Add dev shells

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

README.md

@@ -11,6 +11,7 @@ NixOS dotfiles and configuration for various hosts and users.
     - [`system/`](./hosts/common/system): System-level configurations and scripts.
       - [`configs/`](./hosts/common/system/configs): System configurations applicable to all hosts.
       - [`scripts/`](./hosts/common/system/scripts): Utility scripts, such as `nix-cleanup`.
+      - [`shells/`](./hosts/common/system/shells): Nix dev shells.
     - [`user/`](./hosts/common/user): Per-user options.
       - [`configs/`](./hosts/common/user/configs): User configurations, split into:
         - [`console/`](./hosts/common/user/configs/console): Console-related settings.

flake.lock

@@ -57,6 +57,24 @@
         "type": "github"
       }
     },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems_2"
+      },
+      "locked": {
+        "lastModified": 1726560853,
+        "narHash": "sha256-X6rJYSESBVr3hBoH0WbKE5KvhPU5bloyZ2L4K60/fPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "c1dfcf08411b08f6b8615f7d8971a2bfa81d5e8a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
     "home-manager": {
       "inputs": {
         "nixpkgs": [
@@ -129,6 +147,7 @@
       "inputs": {
         "ags": "ags",
         "disko": "disko",
+        "flake-utils": "flake-utils",
         "home-manager": "home-manager",
         "nixpkgs": "nixpkgs",
         "nur": "nur",
@@ -192,6 +211,21 @@
         "repo": "default-linux",
         "type": "github"
       }
+    },
+    "systems_2": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
     }
   },
   "root": "root",

flake.nix

@@ -45,6 +45,10 @@
       url = "github:nix-community/NUR";
     };
 
+    flake-utils = {
+      url = "github:numtide/flake-utils";
+    };
+
     ags = {
       url = "github:Aylur/ags";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -68,7 +72,19 @@
           modules = [ ./hosts/eirene ];
         };
       };
+    }
+    // inputs.flake-utils.lib.eachDefaultSystem (
+      system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+      in
+      {
+        devShells = {
+          nix = import ./hosts/common/system/shells/nix { inherit pkgs; };
+          python = import ./hosts/common/system/shells/python { inherit pkgs; };
+        };
 
-      formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.nixfmt-rfc-style;
-    };
+        formatter = pkgs.nixfmt-rfc-style;
+      }
+    );
 }

hosts/common/system/configs/printing/default.nix

@@ -33,5 +33,4 @@
       config.environment.persistence."/persist"."/var/lib/cups/printers.conf".mount
     ];
   };
-
 }

hosts/common/system/shells/nix/default.nix

@@ -0,0 +1,12 @@
+{ pkgs, ... }:
+pkgs.mkShell {
+  packages = with pkgs; [
+    nix
+    nil
+    nixpkgs-fmt
+  ];
+
+  shellHook = ''
+    exec $SHELL
+  '';
+}

hosts/common/system/shells/python/default.nix

@@ -0,0 +1,8 @@
+{ pkgs, ... }:
+pkgs.mkShell {
+  packages = with pkgs; [ python3 ];
+
+  shellHook = ''
+    exec $SHELL
+  '';
+}