add module, fix 'nix-build'

flake.nix

@@ -1,5 +1,6 @@
 {
-  description = "pr-status: a tool to query NixOS/nixpkgs pull request status as they move along the build chain";
+  description =
+    "pr-status: a tool to query NixOS/nixpkgs pull request status as they move along the build chain";
 
   inputs.nixpkgs.url = "nixpkgs/nixos-22.11";
 
@@ -10,16 +11,17 @@
       forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
       nixpkgsFor = forAllSystems (system: import nixpkgs { inherit system; });
     in {
+      overlay = final: prev: {
+        pr-status = self.packages.${prev.system}.pr-status;
+      };
+      nixosModule = import ./module.nix;
       packages = forAllSystems (system:
         let pkgs = nixpkgsFor.${system};
         in {
-          pr-status = pkgs.stdenv.mkDerivation {
+          pr-status = pkgs.perlPackages.buildPerlPackage {
             pname = "pr-status";
             version = "v0.0.1";
             src = ./.;
-            buildInputs = with pkgs.perlPackages; [ PerlTidy ];
-            nativeBuildInputs = with pkgs.perlPackages; [ perl ];
-
             propagatedBuildInputs = with pkgs.perlPackages; [
               Mojolicious
               JSON
@@ -30,7 +32,8 @@
           };
         });
 
-      defaultPackage = forAllSystems (system: self.packages.${system}.pr-status);
+      defaultPackage =
+        forAllSystems (system: self.packages.${system}.pr-status);
       devShells = forAllSystems (system:
         let pkgs = nixpkgsFor.${system};
         in {

module.nix

@@ -0,0 +1,70 @@
+{ lib, config, pkgs, ... }:
+let cfg = config.services.pr-status;
+in {
+  options = with lib; {
+    services.pr-status = {
+      enable = lib.mkEnableOption "Enable pr-status";
+
+      port = mkOption {
+        type = types.int;
+        default = 3003;
+        description = ''
+          Port to listen on
+        '';
+      };
+
+      user = mkOption {
+        type = with types; oneOf [ str int ];
+        default = "pr-status";
+        description = ''
+          The user the service will use.
+        '';
+      };
+
+      group = mkOption {
+        type = with types; oneOf [ str int ];
+        default = "pr-status";
+        description = ''
+          The group the service will use.
+        '';
+      };
+
+      package = mkOption {
+        type = types.package;
+        default = pkgs.pr-status;
+        defaultText = literalExpression "pkgs.pr-status";
+        description = "The package to use for pr-status";
+      };
+    };
+  };
+
+  config = lib.mkIf (cfg.enable) {
+    users.groups.${cfg.group} = { };
+    users.users.${cfg.user} = {
+      description = "pr-status service user";
+      isSystemUser = true;
+      home = "/var/lib/pr-status";
+      createHome = true;
+      group = "${cfg.group}";
+    };
+
+    systemd.services.pr-status = {
+      enable = true;
+      description = "pr-status server";
+      wantedBy = [ "network-online.target" ];
+      after = [ "network-online.target" ];
+
+      environment = { HOME = "/var/lib/pr-status"; };
+
+      serviceConfig = {
+        User = cfg.user;
+        Group = cfg.group;
+
+        ExecStart =
+          "${cfg.package}/bin/pr-status.pl daemon -m production -l http://127.0.0.1:${
+            toString cfg.port
+          }";
+      };
+    };
+  };
+}

pr-status.pl

@@ -14,7 +14,7 @@ use Time::HiRes qw( time );
 
 my $VERSION = 'v0.0.1';
 
-my $repo_dir = "/home/qbit/gostart_nixpkgs";
+my $repo_dir = "/var/lib/pr-status/nixpkgs";
 
 $ENV{"GIT_CONFIG_SYSTEM"} = "";        # Ignore insteadOf rules
 $ENV{"HOME"}              = "/tmp";    # Ignore ~/.netrc