Create Nix module

flake.lock

@@ -1,5 +1,23 @@
 {
   "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1731319897,
@@ -18,8 +36,24 @@
     },
     "root": {
       "inputs": {
+        "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs"
       }
+    },
+    "systems": {
+      "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

@@ -3,14 +3,23 @@
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+    flake-utils.inputs.nixpkgs.follows = "nixpkgs";
   };
 
   outputs = {
     self,
     nixpkgs,
-  }: {
+    flake-utils,
-    packages.x86_64-linux.tauron-scrapper = nixpkgs.legacyPackages.x86_64-linux.callPackage ./package.nix {};
+  }:
+    flake-utils.lib.eachDefaultSystem (system: let
+      pkgs = nixpkgs.legacyPackages.${system};
+    in {
+      packages = rec {
+        tauron-scrapper = pkgs.callPackage ./package.nix {};
+        default = tauron-scrapper;
+      };
 
-    packages.x86_64-linux.default = self.packages.x86_64-linux.tauron-scrapper;
+      nixosModules.tauron-scrapper = pkgs.callPackage ./module.nix {inherit self;};
-  };
+    });
 }

module.nix

@@ -0,0 +1,100 @@
+{
+  config,
+  coreutils-full,
+  formats,
+  system,
+  utils,
+  lib,
+  self,
+  ...
+}:
+with lib; let
+  inherit (utils.systemdUtils.unitOptions) unitOption;
+  cfg = config.services.tauron-scrapper;
+  yamlConfig = (formats.yaml {}).generate "tauron-scrapper-config.yaml" cfg.config;
+in {
+  options.services.tauron-scrapper = {
+    enable = mkEnableOption "tauron-scrapper";
+
+    config = mkOption {
+      type = types.attr;
+      description = "The configuration of tauron-scrapper command";
+      example = {
+        timezone = "Europe/Warsaw";
+
+        tauron = {
+          usernamePath = "/run/tauron.username.key";
+          passwordPath = "/run/tauron.password.key";
+          point = "123456";
+        };
+
+        consumers = {
+          influxdb = {
+            enable = true;
+            databaseURL = "https://influxdb.lan";
+            apiToken = "/run/mqtt/influxdb.token.key";
+            organization = "home";
+            bucket = "tauron";
+          };
+
+          mqtt = {
+            enable = true;
+            brokerURL = "https://mqtt.lan";
+            usernamePath = "/run/mqtt.username.key";
+            passwordPath = "/run/mqtt.password.key";
+            clientId = "tauron-scrapper";
+            prefix = "tauron";
+            publishOptions = {
+              qos = 2;
+              retain = true;
+            };
+          };
+        };
+      };
+    };
+
+    timerConfig = mkOption {
+      type = types.nullOr (types.attrsOf unitOption);
+
+      default = {
+        OnCalendar = "*-*-* 03:00";
+        Persistent = true;
+      };
+
+      description = lib.mdDoc ''
+        When to run the scrapping. See {manpage}`systemd.timer(5)` for
+        details. If null no timer is created and the data will only
+        be fetched when explicitly triggered.
+      '';
+
+      example = {
+        OnCalendar = "00:05";
+        Persistent = true;
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.timers.tauron-scrapper = {
+      description = "Tauron Scapper";
+      wantedBy = ["timers.target"];
+
+      timerConfig =
+        cfg.timerConfig
+        // {
+          Unit = "tauron-scrapper.service";
+        };
+    };
+
+    systemd.services.tauron-scrapper = {
+      description = "Tauron Scrapper";
+
+      serviceConfig.Type = "oneshot";
+      path = [self.packages.${system}.tauron-scrapper coreutils-full];
+
+      script = ''
+        tauron-scrapper -c ${yamlConfig} -d "$(date -d "yesterday" '+%Y-%m-%d')"
+      '';
+    };
+  };
+}