From 5e86139ee4af27f84228708fd32903bb0c4230f0 Mon Sep 17 00:00:00 2001
From: clerie <git@clerie.de>
Date: Tue, 9 May 2023 11:45:33 +0200
Subject: [PATCH] Bump version and add modules

---
 .gitignore |   1 +
 Cargo.lock |   2 +-
 flake.nix  | 132 ++++++++++++++++++++++++++++++++++++++++++++++++++++-
 3 files changed, 132 insertions(+), 3 deletions(-)

diff --git a/.gitignore b/.gitignore
index ea8c4bf..07c12f2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 /target
+result
diff --git a/Cargo.lock b/Cargo.lock
index c659fb0..6224217 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -450,7 +450,7 @@ dependencies = [
 
 [[package]]
 name = "nixos-exporter"
-version = "0.5.0"
+version = "0.6.0"
 dependencies = [
  "axum",
  "reqwest",
diff --git a/flake.nix b/flake.nix
index f7ae95f..56ed915 100644
--- a/flake.nix
+++ b/flake.nix
@@ -10,7 +10,7 @@
     in {
       nixos-exporter = pkgs.rustPlatform.buildRustPackage rec {
         pname = "nixos-exporter";
-        version = "0.5.0";
+        version = "0.6.0";
 
         src = ./.;
 
@@ -33,12 +33,140 @@
         type = "app";
         program = self.packages.x86_64-linux.nixos-exporter + "/bin/nixos-exporter";
       };
+      nixos-validator = {
+        type = "app";
+        program = self.packages.x86_64-linux.nixos-exporter + "/bin/nixos-validator";
+      };
       default = self.apps.x86_64-linux.nixos-exporter;
     };
 
+
+    nixosModules = {
+      nixos-exporter = { config, pkgs, lib, ... }:
+      with lib;
+      let
+        cfg = config.services.nixos-exporter;
+      in {
+        options = {
+          services.nixos-exporter = {
+            enable = mkEnableOption "Export NixOS status metrics";
+            listen = mkOption {
+              type = with types; nullOr str;
+              default = null;
+              description = "Interface for metrics";
+              example = "[::]:2345";
+            };
+          };
+        };
+
+        config = mkIf cfg.enable {
+          users.users."nixos-exporter" = {
+            isSystemUser = true;
+            group = "nixos-exporter";
+          };
+
+          users.groups."nixos-exporter" = {};
+
+          systemd.services."nixos-exporter" = {
+            wantedBy = [ "multi-user.target" ];
+            after = [ "network.target" ];
+            serviceConfig = {
+              Restart = "always";
+              PrivateTmp = true;
+              WorkingDirectory = "/tmp";
+              RuntimeDirectory = "nixos-exporter";
+              User = "nixos-exporter";
+              Group = "nixos-exporter";
+              ExecStart = ''
+                ${self.packages."${config.nixpkgs.system}".nixos-exporter}/bin/nixos-exporter ${optionalString (cfg.listen != null) "--listen ${escapeShellArg cfg.listen}"}
+              '';
+            };
+          };
+        };
+      };
+
+      nixos-validator = { config, pkgs, lib, ... }:
+      with lib;
+      let
+        cfg = config.services.nixos-validator;
+      in {
+        options = {
+          services.nixos-validator = {
+            enable = mkEnableOption "Validate NixOS metrics";
+            listen = mkOption {
+              type = with types; nullOr str;
+              default = null;
+              description = "Interface for metrics";
+              example = "[::]:2345";
+            };
+            prometheusUrl = mkOption {
+              type = types.str;
+              description = "Url for Prometheus";
+              example = "https://prometheus.monitoring.clerie.de";
+            };
+            prometheusQueryTagTemplate = mkOption {
+              type = with types; nullOr str;
+              default = null;
+              description = "Template for Prometheus Query";
+              example = "instance=\"{}\"";
+            };
+            hydraUrl = mkOption {
+              type = types.str;
+              description = "Url for Hydra";
+              example = "https://hydra.clerie.de";
+            };
+            hydraJobTemplate = mkOption {
+              type = with types; nullOr str;
+              default = null;
+              description = "Template for Hydra Job Url";
+              example = "nixfiles/nixfiles/nixosConfigurations.{}";
+            };
+          };
+        };
+
+        config = mkIf cfg.enable {
+          users.users."nixos-validator" = {
+            isSystemUser = true;
+            group = "nixos-validator";
+          };
+
+          users.groups."nixos-validator" = {};
+
+          systemd.services."nixos-validator" = {
+            wantedBy = [ "multi-user.target" ];
+            after = [ "network.target" ];
+            serviceConfig = {
+              Restart = "always";
+              PrivateTmp = true;
+              WorkingDirectory = "/tmp";
+              RuntimeDirectory = "nixos-validator";
+              User = "nixos-validator";
+              Group = "nixos-validator";
+              ExecStart = ''
+                ${self.packages."${config.nixpkgs.system}".nixos-exporter}/bin/nixos-validator ${concatStringsSep " " [
+                  (optionalString (cfg.listen != null) "--listen ${escapeShellArg cfg.listen}")
+                  "--prometheus-url ${escapeShellArg cfg.prometheusUrl}"
+                  (optionalString (cfg.prometheusQueryTagTemplate != null) "--prometheus-query-tag-template ${escapeShellArg cfg.prometheusQueryTagTemplate}")
+                  "--hydra-url ${escapeShellArg cfg.hydraUrl}"
+                  (optionalString (cfg.hydraJobTemplate != null) "--hydra-job-template ${escapeShellArg cfg.hydraJobTemplate}")
+                ]}
+              '';
+            };
+          };
+        };
+      };
+
+      default = { ... }:
+      {
+        imports = [
+          self.nixosModules.nixos-exporter
+          self.nixosModules.nixos-validator
+        ];
+      };
+    };
+
     hydraJobs = {
       packages.x86_64-linux.nixos-exporter = self.packages.x86_64-linux.nixos-exporter;
     };
   };
 }
-