./lib/users/${username}/common.nix
+                                ./lib/users/${username}.nix
+                              ]
+                              null);
+                          in [
+                            (
+                              { pkgs, ... }: {
+                                config._module.args = {
+                                  userConfig = {
+                                    inherit
+                                      hostname
+                                      username
+                                    ;
+                                  } // user;
+                                };
+                              })
+                            sops-nix.homeManagerModules.sops
+                            ./lib/home.nix
+                          ] ++ (lib.optional (userConfigPath != null) userConfigPath);
+                      };
+                    })
+                  (machine.config { inherit pkgs; }).users)
+              machines;
+      });
 }

lib/home.nix

@@ -0,0 +1,2 @@
+{ ... }: {
+}