first commit

flake.nix

@@ -0,0 +1,59 @@
+{
+  description = "mail-quota-warning package and service";
+
+  inputs.nixpkgs.url = "nixpkgs/nixos-25.11";
+
+  outputs = { self, nixpkgs }:
+  let
+    systems = [ "x86_64-linux" "i686-linux" "aarch64-linux" ];
+    forAllSystems = f: nixpkgs.lib.genAttrs systems (system: f system);
+    # Import nixpkgs with our overlay for each system.
+    nixpkgsFor = forAllSystems (system:
+      import nixpkgs {
+        inherit system;
+        overlays = [ self.overlay ];
+      }
+    );
+  in {
+    overlay = final: prev: {
+      mail-quota-warning = with final; python3Packages.buildPythonApplication {
+        pname = "mail-quota-warning";
+        version = "0.0.1";
+        format = "other";
+
+        src = self;
+
+        dependencies = with python3Packages; [
+          python
+      	  pyyaml
+      	  imaplib2
+        ];
+
+        installPhase = ''
+          install -Dm755 ${./mail-quota-warning.py} $out/bin/mail-quota-warning
+        '';
+
+      	meta.mainProgram = "mail-quota-warning";
+      };
+    };
+
+    packages = forAllSystems (system: {
+      inherit (nixpkgsFor.${system}) mail-quota-warning;
+    });
+
+    defaultPackage = forAllSystems (system: self.packages.${system}.mail-quota-warning);
+
+    devShells = forAllSystems (system: let
+      pkgs = import nixpkgs { inherit system; overlays = [ self.overlay ]; };
+    in pkgs.mkShell {
+      buildInputs = with pkgs; with python3Packages; [
+        python
+        requests
+        beautifulsoup4
+      ];
+    });
+
+    # mail-quota-warning service module
+    nixosModule = (import ./module.nix);
+  };
+}