build(flake): add home-manager and example config

README.md

@@ -8,3 +8,9 @@ The list of generated files are:
 - [README.md](README.md)
 ## Structure
   The system configurations are defined in [`flake.manifest`](nix/manifest.nix).
+  The attribute `flake.modules.nixos.common` provides options that will be applied to every system.
+You can use it as seen [here](nix/modules/flake/home-manager.nix):
+
+```nix
+flake.modules.nixos.common.imports = [ inputs.home-manager.nixosModules.default ];
+```

flake.lock

@@ -96,6 +96,26 @@
         "type": "github"
       }
     },
+    "home-manager": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1751810302,
+        "narHash": "sha256-iV3C4l4XqPFcfJIHWQTOeSTuDgFg+ESdUeiYxCSgebE=",
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "rev": "502d9b7d30a1f5940ecdb786b4f71ebf57b1ac13",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "type": "github"
+      }
+    },
     "import-tree": {
       "locked": {
         "lastModified": 1751399845,
@@ -154,6 +174,7 @@
         "files": "files",
         "flake-parts": "flake-parts",
         "git-hooks": "git-hooks",
+        "home-manager": "home-manager",
         "import-tree": "import-tree",
         "make-shell": "make-shell",
         "nixpkgs": "nixpkgs",

flake.nix

@@ -9,6 +9,11 @@
       url = "github:hercules-ci/flake-parts";
       inputs.nixpkgs-lib.follows = "nixpkgs";
     };
+    # home-manager manages our user packages and dotfiles
+    home-manager = {
+      url = "github:nix-community/home-manager";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
     # import-tree imports all nix files in a given directory.
     import-tree.url = "github:vic/import-tree";
     # files lets us write text files and automatically add checks for them

nix/files/readme.nix

@@ -9,6 +9,12 @@
     parts."Structure" = # markdown
       ''
           The system configurations are defined in [`flake.manifest`](nix/manifest.nix).
+          The attribute `flake.modules.nixos.common` provides options that will be applied to every system.
+        You can use it as seen [here](nix/modules/flake/home-manager.nix):
+
+        ```nix
+        flake.modules.nixos.common.imports = [ inputs.home-manager.nixosModules.default ];
+        ```
       '';
   };
 

nix/modules/flake/home-manager.nix

@@ -0,0 +1,13 @@
+{ inputs, ... }:
+let
+  hm = inputs.home-manager;
+  globalCfg = {
+    imports = [ hm.nixosModules.home-manager ];
+    home-manager.useGlobalPkgs = true;
+    home-manager.useUserPackages = true;
+  };
+in
+{
+  imports = [ hm.flakeModules.home-manager ];
+  flake.modules.nixos.common = globalCfg;
+}